Mercurial > hg > octave-lyh
annotate src/lex.l @ 7728:13820b9f5fd9
more consistent handling of CR/CRLF/LF line endings in lexer and parser
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Wed, 23 Apr 2008 16:03:34 -0400 |
| parents | 74f5e0c7de9e |
| children | cce16b4e0970 |
| rev | line source |
|---|---|
| 1994 | 1 /* |
| 1 | 2 |
| 7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 4 2002, 2003, 2004, 2005, 2006, 2007 John W. Eaton | |
| 1 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 1 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 1 | 21 |
| 22 */ | |
| 23 | |
| 4753 | 24 %option prefix = "octave_" |
| 25 | |
| 4208 | 26 %s COMMAND_START |
| 27 %s MATRIX_START | |
| 4240 | 28 |
|
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29 %x SCRIPT_FILE_BEGIN |
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30 |
| 4240 | 31 %x NESTED_FUNCTION_END |
| 32 %x NESTED_FUNCTION_BEGIN | |
| 1 | 33 |
| 34 %{ | |
| 240 | 35 #ifdef HAVE_CONFIG_H |
| 1220 | 36 #include <config.h> |
| 240 | 37 #endif |
| 38 | |
| 1341 | 39 #include <cctype> |
| 40 #include <cstring> | |
| 41 | |
| 5765 | 42 #include <sstream> |
| 1823 | 43 #include <string> |
| 4214 | 44 #include <stack> |
| 1823 | 45 |
| 4093 | 46 #ifdef HAVE_UNISTD_H |
| 47 #ifdef HAVE_SYS_TYPES_H | |
| 48 #include <sys/types.h> | |
| 49 #endif | |
| 50 #include <unistd.h> | |
| 51 #endif | |
| 52 | |
| 2926 | 53 #include "cmd-edit.h" |
| 4153 | 54 #include "quit.h" |
| 4910 | 55 #include "lo-mappers.h" |
| 2926 | 56 |
| 1497 | 57 // These would be alphabetical, but y.tab.h must be included before |
| 58 // oct-gperf.h and y.tab.h must be included after token.h and the tree | |
| 59 // class declarations. We can't include y.tab.h in oct-gperf.h | |
| 60 // because it may not be protected to allow it to be included multiple | |
| 61 // times. | |
| 62 | |
| 4264 | 63 #include "Cell.h" |
| 3665 | 64 #include "comment-list.h" |
| 2181 | 65 #include "defun.h" |
| 1355 | 66 #include "error.h" |
| 4910 | 67 #include "gripes.h" |
| 1351 | 68 #include "input.h" |
| 1355 | 69 #include "lex.h" |
| 2891 | 70 #include "ov.h" |
| 1355 | 71 #include "parse.h" |
| 2987 | 72 #include "pt-all.h" |
| 2891 | 73 #include "symtab.h" |
| 74 #include "token.h" | |
| 75 #include "toplev.h" | |
| 1355 | 76 #include "utils.h" |
| 77 #include "variables.h" | |
| 2492 | 78 #include <y.tab.h> |
| 79 #include <oct-gperf.h> | |
| 1 | 80 |
| 2716 | 81 #if ! (defined (FLEX_SCANNER) \ |
| 82 && defined (YY_FLEX_MAJOR_VERSION) && YY_FLEX_MAJOR_VERSION >= 2 \ | |
| 83 && defined (YY_FLEX_MINOR_VERSION) && YY_FLEX_MINOR_VERSION >= 5) | |
| 84 #error lex.l requires flex version 2.5.4 or later | |
| 85 #endif | |
| 86 | |
| 4753 | 87 #define yylval octave_lval |
| 88 | |
| 89 // Arrange to get input via readline. | |
| 90 | |
| 91 #ifdef YY_INPUT | |
| 92 #undef YY_INPUT | |
| 93 #endif | |
| 94 #define YY_INPUT(buf, result, max_size) \ | |
| 95 if ((result = octave_read (buf, max_size)) < 0) \ | |
| 96 YY_FATAL_ERROR ("octave_read () in flex scanner failed"); | |
| 97 | |
| 98 // Try to avoid crashing out completely on fatal scanner errors. | |
| 99 // The call to yy_fatal_error should never happen, but it avoids a | |
| 100 // `static function defined but not used' warning from gcc. | |
| 101 | |
| 102 #ifdef YY_FATAL_ERROR | |
| 103 #undef YY_FATAL_ERROR | |
| 104 #endif | |
| 105 #define YY_FATAL_ERROR(msg) \ | |
| 106 do \ | |
| 107 { \ | |
| 108 error (msg); \ | |
| 109 OCTAVE_QUIT; \ | |
| 110 yy_fatal_error (msg); \ | |
| 111 } \ | |
| 112 while (0) | |
| 113 | |
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114 #define DISPLAY_TOK_AND_RETURN(tok) \ |
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115 do \ |
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116 { \ |
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117 int tok_val = tok; \ |
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118 if (Vdisplay_tokens) \ |
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119 display_token (tok_val); \ |
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120 return tok_val; \ |
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121 } \ |
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122 while (0) |
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123 |
| 4910 | 124 #define COUNT_TOK_AND_RETURN(tok) \ |
| 125 do \ | |
| 126 { \ | |
| 127 Vtoken_count++; \ | |
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128 DISPLAY_TOK_AND_RETURN (tok); \ |
| 4910 | 129 } \ |
| 130 while (0) | |
| 131 | |
| 4753 | 132 #define TOK_RETURN(tok) \ |
| 133 do \ | |
| 134 { \ | |
| 135 current_input_column += yyleng; \ | |
| 136 lexer_flags.quote_is_transpose = false; \ | |
| 137 lexer_flags.convert_spaces_to_comma = true; \ | |
| 4910 | 138 COUNT_TOK_AND_RETURN (tok); \ |
| 4753 | 139 } \ |
| 140 while (0) | |
| 141 | |
| 142 #define TOK_PUSH_AND_RETURN(name, tok) \ | |
| 143 do \ | |
| 144 { \ | |
| 145 yylval.tok_val = new token (name, input_line_number, \ | |
| 146 current_input_column); \ | |
| 147 token_stack.push (yylval.tok_val); \ | |
| 148 TOK_RETURN (tok); \ | |
| 149 } \ | |
| 150 while (0) | |
| 151 | |
| 152 #define BIN_OP_RETURN(tok, convert) \ | |
| 153 do \ | |
| 154 { \ | |
| 155 yylval.tok_val = new token (input_line_number, current_input_column); \ | |
| 156 token_stack.push (yylval.tok_val); \ | |
| 157 current_input_column += yyleng; \ | |
| 158 lexer_flags.quote_is_transpose = false; \ | |
| 159 lexer_flags.convert_spaces_to_comma = convert; \ | |
| 4910 | 160 COUNT_TOK_AND_RETURN (tok); \ |
| 4753 | 161 } \ |
| 162 while (0) | |
| 163 | |
| 164 #define XBIN_OP_RETURN(tok, convert) \ | |
| 165 do \ | |
| 166 { \ | |
| 167 gripe_matlab_incompatible_operator (yytext); \ | |
| 168 BIN_OP_RETURN (tok, convert); \ | |
| 169 } \ | |
| 170 while (0) | |
| 171 | |
| 3883 | 172 // TRUE means that we have encountered EOF on the input stream. |
| 173 bool parser_end_of_input = false; | |
| 174 | |
| 1826 | 175 // Flags that need to be shared between the lexer and parser. |
| 176 lexical_feedback lexer_flags; | |
| 177 | |
| 1351 | 178 // Stack to hold tokens so that we can delete them when the parser is |
| 179 // reset and avoid growing forever just because we are stashing some | |
| 180 // information. This has to appear before lex.h is included, because | |
| 181 // one of the macros defined there uses token_stack. | |
| 2614 | 182 // |
| 5775 | 183 // FIXME -- this should really be static, but that causes |
| 2614 | 184 // problems on some systems. |
| 4214 | 185 std::stack <token*> token_stack; |
| 1351 | 186 |
| 1826 | 187 // Did eat_whitespace() eat a space or tab, or a newline, or both? |
| 1 | 188 |
| 1826 | 189 typedef int yum_yum; |
| 1 | 190 |
| 1826 | 191 const yum_yum ATE_NOTHING = 0; |
| 192 const yum_yum ATE_SPACE_OR_TAB = 1; | |
| 193 const yum_yum ATE_NEWLINE = 2; | |
| 1088 | 194 |
| 3351 | 195 // Is the closest nesting level a square bracket, squiggly brace or a paren? |
| 1826 | 196 |
| 4214 | 197 class bracket_brace_paren_nesting_level |
| 1826 | 198 { |
| 199 public: | |
| 200 | |
| 4214 | 201 bracket_brace_paren_nesting_level (void) : context () { } |
| 1826 | 202 |
| 3351 | 203 ~bracket_brace_paren_nesting_level (void) { } |
| 204 | |
| 4214 | 205 void bracket (void) { context.push (BRACKET); } |
| 206 bool is_bracket (void) | |
| 207 { return ! context.empty () && context.top () == BRACKET; } | |
| 208 | |
| 209 void brace (void) { context.push (BRACE); } | |
| 210 bool is_brace (void) | |
| 211 { return ! context.empty () && context.top () == BRACE; } | |
| 212 | |
| 213 void paren (void) { context.push (PAREN); } | |
| 214 bool is_paren (void) | |
| 215 { return ! context.empty () && context.top () == PAREN; } | |
| 216 | |
| 4608 | 217 bool is_bracket_or_brace (void) |
| 218 { return (! context.empty () | |
| 219 && (context.top () == BRACKET || context.top () == BRACE)); } | |
| 220 | |
| 4214 | 221 bool none (void) { return context.empty (); } |
| 222 | |
| 223 void remove (void) { if (! context.empty ()) context.pop (); } | |
| 224 | |
| 225 void clear (void) { while (! context.empty ()) context.pop (); } | |
| 1826 | 226 |
| 227 private: | |
| 228 | |
| 4214 | 229 std::stack<int> context; |
| 230 | |
| 5225 | 231 static const int BRACKET; |
| 232 static const int BRACE; | |
| 233 static const int PAREN; | |
| 1826 | 234 |
| 3351 | 235 bracket_brace_paren_nesting_level (const bracket_brace_paren_nesting_level&); |
| 1826 | 236 |
| 3351 | 237 bracket_brace_paren_nesting_level& |
| 238 operator = (const bracket_brace_paren_nesting_level&); | |
| 1826 | 239 }; |
| 240 | |
| 5225 | 241 const int bracket_brace_paren_nesting_level::BRACKET = 1; |
| 242 const int bracket_brace_paren_nesting_level::BRACE = 2; | |
| 243 const int bracket_brace_paren_nesting_level::PAREN = 3; | |
| 244 | |
| 3351 | 245 static bracket_brace_paren_nesting_level nesting_level; |
| 1 | 246 |
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247 static bool Vdisplay_tokens = false; |
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248 |
| 4910 | 249 static unsigned int Vtoken_count = 0; |
| 250 | |
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251 // The start state that was in effect when the beginning of a block |
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252 // comment was noticed. |
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253 static int block_comment_nesting_level = 0; |
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254 |
| 146 | 255 // Forward declarations for functions defined at the bottom of this |
| 256 // file. | |
| 257 | |
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258 static int text_yyinput (void); |
| 1 | 259 static void fixup_column_count (char *s); |
| 146 | 260 static void do_comma_insert_check (void); |
| 4867 | 261 static int is_keyword_token (const std::string& s); |
| 4238 | 262 static void prep_for_function (void); |
| 263 static void prep_for_nested_function (void); | |
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264 static int process_comment (bool start_in_block, bool& eof); |
| 2857 | 265 static bool match_any (char c, const char *s); |
| 3263 | 266 static bool next_token_is_sep_op (void); |
| 3246 | 267 static bool next_token_is_bin_op (bool spc_prev); |
| 268 static bool next_token_is_postfix_unary_op (bool spc_prev); | |
| 3523 | 269 static std::string strip_trailing_whitespace (char *s); |
| 3246 | 270 static void handle_number (void); |
| 975 | 271 static int handle_string (char delim, int text_style = 0); |
| 4612 | 272 static int handle_close_bracket (bool spc_gobbled, int bracket_type); |
| 3974 | 273 static int handle_identifier (void); |
| 3096 | 274 static bool have_continuation (bool trailing_comments_ok = true); |
| 275 static bool have_ellipsis_continuation (bool trailing_comments_ok = true); | |
| 3665 | 276 static void scan_for_comments (const char *); |
| 1826 | 277 static yum_yum eat_whitespace (void); |
| 278 static yum_yum eat_continuation (void); | |
| 3388 | 279 static void maybe_warn_separator_insert (char sep); |
| 3400 | 280 static void gripe_single_quote_string (void); |
| 4037 | 281 static void gripe_matlab_incompatible (const std::string& msg); |
| 282 static void maybe_gripe_matlab_incompatible_comment (char c); | |
| 283 static void gripe_matlab_incompatible_continuation (void); | |
| 284 static void gripe_matlab_incompatible_operator (const std::string& op); | |
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285 static void display_token (int tok); |
| 1 | 286 |
| 287 %} | |
| 288 | |
| 289 D [0-9] | |
| 290 S [ \t] | |
| 5570 | 291 NL ((\n)|(\r)|(\r\n)) |
| 2042 | 292 SNL ({S}|{NL}) |
| 1 | 293 EL (\.\.\.) |
| 967 | 294 BS (\\) |
| 295 CONT ({EL}|{BS}) | |
| 1 | 296 Im [iIjJ] |
| 967 | 297 CCHAR [#%] |
| 298 COMMENT ({CCHAR}.*{NL}) | |
| 299 SNLCMT ({SNL}|{COMMENT}) | |
| 300 NOT ((\~)|(\!)) | |
| 4037 | 301 POW ((\*\*)|(\^)) |
| 302 EPOW (\.{POW}) | |
| 5290 | 303 IDENT ([_$a-zA-Z][_$a-zA-Z0-9]*) |
| 1 | 304 EXPON ([DdEe][+-]?{D}+) |
| 3220 | 305 NUMBER (({D}+\.?{D}*{EXPON}?)|(\.{D}+{EXPON}?)|(0[xX][0-9a-fA-F]+)) |
| 1 | 306 %% |
| 307 | |
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308 <SCRIPT_FILE_BEGIN>. { |
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309 BEGIN (INITIAL); |
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310 yyunput (yytext[0], yytext); |
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311 COUNT_TOK_AND_RETURN (SCRIPT); |
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312 } |
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313 |
| 4240 | 314 <NESTED_FUNCTION_END>. { |
| 4323 | 315 BEGIN (NESTED_FUNCTION_BEGIN); |
| 4410 | 316 yyunput (yytext[0], yytext); |
| 4910 | 317 COUNT_TOK_AND_RETURN (';'); |
| 4240 | 318 } |
| 319 | |
| 320 <NESTED_FUNCTION_BEGIN>. { | |
| 4323 | 321 BEGIN (INITIAL); |
| 4410 | 322 yyunput (yytext[0], yytext); |
| 4238 | 323 prep_for_nested_function (); |
| 4910 | 324 COUNT_TOK_AND_RETURN (FCN); |
| 4238 | 325 } |
| 326 | |
| 968 | 327 %{ |
| 4208 | 328 // Help and other command-style functions are a pain in the ass. This |
| 968 | 329 // stuff needs to be simplified. May require some changes in the |
| 330 // parser too. | |
| 331 %} | |
| 332 | |
| 4208 | 333 <COMMAND_START>{NL} { |
| 4323 | 334 BEGIN (INITIAL); |
| 967 | 335 current_input_column = 1; |
| 2857 | 336 lexer_flags.quote_is_transpose = false; |
| 337 lexer_flags.convert_spaces_to_comma = true; | |
| 5212 | 338 lexer_flags.doing_rawcommand = false; |
| 4910 | 339 COUNT_TOK_AND_RETURN ('\n'); |
| 967 | 340 } |
| 1 | 341 |
| 4208 | 342 <COMMAND_START>[\;\,] { |
| 5102 | 343 if (lexer_flags.doing_rawcommand) |
| 5279 | 344 TOK_PUSH_AND_RETURN (yytext, SQ_STRING); |
| 5102 | 345 |
| 346 BEGIN (INITIAL); | |
| 347 | |
| 348 if (strcmp (yytext, ",") == 0) | |
| 349 TOK_RETURN (','); | |
| 967 | 350 else |
| 5102 | 351 TOK_RETURN (';'); |
| 967 | 352 } |
| 1 | 353 |
| 4208 | 354 <COMMAND_START>[\"\'] { |
| 975 | 355 current_input_column++; |
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356 int tok = handle_string (yytext[0], true); |
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357 COUNT_TOK_AND_RETURN (tok); |
| 975 | 358 } |
| 359 | |
| 4923 | 360 <COMMAND_START>[^#% \t\r\n\;\,\"\'][^ \t\r\n\;\,]*{S}* { |
| 3523 | 361 std::string tok = strip_trailing_whitespace (yytext); |
| 5279 | 362 TOK_PUSH_AND_RETURN (tok, SQ_STRING); |
| 967 | 363 } |
| 1 | 364 |
| 968 | 365 %{ |
| 1 | 366 // For this and the next two rules, we're looking at ']', and we |
| 971 | 367 // need to know if the next token is `=' or `=='. |
| 1 | 368 // |
| 369 // It would have been so much easier if the delimiters were simply | |
| 370 // different for the expression on the left hand side of the equals | |
| 371 // operator. | |
| 971 | 372 // |
| 373 // It's also a pain in the ass to decide whether to insert a comma | |
| 374 // after seeing a ']' character... | |
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375 |
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376 // FIXME -- we need to handle block comments here. |
| 968 | 377 %} |
| 378 | |
| 4208 | 379 <MATRIX_START>{SNLCMT}*\]{S}* { |
| 3665 | 380 scan_for_comments (yytext); |
| 1001 | 381 fixup_column_count (yytext); |
| 382 int c = yytext[yyleng-1]; | |
| 383 int cont_is_spc = eat_continuation (); | |
| 4608 | 384 bool spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); |
| 5345 | 385 int tok_to_return = handle_close_bracket (spc_gobbled, ']'); |
| 386 if (spc_gobbled) | |
| 387 yyunput (' ', yytext); | |
| 388 COUNT_TOK_AND_RETURN (tok_to_return); | |
| 4608 | 389 } |
| 390 | |
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391 %{ |
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392 // FIXME -- we need to handle block comments here. |
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393 %} |
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394 |
| 4608 | 395 <MATRIX_START>{SNLCMT}*\}{S}* { |
| 396 scan_for_comments (yytext); | |
| 397 fixup_column_count (yytext); | |
| 398 int c = yytext[yyleng-1]; | |
| 399 int cont_is_spc = eat_continuation (); | |
| 400 bool spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); | |
| 5345 | 401 int tok_to_return = handle_close_bracket (spc_gobbled, '}'); |
| 402 if (spc_gobbled) | |
| 403 yyunput (' ', yytext); | |
| 404 COUNT_TOK_AND_RETURN (tok_to_return); | |
| 967 | 405 } |
| 1 | 406 |
| 968 | 407 %{ |
| 1088 | 408 // Commas are element separators in matrix constants. If we don't |
| 409 // check for continuations here we can end up inserting too many | |
| 410 // commas. | |
| 968 | 411 %} |
| 412 | |
| 4208 | 413 <MATRIX_START>{S}*\,{S}* { |
| 1088 | 414 current_input_column += yyleng; |
| 3388 | 415 |
| 1088 | 416 int tmp = eat_continuation (); |
| 3388 | 417 |
| 2857 | 418 lexer_flags.quote_is_transpose = false; |
| 419 lexer_flags.convert_spaces_to_comma = true; | |
| 3388 | 420 |
| 421 if ((tmp & ATE_NEWLINE) == ATE_NEWLINE) | |
| 422 { | |
| 423 maybe_warn_separator_insert (';'); | |
| 424 | |
| 4476 | 425 yyunput (';', yytext); |
| 3388 | 426 } |
| 427 | |
| 4910 | 428 COUNT_TOK_AND_RETURN (','); |
| 967 | 429 } |
| 1 | 430 |
| 968 | 431 %{ |
| 432 // In some cases, spaces in matrix constants can turn into commas. | |
| 433 // If commas are required, spaces are not important in matrix | |
| 1088 | 434 // constants so we just eat them. If we don't check for continuations |
| 435 // here we can end up inserting too many commas. | |
| 968 | 436 %} |
| 430 | 437 |
| 4208 | 438 <MATRIX_START>{S}+ { |
| 1088 | 439 current_input_column += yyleng; |
| 3388 | 440 |
| 441 int tmp = eat_continuation (); | |
| 442 int bin_op = next_token_is_bin_op (true); | |
| 443 int postfix_un_op = next_token_is_postfix_unary_op (true); | |
| 444 | |
| 445 if (! (postfix_un_op || bin_op) | |
| 4608 | 446 && nesting_level.is_bracket_or_brace () |
| 3388 | 447 && lexer_flags.convert_spaces_to_comma) |
| 967 | 448 { |
| 3388 | 449 if ((tmp & ATE_NEWLINE) == ATE_NEWLINE) |
| 450 { | |
| 451 maybe_warn_separator_insert (';'); | |
| 967 | 452 |
| 4476 | 453 yyunput (';', yytext); |
| 3388 | 454 } |
| 455 | |
| 4476 | 456 lexer_flags.quote_is_transpose = false; |
| 457 lexer_flags.convert_spaces_to_comma = true; | |
| 458 | |
| 459 maybe_warn_separator_insert (','); | |
| 460 | |
| 4910 | 461 COUNT_TOK_AND_RETURN (','); |
| 967 | 462 } |
| 463 } | |
| 430 | 464 |
| 968 | 465 %{ |
| 1088 | 466 // Semicolons are handled as row seprators in matrix constants. If we |
| 467 // don't eat whitespace here we can end up inserting too many | |
| 468 // semicolons. | |
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469 |
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470 // FIXME -- we need to handle block comments here. |
| 968 | 471 %} |
| 472 | |
| 4208 | 473 <MATRIX_START>{SNLCMT}*;{SNLCMT}* { |
| 3665 | 474 scan_for_comments (yytext); |
| 967 | 475 fixup_column_count (yytext); |
| 1001 | 476 eat_whitespace (); |
| 2857 | 477 lexer_flags.quote_is_transpose = false; |
| 478 lexer_flags.convert_spaces_to_comma = true; | |
| 4910 | 479 COUNT_TOK_AND_RETURN (';'); |
| 967 | 480 } |
| 481 | |
| 968 | 482 %{ |
| 1088 | 483 // In some cases, new lines can also become row separators. If we |
| 484 // don't eat whitespace here we can end up inserting too many | |
| 485 // semicolons. | |
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486 |
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487 // FIXME -- we need to handle block comments here. |
| 985 | 488 %} |
| 489 | |
| 4208 | 490 <MATRIX_START>{S}*{COMMENT}{SNLCMT}* | |
| 491 <MATRIX_START>{S}*{NL}{SNLCMT}* { | |
| 3665 | 492 scan_for_comments (yytext); |
| 1082 | 493 fixup_column_count (yytext); |
| 1088 | 494 eat_whitespace (); |
| 3388 | 495 |
| 4476 | 496 lexer_flags.quote_is_transpose = false; |
| 497 lexer_flags.convert_spaces_to_comma = true; | |
| 498 | |
| 499 if (nesting_level.none ()) | |
| 500 return LEXICAL_ERROR; | |
| 985 | 501 |
| 4608 | 502 if (nesting_level.is_bracket_or_brace ()) |
| 3388 | 503 { |
| 504 maybe_warn_separator_insert (';'); | |
| 505 | |
| 4910 | 506 COUNT_TOK_AND_RETURN (';'); |
| 985 | 507 } |
| 508 } | |
| 509 | |
| 967 | 510 \[{S}* { |
| 3351 | 511 nesting_level.bracket (); |
| 975 | 512 |
| 1082 | 513 current_input_column += yyleng; |
| 2857 | 514 lexer_flags.quote_is_transpose = false; |
| 515 lexer_flags.convert_spaces_to_comma = true; | |
| 975 | 516 |
| 5615 | 517 if (lexer_flags.defining_func && ! lexer_flags.parsed_function_name) |
| 518 lexer_flags.looking_at_return_list = true; | |
| 519 else | |
| 520 lexer_flags.looking_at_matrix_or_assign_lhs = true; | |
| 521 | |
| 975 | 522 promptflag--; |
| 523 eat_whitespace (); | |
| 524 | |
| 5102 | 525 lexer_flags.bracketflag++; |
| 526 BEGIN (MATRIX_START); | |
| 527 COUNT_TOK_AND_RETURN ('['); | |
| 967 | 528 } |
| 1 | 529 |
| 968 | 530 \] { |
| 1826 | 531 nesting_level.remove (); |
| 968 | 532 |
| 5102 | 533 TOK_RETURN (']'); |
| 968 | 534 } |
| 535 | |
| 536 %{ | |
| 537 // Imaginary numbers. | |
| 538 %} | |
| 539 | |
| 540 {NUMBER}{Im} { | |
| 3246 | 541 handle_number (); |
| 4910 | 542 COUNT_TOK_AND_RETURN (IMAG_NUM); |
| 968 | 543 } |
| 544 | |
| 545 %{ | |
| 546 // Real numbers. Don't grab the `.' part of a dot operator as part of | |
| 547 // the constant. | |
| 548 %} | |
| 549 | |
| 550 {D}+/\.[\*/\\^'] | | |
| 551 {NUMBER} { | |
| 3246 | 552 handle_number (); |
| 4910 | 553 COUNT_TOK_AND_RETURN (NUM); |
| 968 | 554 } |
| 555 | |
| 556 %{ | |
| 557 // Eat whitespace. Whitespace inside matrix constants is handled by | |
| 4208 | 558 // the <MATRIX_START> start state code above. |
| 968 | 559 %} |
| 560 | |
| 967 | 561 {S}* { |
| 562 current_input_column += yyleng; | |
| 563 } | |
| 564 | |
| 968 | 565 %{ |
| 566 // Continuation lines. Allow comments after continuations. | |
| 567 %} | |
| 568 | |
| 967 | 569 {CONT}{S}*{NL} | |
| 570 {CONT}{S}*{COMMENT} { | |
| 4037 | 571 if (yytext[0] == '\\') |
| 572 gripe_matlab_incompatible_continuation (); | |
| 3665 | 573 scan_for_comments (yytext); |
| 967 | 574 promptflag--; |
| 575 current_input_column = 1; | |
| 576 } | |
| 1 | 577 |
| 968 | 578 %{ |
| 579 // End of file. | |
| 580 %} | |
| 581 | |
| 967 | 582 <<EOF>> { |
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583 if (block_comment_nesting_level != 0) |
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584 { |
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585 warning ("block comment open at end of input"); |
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586 |
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587 if ((reading_fcn_file || reading_script_file) |
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588 && ! curr_fcn_file_name.empty ()) |
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589 warning ("near line %d of file `%s.m'", |
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590 input_line_number, curr_fcn_file_name.c_str ()); |
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591 } |
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592 |
| 967 | 593 TOK_RETURN (END_OF_INPUT); |
| 594 } | |
| 1 | 595 |
| 968 | 596 %{ |
| 970 | 597 // Identifiers. Truncate the token at the first space or tab but |
| 598 // don't write directly on yytext. | |
| 968 | 599 %} |
| 600 | |
| 967 | 601 {IDENT}{S}* { |
| 4238 | 602 int id_tok = handle_identifier (); |
| 603 | |
| 604 if (id_tok >= 0) | |
| 4910 | 605 COUNT_TOK_AND_RETURN (id_tok); |
| 967 | 606 } |
| 1 | 607 |
| 968 | 608 %{ |
| 4342 | 609 // Function handles. |
| 610 %} | |
| 611 | |
| 4930 | 612 "@" { |
| 613 current_input_column++; | |
| 614 lexer_flags.quote_is_transpose = false; | |
| 615 lexer_flags.convert_spaces_to_comma = false; | |
| 616 lexer_flags.looking_at_function_handle++; | |
| 617 COUNT_TOK_AND_RETURN ('@'); | |
| 4342 | 618 } |
| 619 | |
| 620 %{ | |
| 968 | 621 // A new line character. New line characters inside matrix constants |
| 4208 | 622 // are handled by the <MATRIX_START> start state code above. If closest |
| 985 | 623 // nesting is inside parentheses, don't return a row separator. |
| 968 | 624 %} |
| 625 | |
| 967 | 626 {NL} { |
| 627 current_input_column = 1; | |
| 2857 | 628 lexer_flags.quote_is_transpose = false; |
| 629 lexer_flags.convert_spaces_to_comma = true; | |
| 1826 | 630 if (nesting_level.none ()) |
| 4910 | 631 COUNT_TOK_AND_RETURN ('\n'); |
| 4037 | 632 else if (nesting_level.is_paren ()) |
| 633 gripe_matlab_incompatible ("bare newline inside parentheses"); | |
| 4608 | 634 else if (nesting_level.is_bracket_or_brace ()) |
| 985 | 635 return LEXICAL_ERROR; |
| 967 | 636 } |
| 1 | 637 |
| 968 | 638 %{ |
| 639 // Single quote can either be the beginning of a string or a transpose | |
| 640 // operator. | |
| 641 %} | |
| 642 | |
| 967 | 643 "'" { |
| 644 current_input_column++; | |
| 2857 | 645 lexer_flags.convert_spaces_to_comma = true; |
| 1 | 646 |
| 1826 | 647 if (lexer_flags.quote_is_transpose) |
| 967 | 648 { |
| 649 do_comma_insert_check (); | |
| 4910 | 650 COUNT_TOK_AND_RETURN (QUOTE); |
| 967 | 651 } |
| 652 else | |
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653 { |
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654 int tok = handle_string ('\''); |
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655 COUNT_TOK_AND_RETURN (tok); |
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656 } |
| 967 | 657 } |
| 1 | 658 |
| 968 | 659 %{ |
| 971 | 660 // Double quotes always begin strings. |
| 661 %} | |
| 662 | |
| 973 | 663 \" { |
| 664 current_input_column++; | |
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665 int tok = handle_string ('"'); |
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666 COUNT_TOK_AND_RETURN (tok); |
| 973 | 667 } |
| 971 | 668 |
| 669 %{ | |
| 985 | 670 // Gobble comments. If closest nesting is inside parentheses, don't |
| 671 // return a new line. | |
| 672 %} | |
| 968 | 673 |
| 967 | 674 {CCHAR} { |
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675 yyunput (yytext[0], yytext); |
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676 |
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677 bool eof = false; |
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678 int tok = process_comment (false, eof); |
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679 |
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680 if (eof) |
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681 TOK_RETURN (END_OF_INPUT); |
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682 else if (tok > 0) |
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683 COUNT_TOK_AND_RETURN (tok); |
| 967 | 684 } |
| 440 | 685 |
| 968 | 686 %{ |
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687 // Block comments. |
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688 %} |
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689 |
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690 ^{S}*{CCHAR}\{{S}*{NL} { |
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691 current_input_column = 1; |
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692 block_comment_nesting_level++; |
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693 promptflag--; |
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694 bool eof = false; |
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695 process_comment (true, eof); |
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696 } |
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697 |
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698 %{ |
| 968 | 699 // Other operators. |
| 700 %} | |
| 701 | |
| 5102 | 702 ":" { BIN_OP_RETURN (':', false); } |
| 703 | |
| 4037 | 704 ".+" { XBIN_OP_RETURN (EPLUS, false); } |
| 705 ".-" { XBIN_OP_RETURN (EMINUS, false); } | |
| 2857 | 706 ".*" { BIN_OP_RETURN (EMUL, false); } |
| 707 "./" { BIN_OP_RETURN (EDIV, false); } | |
| 708 ".\\" { BIN_OP_RETURN (ELEFTDIV, false); } | |
| 4037 | 709 ".^" { BIN_OP_RETURN (EPOW, false); } |
| 710 ".**" { XBIN_OP_RETURN (EPOW, false); } | |
| 2857 | 711 ".'" { do_comma_insert_check (); BIN_OP_RETURN (TRANSPOSE, true); } |
| 4037 | 712 "++" { do_comma_insert_check (); XBIN_OP_RETURN (PLUS_PLUS, true); } |
| 713 "--" { do_comma_insert_check (); XBIN_OP_RETURN (MINUS_MINUS, true); } | |
| 2857 | 714 "<=" { BIN_OP_RETURN (EXPR_LE, false); } |
| 715 "==" { BIN_OP_RETURN (EXPR_EQ, false); } | |
| 4037 | 716 "~=" { BIN_OP_RETURN (EXPR_NE, false); } |
| 717 "!=" { XBIN_OP_RETURN (EXPR_NE, false); } | |
| 2857 | 718 ">=" { BIN_OP_RETURN (EXPR_GE, false); } |
| 2877 | 719 "&" { BIN_OP_RETURN (EXPR_AND, false); } |
| 2857 | 720 "|" { BIN_OP_RETURN (EXPR_OR, false); } |
| 721 "<" { BIN_OP_RETURN (EXPR_LT, false); } | |
| 722 ">" { BIN_OP_RETURN (EXPR_GT, false); } | |
| 5102 | 723 "+" { BIN_OP_RETURN ('+', false); } |
| 724 "-" { BIN_OP_RETURN ('-', false); } | |
| 2857 | 725 "*" { BIN_OP_RETURN ('*', false); } |
| 726 "/" { BIN_OP_RETURN ('/', false); } | |
| 727 "\\" { BIN_OP_RETURN (LEFTDIV, false); } | |
| 728 ";" { BIN_OP_RETURN (';', true); } | |
| 729 "," { BIN_OP_RETURN (',', true); } | |
| 4037 | 730 "^" { BIN_OP_RETURN (POW, false); } |
| 731 "**" { XBIN_OP_RETURN (POW, false); } | |
| 2857 | 732 "=" { BIN_OP_RETURN ('=', true); } |
| 2877 | 733 "&&" { BIN_OP_RETURN (EXPR_AND_AND, false); } |
| 2857 | 734 "||" { BIN_OP_RETURN (EXPR_OR_OR, false); } |
| 4037 | 735 "<<" { XBIN_OP_RETURN (LSHIFT, false); } |
| 736 ">>" { XBIN_OP_RETURN (RSHIFT, false); } | |
| 967 | 737 |
| 738 {NOT} { | |
| 4037 | 739 if (yytext[0] == '~') |
| 740 BIN_OP_RETURN (EXPR_NOT, false); | |
| 741 else | |
| 742 XBIN_OP_RETURN (EXPR_NOT, false); | |
| 967 | 743 } |
| 1 | 744 |
| 967 | 745 "(" { |
| 4131 | 746 lexer_flags.looking_at_indirect_ref = false; |
| 1826 | 747 nesting_level.paren (); |
| 985 | 748 promptflag--; |
| 967 | 749 TOK_RETURN ('('); |
| 750 } | |
| 751 | |
| 752 ")" { | |
| 1826 | 753 nesting_level.remove (); |
| 967 | 754 current_input_column++; |
| 2857 | 755 lexer_flags.quote_is_transpose = true; |
| 4608 | 756 lexer_flags.convert_spaces_to_comma = nesting_level.is_bracket_or_brace (); |
| 1001 | 757 do_comma_insert_check (); |
| 4910 | 758 COUNT_TOK_AND_RETURN (')'); |
| 967 | 759 } |
| 760 | |
| 5102 | 761 "." { TOK_RETURN ('.'); } |
| 2066 | 762 |
| 4037 | 763 "+=" { XBIN_OP_RETURN (ADD_EQ, false); } |
| 764 "-=" { XBIN_OP_RETURN (SUB_EQ, false); } | |
| 765 "*=" { XBIN_OP_RETURN (MUL_EQ, false); } | |
| 766 "/=" { XBIN_OP_RETURN (DIV_EQ, false); } | |
| 767 "\\=" { XBIN_OP_RETURN (LEFTDIV_EQ, false); } | |
| 768 ".+=" { XBIN_OP_RETURN (ADD_EQ, false); } | |
| 769 ".-=" { XBIN_OP_RETURN (SUB_EQ, false); } | |
| 770 ".*=" { XBIN_OP_RETURN (EMUL_EQ, false); } | |
| 771 "./=" { XBIN_OP_RETURN (EDIV_EQ, false); } | |
| 772 ".\\=" { XBIN_OP_RETURN (ELEFTDIV_EQ, false); } | |
| 773 {POW}= { XBIN_OP_RETURN (POW_EQ, false); } | |
| 774 {EPOW}= { XBIN_OP_RETURN (EPOW_EQ, false); } | |
| 775 "&=" { XBIN_OP_RETURN (AND_EQ, false); } | |
| 776 "|=" { XBIN_OP_RETURN (OR_EQ, false); } | |
| 777 "<<=" { XBIN_OP_RETURN (LSHIFT_EQ, false); } | |
| 778 ">>=" { XBIN_OP_RETURN (RSHIFT_EQ, false); } | |
| 2877 | 779 |
| 4608 | 780 \{{S}* { |
| 3351 | 781 nesting_level.brace (); |
| 4608 | 782 |
| 783 current_input_column += yyleng; | |
| 784 lexer_flags.quote_is_transpose = false; | |
| 785 lexer_flags.convert_spaces_to_comma = true; | |
| 786 | |
| 3351 | 787 promptflag--; |
| 4608 | 788 eat_whitespace (); |
| 789 | |
| 4613 | 790 lexer_flags.braceflag++; |
| 4608 | 791 BEGIN (MATRIX_START); |
| 4910 | 792 COUNT_TOK_AND_RETURN ('{'); |
| 3351 | 793 } |
| 794 | |
| 795 "}" { | |
| 796 nesting_level.remove (); | |
| 797 | |
| 4608 | 798 TOK_RETURN ('}'); |
| 3351 | 799 } |
| 800 | |
| 968 | 801 %{ |
| 2066 | 802 // Unrecognized input is a lexical error. |
| 968 | 803 %} |
| 1 | 804 |
| 2042 | 805 . { |
| 4240 | 806 // EOF happens here if we are parsing nested functions. |
| 807 | |
| 4410 | 808 yyunput (yytext[0], yytext); |
| 4248 | 809 |
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810 int c = text_yyinput (); |
| 4248 | 811 |
| 812 if (c != EOF) | |
| 4240 | 813 { |
| 814 current_input_column++; | |
| 815 | |
| 816 error ("invalid character `%s' (ASCII %d) near line %d, column %d", | |
| 4248 | 817 undo_string_escape (static_cast<char> (c)), c, |
| 4240 | 818 input_line_number, current_input_column); |
| 819 | |
| 820 return LEXICAL_ERROR; | |
| 821 } | |
| 822 else | |
| 823 TOK_RETURN (END_OF_INPUT); | |
| 2066 | 824 } |
| 1 | 825 |
| 826 %% | |
| 827 | |
| 767 | 828 // GAG. |
| 829 // | |
| 830 // If we're reading a matrix and the next character is '[', make sure | |
| 831 // that we insert a comma ahead of it. | |
| 832 | |
| 146 | 833 void |
| 1 | 834 do_comma_insert_check (void) |
| 835 { | |
| 1001 | 836 int spc_gobbled = eat_continuation (); |
| 2970 | 837 |
|
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838 int c = text_yyinput (); |
| 2970 | 839 |
| 4410 | 840 yyunput (c, yytext); |
| 2970 | 841 |
| 1001 | 842 if (spc_gobbled) |
| 4410 | 843 yyunput (' ', yytext); |
| 2970 | 844 |
| 3351 | 845 lexer_flags.do_comma_insert = (lexer_flags.bracketflag && c == '['); |
| 1 | 846 } |
| 847 | |
| 767 | 848 // Fix things up for errors or interrupts. The parser is never called |
| 849 // recursively, so it is always safe to reinitialize its state before | |
| 850 // doing any parsing. | |
| 851 | |
| 1 | 852 void |
| 853 reset_parser (void) | |
| 854 { | |
| 1826 | 855 // Start off on the right foot. |
| 4323 | 856 BEGIN (INITIAL); |
| 4318 | 857 |
| 3883 | 858 parser_end_of_input = false; |
| 4238 | 859 end_tokens_expected = 0; |
| 860 | |
| 861 while (! symtab_context.empty ()) | |
| 862 symtab_context.pop (); | |
| 287 | 863 |
| 7336 | 864 symbol_table::reset_parent_scope (); |
| 865 | |
| 1826 | 866 // We do want a prompt by default. |
| 1 | 867 promptflag = 1; |
| 287 | 868 |
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869 // We are not in a block comment. |
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870 block_comment_nesting_level = 0; |
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871 |
| 3351 | 872 // Error may have occurred inside some brackets, braces, or parentheses. |
| 985 | 873 nesting_level.clear (); |
| 287 | 874 |
| 1826 | 875 // Clear out the stack of token info used to track line and column |
| 876 // numbers. | |
| 143 | 877 while (! token_stack.empty ()) |
| 4214 | 878 { |
| 879 delete token_stack.top (); | |
| 880 token_stack.pop (); | |
| 881 } | |
| 287 | 882 |
| 1826 | 883 // Can be reset by defining a function. |
| 985 | 884 if (! (reading_script_file || reading_fcn_file)) |
| 885 { | |
| 886 current_input_column = 1; | |
| 2926 | 887 input_line_number = command_editor::current_command_number () - 1; |
| 985 | 888 } |
| 287 | 889 |
| 1826 | 890 // Only ask for input from stdin if we are expecting interactive |
| 891 // input. | |
| 3174 | 892 if ((interactive || forced_interactive) |
| 3880 | 893 && ! (reading_fcn_file |
| 894 || reading_script_file | |
| 895 || get_input_from_eval_string | |
| 3174 | 896 || input_from_startup_file)) |
| 287 | 897 yyrestart (stdin); |
| 991 | 898 |
| 1826 | 899 // Clear the buffer for help text. |
| 4426 | 900 while (! help_buf.empty ()) |
| 901 help_buf.pop (); | |
| 1755 | 902 |
| 1826 | 903 // Reset other flags. |
| 904 lexer_flags.init (); | |
| 1 | 905 } |
| 906 | |
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907 static int |
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908 text_yyinput (void) |
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909 { |
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910 int c = yyinput (); |
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911 |
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912 // Convert CRLF into just LF and single CR into LF. |
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913 |
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914 if (c == '\r') |
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915 { |
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916 c = yyinput (); |
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917 |
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918 if (c != '\n') |
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919 { |
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920 yyunput (c, yytext); |
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921 c = '\n'; |
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922 } |
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923 } |
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924 |
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925 return c; |
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926 } |
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927 |
| 767 | 928 // If we read some newlines, we need figure out what column we're |
| 929 // really looking at. | |
| 930 | |
| 1 | 931 static void |
| 932 fixup_column_count (char *s) | |
| 933 { | |
| 934 char c; | |
| 935 while ((c = *s++) != '\0') | |
| 936 { | |
| 937 if (c == '\n') | |
| 143 | 938 current_input_column = 1; |
| 1 | 939 else |
| 940 current_input_column++; | |
| 941 } | |
| 942 } | |
| 943 | |
| 767 | 944 // Include these so that we don't have to link to libfl.a. |
| 246 | 945 |
| 3332 | 946 int |
| 1 | 947 yywrap (void) |
| 948 { | |
| 287 | 949 return 1; |
| 1 | 950 } |
| 951 | |
| 767 | 952 // Tell us all what the current buffer is. |
| 953 | |
| 1 | 954 YY_BUFFER_STATE |
| 955 current_buffer (void) | |
| 956 { | |
| 957 return YY_CURRENT_BUFFER; | |
| 958 } | |
| 959 | |
| 767 | 960 // Create a new buffer. |
| 961 | |
| 1 | 962 YY_BUFFER_STATE |
| 963 create_buffer (FILE *f) | |
| 964 { | |
| 965 return yy_create_buffer (f, YY_BUF_SIZE); | |
| 966 } | |
| 967 | |
| 767 | 968 // Start reading a new buffer. |
| 969 | |
| 1 | 970 void |
| 971 switch_to_buffer (YY_BUFFER_STATE buf) | |
| 972 { | |
| 973 yy_switch_to_buffer (buf); | |
| 974 } | |
| 975 | |
| 767 | 976 // Delete a buffer. |
| 977 | |
| 1 | 978 void |
| 979 delete_buffer (YY_BUFFER_STATE buf) | |
| 980 { | |
| 981 yy_delete_buffer (buf); | |
| 982 } | |
| 983 | |
| 767 | 984 // Restore a buffer (for unwind-prot). |
| 985 | |
| 1 | 986 void |
| 987 restore_input_buffer (void *buf) | |
| 988 { | |
| 2861 | 989 switch_to_buffer (static_cast<YY_BUFFER_STATE> (buf)); |
| 1 | 990 } |
| 991 | |
| 767 | 992 // Delete a buffer (for unwind-prot). |
| 993 | |
| 1 | 994 void |
| 995 delete_input_buffer (void *buf) | |
| 996 { | |
| 2861 | 997 delete_buffer (static_cast<YY_BUFFER_STATE> (buf)); |
| 1 | 998 } |
| 999 | |
| 4238 | 1000 static void |
| 1001 prep_for_function (void) | |
| 1002 { | |
| 1003 end_tokens_expected++; | |
| 1004 | |
| 1005 promptflag--; | |
| 1006 | |
| 1007 lexer_flags.defining_func = true; | |
| 1008 lexer_flags.parsed_function_name = false; | |
| 1009 | |
| 1010 if (! (reading_fcn_file || reading_script_file)) | |
| 1011 input_line_number = 1; | |
| 1012 } | |
| 1013 | |
| 1014 static void | |
| 1015 prep_for_nested_function (void) | |
| 1016 { | |
| 4240 | 1017 lexer_flags.parsing_nested_function = 1; |
| 4426 | 1018 help_buf.push (std::string ()); |
| 4238 | 1019 prep_for_function (); |
| 4240 | 1020 // We're still only expecting one end token for this set of functions. |
| 1021 end_tokens_expected--; | |
| 4238 | 1022 yylval.tok_val = new token (input_line_number, current_input_column); |
| 1023 token_stack.push (yylval.tok_val); | |
| 1024 } | |
| 1025 | |
| 1026 // Handle keywords. Return -1 if the keyword should be ignored. | |
| 767 | 1027 |
| 1 | 1028 static int |
| 4867 | 1029 is_keyword_token (const std::string& s) |
| 1 | 1030 { |
| 3805 | 1031 int l = input_line_number; |
| 1032 int c = current_input_column; | |
| 1033 | |
| 1823 | 1034 int len = s.length (); |
| 922 | 1035 |
| 5088 | 1036 const octave_kw *kw = octave_kw_hash::in_word_set (s.c_str (), len); |
| 191 | 1037 |
| 1497 | 1038 if (kw) |
| 143 | 1039 { |
| 1497 | 1040 yylval.tok_val = 0; |
| 1041 | |
| 1042 switch (kw->kw_id) | |
| 1043 { | |
| 1044 case break_kw: | |
| 2764 | 1045 case case_kw: |
| 1497 | 1046 case catch_kw: |
| 1047 case continue_kw: | |
| 1048 case else_kw: | |
| 1049 case elseif_kw: | |
| 1050 case global_kw: | |
| 2764 | 1051 case otherwise_kw: |
| 1497 | 1052 case return_kw: |
| 2846 | 1053 case static_kw: |
| 3484 | 1054 case until_kw: |
| 1497 | 1055 case unwind_protect_cleanup_kw: |
| 1056 break; | |
| 1057 | |
| 1058 case end_kw: | |
| 4234 | 1059 if (lexer_flags.looking_at_object_index) |
| 1060 return 0; | |
| 1061 else | |
| 4238 | 1062 { |
| 1063 if (reading_fcn_file && end_tokens_expected == 1) | |
| 1064 return -1; | |
| 1065 else | |
| 1066 { | |
| 1067 yylval.tok_val = new token (token::simple_end, l, c); | |
| 1068 end_tokens_expected--; | |
| 1069 } | |
| 1070 } | |
| 1497 | 1071 break; |
| 1072 | |
| 1073 case end_try_catch_kw: | |
| 4238 | 1074 end_tokens_expected--; |
| 1497 | 1075 yylval.tok_val = new token (token::try_catch_end, l, c); |
| 1076 break; | |
| 1077 | |
| 1078 case end_unwind_protect_kw: | |
| 4238 | 1079 end_tokens_expected--; |
| 1497 | 1080 yylval.tok_val = new token (token::unwind_protect_end, l, c); |
| 1081 break; | |
| 1082 | |
| 1083 case endfor_kw: | |
| 4238 | 1084 end_tokens_expected--; |
| 1497 | 1085 yylval.tok_val = new token (token::for_end, l, c); |
| 1086 break; | |
| 1087 | |
| 1088 case endfunction_kw: | |
| 4238 | 1089 { |
| 1090 if (reading_fcn_file && end_tokens_expected == 1) | |
| 1091 return -1; | |
| 1092 else | |
| 1093 { | |
| 1094 yylval.tok_val = new token (token::function_end, l, c); | |
| 1095 end_tokens_expected--; | |
| 1096 } | |
| 1097 } | |
| 1497 | 1098 break; |
| 1099 | |
| 1100 case endif_kw: | |
| 4238 | 1101 end_tokens_expected--; |
| 1497 | 1102 yylval.tok_val = new token (token::if_end, l, c); |
| 1103 break; | |
| 1104 | |
| 2764 | 1105 case endswitch_kw: |
| 4238 | 1106 end_tokens_expected--; |
| 2764 | 1107 yylval.tok_val = new token (token::switch_end, l, c); |
| 1108 break; | |
| 1109 | |
| 1497 | 1110 case endwhile_kw: |
| 4238 | 1111 end_tokens_expected--; |
| 1497 | 1112 yylval.tok_val = new token (token::while_end, l, c); |
| 1113 break; | |
| 1114 | |
| 1115 case for_kw: | |
| 1116 case while_kw: | |
| 4238 | 1117 end_tokens_expected++; |
| 1118 // Fall through... | |
| 1119 | |
| 1120 case do_kw: | |
| 1497 | 1121 promptflag--; |
| 1826 | 1122 lexer_flags.looping++; |
| 1497 | 1123 break; |
| 1124 | |
| 1125 case if_kw: | |
| 1126 case try_kw: | |
| 2764 | 1127 case switch_kw: |
| 1497 | 1128 case unwind_protect_kw: |
| 4238 | 1129 end_tokens_expected++; |
| 1497 | 1130 promptflag--; |
| 1131 break; | |
| 1132 | |
| 1133 case function_kw: | |
| 4238 | 1134 { |
| 1135 if (lexer_flags.defining_func) | |
| 1136 { | |
| 1137 if (reading_fcn_file) | |
| 1138 { | |
| 1139 if (lexer_flags.parsing_nested_function) | |
| 1140 { | |
| 4323 | 1141 BEGIN (NESTED_FUNCTION_END); |
| 4240 | 1142 |
| 4238 | 1143 yylval.tok_val = new token (token::function_end, l, c); |
| 4240 | 1144 token_stack.push (yylval.tok_val); |
| 1145 | |
| 1146 return END; | |
| 4238 | 1147 } |
| 1148 else | |
| 1149 { | |
| 1150 prep_for_nested_function (); | |
| 4240 | 1151 |
| 4238 | 1152 return FCN; |
| 1153 } | |
| 1154 } | |
| 1155 else | |
| 1156 { | |
| 1157 error ("nested functions not implemented in this context"); | |
| 1158 | |
| 1159 if ((reading_fcn_file || reading_script_file) | |
| 1160 && ! curr_fcn_file_name.empty ()) | |
| 1161 error ("near line %d of file `%s.m'", | |
| 1162 input_line_number, curr_fcn_file_name.c_str ()); | |
| 1163 else | |
| 1164 error ("near line %d", input_line_number); | |
| 1165 | |
| 1166 return LEXICAL_ERROR; | |
| 1167 } | |
| 1168 } | |
| 1169 else | |
| 1170 prep_for_function (); | |
| 1171 } | |
| 1497 | 1172 break; |
| 1173 | |
| 3174 | 1174 case magic_file_kw: |
| 1175 { | |
| 1176 if ((reading_fcn_file || reading_script_file) | |
| 1177 && ! curr_fcn_file_full_name.empty ()) | |
| 1178 yylval.tok_val = new token (curr_fcn_file_full_name, l, c); | |
| 1179 else | |
| 1180 yylval.tok_val = new token ("stdin", l, c); | |
| 1181 } | |
| 1182 break; | |
| 1183 | |
| 1184 case magic_line_kw: | |
| 1185 yylval.tok_val = new token (static_cast<double> (l), "", l, c); | |
| 1186 break; | |
| 1187 | |
| 1497 | 1188 default: |
| 1189 panic_impossible (); | |
| 1190 } | |
| 1191 | |
| 1192 if (! yylval.tok_val) | |
| 1193 yylval.tok_val = new token (l, c); | |
| 1194 | |
| 476 | 1195 token_stack.push (yylval.tok_val); |
| 1497 | 1196 |
| 1197 return kw->tok; | |
| 143 | 1198 } |
| 1 | 1199 |
| 1200 return 0; | |
| 1201 } | |
| 1202 | |
| 2702 | 1203 static bool |
| 3523 | 1204 is_variable (const std::string& name) |
| 2702 | 1205 { |
| 7336 | 1206 return symbol_table::is_variable (name); |
| 2702 | 1207 } |
| 1208 | |
| 1209 static void | |
| 3523 | 1210 force_local_variable (const std::string& name) |
| 2702 | 1211 { |
| 7336 | 1212 octave_value& val = symbol_table::varref (name); |
| 1213 | |
| 1214 if (! val.is_defined ()) | |
| 1215 val = Matrix (); | |
| 2702 | 1216 } |
| 1217 | |
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1218 static std::string |
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1219 grab_block_comment (stream_reader& reader, bool& eof) |
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1220 { |
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1221 std::string buf; |
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1222 |
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1223 bool at_bol = true; |
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1224 bool look_for_marker = false; |
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1225 |
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1226 bool warned_incompatible = false; |
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1227 |
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1228 int c = 0; |
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1229 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1230 while ((c = reader.getc ()) != EOF) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1231 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1232 current_input_column++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1233 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1234 if (look_for_marker) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1235 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1236 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1237 look_for_marker = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1238 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1239 if (c == '{' || c == '}') |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1240 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1241 std::string tmp_buf (1, static_cast<char> (c)); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1242 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1243 int type = c; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1244 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1245 bool done = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1246 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1247 while ((c = reader.getc ()) != EOF && ! done) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1248 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1249 current_input_column++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1250 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1251 switch (c) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1252 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1253 case ' ': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1254 case '\t': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1255 tmp_buf += static_cast<char> (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1256 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1257 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1258 case '\n': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1259 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1260 current_input_column = 0; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1261 at_bol = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1262 done = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1263 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1264 if (type == '{') |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1265 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1266 block_comment_nesting_level++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1267 promptflag--; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1268 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1269 else |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1270 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1271 block_comment_nesting_level--; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1272 promptflag++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1273 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1274 if (block_comment_nesting_level == 0) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1275 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1276 buf += grab_comment_block (reader, true, eof); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1277 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1278 return buf; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1279 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1280 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1281 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1282 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1283 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1284 default: |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1285 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1286 tmp_buf += static_cast<char> (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1287 buf += tmp_buf; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1288 done = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1289 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1290 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1291 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1292 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1293 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1294 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1295 if (at_bol && c == '%' || c == '#') |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1296 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1297 if (c == '#' && ! warned_incompatible) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1298 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1299 warned_incompatible = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1300 maybe_gripe_matlab_incompatible_comment (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1301 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1302 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1303 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1304 look_for_marker = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1305 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1306 else |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1307 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1308 buf += static_cast<char> (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1309 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1310 if (c == '\n') |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1311 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1312 current_input_column = 0; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1313 at_bol = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1314 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1315 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1316 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1317 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1318 if (c == EOF) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1319 eof = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1320 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1321 return buf; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1322 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1323 |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1324 std::string |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1325 grab_comment_block (stream_reader& reader, bool at_bol, |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1326 bool& eof) |
| 1 | 1327 { |
| 4426 | 1328 std::string buf; |
| 1019 | 1329 |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1330 // TRUE means we are at the beginning of a comment block. |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1331 bool begin_comment = false; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1332 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1333 // TRUE means we are currently reading a comment block. |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1334 bool in_comment = false; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1335 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1336 bool warned_incompatible = false; |
| 3665 | 1337 |
| 1019 | 1338 int c = 0; |
| 1 | 1339 |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1340 while ((c = reader.getc ()) != EOF) |
| 1019 | 1341 { |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1342 current_input_column++; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1343 |
| 2300 | 1344 if (begin_comment) |
| 1345 { | |
| 1346 if (c == '%' || c == '#') | |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1347 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1348 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1349 continue; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1350 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1351 else if (at_bol && c == '{') |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1352 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1353 std::string tmp_buf (1, static_cast<char> (c)); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1354 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1355 bool done = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1356 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1357 while ((c = reader.getc ()) != EOF && ! done) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1358 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1359 current_input_column++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1360 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1361 switch (c) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1362 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1363 case ' ': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1364 case '\t': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1365 tmp_buf += static_cast<char> (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1366 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1367 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1368 case '\n': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1369 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1370 current_input_column = 0; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1371 at_bol = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1372 done = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1373 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1374 block_comment_nesting_level++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1375 promptflag--; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1376 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1377 buf += grab_block_comment (reader, eof); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1378 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1379 in_comment = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1380 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1381 if (eof) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1382 goto done; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1383 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1384 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1385 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1386 default: |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1387 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1388 tmp_buf += static_cast<char> (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1389 buf += tmp_buf; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1390 done = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1391 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1392 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1393 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1394 } |
| 2300 | 1395 else |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1396 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1397 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1398 begin_comment = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1399 } |
| 2300 | 1400 } |
| 1401 | |
| 1019 | 1402 if (in_comment) |
| 1 | 1403 { |
| 4426 | 1404 buf += static_cast<char> (c); |
| 1755 | 1405 |
| 1019 | 1406 if (c == '\n') |
| 3427 | 1407 { |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1408 at_bol = true; |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1409 current_input_column = 0; |
| 3427 | 1410 in_comment = false; |
| 1411 } | |
| 1019 | 1412 } |
| 1413 else | |
| 1414 { | |
| 1415 switch (c) | |
| 991 | 1416 { |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1417 case ' ': |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1418 case '\t': |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1419 break; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1420 |
| 4037 | 1421 case '#': |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1422 if (! warned_incompatible) |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1423 { |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1424 warned_incompatible = true; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1425 maybe_gripe_matlab_incompatible_comment (c); |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1426 } |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1427 // fall through... |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1428 |
| 1019 | 1429 case '%': |
| 2300 | 1430 in_comment = true; |
| 1431 begin_comment = true; | |
| 1019 | 1432 break; |
| 777 | 1433 |
| 1019 | 1434 default: |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1435 current_input_column--; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1436 reader.ungetc (c); |
| 1019 | 1437 goto done; |
| 1 | 1438 } |
| 1439 } | |
| 1019 | 1440 } |
| 991 | 1441 |
| 1019 | 1442 done: |
| 991 | 1443 |
|
7715
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1444 if (c == EOF) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1445 eof = true; |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1446 |
| 4426 | 1447 return buf; |
| 1 | 1448 } |
| 1449 | |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1450 class |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1451 flex_stream_reader : public stream_reader |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1452 { |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1453 public: |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1454 flex_stream_reader (char *buf_arg) : stream_reader (), buf (buf_arg) { } |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1455 |
|
7728
13820b9f5fd9
more consistent handling of CR/CRLF/LF line endings in lexer and parser
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
1456 int getc (void) { return ::text_yyinput (); } |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1457 int ungetc (int c) { ::yyunput (c, buf); return 0; } |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1458 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1459 private: |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1460 char *buf; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1461 }; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1462 |
|
7715
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1463 static int |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1464 process_comment (bool start_in_block, bool& eof) |
|
7715
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1465 { |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1466 eof = false; |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1467 |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1468 std::string help_txt; |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1469 |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1470 if (! help_buf.empty ()) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1471 help_txt = help_buf.top (); |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1472 |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1473 flex_stream_reader flex_reader (yytext); |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1474 |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1475 // process_comment is only supposed to be called when we are not |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1476 // initially looking at a block comment. |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1477 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1478 std::string txt = start_in_block |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1479 ? grab_block_comment (flex_reader, eof) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1480 : grab_comment_block (flex_reader, false, eof); |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1481 |
|
7715
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1482 if (help_txt.empty () && nesting_level.none ()) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1483 { |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1484 if (! help_buf.empty ()) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1485 help_buf.pop (); |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1486 |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1487 help_buf.push (txt); |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1488 } |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1489 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1490 octave_comment_buffer::append (txt); |
|
7715
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1491 |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1492 current_input_column = 1; |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1493 lexer_flags.quote_is_transpose = false; |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1494 lexer_flags.convert_spaces_to_comma = true; |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1495 |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1496 if (YY_START == COMMAND_START) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1497 BEGIN (INITIAL); |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1498 |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1499 if (nesting_level.none ()) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1500 { |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1501 lexer_flags.doing_rawcommand = false; |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1502 return '\n'; |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1503 } |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1504 else if (nesting_level.is_bracket_or_brace ()) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1505 return ';'; |
|
5b4d278ec828
parse scripts completely before executing
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1506 else |
|
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|
1507 return 0; |
|
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|
1508 } |
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|
1509 |
| 767 | 1510 // Return 1 if the given character matches any character in the given |
| 1511 // string. | |
| 1512 | |
| 2857 | 1513 static bool |
| 2804 | 1514 match_any (char c, const char *s) |
| 1 | 1515 { |
| 1516 char tmp; | |
| 1517 while ((tmp = *s++) != '\0') | |
| 1518 { | |
| 1519 if (c == tmp) | |
| 2857 | 1520 return true; |
| 1 | 1521 } |
| 2857 | 1522 return false; |
| 1 | 1523 } |
| 1524 | |
| 767 | 1525 // Given information about the spacing surrounding an operator, |
| 1526 // return 1 if it looks like it should be treated as a binary | |
| 1527 // operator. For example, | |
| 1528 // | |
| 3774 | 1529 // [ 1 + 2 ] or [ 1+ 2] or [ 1+2 ] ==> binary |
| 1530 // | |
| 1531 // [ 1 +2 ] ==> unary | |
| 767 | 1532 |
| 2857 | 1533 static bool |
| 3246 | 1534 looks_like_bin_op (bool spc_prev, int next_char) |
| 1 | 1535 { |
| 3246 | 1536 bool spc_next = (next_char == ' ' || next_char == '\t'); |
| 1537 | |
| 608 | 1538 return ((spc_prev && spc_next) || ! spc_prev); |
| 1 | 1539 } |
| 1540 | |
| 3263 | 1541 // Recognize separators. If the separator is a CRLF pair, it is |
| 1542 // replaced by a single LF. | |
| 1543 | |
| 1544 static bool | |
| 1545 next_token_is_sep_op (void) | |
| 1546 { | |
| 1547 bool retval = false; | |
| 1548 | |
|
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1549 int c = text_yyinput (); |
|
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1550 |
|
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1551 retval = match_any (c, ",;\n]"); |
|
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|
1552 |
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|
1553 yyunput (c, yytext); |
| 3263 | 1554 |
| 1555 return retval; | |
| 1556 } | |
| 1557 | |
| 767 | 1558 // Try to determine if the next token should be treated as a postfix |
| 1559 // unary operator. This is ugly, but it seems to do the right thing. | |
| 1560 | |
| 2857 | 1561 static bool |
| 3246 | 1562 next_token_is_postfix_unary_op (bool spc_prev) |
| 1 | 1563 { |
| 2857 | 1564 bool un_op = false; |
| 1 | 1565 |
|
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1566 int c0 = text_yyinput (); |
| 1 | 1567 |
| 3246 | 1568 if (c0 == '\'' && ! spc_prev) |
| 1569 { | |
| 1570 un_op = true; | |
| 1571 } | |
| 1572 else if (c0 == '.') | |
| 1573 { | |
|
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|
1574 int c1 = text_yyinput (); |
| 3246 | 1575 un_op = (c1 == '\''); |
| 4410 | 1576 yyunput (c1, yytext); |
| 3246 | 1577 } |
| 4613 | 1578 else if (c0 == '+') |
| 1579 { | |
|
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1580 int c1 = text_yyinput (); |
| 4613 | 1581 un_op = (c1 == '+'); |
| 1582 yyunput (c1, yytext); | |
| 1583 } | |
| 1584 else if (c0 == '-') | |
| 1585 { | |
|
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1586 int c1 = text_yyinput (); |
| 4613 | 1587 un_op = (c1 == '-'); |
| 1588 yyunput (c1, yytext); | |
| 1589 } | |
| 1 | 1590 |
| 4410 | 1591 yyunput (c0, yytext); |
| 1 | 1592 |
| 1593 return un_op; | |
| 1594 } | |
| 1595 | |
| 767 | 1596 // Try to determine if the next token should be treated as a binary |
| 3246 | 1597 // operator. |
| 1521 | 1598 // |
| 3246 | 1599 // This kluge exists because whitespace is not always ignored inside |
| 3774 | 1600 // the square brackets that are used to create matrix objects (though |
| 1601 // spacing only really matters in the cases that can be interpreted | |
| 1602 // either as binary ops or prefix unary ops: currently just +, -). | |
| 1603 // | |
| 3779 | 1604 // Note that a line continuation directly following a + or - operator |
| 1605 // (e.g., the characters '[' 'a' ' ' '+' '\' LFD 'b' ']') will be | |
| 1606 // parsed as a binary operator. | |
| 767 | 1607 |
| 2857 | 1608 static bool |
| 3246 | 1609 next_token_is_bin_op (bool spc_prev) |
| 1 | 1610 { |
| 2857 | 1611 bool bin_op = false; |
| 1 | 1612 |
|
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|
1613 int c0 = text_yyinput (); |
| 1 | 1614 |
| 1615 switch (c0) | |
| 1616 { | |
| 777 | 1617 case '+': |
| 1618 case '-': | |
| 3774 | 1619 { |
|
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1620 int c1 = text_yyinput (); |
| 3774 | 1621 |
| 1622 switch (c1) | |
| 1623 { | |
| 1624 case '+': | |
| 1625 case '-': | |
| 1626 // Unary ops, spacing doesn't matter. | |
| 1627 break; | |
| 1628 | |
| 1629 case '=': | |
| 1630 // Binary ops, spacing doesn't matter. | |
| 1631 bin_op = true; | |
| 1632 break; | |
| 1633 | |
| 1634 default: | |
| 1635 // Could be either, spacing matters. | |
| 1636 bin_op = looks_like_bin_op (spc_prev, c1); | |
| 1637 break; | |
| 1638 } | |
| 1639 | |
| 4410 | 1640 yyunput (c1, yytext); |
| 3774 | 1641 } |
| 1642 break; | |
| 1643 | |
| 1644 case ':': | |
| 3246 | 1645 case '/': |
| 1646 case '\\': | |
| 1647 case '^': | |
| 3774 | 1648 // Always a binary op (may also include /=, \=, and ^=). |
| 1649 bin_op = true; | |
| 1276 | 1650 break; |
| 1651 | |
| 3246 | 1652 // .+ .- ./ .\ .^ .* .** |
| 1554 | 1653 case '.': |
| 1654 { | |
|
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1655 int c1 = text_yyinput (); |
| 3246 | 1656 |
| 3774 | 1657 if (match_any (c1, "+-/\\^*")) |
| 1658 // Always a binary op (may also include .+=, .-=, ./=, ...). | |
| 1659 bin_op = true; | |
| 3698 | 1660 else if (! isdigit (c1) && c1 != ' ' && c1 != '\t' && c1 != '.') |
| 3774 | 1661 // A structure element reference is a binary op. |
| 1662 bin_op = true; | |
| 3246 | 1663 |
| 4410 | 1664 yyunput (c1, yytext); |
| 1554 | 1665 } |
| 1666 break; | |
| 1667 | |
| 3246 | 1668 // = == & && | || * ** |
| 1669 case '=': | |
| 1 | 1670 case '&': |
| 3246 | 1671 case '|': |
| 1 | 1672 case '*': |
| 3774 | 1673 // Always a binary op (may also include ==, &&, ||, **). |
| 1674 bin_op = true; | |
| 3246 | 1675 break; |
| 1676 | |
| 3774 | 1677 // < <= <> > >= |
| 1 | 1678 case '<': |
| 1679 case '>': | |
| 3774 | 1680 // Always a binary op (may also include <=, <>, >=). |
| 1681 bin_op = true; | |
| 1682 break; | |
| 1683 | |
| 1684 // ~= != | |
| 777 | 1685 case '~': |
| 1686 case '!': | |
| 3246 | 1687 { |
|
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1688 int c1 = text_yyinput (); |
| 3246 | 1689 |
| 3774 | 1690 // ~ and ! can be unary ops, so require following =. |
| 1691 if (c1 == '=') | |
| 1692 bin_op = true; | |
| 3246 | 1693 |
| 4410 | 1694 yyunput (c1, yytext); |
| 3246 | 1695 } |
| 1 | 1696 break; |
| 1697 | |
| 1698 default: | |
| 1276 | 1699 break; |
| 1 | 1700 } |
| 1701 | |
| 4410 | 1702 yyunput (c0, yytext); |
| 1 | 1703 |
| 1704 return bin_op; | |
| 1705 } | |
| 1706 | |
| 767 | 1707 // Used to delete trailing white space from tokens. |
| 1708 | |
| 3536 | 1709 static std::string |
| 1 | 1710 strip_trailing_whitespace (char *s) |
| 1711 { | |
| 3523 | 1712 std::string retval = s; |
| 1 | 1713 |
| 1823 | 1714 size_t pos = retval.find_first_of (" \t"); |
| 1 | 1715 |
| 1823 | 1716 if (pos != NPOS) |
| 1717 retval.resize (pos); | |
| 1 | 1718 |
| 1719 return retval; | |
| 1720 } | |
| 1721 | |
|
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1722 // FIXME -- we need to handle block comments here. |
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1723 |
| 3665 | 1724 static void |
| 1725 scan_for_comments (const char *text) | |
| 1726 { | |
| 1727 std::string comment_buf; | |
| 1728 | |
| 1729 bool in_comment = false; | |
| 1730 bool beginning_of_comment = false; | |
| 1731 | |
| 1732 int len = strlen (text); | |
| 1733 int i = 0; | |
| 1734 | |
| 1735 while (i < len) | |
| 1736 { | |
| 1737 char c = text[i++]; | |
| 1738 | |
| 1739 switch (c) | |
| 1740 { | |
| 1741 case '%': | |
| 1742 case '#': | |
| 1743 if (in_comment) | |
| 1744 { | |
| 1745 if (! beginning_of_comment) | |
| 3802 | 1746 comment_buf += static_cast<char> (c); |
| 3665 | 1747 } |
| 1748 else | |
| 1749 { | |
| 4037 | 1750 maybe_gripe_matlab_incompatible_comment (c); |
| 3665 | 1751 in_comment = true; |
| 1752 beginning_of_comment = true; | |
| 1753 } | |
| 1754 break; | |
| 1755 | |
| 1756 case '\n': | |
| 1757 if (in_comment) | |
| 1758 { | |
| 3802 | 1759 comment_buf += static_cast<char> (c); |
| 3665 | 1760 octave_comment_buffer::append (comment_buf); |
| 1761 comment_buf.resize (0); | |
| 1762 in_comment = false; | |
| 1763 beginning_of_comment = false; | |
| 1764 } | |
| 1765 break; | |
| 1766 | |
| 1767 default: | |
| 1768 if (in_comment) | |
| 1769 { | |
| 3802 | 1770 comment_buf += static_cast<char> (c); |
| 3665 | 1771 beginning_of_comment = false; |
| 1772 } | |
| 1773 break; | |
| 1774 } | |
| 1775 } | |
| 1776 | |
| 1777 if (! comment_buf.empty ()) | |
| 1778 octave_comment_buffer::append (comment_buf); | |
| 1779 } | |
| 1780 | |
| 1001 | 1781 // Discard whitespace, including comments and continuations. |
| 1088 | 1782 // |
| 1783 // Return value is logical OR of the following values: | |
| 1784 // | |
| 1826 | 1785 // ATE_NOTHING : no spaces to eat |
| 1088 | 1786 // ATE_SPACE_OR_TAB : space or tab in input |
| 1787 // ATE_NEWLINE : bare new line in input | |
| 1001 | 1788 |
|
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1789 // FIXME -- we need to handle block comments here. |
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|
1790 |
| 1826 | 1791 static yum_yum |
| 975 | 1792 eat_whitespace (void) |
| 1793 { | |
| 1826 | 1794 yum_yum retval = ATE_NOTHING; |
| 3665 | 1795 |
| 1796 std::string comment_buf; | |
| 1797 | |
| 2857 | 1798 bool in_comment = false; |
| 3665 | 1799 bool beginning_of_comment = false; |
| 1800 | |
| 1801 int c = 0; | |
| 1802 | |
|
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1803 while ((c = text_yyinput ()) != EOF) |
| 975 | 1804 { |
| 1805 current_input_column++; | |
| 1806 | |
| 1807 switch (c) | |
| 1808 { | |
| 1809 case ' ': | |
| 1810 case '\t': | |
| 3665 | 1811 if (in_comment) |
| 1812 { | |
| 3802 | 1813 comment_buf += static_cast<char> (c); |
| 3665 | 1814 beginning_of_comment = false; |
| 1815 } | |
| 1088 | 1816 retval |= ATE_SPACE_OR_TAB; |
| 975 | 1817 break; |
| 1818 | |
| 1819 case '\n': | |
| 1088 | 1820 retval |= ATE_NEWLINE; |
| 3665 | 1821 if (in_comment) |
| 1822 { | |
| 3802 | 1823 comment_buf += static_cast<char> (c); |
| 3665 | 1824 octave_comment_buffer::append (comment_buf); |
| 1825 comment_buf.resize (0); | |
| 1826 in_comment = false; | |
| 1827 beginning_of_comment = false; | |
| 1828 } | |
| 975 | 1829 current_input_column = 0; |
| 1830 break; | |
| 1831 | |
| 1832 case '#': | |
| 1833 case '%': | |
| 3665 | 1834 if (in_comment) |
| 1835 { | |
| 1836 if (! beginning_of_comment) | |
| 3802 | 1837 comment_buf += static_cast<char> (c); |
| 3665 | 1838 } |
| 1839 else | |
| 1840 { | |
| 4037 | 1841 maybe_gripe_matlab_incompatible_comment (c); |
| 3665 | 1842 in_comment = true; |
| 1843 beginning_of_comment = true; | |
| 1844 } | |
| 975 | 1845 break; |
| 1846 | |
| 1001 | 1847 case '.': |
| 1848 if (in_comment) | |
| 3665 | 1849 { |
| 3802 | 1850 comment_buf += static_cast<char> (c); |
| 3665 | 1851 beginning_of_comment = false; |
| 1852 break; | |
| 1853 } | |
| 1001 | 1854 else |
| 1855 { | |
| 1856 if (have_ellipsis_continuation ()) | |
| 1857 break; | |
| 1858 else | |
| 1859 goto done; | |
| 1860 } | |
| 1861 | |
| 1862 case '\\': | |
| 1863 if (in_comment) | |
| 3665 | 1864 { |
| 3802 | 1865 comment_buf += static_cast<char> (c); |
| 3665 | 1866 beginning_of_comment = false; |
| 1867 break; | |
| 1868 } | |
| 1001 | 1869 else |
| 1870 { | |
| 3105 | 1871 if (have_continuation ()) |
| 1001 | 1872 break; |
| 1873 else | |
| 1874 goto done; | |
| 1875 } | |
| 1876 | |
| 975 | 1877 default: |
| 1878 if (in_comment) | |
| 3665 | 1879 { |
| 3802 | 1880 comment_buf += static_cast<char> (c); |
| 3665 | 1881 beginning_of_comment = false; |
| 1882 break; | |
| 1883 } | |
| 975 | 1884 else |
| 1885 goto done; | |
| 1886 } | |
| 1887 } | |
| 1888 | |
| 3665 | 1889 if (! comment_buf.empty ()) |
| 1890 octave_comment_buffer::append (comment_buf); | |
| 1891 | |
| 975 | 1892 done: |
| 4410 | 1893 yyunput (c, yytext); |
| 1082 | 1894 current_input_column--; |
| 1001 | 1895 return retval; |
| 975 | 1896 } |
| 1897 | |
| 3220 | 1898 static inline bool |
| 1899 looks_like_hex (const char *s, int len) | |
| 1900 { | |
| 1901 return (len > 2 && s[0] == '0' && (s[1] == 'x' || s[1] == 'X')); | |
| 1902 } | |
| 1903 | |
| 975 | 1904 static void |
| 3246 | 1905 handle_number (void) |
| 972 | 1906 { |
| 3220 | 1907 double value = 0.0; |
| 1908 int nread = 0; | |
| 1909 | |
| 3598 | 1910 if (looks_like_hex (yytext, strlen (yytext))) |
| 3220 | 1911 { |
| 1912 unsigned long ival; | |
| 3598 | 1913 |
| 1914 nread = sscanf (yytext, "%lx", &ival); | |
| 1915 | |
| 3220 | 1916 value = static_cast<double> (ival); |
| 1917 } | |
| 1918 else | |
| 3598 | 1919 { |
| 1920 char *tmp = strsave (yytext); | |
| 1921 | |
| 1922 char *idx = strpbrk (tmp, "Dd"); | |
| 2621 | 1923 |
| 3598 | 1924 if (idx) |
| 1925 *idx = 'e'; | |
| 1926 | |
| 1927 nread = sscanf (tmp, "%lf", &value); | |
| 1928 | |
| 1929 delete [] tmp; | |
| 1930 } | |
| 972 | 1931 |
| 1826 | 1932 // If yytext doesn't contain a valid number, we are in deep doo doo. |
| 985 | 1933 |
| 972 | 1934 assert (nread == 1); |
| 1935 | |
| 3988 | 1936 lexer_flags.quote_is_transpose = true; |
| 1937 lexer_flags.convert_spaces_to_comma = true; | |
| 972 | 1938 |
| 1939 yylval.tok_val = new token (value, yytext, input_line_number, | |
| 1940 current_input_column); | |
| 1941 | |
| 1942 token_stack.push (yylval.tok_val); | |
| 1943 | |
| 1944 current_input_column += yyleng; | |
| 1945 | |
| 1946 do_comma_insert_check (); | |
| 1947 } | |
| 1948 | |
| 1001 | 1949 // We have seen a backslash and need to find out if it should be |
| 1950 // treated as a continuation character. If so, this eats it, up to | |
| 1951 // and including the new line character. | |
| 1952 // | |
| 973 | 1953 // Match whitespace only, followed by a comment character or newline. |
| 1954 // Once a comment character is found, discard all input until newline. | |
| 1955 // If non-whitespace characters are found before comment | |
| 1956 // characters, return 0. Otherwise, return 1. | |
| 1957 | |
|
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1958 // FIXME -- we need to handle block comments here. |
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|
1959 |
| 2857 | 1960 static bool |
| 3096 | 1961 have_continuation (bool trailing_comments_ok) |
| 973 | 1962 { |
| 5765 | 1963 std::ostringstream buf; |
| 973 | 1964 |
| 3665 | 1965 std::string comment_buf; |
| 1966 | |
| 2857 | 1967 bool in_comment = false; |
| 3665 | 1968 bool beginning_of_comment = false; |
| 1969 | |
| 1970 int c = 0; | |
| 1971 | |
|
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|
1972 while ((c = text_yyinput ()) != EOF) |
| 973 | 1973 { |
| 3802 | 1974 buf << static_cast<char> (c); |
| 973 | 1975 |
| 1976 switch (c) | |
| 1977 { | |
| 1978 case ' ': | |
| 1979 case '\t': | |
| 3665 | 1980 if (in_comment) |
| 1981 { | |
| 3802 | 1982 comment_buf += static_cast<char> (c); |
| 3665 | 1983 beginning_of_comment = false; |
| 1984 } | |
| 973 | 1985 break; |
| 1986 | |
| 1987 case '%': | |
| 1988 case '#': | |
| 1091 | 1989 if (trailing_comments_ok) |
| 3665 | 1990 { |
| 1991 if (in_comment) | |
| 1992 { | |
| 1993 if (! beginning_of_comment) | |
| 3802 | 1994 comment_buf += static_cast<char> (c); |
| 3665 | 1995 } |
| 1996 else | |
| 1997 { | |
| 4037 | 1998 maybe_gripe_matlab_incompatible_comment (c); |
| 3665 | 1999 in_comment = true; |
| 2000 beginning_of_comment = true; | |
| 2001 } | |
| 2002 } | |
| 1091 | 2003 else |
| 2004 goto cleanup; | |
| 973 | 2005 break; |
| 2006 | |
| 2007 case '\n': | |
| 3665 | 2008 if (in_comment) |
| 2009 { | |
| 3802 | 2010 comment_buf += static_cast<char> (c); |
| 3665 | 2011 octave_comment_buffer::append (comment_buf); |
| 2012 } | |
| 975 | 2013 current_input_column = 0; |
| 1001 | 2014 promptflag--; |
| 4037 | 2015 gripe_matlab_incompatible_continuation (); |
| 2857 | 2016 return true; |
| 973 | 2017 |
| 2018 default: | |
| 3665 | 2019 if (in_comment) |
| 2020 { | |
| 3802 | 2021 comment_buf += static_cast<char> (c); |
| 3665 | 2022 beginning_of_comment = false; |
| 2023 } | |
| 2024 else | |
| 1091 | 2025 goto cleanup; |
| 2026 break; | |
| 973 | 2027 } |
| 2028 } | |
| 2029 | |
| 4410 | 2030 yyunput (c, yytext); |
| 2857 | 2031 return false; |
| 973 | 2032 |
| 3096 | 2033 cleanup: |
| 4051 | 2034 |
| 5765 | 2035 std::string s = buf.str (); |
| 4051 | 2036 |
| 2037 int len = s.length (); | |
| 2038 while (len--) | |
| 4410 | 2039 yyunput (s[len], yytext); |
| 3096 | 2040 |
| 2857 | 2041 return false; |
| 973 | 2042 } |
| 2043 | |
| 1001 | 2044 // We have seen a `.' and need to see if it is the start of a |
| 2045 // continuation. If so, this eats it, up to and including the new | |
| 2046 // line character. | |
| 2047 | |
| 2857 | 2048 static bool |
| 3096 | 2049 have_ellipsis_continuation (bool trailing_comments_ok) |
| 973 | 2050 { |
|
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2051 char c1 = text_yyinput (); |
| 973 | 2052 if (c1 == '.') |
| 2053 { | |
|
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2054 char c2 = text_yyinput (); |
| 1091 | 2055 if (c2 == '.' && have_continuation (trailing_comments_ok)) |
| 2857 | 2056 return true; |
| 973 | 2057 else |
| 2058 { | |
| 4410 | 2059 yyunput (c2, yytext); |
| 2060 yyunput (c1, yytext); | |
| 973 | 2061 } |
| 2062 } | |
| 2063 else | |
| 4410 | 2064 yyunput (c1, yytext); |
| 973 | 2065 |
| 2857 | 2066 return false; |
| 973 | 2067 } |
| 2068 | |
| 1001 | 2069 // See if we have a continuation line. If so, eat it and the leading |
| 2070 // whitespace on the next line. | |
| 1088 | 2071 // |
| 2072 // Return value is the same as described for eat_whitespace(). | |
| 1001 | 2073 |
| 1826 | 2074 static yum_yum |
| 1001 | 2075 eat_continuation (void) |
| 2076 { | |
| 1826 | 2077 int retval = ATE_NOTHING; |
| 3665 | 2078 |
|
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2079 int c = text_yyinput (); |
| 3665 | 2080 |
| 1001 | 2081 if ((c == '.' && have_ellipsis_continuation ()) |
| 3105 | 2082 || (c == '\\' && have_continuation ())) |
| 1001 | 2083 retval = eat_whitespace (); |
| 2084 else | |
| 4410 | 2085 yyunput (c, yytext); |
| 1001 | 2086 |
| 2087 return retval; | |
| 2088 } | |
| 2089 | |
| 973 | 2090 static int |
| 975 | 2091 handle_string (char delim, int text_style) |
| 973 | 2092 { |
| 5765 | 2093 std::ostringstream buf; |
| 973 | 2094 |
| 3805 | 2095 int bos_line = input_line_number; |
| 2096 int bos_col = current_input_column; | |
| 2097 | |
| 973 | 2098 int c; |
| 1031 | 2099 int escape_pending = 0; |
| 973 | 2100 |
|
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2101 while ((c = text_yyinput ()) != EOF) |
| 973 | 2102 { |
| 2103 current_input_column++; | |
| 2104 | |
| 3105 | 2105 if (c == '\\') |
| 973 | 2106 { |
| 5359 | 2107 if (delim == '\'' || escape_pending) |
| 1053 | 2108 { |
| 3802 | 2109 buf << static_cast<char> (c); |
| 1053 | 2110 escape_pending = 0; |
| 2111 } | |
| 2112 else | |
| 2113 { | |
| 3096 | 2114 if (have_continuation (false)) |
| 1053 | 2115 escape_pending = 0; |
| 2116 else | |
| 2117 { | |
| 3802 | 2118 buf << static_cast<char> (c); |
| 1053 | 2119 escape_pending = 1; |
| 2120 } | |
| 2121 } | |
| 1031 | 2122 continue; |
| 973 | 2123 } |
| 2124 else if (c == '.') | |
| 2125 { | |
| 5359 | 2126 if (delim == '\'' || ! have_ellipsis_continuation (false)) |
| 3802 | 2127 buf << static_cast<char> (c); |
| 973 | 2128 } |
| 2129 else if (c == '\n') | |
| 2130 { | |
| 1053 | 2131 error ("unterminated string constant"); |
| 973 | 2132 break; |
| 2133 } | |
| 2134 else if (c == delim) | |
| 2135 { | |
| 1031 | 2136 if (escape_pending) |
| 3802 | 2137 buf << static_cast<char> (c); |
| 973 | 2138 else |
| 2139 { | |
|
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2140 c = text_yyinput (); |
| 973 | 2141 if (c == delim) |
| 5102 | 2142 { |
| 2143 buf << static_cast<char> (c); | |
| 2144 if (lexer_flags.doing_rawcommand) | |
| 2145 buf << static_cast<char> (c); | |
| 2146 } | |
| 973 | 2147 else |
| 2148 { | |
| 5102 | 2149 std::string s; |
| 4410 | 2150 yyunput (c, yytext); |
| 5765 | 2151 |
| 5279 | 2152 if (lexer_flags.doing_rawcommand || delim == '\'') |
| 5765 | 2153 s = buf.str (); |
| 5102 | 2154 else |
| 5765 | 2155 s = do_string_escapes (buf.str ()); |
| 975 | 2156 |
| 5102 | 2157 if (text_style && lexer_flags.doing_rawcommand) |
| 2158 s = std::string (1, delim) + s + std::string (1, delim); | |
| 975 | 2159 else |
| 2160 { | |
| 2857 | 2161 lexer_flags.quote_is_transpose = true; |
| 2162 lexer_flags.convert_spaces_to_comma = true; | |
| 975 | 2163 } |
| 2164 | |
| 3805 | 2165 yylval.tok_val = new token (s, bos_line, bos_col); |
| 973 | 2166 token_stack.push (yylval.tok_val); |
| 3400 | 2167 |
| 4037 | 2168 if (delim == '"') |
| 2169 gripe_matlab_incompatible ("\" used as string delimiter"); | |
| 2170 else if (delim == '\'') | |
| 3400 | 2171 gripe_single_quote_string (); |
| 2172 | |
| 5279 | 2173 return delim == '"' ? DQ_STRING : SQ_STRING; |
| 973 | 2174 } |
| 2175 } | |
| 2176 } | |
| 2177 else | |
| 2178 { | |
| 3802 | 2179 buf << static_cast<char> (c); |
| 973 | 2180 } |
| 2181 | |
| 1031 | 2182 escape_pending = 0; |
| 973 | 2183 } |
| 2184 | |
| 2185 return LEXICAL_ERROR; | |
| 2186 } | |
| 2187 | |
| 3208 | 2188 static bool |
| 2189 next_token_is_assign_op (void) | |
| 2190 { | |
| 2191 bool retval = false; | |
| 2192 | |
|
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2193 int c0 = text_yyinput (); |
| 3208 | 2194 |
| 2195 switch (c0) | |
| 2196 { | |
| 2197 case '=': | |
| 2198 { | |
|
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2199 int c1 = text_yyinput (); |
| 4410 | 2200 yyunput (c1, yytext); |
| 3208 | 2201 if (c1 != '=') |
| 2202 retval = true; | |
| 2203 } | |
| 2204 break; | |
| 2205 | |
| 2206 case '+': | |
| 2207 case '-': | |
| 2208 case '*': | |
| 2209 case '/': | |
| 2210 case '\\': | |
| 2211 case '&': | |
| 2212 case '|': | |
| 2213 { | |
|
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2214 int c1 = text_yyinput (); |
| 4410 | 2215 yyunput (c1, yytext); |
| 3208 | 2216 if (c1 == '=') |
| 2217 retval = true; | |
| 2218 } | |
| 2219 break; | |
| 2220 | |
| 2221 case '.': | |
| 2222 { | |
|
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2223 int c1 = text_yyinput (); |
| 3208 | 2224 if (match_any (c1, "+-*/\\")) |
| 2225 { | |
|
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2226 int c2 = text_yyinput (); |
| 4410 | 2227 yyunput (c2, yytext); |
| 3208 | 2228 if (c2 == '=') |
| 2229 retval = true; | |
| 2230 } | |
| 4410 | 2231 yyunput (c1, yytext); |
| 3208 | 2232 } |
| 2233 break; | |
| 2234 | |
| 2235 case '>': | |
| 2236 { | |
|
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2237 int c1 = text_yyinput (); |
| 3208 | 2238 if (c1 == '>') |
| 2239 { | |
|
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2240 int c2 = text_yyinput (); |
| 4410 | 2241 yyunput (c2, yytext); |
| 3208 | 2242 if (c2 == '=') |
| 2243 retval = true; | |
| 2244 } | |
| 4410 | 2245 yyunput (c1, yytext); |
| 3208 | 2246 } |
| 2247 break; | |
| 2248 | |
| 2249 case '<': | |
| 2250 { | |
|
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2251 int c1 = text_yyinput (); |
| 3208 | 2252 if (c1 == '<') |
| 2253 { | |
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2254 int c2 = text_yyinput (); |
| 4410 | 2255 yyunput (c2, yytext); |
| 3208 | 2256 if (c2 == '=') |
| 2257 retval = true; | |
| 2258 } | |
| 4410 | 2259 yyunput (c1, yytext); |
| 3208 | 2260 } |
| 2261 break; | |
| 2262 | |
| 2263 default: | |
| 2264 break; | |
| 2265 } | |
| 2266 | |
| 4410 | 2267 yyunput (c0, yytext); |
| 3208 | 2268 |
| 2269 return retval; | |
| 2270 } | |
| 2271 | |
| 4633 | 2272 static bool |
| 2273 next_token_is_index_op (void) | |
| 2274 { | |
|
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2275 int c = text_yyinput (); |
| 4633 | 2276 yyunput (c, yytext); |
| 2277 return c == '(' || c == '{'; | |
| 2278 } | |
| 2279 | |
| 4612 | 2280 static int |
| 2281 handle_close_bracket (bool spc_gobbled, int bracket_type) | |
| 971 | 2282 { |
| 4612 | 2283 int retval = bracket_type; |
| 3208 | 2284 |
| 1826 | 2285 if (! nesting_level.none ()) |
| 971 | 2286 { |
| 1826 | 2287 nesting_level.remove (); |
| 4613 | 2288 |
| 2289 if (bracket_type == ']') | |
| 2290 lexer_flags.bracketflag--; | |
| 2291 else if (bracket_type == '}') | |
| 2292 lexer_flags.braceflag--; | |
| 2293 else | |
| 2294 panic_impossible (); | |
| 971 | 2295 } |
| 2296 | |
| 4613 | 2297 if (lexer_flags.bracketflag == 0 && lexer_flags.braceflag == 0) |
| 4323 | 2298 BEGIN (INITIAL); |
| 1001 | 2299 |
| 4608 | 2300 if (bracket_type == ']' |
| 2301 && next_token_is_assign_op () | |
| 2302 && ! lexer_flags.looking_at_return_list) | |
| 971 | 2303 { |
| 3208 | 2304 retval = CLOSE_BRACE; |
| 971 | 2305 } |
| 4613 | 2306 else if ((lexer_flags.bracketflag || lexer_flags.braceflag) |
| 2307 && lexer_flags.convert_spaces_to_comma | |
| 2308 && (nesting_level.is_bracket () | |
| 2309 || (nesting_level.is_brace () | |
| 2310 && ! lexer_flags.looking_at_object_index))) | |
| 971 | 2311 { |
| 4633 | 2312 bool index_op = next_token_is_index_op (); |
| 2313 | |
| 2314 // Don't insert comma if we are looking at something like | |
| 2315 // | |
| 2316 // [x{i}{j}] or [x{i}(j)] | |
| 2317 // | |
| 2318 // but do if we are looking at | |
| 2319 // | |
| 2320 // [x{i} {j}] or [x{i} (j)] | |
| 2321 | |
| 2322 if (spc_gobbled || ! (bracket_type == '}' && index_op)) | |
| 971 | 2323 { |
| 4633 | 2324 bool bin_op = next_token_is_bin_op (spc_gobbled); |
| 2325 | |
| 2326 bool postfix_un_op = next_token_is_postfix_unary_op (spc_gobbled); | |
| 2327 | |
| 2328 bool sep_op = next_token_is_sep_op (); | |
| 2329 | |
| 2330 if (! (postfix_un_op || bin_op || sep_op)) | |
| 2331 { | |
| 2332 maybe_warn_separator_insert (','); | |
| 2333 | |
| 2334 yyunput (',', yytext); | |
| 2335 return retval; | |
| 2336 } | |
| 971 | 2337 } |
| 2338 } | |
| 2339 | |
| 2857 | 2340 lexer_flags.quote_is_transpose = true; |
| 2341 lexer_flags.convert_spaces_to_comma = true; | |
| 3208 | 2342 |
| 2343 return retval; | |
| 971 | 2344 } |
| 2345 | |
| 1072 | 2346 static void |
| 2347 maybe_unput_comma (int spc_gobbled) | |
| 2348 { | |
| 4613 | 2349 if (nesting_level.is_bracket () |
| 2350 || (nesting_level.is_brace () | |
| 2351 && ! lexer_flags.looking_at_object_index)) | |
| 1072 | 2352 { |
| 3246 | 2353 int bin_op = next_token_is_bin_op (spc_gobbled); |
| 1072 | 2354 |
| 3246 | 2355 int postfix_un_op = next_token_is_postfix_unary_op (spc_gobbled); |
| 1072 | 2356 |
|
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2357 int c1 = text_yyinput (); |
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2358 int c2 = text_yyinput (); |
| 2970 | 2359 |
| 4410 | 2360 yyunput (c2, yytext); |
| 2361 yyunput (c1, yytext); | |
| 2970 | 2362 |
| 3263 | 2363 int sep_op = next_token_is_sep_op (); |
| 2970 | 2364 |
| 1072 | 2365 int dot_op = (c1 == '.' |
| 2366 && (isalpha (c2) || isspace (c2) || c2 == '_')); | |
| 2970 | 2367 |
| 3388 | 2368 if (postfix_un_op || bin_op || sep_op || dot_op) |
| 2369 return; | |
| 2370 | |
| 3985 | 2371 int index_op = (c1 == '(' || c1 == '{'); |
| 3388 | 2372 |
| 4476 | 2373 // If there is no space before the indexing op, we don't insert |
| 2374 // a comma. | |
| 2375 | |
| 2376 if (index_op && ! spc_gobbled) | |
| 2377 return; | |
| 2378 | |
| 2379 maybe_warn_separator_insert (','); | |
| 2380 | |
| 2381 yyunput (',', yytext); | |
| 1072 | 2382 } |
| 2383 } | |
| 2384 | |
| 767 | 2385 // Figure out exactly what kind of token to return when we have seen |
| 4238 | 2386 // an identifier. Handles keywords. Return -1 if the identifier |
| 2387 // should be ignored. | |
| 767 | 2388 |
| 146 | 2389 static int |
| 3974 | 2390 handle_identifier (void) |
| 146 | 2391 { |
| 3974 | 2392 std::string tok = strip_trailing_whitespace (yytext); |
| 2393 | |
| 2394 int c = yytext[yyleng-1]; | |
| 2395 | |
| 2396 int cont_is_spc = eat_continuation (); | |
| 2397 | |
| 2398 int spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); | |
| 2399 | |
| 2970 | 2400 // If we are expecting a structure element, avoid recognizing |
| 2401 // keywords and other special names and return STRUCT_ELT, which is | |
| 2402 // a string that is also a valid identifier. But first, we have to | |
| 2403 // decide whether to insert a comma. | |
| 747 | 2404 |
| 1826 | 2405 if (lexer_flags.looking_at_indirect_ref) |
| 1072 | 2406 { |
| 2970 | 2407 do_comma_insert_check (); |
| 2408 | |
| 1072 | 2409 maybe_unput_comma (spc_gobbled); |
| 2819 | 2410 |
| 2411 yylval.tok_val = new token (tok, input_line_number, | |
| 2412 current_input_column); | |
| 2413 | |
| 2414 token_stack.push (yylval.tok_val); | |
| 2415 | |
| 2857 | 2416 lexer_flags.quote_is_transpose = true; |
| 2417 lexer_flags.convert_spaces_to_comma = true; | |
| 2819 | 2418 |
| 2419 current_input_column += yyleng; | |
| 2420 | |
| 2970 | 2421 return STRUCT_ELT; |
| 1072 | 2422 } |
| 747 | 2423 |
| 4930 | 2424 int kw_token = is_keyword_token (tok); |
| 2425 | |
| 2426 if (lexer_flags.looking_at_function_handle) | |
| 2427 { | |
| 2428 if (kw_token) | |
| 2429 { | |
| 2430 error ("function handles may not refer to keywords"); | |
| 2431 | |
| 2432 return LEXICAL_ERROR; | |
| 2433 } | |
| 2434 else | |
|
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2435 { |
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2436 yylval.tok_val = new token (tok, input_line_number, |
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2437 current_input_column); |
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2438 |
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2439 token_stack.push (yylval.tok_val); |
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2440 |
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2441 current_input_column += yyleng; |
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2442 lexer_flags.quote_is_transpose = false; |
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2443 lexer_flags.convert_spaces_to_comma = true; |
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2444 |
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2445 return FCN_HANDLE; |
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2446 } |
| 4930 | 2447 } |
| 2448 | |
| 5102 | 2449 // If we have a regular keyword, return it. |
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2450 // Keywords can be followed by identifiers. |
| 146 | 2451 |
| 2452 if (kw_token) | |
| 2453 { | |
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2454 if (kw_token >= 0) |
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2455 { |
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2456 current_input_column += yyleng; |
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2457 lexer_flags.quote_is_transpose = false; |
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2458 lexer_flags.convert_spaces_to_comma = true; |
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2459 } |
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2460 |
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|
2461 return kw_token; |
| 146 | 2462 } |
| 2463 | |
| 1826 | 2464 // See if we have a plot keyword (title, using, with, or clear). |
| 146 | 2465 |
|
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2466 int c1 = text_yyinput (); |
| 3480 | 2467 |
| 2468 bool next_tok_is_paren = (c1 == '('); | |
| 2469 | |
| 2470 bool next_tok_is_eq = false; | |
| 2471 if (c1 == '=') | |
| 2472 { | |
|
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2473 int c2 = text_yyinput (); |
| 4410 | 2474 yyunput (c2, yytext); |
| 3480 | 2475 |
| 2476 if (c2 != '=') | |
| 2477 next_tok_is_eq = true; | |
| 2478 } | |
| 2479 | |
| 4410 | 2480 yyunput (c1, yytext); |
| 1001 | 2481 |
| 2702 | 2482 // Kluge alert. |
| 2483 // | |
| 2484 // If we are looking at a text style function, set up to gobble its | |
| 2745 | 2485 // arguments. |
| 2486 // | |
| 2487 // If the following token is `=', or if we are parsing a function | |
| 3189 | 2488 // return list or function parameter list, or if we are looking at |
| 2489 // something like [ab,cd] = foo (), force the symbol to be inserted | |
| 2490 // as a variable in the current symbol table. | |
| 2702 | 2491 |
| 4208 | 2492 if (is_command_name (tok) && ! is_variable (tok)) |
| 2702 | 2493 { |
| 2745 | 2494 if (next_tok_is_eq |
| 2495 || lexer_flags.looking_at_return_list | |
|
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2496 || (lexer_flags.looking_at_parameter_list |
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|
2497 && ! lexer_flags.looking_at_initializer_expression) |
| 4101 | 2498 || lexer_flags.looking_at_matrix_or_assign_lhs) |
| 2745 | 2499 { |
| 2500 force_local_variable (tok); | |
| 2501 } | |
| 6067 | 2502 else if (! (next_tok_is_paren || lexer_flags.looking_at_object_index)) |
| 2702 | 2503 { |
| 5102 | 2504 BEGIN (COMMAND_START); |
| 2505 } | |
| 2506 | |
| 6067 | 2507 if (is_rawcommand_name (tok) && ! lexer_flags.looking_at_object_index) |
| 5102 | 2508 { |
| 2509 lexer_flags.doing_rawcommand = true; | |
| 4323 | 2510 BEGIN (COMMAND_START); |
| 2702 | 2511 } |
| 2512 } | |
| 2513 | |
| 4234 | 2514 // Find the token in the symbol table. Beware the magic |
| 2515 // transformation of the end keyword... | |
| 2516 | |
| 2517 if (tok == "end") | |
| 2518 tok = "__end__"; | |
| 146 | 2519 |
| 7336 | 2520 yylval.tok_val = new token (&(symbol_table::insert (tok)), |
| 2521 input_line_number, current_input_column); | |
| 2522 | |
| 146 | 2523 token_stack.push (yylval.tok_val); |
| 2524 | |
| 1826 | 2525 // After seeing an identifer, it is ok to convert spaces to a comma |
| 2526 // (if needed). | |
| 146 | 2527 |
| 2857 | 2528 lexer_flags.convert_spaces_to_comma = true; |
| 146 | 2529 |
| 2877 | 2530 if (! next_tok_is_eq) |
| 2531 { | |
| 2532 lexer_flags.quote_is_transpose = true; | |
| 146 | 2533 |
| 2877 | 2534 do_comma_insert_check (); |
| 2535 | |
| 2536 maybe_unput_comma (spc_gobbled); | |
| 146 | 2537 } |
| 2538 | |
| 2877 | 2539 current_input_column += yyleng; |
| 146 | 2540 |
| 2541 return NAME; | |
| 2542 } | |
| 2543 | |
| 1826 | 2544 void |
| 2545 lexical_feedback::init (void) | |
| 2546 { | |
| 2547 // Not initially defining a matrix list. | |
| 3351 | 2548 bracketflag = 0; |
| 1826 | 2549 |
| 4613 | 2550 // Not initially defining a cell array list. |
| 2551 braceflag = 0; | |
| 2552 | |
| 1826 | 2553 // Not initially inside a loop or if statement. |
| 2554 looping = 0; | |
| 2555 | |
| 2857 | 2556 // Not initially defining a function. |
| 2557 defining_func = false; | |
| 2877 | 2558 parsed_function_name = false; |
| 4240 | 2559 parsing_nested_function = 0; |
| 7336 | 2560 parsing_class_method = false; |
| 2857 | 2561 |
| 4930 | 2562 // Not initiallly looking at a function handle. |
| 2563 looking_at_function_handle = 0; | |
| 2564 | |
| 2857 | 2565 // Not parsing a function return or parameter list. |
| 2566 looking_at_return_list = false; | |
| 2567 looking_at_parameter_list = false; | |
| 2568 | |
|
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2569 // Not looking at an argument list initializer expression. |
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|
2570 looking_at_initializer_expression = false; |
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|
2571 |
| 3796 | 2572 // Not parsing a matrix or the left hand side of multi-value |
| 2573 // assignment statement. | |
| 2574 looking_at_matrix_or_assign_lhs = false; | |
| 2575 | |
| 4234 | 2576 // Not parsing an object index. |
| 4237 | 2577 looking_at_object_index = 0; |
| 4234 | 2578 |
| 2857 | 2579 // No need to do comma insert or convert spaces to comma at |
| 2580 // beginning of input. | |
| 2581 convert_spaces_to_comma = true; | |
| 2582 do_comma_insert = false; | |
| 2583 | |
| 2584 // Not initially doing any plotting or setting of plot attributes. | |
| 5102 | 2585 doing_rawcommand = false; |
| 2857 | 2586 |
| 1826 | 2587 // Not initially looking at indirect references. |
| 2857 | 2588 looking_at_indirect_ref = false; |
| 1826 | 2589 |
| 2590 // Quote marks strings intially. | |
| 2857 | 2591 quote_is_transpose = false; |
| 1826 | 2592 } |
| 2593 | |
| 4867 | 2594 bool |
| 2595 is_keyword (const std::string& s) | |
| 2596 { | |
| 5088 | 2597 return octave_kw_hash::in_word_set (s.c_str (), s.length ()) != 0; |
| 4867 | 2598 } |
| 2599 | |
| 4264 | 2600 DEFCMD (iskeyword, args, , |
| 2601 "-*- texinfo -*-\n\ | |
| 2602 @deftypefn {Built-in Function} {} iskeyword (@var{name})\n\ | |
| 2603 Return true if @var{name} is an Octave keyword. If @var{name}\n\ | |
| 2604 is omitted, return a list of keywords.\n\ | |
| 2605 @end deftypefn") | |
| 2606 { | |
| 2607 octave_value retval; | |
| 2608 | |
| 2609 int argc = args.length () + 1; | |
| 2610 | |
| 4867 | 2611 string_vector argv = args.make_argv ("iskeyword"); |
| 4264 | 2612 |
| 2613 if (error_state) | |
| 2614 return retval; | |
| 2615 | |
| 2616 if (argc == 1) | |
| 2617 { | |
| 2618 string_vector lst (TOTAL_KEYWORDS); | |
| 2619 | |
| 2620 for (int i = 0; i < TOTAL_KEYWORDS; i++) | |
| 2621 lst[i] = wordlist[i].name; | |
| 2622 | |
| 2623 retval = Cell (lst.qsort ()); | |
| 2624 } | |
| 2625 else if (argc == 2) | |
| 2626 { | |
| 4867 | 2627 retval = is_keyword (argv[1]); |
| 4264 | 2628 } |
| 2629 else | |
| 5823 | 2630 print_usage (); |
| 4264 | 2631 |
| 2632 return retval; | |
| 2633 } | |
| 2634 | |
|
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2635 void |
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2636 prep_lexer_for_script (void) |
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2637 { |
|
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2638 BEGIN (SCRIPT_FILE_BEGIN); |
|
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2639 } |
| 4264 | 2640 |
| 3388 | 2641 static void |
| 2642 maybe_warn_separator_insert (char sep) | |
| 2643 { | |
| 3523 | 2644 std::string nm = curr_fcn_file_full_name; |
| 3388 | 2645 |
| 5794 | 2646 if (nm.empty ()) |
| 2647 warning_with_id ("Octave:separator-insert", | |
| 2648 "potential auto-insertion of `%c' near line %d", | |
| 2649 sep, input_line_number); | |
| 2650 else | |
| 2651 warning_with_id ("Octave:separator-insert", | |
| 2652 "potential auto-insertion of `%c' near line %d of file %s", | |
| 2653 sep, input_line_number, nm.c_str ()); | |
| 3388 | 2654 } |
| 2655 | |
| 3400 | 2656 static void |
| 2657 gripe_single_quote_string (void) | |
| 2658 { | |
| 3523 | 2659 std::string nm = curr_fcn_file_full_name; |
| 3400 | 2660 |
| 5794 | 2661 if (nm.empty ()) |
| 2662 warning_with_id ("Octave:single-quote-string", | |
| 2663 "single quote delimited string near line %d", | |
| 2664 input_line_number); | |
| 2665 else | |
| 2666 warning_with_id ("Octave:single-quote-string", | |
| 2667 "single quote delimited string near line %d of file %s", | |
| 2668 input_line_number, nm.c_str ()); | |
| 3400 | 2669 } |
| 2670 | |
| 4037 | 2671 static void |
| 2672 gripe_matlab_incompatible (const std::string& msg) | |
| 2673 { | |
| 5794 | 2674 warning_with_id ("Octave:matlab-incompatible", |
| 2675 "potential Matlab compatibility problem: %s", | |
| 2676 msg.c_str ()); | |
| 4037 | 2677 } |
| 2678 | |
| 2679 static void | |
| 2680 maybe_gripe_matlab_incompatible_comment (char c) | |
| 2681 { | |
| 2682 if (c == '#') | |
| 2683 gripe_matlab_incompatible ("# used as comment character"); | |
| 2684 } | |
| 2685 | |
| 2686 static void | |
| 2687 gripe_matlab_incompatible_continuation (void) | |
| 2688 { | |
| 2689 gripe_matlab_incompatible ("\\ used as line continuation marker"); | |
| 2690 } | |
| 2691 | |
| 2692 static void | |
| 2693 gripe_matlab_incompatible_operator (const std::string& op) | |
| 2694 { | |
| 2695 std::string t = op; | |
| 2696 int n = t.length (); | |
| 2697 if (t[n-1] == '\n') | |
| 2698 t.resize (n-1); | |
| 2699 gripe_matlab_incompatible (t + " used as operator"); | |
| 2700 } | |
| 2701 | |
|
7722
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2702 static void |
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2703 display_token (int tok) |
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2704 { |
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2705 switch (tok) |
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2706 { |
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2707 case '=': std::cerr << "'='\n"; break; |
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2708 case ':': std::cerr << "':'\n"; break; |
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2709 case '-': std::cerr << "'-'\n"; break; |
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2710 case '+': std::cerr << "'+'\n"; break; |
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2711 case '*': std::cerr << "'*'\n"; break; |
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2712 case '/': std::cerr << "'/'\n"; break; |
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2713 case ADD_EQ: std::cerr << "ADD_EQ\n"; break; |
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2714 case SUB_EQ: std::cerr << "SUB_EQ\n"; break; |
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2715 case MUL_EQ: std::cerr << "MUL_EQ\n"; break; |
|
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2716 case DIV_EQ: std::cerr << "DIV_EQ\n"; break; |
|
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2717 case LEFTDIV_EQ: std::cerr << "LEFTDIV_EQ\n"; break; |
|
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2718 case POW_EQ: std::cerr << "POW_EQ\n"; break; |
|
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2719 case EMUL_EQ: std::cerr << "EMUL_EQ\n"; break; |
|
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2720 case EDIV_EQ: std::cerr << "EDIV_EQ\n"; break; |
|
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2721 case ELEFTDIV_EQ: std::cerr << "ELEFTDIV_EQ\n"; break; |
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2722 case EPOW_EQ: std::cerr << "EPOW_EQ\n"; break; |
|
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2723 case AND_EQ: std::cerr << "AND_EQ\n"; break; |
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2724 case OR_EQ: std::cerr << "OR_EQ\n"; break; |
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2725 case LSHIFT_EQ: std::cerr << "LSHIFT_EQ\n"; break; |
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2726 case RSHIFT_EQ: std::cerr << "RSHIFT_EQ\n"; break; |
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2727 case LSHIFT: std::cerr << "LSHIFT\n"; break; |
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2728 case RSHIFT: std::cerr << "RSHIFT\n"; break; |
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2729 case EXPR_AND_AND: std::cerr << "EXPR_AND_AND\n"; break; |
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2730 case EXPR_OR_OR: std::cerr << "EXPR_OR_OR\n"; break; |
|
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2731 case EXPR_AND: std::cerr << "EXPR_AND\n"; break; |
|
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2732 case EXPR_OR: std::cerr << "EXPR_OR\n"; break; |
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2733 case EXPR_NOT: std::cerr << "EXPR_NOT\n"; break; |
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2734 case EXPR_LT: std::cerr << "EXPR_LT\n"; break; |
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2735 case EXPR_LE: std::cerr << "EXPR_LE\n"; break; |
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2736 case EXPR_EQ: std::cerr << "EXPR_EQ\n"; break; |
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2737 case EXPR_NE: std::cerr << "EXPR_NE\n"; break; |
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2738 case EXPR_GE: std::cerr << "EXPR_GE\n"; break; |
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2739 case EXPR_GT: std::cerr << "EXPR_GT\n"; break; |
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2740 case LEFTDIV: std::cerr << "LEFTDIV\n"; break; |
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2741 case EMUL: std::cerr << "EMUL\n"; break; |
|
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2742 case EDIV: std::cerr << "EDIV\n"; break; |
|
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2743 case ELEFTDIV: std::cerr << "ELEFTDIV\n"; break; |
|
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2744 case EPLUS: std::cerr << "EPLUS\n"; break; |
|
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2745 case EMINUS: std::cerr << "EMINUS\n"; break; |
|
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2746 case QUOTE: std::cerr << "QUOTE\n"; break; |
|
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2747 case TRANSPOSE: std::cerr << "TRANSPOSE\n"; break; |
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2748 case PLUS_PLUS: std::cerr << "PLUS_PLUS\n"; break; |
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2749 case MINUS_MINUS: std::cerr << "MINUS_MINUS\n"; break; |
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2750 case POW: std::cerr << "POW\n"; break; |
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2751 case EPOW: std::cerr << "EPOW\n"; break; |
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2752 case NUM: std::cerr << "NUM\n"; break; |
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2753 case IMAG_NUM: std::cerr << "IMAG_NUM\n"; break; |
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2754 case STRUCT_ELT: std::cerr << "STRUCT_ELT\n"; break; |
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2755 case NAME: std::cerr << "NAME\n"; break; |
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2756 case END: std::cerr << "END\n"; break; |
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2757 case DQ_STRING: std::cerr << "DQ_STRING\n"; break; |
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2758 case SQ_STRING: std::cerr << "SQ_STRING\n"; break; |
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2759 case FOR: std::cerr << "FOR\n"; break; |
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2760 case WHILE: std::cerr << "WHILE\n"; break; |
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2761 case DO: std::cerr << "DO\n"; break; |
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2762 case UNTIL: std::cerr << "UNTIL\n"; break; |
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2763 case IF: std::cerr << "IF\n"; break; |
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2764 case ELSEIF: std::cerr << "ELSEIF\n"; break; |
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2765 case ELSE: std::cerr << "ELSE\n"; break; |
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2766 case SWITCH: std::cerr << "SWITCH\n"; break; |
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2767 case CASE: std::cerr << "CASE\n"; break; |
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2768 case OTHERWISE: std::cerr << "OTHERWISE\n"; break; |
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2769 case BREAK: std::cerr << "BREAK\n"; break; |
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2770 case CONTINUE: std::cerr << "CONTINUE\n"; break; |
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2771 case FUNC_RET: std::cerr << "FUNC_RET\n"; break; |
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2772 case UNWIND: std::cerr << "UNWIND\n"; break; |
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2773 case CLEANUP: std::cerr << "CLEANUP\n"; break; |
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2774 case TRY: std::cerr << "TRY\n"; break; |
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2775 case CATCH: std::cerr << "CATCH\n"; break; |
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2776 case GLOBAL: std::cerr << "GLOBAL\n"; break; |
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2777 case STATIC: std::cerr << "STATIC\n"; break; |
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2778 case FCN_HANDLE: std::cerr << "FCN_HANDLE\n"; break; |
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2779 case END_OF_INPUT: std::cerr << "END_OF_INPUT\n\n"; break; |
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2780 case LEXICAL_ERROR: std::cerr << "LEXICAL_ERROR\n\n"; break; |
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2781 case FCN: std::cerr << "FCN\n"; break; |
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2782 case CLOSE_BRACE: std::cerr << "CLOSE_BRACE\n"; break; |
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2783 case '\n': std::cerr << "\\n\n"; break; |
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2784 case '\r': std::cerr << "\\r\n"; break; |
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2785 case '\t': std::cerr << "TAB\n"; break; |
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2786 default: |
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2787 { |
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2788 if (tok < 256) |
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2789 std::cerr << static_cast<char> (tok) << "\n"; |
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2790 else |
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2791 std::cerr << "UNKNOWN(" << tok << ")\n"; |
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2792 } |
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2793 break; |
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2794 } |
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2795 } |
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2796 |
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2797 DEFUN (__display_tokens__, args, nargout, |
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2798 "-*- texinfo -*-\n\ |
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2799 @deftypefn {Built-in Function} {} __display_tokens__\n\ |
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2800 Query or set the internal variable that determines whether Octave's\n\ |
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2801 lexer displays tokens as they are read.\n\ |
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2802 @end deftypefn") |
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2803 { |
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2804 return SET_INTERNAL_VARIABLE (display_tokens); |
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2805 } |
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2806 |
| 4910 | 2807 DEFUN (__token_count__, , , |
| 2808 "-*- texinfo -*-\n\ | |
| 2809 @deftypefn {Built-in Function} {} __token_count__\n\ | |
| 2810 Number of language tokens processed since Octave startup.\n\ | |
| 2811 @end deftypefn") | |
| 2812 { | |
| 2813 return octave_value (Vtoken_count); | |
| 2814 } | |
| 2815 | |
| 1994 | 2816 /* |
| 2817 ;;; Local Variables: *** | |
| 2818 ;;; mode: C++ *** | |
| 2819 ;;; End: *** | |
| 2820 */ |