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1 // lex.h -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994, 1995 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 */ |
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23 |
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383
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24 #if !defined (octave_lex_h) |
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25 #define octave_lex_h 1 |
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26 |
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143
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27 // Arrange to get input via readline. |
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28 |
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29 #ifdef YY_INPUT |
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30 #undef YY_INPUT |
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31 #endif |
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32 #define YY_INPUT(buf,result,max_size) \ |
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33 if ((result = octave_read (buf, max_size)) < 0) \ |
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34 YY_FATAL_ERROR ("octave_read () in flex scanner failed"); |
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35 |
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36 // Try to avoid crashing out completely on fatal scanner errors. |
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37 |
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38 #ifdef YY_FATAL_ERROR |
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39 #undef YY_FATAL_ERROR |
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40 #endif |
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143
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41 #define YY_FATAL_ERROR(msg) \ |
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42 do \ |
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43 { \ |
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44 error (msg); \ |
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45 jump_to_top_level (); \ |
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46 } \ |
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47 while (0) |
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48 |
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49 #define TOK_RETURN(tok) \ |
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50 do \ |
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51 { \ |
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52 current_input_column += yyleng; \ |
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53 quote_is_transpose = 0; \ |
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54 cant_be_identifier = 0; \ |
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55 convert_spaces_to_comma = 1; \ |
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56 return (tok); \ |
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57 } \ |
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58 while (0) |
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59 |
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60 #define TOK_PUSH_AND_RETURN(name,tok) \ |
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61 do \ |
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62 { \ |
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63 yylval.tok_val = new token (name, input_line_number, \ |
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64 current_input_column); \ |
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65 token_stack.push (yylval.tok_val); \ |
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66 TOK_RETURN (tok); \ |
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67 } \ |
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68 while (0) |
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69 |
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70 #define BIN_OP_RETURN(tok,convert) \ |
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71 do \ |
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72 { \ |
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73 yylval.tok_val = new token (input_line_number, current_input_column); \ |
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74 token_stack.push (yylval.tok_val); \ |
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75 current_input_column += yyleng; \ |
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76 quote_is_transpose = 0; \ |
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77 cant_be_identifier = 0; \ |
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78 convert_spaces_to_comma = convert; \ |
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79 return (tok); \ |
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80 } \ |
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81 while (0) |
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82 |
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83 typedef struct yy_buffer_state *YY_BUFFER_STATE; |
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84 |
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85 // Associate a buffer with a new file to read. |
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86 extern YY_BUFFER_STATE create_buffer (FILE *f); |
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87 |
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88 // Report the current buffer. |
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89 extern YY_BUFFER_STATE current_buffer (void); |
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90 |
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91 // Connect to new buffer buffer. |
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92 extern void switch_to_buffer (YY_BUFFER_STATE buf); |
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93 |
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94 // Delete a buffer. |
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95 extern void delete_buffer (YY_BUFFER_STATE buf); |
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96 |
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97 // Restore a buffer (for unwind-prot). |
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98 extern void restore_input_buffer (void *buf); |
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99 |
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100 // Delete a buffer (for unwind-prot). |
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101 extern void delete_input_buffer (void *buf); |
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102 |
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103 // See if a function file has extra garbage after the end statement. |
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104 extern void check_for_garbage_after_fcn_def (void); |
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105 |
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106 // Return transpose or start a string? |
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107 extern int quote_is_transpose; |
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108 |
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109 // Nonzero means we thing we are looking at the beginning of a |
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110 // function definition. |
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111 extern int beginning_of_function; |
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112 |
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113 #endif |
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114 |
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115 /* |
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116 ;;; Local Variables: *** |
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117 ;;; mode: C++ *** |
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118 ;;; page-delimiter: "^/\\*" *** |
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119 ;;; End: *** |
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120 */ |
