/*

Copyright (C) 1993-2012 John W. Eaton

This file is part of Octave.

Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.

Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING.  If not, see
<http://www.gnu.org/licenses/>.

*/

#if !defined (octave_parse_h)
#define octave_parse_h 1

#include <cstdio>

#include <string>

#include <stack>

extern void reset_parser (void);
extern int octave_lex (void);
extern int octave_parse (void);

class tree;
class tree_matrix;
class tree_identifier;
class tree_statement_list;
class octave_function;

#include "oct-obj.h"

// Nonzero means print parser debugging info (-d).
extern int octave_debug;

// The current input line number.
extern int input_line_number;

// The column of the current token.
extern int current_input_column;

// Buffer for help text snagged from function files.
extern std::stack<std::string> help_buf;

// TRUE means we are using readline.
extern bool line_editing;

// TRUE means we printed messages about reading startup files.
extern bool reading_startup_message_printed;

// TRUE means input is coming from startup file.
extern bool input_from_startup_file;

// Keep track of symbol table information when parsing functions.
extern std::stack<symbol_table::scope_id> symtab_context;

// Name of the current class when we are parsing class methods or
// constructors.
extern std::string current_class_name;

extern OCTINTERP_API std::string
get_help_from_file (const std::string& nm, bool& symbol_found,
                    std::string& file);

extern OCTINTERP_API std::string
get_help_from_file (const std::string& nm, bool& symbol_found);

extern OCTINTERP_API std::string lookup_autoload (const std::string& nm);

extern OCTINTERP_API string_vector autoloaded_functions (void);

extern OCTINTERP_API string_vector reverse_lookup_autoload (const std::string& nm);

extern OCTINTERP_API octave_function *
load_fcn_from_file (const std::string& file_name,
                    const std::string& dir_name = std::string (),
                    const std::string& dispatch_type = std::string (),
                    const std::string& fcn_name = std::string (),
                    bool autoload = false);

extern OCTINTERP_API void
source_file (const std::string& file_name,
             const std::string& context = std::string (),
             bool verbose = false, bool require_file = true,
             const std::string& warn_for = std::string ());

extern OCTINTERP_API octave_value_list
feval (const std::string& name,
       const octave_value_list& args = octave_value_list (),
       int nargout = 0);

extern OCTINTERP_API octave_value_list
feval (octave_function *fcn,
       const octave_value_list& args = octave_value_list (),
       int nargout = 0);

extern OCTINTERP_API octave_value_list
feval (const octave_value_list& args, int nargout = 0);

extern OCTINTERP_API octave_value_list
eval_string (const std::string&, bool silent, int& parse_status, int hargout);

extern OCTINTERP_API octave_value
eval_string (const std::string&, bool silent, int& parse_status);

extern OCTINTERP_API void cleanup_statement_list (tree_statement_list **lst);

#endif