1 /** @file input_lexer.h
3 * Lexical analyzer definition for reading expressions.
4 * This file must be processed with flex. */
7 * GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #ifndef __GINAC_INPUT_LEXER_H__
25 #define __GINAC_INPUT_LEXER_H__
34 // lex functions/variables
35 extern int ginac_yyerror(char *s);
36 extern int ginac_yylex(void);
37 extern void ginac_yyrestart(FILE *f);
39 extern char *ginac_yytext;
41 extern char ginac_yytext[];
44 #ifndef NO_NAMESPACE_GINAC
46 #endif // ndef NO_NAMESPACE_GINAC
50 /** Set the input string to be parsed by ginac_yyparse() (used internally). */
51 extern void set_lexer_string(const string &s);
53 /** Set the list of predefined symbols for the lexer (used internally). */
54 extern void set_lexer_symbols(ex l);
56 /** Check whether lexer symbol was predefined (vs. created by the lexer, e.g. function names). */
57 extern bool is_lexer_symbol_predefined(const ex &s);
59 /** The expression parser function (used internally). */
60 extern int ginac_yyparse();
62 /** The expression returned by the parser (used internally). */
65 /** Get error message from the parser. */
66 extern string get_parser_error(void);
68 #ifndef NO_NAMESPACE_GINAC
70 #endif // ndef NO_NAMESPACE_GINAC
72 #endif // ndef __GINAC_INPUT_LEXER_H__