1 /******************************** -*- C -*- **************************** 2 * 3 * External definitions for the Lexer module. 4 * 5 * 6 ***********************************************************************/ 7 8 /*********************************************************************** 9 * 10 * Copyright 1988,89,90,91,92,94,95,99,2000,2001,2002,2006,2007,2008 11 * Free Software Foundation, Inc. 12 * Written by Steve Byrne. 13 * 14 * This file is part of GNU Smalltalk. 15 * 16 * GNU Smalltalk is free software; you can redistribute it and/or modify it 17 * under the terms of the GNU General Public License as published by the Free 18 * Software Foundation; either version 2, or (at your option) any later 19 * version. 20 * 21 * Linking GNU Smalltalk statically or dynamically with other modules is 22 * making a combined work based on GNU Smalltalk. Thus, the terms and 23 * conditions of the GNU General Public License cover the whole 24 * combination. 25 * 26 * In addition, as a special exception, the Free Software Foundation 27 * give you permission to combine GNU Smalltalk with free software 28 * programs or libraries that are released under the GNU LGPL and with 29 * independent programs running under the GNU Smalltalk virtual machine. 30 * 31 * You may copy and distribute such a system following the terms of the 32 * GNU GPL for GNU Smalltalk and the licenses of the other code 33 * concerned, provided that you include the source code of that other 34 * code when and as the GNU GPL requires distribution of source code. 35 * 36 * Note that people who make modified versions of GNU Smalltalk are not 37 * obligated to grant this special exception for their modified 38 * versions; it is their choice whether to do so. The GNU General 39 * Public License gives permission to release a modified version without 40 * this exception; this exception also makes it possible to release a 41 * modified version which carries forward this exception. 42 * 43 * GNU Smalltalk is distributed in the hope that it will be useful, but WITHOUT 44 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 45 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 46 * more details. 47 * 48 * You should have received a copy of the GNU General Public License along with 49 * GNU Smalltalk; see the file COPYING. If not, write to the Free Software 50 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 51 * 52 ***********************************************************************/ 53 54 55 #ifndef GST_LEX_H 56 #define GST_LEX_H 57 58 /* True if errors must be reported to the standard error, false if 59 errors should instead stored so that they are passed to Smalltalk 60 code. */ 61 extern mst_Boolean _gst_report_errors 62 ATTRIBUTE_HIDDEN; 63 64 /* This is set to true by the parser or the compiler if an error 65 (respectively, a parse error or a semantic error) is found, and 66 avoids that _gst_execute_statements tries to execute the result of 67 the compilation. */ 68 extern mst_Boolean _gst_had_error 69 ATTRIBUTE_HIDDEN; 70 71 /* This is set to true by the parser if error recovery is going on. 72 In this case ERROR_RECOVERY tokens are generated. */ 73 extern mst_Boolean _gst_error_recovery 74 ATTRIBUTE_HIDDEN; 75 76 /* The location of the first error reported, stored here so that 77 compilation primitives can pass them to Smalltalk code. */ 78 extern char *_gst_first_error_str 79 ATTRIBUTE_HIDDEN, *_gst_first_error_file 80 ATTRIBUTE_HIDDEN; 81 extern int _gst_first_error_line 82 ATTRIBUTE_HIDDEN; 83 84 /* The obstack containing parse tree nodes. */ 85 extern struct obstack *_gst_compilation_obstack 86 ATTRIBUTE_HIDDEN; 87 88 /* Parse the topmost stream in the stack. */ 89 extern void _gst_parse_stream (mst_Boolean method) 90 ATTRIBUTE_HIDDEN; 91 92 /* Lexer interface to the lexer. */ 93 extern int _gst_yylex (PTR lvalp, YYLTYPE *llocp) 94 ATTRIBUTE_HIDDEN; 95 96 /* Print on file FILE a description of TOKEN, with auxiliary data 97 stored in LVAL. */ 98 extern void _gst_yyprint (FILE * file, 99 int token, 100 PTR lval) 101 ATTRIBUTE_HIDDEN; 102 103 /* Negate the semantic value YYLVAL, which must be a numeric token 104 of type TOKEN. Returns true if YYLVAL is positive, false if it 105 is negative. */ 106 extern mst_Boolean _gst_negate_yylval (int token, 107 YYSTYPE *yylval); 108 109 #endif /* GST_LEX_H */ 110