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53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/*
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* Copyright 1993, 1995 Christopher Seiwald.
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*
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* This file is part of Jam - see jam.c for Copyright information.
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*/
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/*
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* scan.h - the jam yacc scanner
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*
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* External functions:
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*
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* yyerror( char *s ) - print a parsing error message
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* yyfparse( char *s ) - scan include file s
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* yylex() - parse the next token, returning its type
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* yymode() - adjust lexicon of scanner
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* yyparse() - declaration for yacc parser
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* yyanyerrors() - indicate if any parsing errors occured
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*
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* The yymode() function is for the parser to adjust the lexicon of the
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* scanner. Aside from normal keyword scanning, there is a mode to
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* handle action strings (look only for the closing }) and a mode to
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* ignore most keywords when looking for a punctuation keyword. This
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* allows non-punctuation keywords to be used in lists without quoting.
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*/
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/*
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* YYSTYPE - value of a lexical token
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*/
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# define YYSTYPE YYSYMBOL
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typedef struct _YYSTYPE {
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int type;
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char *string;
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PARSE *parse;
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LIST *list;
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int number;
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} YYSTYPE;
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extern YYSTYPE yylval;
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void yymode( int n );
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void yyerror( char *s );
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int yyanyerrors();
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void yyfparse( char *s );
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int yyline();
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int yylex();
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int yyparse();
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# define SCAN_NORMAL 0 /* normal parsing */
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# define SCAN_STRING 1 /* look only for matching } */
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# define SCAN_PUNCT 2 /* only punctuation keywords */
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