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scan.h
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scan.h
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/*
* Copyright 1993, 1995 Christopher Seiwald.
*
* This file is part of Jam - see jam.c for Copyright information.
*/
/*
* scan.h - the jam yacc scanner
*
* External functions:
*
* yyerror( char *s ) - print a parsing error message
* yyfparse( char *s ) - scan include file s
* yylex() - parse the next token, returning its type
* yymode() - adjust lexicon of scanner
* yyparse() - declaration for yacc parser
* yyanyerrors() - indicate if any parsing errors occured
*
* The yymode() function is for the parser to adjust the lexicon of the
* scanner. Aside from normal keyword scanning, there is a mode to
* handle action strings (look only for the closing }) and a mode to
* ignore most keywords when looking for a punctuation keyword. This
* allows non-punctuation keywords to be used in lists without quoting.
*
* 11/04/02 (seiwald) - const-ing for string literals
*/
/*
* YYSTYPE - value of a lexical token
*/
# define YYSTYPE YYSYMBOL
typedef struct _YYSTYPE {
int type;
const char *string;
PARSE *parse;
LIST *list;
int number;
} YYSTYPE;
extern YYSTYPE yylval;
void yymode( int n );
void yyerror( const char *s );
int yyanyerrors();
void yyfparse( const char *s );
int yyline();
int yylex();
int yyparse();
# define SCAN_NORMAL 0 /* normal parsing */
# define SCAN_STRING 1 /* look only for matching } */
# define SCAN_PUNCT 2 /* only punctuation keywords */