/* * 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. *//* * YYSTYPE - value of a lexical token */# define YYSTYPE YYSYMBOLtypedef struct _YYSTYPE {    int     type;    char    *string;    PARSE   *parse;    LIST    *list;    int     number;    char    *file;    int     line;} YYSTYPE;extern YYSTYPE yylval;void yymode( int n );void yyerror( char *s );int yyanyerrors();void yyfparse( char *s );int yyline();int yylex();int yyparse();void yyinput_stream( char** name, int* line );# define SCAN_NORMAL	0	/* normal parsing */# define SCAN_STRING	1	/* look only for matching } */# define SCAN_PUNCT	2	/* only punctuation keywords */