Allow a user specified parameter to 'yyparse()', in a manner similar to
that used by bison. The names are consistent with the bison implementation but this one also allows the type of the parameter to be specified. For a desired prototype of: int yyparse __P((struct yyresult *)); and compile like this: yacc -dv grammar.y cc -c -DYYPARSE_PARAM_TYPE="struct yyresult *" \ -DYYPARSE_PARAM="parm" y.tab.c and use like this: ${ #include "usrtypes.h" #include "usrproto.h" }$ %token NUMBER %% goal : NUMBER { parm->value = yylval; } ; If YYPARSE_PARAM_TYPE isn't specified then "void *" is the default type. If YYPARSE_PARAM is not specified then the generated code behaves exactly as traditional byacc. PR: 13562 Submitted by: W Gerald Hicks <wghicks@bellsouth.net>
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=52569
@ -67,10 +67,6 @@ char *banner[] =
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"#define yyclearin (yychar=(YYEMPTY))",
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"#define yyerrok (yyerrflag=0)",
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"#define YYRECOVERING() (yyerrflag!=0)",
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#if 0
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"extern int yylex();",
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"extern int yyparse();",
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#endif
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"static int yygrowstack();",
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0
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};
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@ -163,12 +159,19 @@ char *body[] =
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"#define YYACCEPT goto yyaccept",
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"#define YYERROR goto yyerrlab",
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"",
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"int",
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"#if defined(__cplusplus) || __STDC__",
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"yyparse(void)",
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"#ifndef YYPARSE_PARAM",
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"#define YYPARSE_PARAM",
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"#define YYPARSE_PARAM_DECL",
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"#else",
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"yyparse()",
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"#ifndef YYPARSE_PARAM_TYPE",
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"#define YYPARSE_PARAM_TYPE void *",
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"#endif",
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"#define YYPARSE_PARAM_DECL YYPARSE_PARAM_TYPE YYPARSE_PARAM;",
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"#endif",
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"",
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"int",
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"yyparse (YYPARSE_PARAM)",
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" YYPARSE_PARAM_DECL",
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"{",
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" register int yym, yyn, yystate;",
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"#if YYDEBUG",
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