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Make lex more pedant friendly.

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This commit is contained in:
wkj 2004-05-16 07:59:27 +00:00
parent a87f4771c7
commit eb43e9ba97
3 changed files with 5 additions and 2 deletions
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2
src/cmd/lex/header.c
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@ -85,7 +85,7 @@ void
phead2(void) phead2(void)
{ {
Bprint(&fout,"while((nstr = yylook()) >= 0)\n"); Bprint(&fout,"while((nstr = yylook()) >= 0)\n");
Bprint(&fout,"yyfussy: switch(nstr){\n"); Bprint(&fout,"goto yyfussy;\nyyfussy: switch(nstr){\n");
Bprint(&fout,"case 0:\n"); Bprint(&fout,"case 0:\n");
Bprint(&fout,"if(yywrap()) return(0); break;\n"); Bprint(&fout,"if(yywrap()) return(0); break;\n");
} }

3
src/cmd/lex/ncform
View file

@ -11,6 +11,7 @@ int yyprevious = YYNEWLINE;
# ifdef LEXDEBUG # ifdef LEXDEBUG
extern void allprint(char); extern void allprint(char);
# endif # endif
int
yylook(void){ yylook(void){
struct yysvf *yystate, **lsp; struct yysvf *yystate, **lsp;
struct yywork *yyt; struct yywork *yyt;
@ -158,6 +159,7 @@ yylook(void){
} }
return(0); /* shut up the compiler; i have no idea what should be returned */ return(0); /* shut up the compiler; i have no idea what should be returned */
} }
int
yyback(int *p, int m) yyback(int *p, int m)
{ {
if (p==0) return(0); if (p==0) return(0);
@ -169,6 +171,7 @@ while (*p)
return(0); return(0);
} }
/* the following are only used in the lex library */ /* the following are only used in the lex library */
int
yyinput(void){ yyinput(void){
if(yyin == ((void*)0)) if(yyin == ((void*)0))
yyin = stdin; yyin = stdin;

2
src/cmd/lex/parser.y
View file

@ -240,7 +240,7 @@ yylex(void)
case '%': case '%':
lgate(); lgate();
Bprint(&fout,"#define YYNEWLINE %d\n",'\n'); Bprint(&fout,"#define YYNEWLINE %d\n",'\n');
Bprint(&fout,"yylex(void){\nint nstr; extern int yyprevious;\n"); Bprint(&fout,"int\nyylex(void){\nint nstr; extern int yyprevious;\nif(yyprevious){}\n");
sectbegin = TRUE; sectbegin = TRUE;
i = treesize*(sizeof(*name)+sizeof(*left)+ i = treesize*(sizeof(*name)+sizeof(*left)+
sizeof(*right)+sizeof(*nullstr)+sizeof(*parent))+ALITTLEEXTRA; sizeof(*right)+sizeof(*nullstr)+sizeof(*parent))+ALITTLEEXTRA;