scc

Simple C99 Compiler
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commit d3f766992c8196bd3fdd8f34577598ecaedaa0d7
parent 298745960166f4881f8203e9353b36a9f5603ef1
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Tue,  2 Jul 2013 21:22:28 +0200

Catch a pointer to the current function

We need know where we are in the code, and having a pointer to the current
function allow us can check for example the returning value in a easy way.

Diffstat:
decl.c | 10++++------
flow.c | 3+--
symbol.h | 1+
3 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/decl.c b/decl.c @@ -9,7 +9,7 @@ #include "symbol.h" char parser_out_home; - +struct ctype *curfun; static void declarator(void); @@ -140,15 +140,13 @@ static void listdcl(register struct ctype *tp) { do { - register struct ctype *new; - declarator(); - new = decl_type(tp); - if (!new->type) { + curfun = decl_type(tp); + if (!curfun->type) { warning_error(options.implicit, "type defaults to 'int' in declaration of '%s'", yytext); - } else if (new->type == FTN && yytoken == '{') { + } else if (curfun->type == FTN && yytoken == '{') { struct node *np = compound(); prtree(np); putchar('\n'); diff --git a/flow.c b/flow.c @@ -178,12 +178,11 @@ static struct node * _return(void) { register struct node *np; - extern struct ctype *curfun; expect(RETURN); - /* TODO: Check the type of the function, can be void */ np = expr(); expect(';'); + return node1(ORETURN, np); } diff --git a/symbol.h b/symbol.h @@ -48,6 +48,7 @@ struct symbol { struct symbol *hash; }; +extern struct ctype *curfun; extern struct type tchar, tshort, tint, tulong, tllong, tvoid, tkeyword; extern struct type tfloat, tdouble, tldouble, tlong;