shithub: scc

Download patch

ref: 6363b621d371ca732a5a63212199bd059cd507d0
parent: 17de97a568d0c405dba08f9a5356fefcf687b3ac
author: Roberto E. Vargas Caballero <k0ga@shike2.com>
date: Mon Sep 23 17:02:03 EDT 2013

Allow registration of defined symbols in namespace

namespace registers the symbol detected in the lexical analysis
in a namespace. At the moment, it raised an error when we try
register again a name in the same namespace, but this is not
the behaviour we want in the case of forward declarations, so
we need a way of indicating this case. After this change
alloc > 0 means allocate a new symbol if no defined, alloc == 0
means no allocate a new symbol if no defined and raises an error
and alloc < 0 means no raises an error when the symbol is already
defined.

--- a/decl.c

+++ b/decl.c

@@ -14,7 +14,7 @@

 static void declarator(struct ctype *tp, unsigned char ns);

 static struct symbol *

-namespace(register unsigned char ns, unsigned char alloc)

+namespace(register unsigned char ns, signed char alloc)

 {

 	register struct symbol *sym = yyval.sym;

 	unsigned char yyns = sym->ns;

@@ -31,6 +31,8 @@

 			sym->ns = ns;

 			return sym;

 		} else if (yyns == ns && sym->ctx == curctx) {

+			if (alloc < 0)

+				return sym;

 			error("redeclaration of '%s'", yytext);

 		}

 		return lookup(yytext, ns);

-- 

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