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redefinition

This commit is contained in:
Rui Ueyama 2020-09-23 20:57:17 +09:00
parent 2ed3fdafa3
commit 395308c77b
1 changed files with 20 additions and 6 deletions
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20
parse.c
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@ -3163,15 +3163,29 @@ static Token *function(Token *tok, Type *basety, VarAttr *attr) {
Type *ty = declarator(&tok, tok, basety); Type *ty = declarator(&tok, tok, basety);
if (!ty->name) if (!ty->name)
error_tok(ty->name_pos, "function name omitted"); error_tok(ty->name_pos, "function name omitted");
char *name_str = get_ident(ty->name);
Obj *fn = new_gvar(get_ident(ty->name), ty); Obj *fn = find_func(name_str);
if (fn) {
// Redeclaration
if (!fn->is_function)
error_tok(tok, "redeclared as a different kind of symbol");
if (fn->is_definition && equal(tok, "{"))
error_tok(tok, "redefinition of %s", name_str);
if (!fn->is_static && attr->is_static)
error_tok(tok, "static declaration follows a non-static declaration");
fn->is_definition = fn->is_definition || equal(tok, "{");
} else {
fn = new_gvar(name_str, ty);
fn->is_function = true; fn->is_function = true;
fn->is_definition = !consume(&tok, tok, ";"); fn->is_definition = equal(tok, "{");
fn->is_static = attr->is_static || (attr->is_inline && !attr->is_extern); fn->is_static = attr->is_static || (attr->is_inline && !attr->is_extern);
fn->is_inline = attr->is_inline; fn->is_inline = attr->is_inline;
}
fn->is_root = !(fn->is_static && fn->is_inline); fn->is_root = !(fn->is_static && fn->is_inline);
if (!fn->is_definition) if (consume(&tok, tok, ";"))
return tok; return tok;
current_fn = fn; current_fn = fn;