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allow copy to be used without a return value

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R=rsc
https://golang.org/cl/156060
This commit is contained in:
Ken Thompson 2009-11-17 22:00:59 -08:00
parent 41554e2528
commit 01c2de0c15
1 changed files with 11 additions and 11 deletions
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22
src/cmd/gc/typecheck.c
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@ -762,7 +762,7 @@ reswitch:
goto ret; goto ret;
case OCOPY: case OCOPY:
ok |= Erv; ok |= Etop|Erv;
args = n->list; args = n->list;
if(args == nil || args->next == nil) { if(args == nil || args->next == nil) {
yyerror("missing arguments to copy"); yyerror("missing arguments to copy");
@ -772,19 +772,19 @@ reswitch:
yyerror("too many arguments to copy"); yyerror("too many arguments to copy");
goto error; goto error;
} }
typecheck(&args->n, Erv);
typecheck(&args->next->n, Erv);
if(!isslice(args->n->type) || !isslice(args->next->n->type)) {
yyerror("arguments to copy must be slices");
goto error;
}
if(!eqtype(args->n->type, args->next->n->type)) {
yyerror("arguments to copy must be slices of the same type");
goto error;
}
n->left = args->n; n->left = args->n;
n->right = args->next->n; n->right = args->next->n;
n->type = types[TINT]; n->type = types[TINT];
typecheck(&n->left, Erv);
typecheck(&n->right, Erv);
if(!isslice(n->left->type) || !isslice(n->right->type)) {
yyerror("arguments to copy must be slices");
goto error;
}
if(!eqtype(n->left->type, n->right->type)) {
yyerror("arguments to copy must be slices of the same type");
goto error;
}
goto ret; goto ret;
case OCONV: case OCONV: