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gc: bug294

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Fixes #800.

R=ken2
CC=golang-dev
https://golang.org/cl/1855043
This commit is contained in:
Russ Cox 2010-07-15 16:42:32 -07:00
parent ece6a8c549
commit 4c0de303ce
2 changed files with 102 additions and 18 deletions
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41
src/cmd/gc/walk.c
View File

@ -720,8 +720,8 @@ walkexpr(Node **np, NodeList **init)
goto ret;
walkexpr(&n->left, init);
walkexprlist(n->list, init);
ll = ascompatte(n->op, getinarg(t), n->list, 0, init);
lr = ascompatte(n->op, getthis(t), list1(n->left->left), 0, init);
ll = ascompatte(n->op, getthis(t), list1(n->left->left), 0, init);
lr = ascompatte(n->op, getinarg(t), n->list, 0, init);
ll = concat(ll, lr);
n->left->left = N;
ullmancalc(n->left);
@ -1474,47 +1474,51 @@ mkdotargslice(NodeList *lr0, NodeList *nn, Type *l, int fp, NodeList **init)
/*
* helpers for shape errors
*/
static void
static char*
dumptypes(Type **nl, char *what)
{
int first;
Type *l;
Iter savel;
Fmt fmt;
fmtstrinit(&fmt);
fmtprint(&fmt, "\t");
l = structfirst(&savel, nl);
print("\t");
first = 1;
for(l = structfirst(&savel, nl); l != T; l = structnext(&savel)) {
if(first)
first = 0;
else
print(", ");
print("%T", l);
fmtprint(&fmt, ", ");
fmtprint(&fmt, "%T", l);
}
if(first)
print("[no arguments %s]", what);
print("\n");
fmtprint(&fmt, "[no arguments %s]", what);
return fmtstrflush(&fmt);
}
static void
static char*
dumpnodetypes(NodeList *l, char *what)
{
int first;
Node *r;
Fmt fmt;
print("\t");
fmtstrinit(&fmt);
fmtprint(&fmt, "\t");
first = 1;
for(; l; l=l->next) {
r = l->n;
if(first)
first = 0;
else
print(", ");
print("%T", r->type);
fmtprint(&fmt, ", ");
fmtprint(&fmt, "%T", r->type);
}
if(first)
print("[no arguments %s]", what);
print("\n");
fmtprint(&fmt, "[no arguments %s]", what);
return fmtstrflush(&fmt);
}
/*
@ -1530,6 +1534,7 @@ ascompatte(int op, Type **nl, NodeList *lr, int fp, NodeList **init)
Node *r, *a;
NodeList *nn, *lr0, *alist;
Iter savel;
char *l1, *l2;
lr0 = lr;
l = structfirst(&savel, nl);
@ -1594,12 +1599,12 @@ loop:
if(l == T || r == N) {
if(l != T || r != N) {
l1 = dumptypes(nl, "expected");
l2 = dumpnodetypes(lr0, "given");
if(l != T)
yyerror("not enough arguments to %O", op);
yyerror("not enough arguments to %O\n%s\n%s", op, l1, l2);
else
yyerror("too many arguments to %O", op);
dumptypes(nl, "expected");
dumpnodetypes(lr0, "given");
yyerror("too many arguments to %O\n%s\n%s", op, l1, l2);
}
goto ret;
}

79
test/fixedbugs/bug294.go Normal file
View File

@ -0,0 +1,79 @@
// $G $D/$F.go && $L $F.$A && ./$A.out
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// http://code.google.com/p/go/issues/detail?id=800
package main
var log string
type T int
func (t T) a(s string) T {
log += "a(" + s + ")"
return t
}
func (T) b(s string) string {
log += "b"
return s
}
type F func(s string) F
func a(s string) F {
log += "a(" + s + ")"
return F(a)
}
func b(s string) string {
log += "b"
return s
}
type I interface {
a(s string) I
b(s string) string
}
type T1 int
func (t T1) a(s string) I {
log += "a(" + s + ")"
return t
}
func (T1) b(s string) string {
log += "b"
return s
}
var ok = true
func bad() {
if !ok {
println("BUG")
ok = false
}
println(log)
}
func main() {
var t T
if t.a("1").a(t.b("2")); log != "a(1)ba(2)" {
bad()
}
log = ""
if a("3")(b("4"))(b("5")); log != "a(3)ba(4)ba(5)" {
bad()
}
log = ""
var i I = T1(0)
if i.a("6").a(i.b("7")).a(i.b("8")).a(i.b("9")); log != "a(6)ba(7)ba(8)ba(9)" {
bad()
}
}