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fix method function type compare bug (again)

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R=ken
OCL=17819
CL=17819
This commit is contained in:
Russ Cox 2008-10-24 14:56:54 -07:00
parent c14c961ae4
commit 689b28fd96
4 changed files with 46 additions and 10 deletions
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15
src/cmd/gc/dcl.c
View File

@ -279,8 +279,10 @@ addmethod(Node *n, Type *t, int local)
d = f;
continue;
}
if(!eqtype(t, f->type, 0))
if(!eqtype(t, f->type, 0)) {
yyerror("method redeclared: %S of type %S", sf, st);
print("\t%T\n\t%T\n", f->type, t);
}
return;
}
@ -337,10 +339,13 @@ funchdr(Node *n)
// check for same types
if(on != N) {
if(eqtype(n->type, on->type, 0)) {
if(!eqargs(n->type, on->type))
yyerror("forward declarations not the same: %S", s);
if(!eqargs(n->type, on->type)) {
yyerror("function arg names changed: %S", s);
print("\t%T\n\t%T\n", on->type, n->type);
}
} else {
yyerror("redeclare of function: %S", s);
yyerror("function redeclared: %S", s);
print("\t%T\n\t%T\n", on->type, n->type);
on = N;
}
}
@ -674,7 +679,7 @@ addvar(Node *n, Type *t, int ctxt)
if(s->vblock == block) {
if(s->oname != N) {
yyerror("var %S redeclared in this block"
"\n previous declaration at %L",
"\n\tprevious declaration at %L",
s, s->oname->lineno);
} else
yyerror("var %S redeclared in this block", s);

17
src/cmd/gc/subr.c
View File

@ -1763,9 +1763,11 @@ eqtype(Type *t1, Type *t2, int d)
return 1;
case TFUNC:
// Loop over structs: receiver, in, out.
t1 = t1->type;
t2 = t2->type;
for(;;) {
Type *ta, *tb;
if(t1 == t2)
break;
if(t1 == T || t2 == T)
@ -1773,8 +1775,19 @@ eqtype(Type *t1, Type *t2, int d)
if(t1->etype != TSTRUCT || t2->etype != TSTRUCT)
return 0;
if(!eqtype(t1->type, t2->type, 0))
return 0;
// Loop over fields in structs, checking type only.
ta = t1->type;
tb = t2->type;
while(ta != tb) {
if(ta == T || tb == T)
return 0;
if(ta->etype != TFIELD || tb->etype != TFIELD)
return 0;
if(!eqtype(ta->type, tb->type, 0))
return 0;
ta = ta->down;
tb = tb->down;
}
t1 = t1->down;
t2 = t2->down;

6
test/golden.out
View File

@ -182,9 +182,9 @@ fixedbugs/bug029.go:6: syntax error near int
=========== fixedbugs/bug035.go
fixedbugs/bug035.go:6: var i redeclared in this block
previous declaration at fixedbugs/bug035.go:5
previous declaration at fixedbugs/bug035.go:5
fixedbugs/bug035.go:7: var f redeclared in this block
previous declaration at fixedbugs/bug035.go:5
previous declaration at fixedbugs/bug035.go:5
=========== fixedbugs/bug037.go
fixedbugs/bug037.go:6: vlong: undefined
@ -193,7 +193,7 @@ fixedbugs/bug037.go:6: illegal types for operand: AS
=========== fixedbugs/bug039.go
fixedbugs/bug039.go:6: var x redeclared in this block
previous declaration at fixedbugs/bug039.go:5
previous declaration at fixedbugs/bug039.go:5
=========== fixedbugs/bug049.go
fixedbugs/bug049.go:6: illegal conversion of nil to string

18
test/method1.go Normal file
View File

@ -0,0 +1,18 @@
// errchk $G $D/$F.go
// Copyright 2009 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.
package main
type T struct { }
func (t *T) M(int, string);
func (t *T) M(int, float) { } // ERROR "redeclared"
func f(int, string);
func f(int, float) { } // ERROR "redeclared"
func g(a int, b string);
func g(a int, c string); // ERROR "names changed"