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gc: check parameter declarations in interface fields
Fixes #1663. Fixes #1871. R=rsc, lstoakes CC=golang-dev https://golang.org/cl/4530084
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@ -523,6 +523,30 @@ colas(NodeList *left, NodeList *right)
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return as;
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}
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/*
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* declare the arguments in an
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* interface field declaration.
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*/
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void
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ifacedcl(Node *n)
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{
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if(n->op != ODCLFIELD || n->right == N)
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fatal("ifacedcl");
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dclcontext = PAUTO;
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markdcl();
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funcdepth++;
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n->outer = curfn;
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curfn = n;
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funcargs(n->right);
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// funcbody is normally called after the parser has
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// seen the body of a function but since an interface
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// field declaration does not have a body, we must
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// call it now to pop the current declaration context.
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funcbody(n);
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}
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/*
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* declare the function proper
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* and declare the arguments.
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@ -870,6 +870,7 @@ void funcbody(Node *n);
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void funccompile(Node *n, int isclosure);
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void funchdr(Node *n);
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Type* functype(Node *this, NodeList *in, NodeList *out);
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void ifacedcl(Node *n);
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int isifacemethod(Type *f);
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void markdcl(void);
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Node* methodname(Node *n, Type *t);
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@ -1380,6 +1380,7 @@ interfacedcl:
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new_name indcl
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{
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$$ = nod(ODCLFIELD, $1, $2);
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ifacedcl($$);
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}
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| packname
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{
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24
test/fixedbugs/bug342.go
Normal file
24
test/fixedbugs/bug342.go
Normal file
@ -0,0 +1,24 @@
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// errchk $G $D/$F.go
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Issue 1871.
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package p
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type a interface {
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foo(x int) (x int) // ERROR "redeclared|redefinition"
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}
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var b interface {
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bar(y int) (y int) // ERROR "redeclared|redefinition"
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}
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/*
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Previously:
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bug.go:1 x redclared in this block
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previous declaration at bug.go:1
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*/
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