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go/test/method1.go
Robert Griesemer 7398c3c0c6 cmd/compile: use "method T.m already declared" for method redeclaration errors
Compromise between old compiler error "T.m redeclared in this block"
(where the "in this block" is not particularly helpful) and the old
type-checker error "method m already declared for type T ...".
In the case where we have position information for the original
declaration, the error message is "method T.m already declared at
<position>". The new message is both shorter and more precise.

For #55326.

Change-Id: Id4a7f326fe631b11db9e8030eccb417c72d6c7db
Reviewed-on: https://go-review.googlesource.com/c/go/+/435016
Run-TryBot: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-09-27 21:59:19 +00:00

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Go

// errorcheck
// 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.
// Verify that method redeclarations are caught by the compiler.
// Does not compile.
package main
type T struct{}
func (t *T) M(int, string) // GCCGO_ERROR "previous"
func (t *T) M(int, float64) {} // ERROR "already declared|redefinition"
func (t T) H() // GCCGO_ERROR "previous"
func (t *T) H() {} // ERROR "already declared|redefinition"
func f(int, string) // GCCGO_ERROR "previous"
func f(int, float64) {} // ERROR "redeclared|redefinition"
func g(a int, b string) // GCCGO_ERROR "previous"
func g(a int, c string) // ERROR "redeclared|redefinition"