go source for verification 2026-05-22

test/method1.go

@@ -0,0 +1,24 @@
+// 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"