From 94430937ac9330a4c7e8ed23659bc4475f520739 Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Mon, 17 Dec 2012 11:05:58 -0500 Subject: [PATCH] test: add "duplicate" struct map key test Update #4555. R=gri, iant CC=golang-dev https://golang.org/cl/6944059 --- test/initializerr.go | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/test/initializerr.go b/test/initializerr.go index 48908c34786..ca05414554d 100644 --- a/test/initializerr.go +++ b/test/initializerr.go @@ -26,3 +26,15 @@ var a5 = []byte { x: 2 } // ERROR "index" var ok1 = S { } // should be ok var ok2 = T { S: ok1 } // should be ok + +// These keys can be computed at compile time but they are +// not constants as defined by the spec, so they do not trigger +// compile-time errors about duplicate key values. +// See issue 4555. + +type Key struct {X, Y int} + +var _ = map[Key]string{ + Key{1,2}: "hello", + Key{1,2}: "world", +}