diff options
author | Russ Cox <rsc@golang.org> | 2011-03-15 14:05:37 -0400 |
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committer | Russ Cox <rsc@golang.org> | 2011-03-15 14:05:37 -0400 |
commit | e25b86678651914f1249352abd593dfc44dfe8c5 (patch) | |
tree | 6ddf3dbe71790b3c66b162bb16a7fa61971fd3fa /test/label.go | |
parent | 60d7b302ce82e0fb2254e02a685044b6b62e9656 (diff) | |
download | go-e25b86678651914f1249352abd593dfc44dfe8c5.tar.gz |
gc: diagnose unused labels
R=ken2
CC=golang-dev
http://codereview.appspot.com/4287047
Diffstat (limited to 'test/label.go')
-rw-r--r-- | test/label.go | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/test/label.go b/test/label.go new file mode 100644 index 000000000..ab231232a --- /dev/null +++ b/test/label.go @@ -0,0 +1,60 @@ +// errchk $G -e $D/$F.go + +// Copyright 2011 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. + +// Pass 1 label errors. + +package main + +var x int + +func f() { +L1: // ERROR "label L1 defined and not used" + for { + } +L2: // ERROR "label L2 defined and not used" + select { + } +L3: // ERROR "label L3 defined and not used" + switch { + } +L4: // ERROR "label L4 defined and not used" + if true { + } +L5: // ERROR "label L5 defined and not used" + f() +L6: + f() +L6: // ERROR "label L6 already defined at" + f() + if x == 20 { + goto L6 + } + +L7: + for { + break L7 + } + +L8: + for { + if x == 21 { + continue L8 + } + } + +L9: + switch { + case true: + break L9 + defalt: // ERROR "label defalt defined and not used" + } + +L10: + select { + default: + break L10 + } +} |