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cmd/gofmt: clear pattern match map at the correct time

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We need to clear the pattern match map after the recursive rewrite
applications, otherwise there might be lingering entries that cause
match to fail.

Fixes #18987.

Change-Id: I7913951c455c98932bda790861db6a860ebad032
Reviewed-on: https://go-review.googlesource.com/36546
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Matthew Dempsky 2017-02-07 15:29:18 -08:00
parent 87ad863f35
commit e410d2a81e
3 changed files with 23 additions and 1 deletions
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2
src/cmd/gofmt/rewrite.go
View File

@ -66,10 +66,10 @@ func rewriteFile(pattern, replace ast.Expr, p *ast.File) *ast.File {
if !val.IsValid() { if !val.IsValid() {
return reflect.Value{} return reflect.Value{}
} }
val = apply(rewriteVal, val)
for k := range m { for k := range m {
delete(m, k) delete(m, k)
} }
val = apply(rewriteVal, val)
if match(m, pat, val) { if match(m, pat, val) {
val = subst(m, repl, reflect.ValueOf(val.Interface().(ast.Node).Pos())) val = subst(m, repl, reflect.ValueOf(val.Interface().(ast.Node).Pos()))
} }

11
src/cmd/gofmt/testdata/rewrite9.golden vendored Normal file
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@ -0,0 +1,11 @@
//gofmt -r=a&&b!=2->a
// Copyright 2017 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.
// Issue 18987.
package p
const _ = x != 1

11
src/cmd/gofmt/testdata/rewrite9.input vendored Normal file
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@ -0,0 +1,11 @@
//gofmt -r=a&&b!=2->a
// Copyright 2017 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.
// Issue 18987.
package p
const _ = x != 1 && x != 2