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filepath: updates doc to give case where WalkFunc info arg may be nil

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If a filepath.WalkFunc is called with an non-nil err argument, it's possible
that the info argument will be nil. The comment above filepath.WalkFunc now
reflects this.

Fixes #26425

Change-Id: Ib9963b3344587d2993f1698c5a801f2d1286856b
GitHub-Last-Rev: 553fc266b5
GitHub-Pull-Request: golang/go#26435
Reviewed-on: https://go-review.googlesource.com/124635
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Jack 2018-07-18 19:12:14 +00:00 committed by Ian Lance Taylor
parent d2f663c4f2
commit 4016de0daf
1 changed files with 7 additions and 6 deletions
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13
src/path/filepath/path.go
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@ -341,12 +341,13 @@ var SkipDir = errors.New("skip this directory")
//
// If there was a problem walking to the file or directory named by path, the
// incoming error will describe the problem and the function can decide how
// to handle that error (and Walk will not descend into that directory). If
// an error is returned, processing stops. The sole exception is when the function
// returns the special value SkipDir. If the function returns SkipDir when invoked
// on a directory, Walk skips the directory's contents entirely.
// If the function returns SkipDir when invoked on a non-directory file,
// Walk skips the remaining files in the containing directory.
// to handle that error (and Walk will not descend into that directory). In the
// case of an error, the info argument will be nil. If an error is returned,
// processing stops. The sole exception is when the function returns the special
// value SkipDir. If the function returns SkipDir when invoked on a directory,
// Walk skips the directory's contents entirely. If the function returns SkipDir
// when invoked on a non-directory file, Walk skips the remaining files in the
// containing directory.
type WalkFunc func(path string, info os.FileInfo, err error) error
var lstat = os.Lstat // for testing