regexp/syntax: make Op an fmt.Stringer

Using stringer.

Fixes #22684.

Change-Id: I62fbde5dcb337cf269686615616bd39a27491ac1
Reviewed-on: https://go-review.googlesource.com/95355
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

diff --git a/src/regexp/syntax/op_string.go b/src/regexp/syntax/op_string.go
new file mode 100644 (file)
index 0000000..3952b2b
--- /dev/null
+++ b/src/regexp/syntax/op_string.go
@@ -0,0 +1,26 @@
+// Code generated by "stringer -type Op -trimprefix Op"; DO NOT EDIT.
+
+package syntax
+
+import "strconv"
+
+const (
+       _Op_name_0 = "NoMatchEmptyMatchLiteralCharClassAnyCharNotNLAnyCharBeginLineEndLineBeginTextEndTextWordBoundaryNoWordBoundaryCaptureStarPlusQuestRepeatConcatAlternate"
+       _Op_name_1 = "opPseudo"
+)
+
+var (
+       _Op_index_0 = [...]uint8{0, 7, 17, 24, 33, 45, 52, 61, 68, 77, 84, 96, 110, 117, 121, 125, 130, 136, 142, 151}
+)
+
+func (i Op) String() string {
+       switch {
+       case 1 <= i && i <= 19:
+               i -= 1
+               return _Op_name_0[_Op_index_0[i]:_Op_index_0[i+1]]
+       case i == 128:
+               return _Op_name_1
+       default:
+               return "Op(" + strconv.FormatInt(int64(i), 10) + ")"
+       }
+}

diff --git a/src/regexp/syntax/regexp.go b/src/regexp/syntax/regexp.go
index 0fe9269f255541ba1d8e16dd05a24780c1c10083..7b703f22e25794712ea1a3e7624aaad70b6fb690 100644 (file)
--- a/src/regexp/syntax/regexp.go
+++ b/src/regexp/syntax/regexp.go
@@ -27,6 +27,8 @@ type Regexp struct {
        Name     string     // capturing name, for OpCapture
 }
 
+//go:generate stringer -type Op -trimprefix Op
+
 // An Op is a single regular expression operator.
 type Op uint8