Regexp: succeed on empty match at end of input

2025-04-02 14:06:12 -06:00
parent 1892a97070
commit 4e157f7a0e
2 changed files with 9 additions and 1 deletions
--- a/bytes/regexp_test.go
+++ b/bytes/regexp_test.go
@ -61,6 +61,14 @@ func TestRegexp(t *testing.T) {
 		must.NoError(t, err)
 		test.StrContains(t, result.Message().Got(), "hella")
 	})
+	t.Run("succeeds on empty matches", func(t *testing.T) {
+		p := pbytes.Regexp(".*")
+		result, err := p(gigaparsec.MakeState(strings.NewReader("")))
+		succeeded, value, _ := result.Status()
+		must.NoError(t, err)
+		must.True(t, succeeded)
+		must.EqOp(t, "", value)
+	})
 }

 func TestRuneReader(t *testing.T) {