Function TestStdlibCompat_BackReferences

stdlib_compat_test.go:1389–1427

(t *testing.T)

}

func TestStdlibCompat_BackReferences(t *testing.T) {
	// Note: Go regexp does not support backreferences, so these should
	// match behavior in treating \1 etc. as octal escapes or errors
	patterns := []struct {
		pattern string
		input   string
		wantErr bool
	}{
		// Valid patterns (no backreferences in Go regexp)
		{`(a)\1`, "aa", false}, // Go treats \1 as octal 1 (SOH character)
	}

	for _, tc := range patterns {
		t.Run(tc.pattern, func(t *testing.T) {
			stdRe, stdErr := regexp.Compile(tc.pattern)
			cgRe, cgErr := Compile(tc.pattern)

			// Both should have same compile behavior
			if (stdErr == nil) != (cgErr == nil) {
				t.Errorf("Compile error mismatch:\n  stdlib: %v\n  coregex: %v",
					stdErr, cgErr)
				return
			}

			if stdErr != nil {
				return // Both failed, consistent
			}

			// Compare behavior
			stdMatch := stdRe.MatchString(tc.input)
			cgMatch := cgRe.MatchString(tc.input)

			if stdMatch != cgMatch {
				t.Errorf("MatchString(%q, %q):\n  stdlib: %v\n  coregex: %v",
					tc.pattern, tc.input, stdMatch, cgMatch)
			}
		})
	}
}

func TestStdlibCompat_PerlFlags(t *testing.T) {
	// Known differences: combined flags with case-insensitive matching