Require Go 1.23.0 or above (fixes #187) (#188)

cors_test.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"regexp"
+	"slices"
 	"strings"
 	"testing"
 )
@@ -37,11 +38,11 @@ func assertHeaders(t *testing.T, resHeaders http.Header, expHeaders http.Header)
 	for name, listBased := range allRespHeaders {
 		got := resHeaders[name]
 		want := expHeaders[name]
-		if !listBased && !slicesEqual(got, want) {
+		if !listBased && !slices.Equal(got, want) {
 			t.Errorf("Response header %q = %q, want %q", name, got, want)
 			continue
 		}
-		if listBased && !slicesEqual(normalize(got), normalize(want)) {
+		if listBased && !slices.Equal(normalize(got), normalize(want)) {
 			t.Errorf("Response header %q = %q, want %q", name, got, want)
 			continue
 		}
@@ -60,20 +61,6 @@ func normalize(s []string) (res []string) {
 	return
 }
 
-// TODO: when updating go directive to 1.21 or later,
-// use slices.Equal instead.
-func slicesEqual(s1, s2 []string) bool {
-	if len(s1) != len(s2) {
-		return false
-	}
-	for i := range s1 {
-		if s1[i] != s2[i] {
-			return false
-		}
-	}
-	return true
-}
-
 func assertResponse(t *testing.T, res *httptest.ResponseRecorder, responseCode int) {
 	t.Helper()
 	if responseCode != res.Code {

go.mod

@@ -1,3 +1,3 @@
 module github.com/rs/cors
 
-go 1.13
+go 1.23.0

internal/sortedset.go

@@ -181,21 +181,3 @@ func trimRightOWS(s string, n int) (string, bool) {
 	}
 	return s, true
 }
-
-// TODO: when updating go directive to 1.21 or later,
-// use min builtin instead.
-func min(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}
-
-// TODO: when updating go directive to 1.21 or later,
-// use max builtin instead.
-func max(a, b int) int {
-	if a > b {
-		return a
-	}
-	return b
-}

internal/sortedset_test.go

@@ -1,6 +1,7 @@
 package internal
 
 import (
+	"slices"
 	"strings"
 	"testing"
 )
@@ -180,7 +181,7 @@ func TestSortedSet(t *testing.T) {
 	}
 	for _, tc := range cases {
 		f := func(t *testing.T) {
-			elems := clone(tc.elems)
+			elems := slices.Clone(tc.elems)
 			set := NewSortedSet(tc.elems...)
 			size := set.Size()
 			if set.Size() != tc.size {
@@ -208,11 +209,3 @@ func TestSortedSet(t *testing.T) {
 		t.Run(tc.desc, f)
 	}
 }
-
-// adapted from https://pkg.go.dev/slices#Clone
-// TODO: when updating go directive to 1.21 or later,
-// use slices.Clone instead.
-func clone(s []string) []string {
-	// The s[:0:0] preserves nil in case it matters.
-	return append(s[:0:0], s...)
-}