*: use Go 1.22+ ranging over integers

Signed-off-by: Roman Khimov <[email protected]>

Author: roman-khimov

Diff for: bench_test.go

@@ -144,7 +144,7 @@ func BenchmarkDecoderStream(b *testing.B) {
 	}
 	ones := strings.Repeat(" 1\n", 300000) + "\n\n\n"
 	b.StartTimer()
-	for i := 0; i < b.N; i++ {
+	for i := range b.N {
 		if i%300000 == 0 {
 			buf.WriteString(ones)
 		}

Diff for: encode.go

@@ -783,7 +783,7 @@ type arrayEncoder struct {
 func (ae *arrayEncoder) encode(e *encodeState, v reflect.Value, opts encOpts) {
 	e.WriteByte('[')
 	n := v.Len()
-	for i := 0; i < n; i++ {
+	for i := range n {
 		if i > 0 {
 			e.WriteByte(',')
 		}
@@ -1152,7 +1152,7 @@ func typeFields(t reflect.Type) []field {
 			visited[f.typ] = true
 
 			// Scan f.typ for fields to include.
-			for i := 0; i < f.typ.NumField(); i++ {
+			for i := range f.typ.NumField() {
 				sf := f.typ.Field(i)
 				if sf.PkgPath != "" && (!sf.Anonymous || sf.Type.Kind() != reflect.Struct) { // unexported
 					continue

Diff for: indent.go

@@ -60,7 +60,7 @@ func compact(dst *bytes.Buffer, src []byte, escape bool) error {
 func newline(dst *bytes.Buffer, prefix, indent string, depth int) {
 	dst.WriteByte('\n')
 	dst.WriteString(prefix)
-	for i := 0; i < depth; i++ {
+	for range depth {
 		dst.WriteString(indent)
 	}
 }

Diff for: number_test.go

@@ -119,15 +119,15 @@ func TestNumberIsValid(t *testing.T) {
 
 func BenchmarkNumberIsValid(b *testing.B) {
 	s := "-61657.61667E+61673"
-	for i := 0; i < b.N; i++ {
+	for range b.N {
 		isValidNumber(s)
 	}
 }
 
 func BenchmarkNumberIsValidRegexp(b *testing.B) {
 	var jsonNumberRegexp = regexp.MustCompile(`^-?(?:0|[1-9]\d*)(?:\.\d+)?(?:[eE][+-]?\d+)?$`)
 	s := "-61657.61667E+61673"
-	for i := 0; i < b.N; i++ {
+	for range b.N {
 		jsonNumberRegexp.MatchString(s)
 	}
 }

Diff for: scanner_test.go

@@ -231,7 +231,7 @@ var benchScan scanner
 func BenchmarkSkipValue(b *testing.B) {
 	initBig()
 	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+	for range b.N {
 		_, _, _ = nextValue(jsonBig, &benchScan)
 	}
 	b.SetBytes(int64(len(jsonBig)))
@@ -330,7 +330,7 @@ func genMap(n int) map[string]any {
 		f = 1
 	}
 	x := make(map[string]any)
-	for i := 0; i < f; i++ {
+	for i := range f {
 		x[genString(10)] = genValue(((i+1)*n)/f - (i*n)/f)
 	}
 	return x