refactor: modernize code (#7850)

Enable the
[`modernize`](https://golangci-lint.run/docs/linters/configuration/#modernize)
linter in the golangci-lint configuration and fix the reported issues by
running `golangci-lint run --enable-only modernize --fix`. The
`modernize` linter is internally the same as [gopls
modernize](https://pkg.go.dev/golang.org/x/tools/go/analysis/passes/modernize).

Similar to #7089.

.golangci.yml

@@ -16,6 +16,7 @@ linters:
     - govet
     - ineffassign
     - misspell
+    - modernize
     - perfsprint
     - revive
     - staticcheck
@@ -111,6 +112,9 @@ linters:
       locale: US
       ignore-rules:
         - cancelled
+    modernize:
+      disable:
+        - omitzero
     perfsprint:
       int-conversion: true
       err-error: true

attribute/hash_test.go

@@ -53,12 +53,12 @@ func TestHashKVsEquality(t *testing.T) {
 	result = append(result, testcase{hashKVs(nil), nil})
 
 	for _, key := range keys {
-		for i := 0; i < len(keyVals); i++ {
+		for i := range keyVals {
 			kvs := []KeyValue{keyVals[i](key)}
 			hash := hashKVs(kvs)
 			result = append(result, testcase{hash, kvs})
 
-			for j := 0; j < len(keyVals); j++ {
+			for j := range keyVals {
 				kvs := []KeyValue{
 					keyVals[i](key),
 					keyVals[j](key),
@@ -66,7 +66,7 @@ func TestHashKVsEquality(t *testing.T) {
 				hash := hashKVs(kvs)
 				result = append(result, testcase{hash, kvs})
 
-				for k := 0; k < len(keyVals); k++ {
+				for k := range keyVals {
 					kvs := []KeyValue{
 						keyVals[i](key),
 						keyVals[j](key),

attribute/internal/attribute.go

@@ -13,32 +13,28 @@ import (
 
 // BoolSliceValue converts a bool slice into an array with same elements as slice.
 func BoolSliceValue(v []bool) any {
-	var zero bool
-	cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeOf(zero))).Elem()
+	cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeFor[bool]())).Elem()
 	reflect.Copy(cp, reflect.ValueOf(v))
 	return cp.Interface()
 }
 
 // Int64SliceValue converts an int64 slice into an array with same elements as slice.
 func Int64SliceValue(v []int64) any {
-	var zero int64
-	cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeOf(zero))).Elem()
+	cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeFor[int64]())).Elem()
 	reflect.Copy(cp, reflect.ValueOf(v))
 	return cp.Interface()
 }
 
 // Float64SliceValue converts a float64 slice into an array with same elements as slice.
 func Float64SliceValue(v []float64) any {
-	var zero float64
-	cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeOf(zero))).Elem()
+	cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeFor[float64]())).Elem()
 	reflect.Copy(cp, reflect.ValueOf(v))
 	return cp.Interface()
 }
 
 // StringSliceValue converts a string slice into an array with same elements as slice.
 func StringSliceValue(v []string) any {
-	var zero string
-	cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeOf(zero))).Elem()
+	cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeFor[string]())).Elem()
 	reflect.Copy(cp, reflect.ValueOf(v))
 	return cp.Interface()
 }

attribute/internal/attribute_test.go

@@ -101,8 +101,8 @@ var sync any
 func BenchmarkBoolSliceValue(b *testing.B) {
 	b.ReportAllocs()
 	s := []bool{true, false, true, false}
-	b.ResetTimer()
-	for n := 0; n < b.N; n++ {
+
+	for b.Loop() {
 		sync = BoolSliceValue(s)
 	}
 }
@@ -110,8 +110,8 @@ func BenchmarkBoolSliceValue(b *testing.B) {
 func BenchmarkInt64SliceValue(b *testing.B) {
 	b.ReportAllocs()
 	s := []int64{1, 2, 3, 4}
-	b.ResetTimer()
-	for n := 0; n < b.N; n++ {
+
+	for b.Loop() {
 		sync = Int64SliceValue(s)
 	}
 }
@@ -119,8 +119,8 @@ func BenchmarkInt64SliceValue(b *testing.B) {
 func BenchmarkFloat64SliceValue(b *testing.B) {
 	b.ReportAllocs()
 	s := []float64{1.2, 3.4, 5.6, 7.8}
-	b.ResetTimer()
-	for n := 0; n < b.N; n++ {
+
+	for b.Loop() {
 		sync = Float64SliceValue(s)
 	}
 }
@@ -128,8 +128,8 @@ func BenchmarkFloat64SliceValue(b *testing.B) {
 func BenchmarkStringSliceValue(b *testing.B) {
 	b.ReportAllocs()
 	s := []string{"a", "b", "c", "d"}
-	b.ResetTimer()
-	for n := 0; n < b.N; n++ {
+
+	for b.Loop() {
 		sync = StringSliceValue(s)
 	}
 }
@@ -137,9 +137,8 @@ func BenchmarkStringSliceValue(b *testing.B) {
 func BenchmarkAsFloat64Slice(b *testing.B) {
 	b.ReportAllocs()
 	var in any = [2]float64{1, 2.3}
-	b.ResetTimer()
 
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		sync = AsFloat64Slice(in)
 	}
 }

attribute/internal/xxhash/xxhash_test.go

@@ -143,9 +143,9 @@ func BenchmarkUint64KB(b *testing.B) {
 
 func BenchmarkUint64(b *testing.B) {
 	h := New()
-	b.ResetTimer()
+
 	b.ReportAllocs()
-	for i := 0; i < b.N; i++ {
+	for i := 0; b.Loop(); i++ {
 		h = h.Uint64(uint64(i))
 	}
 }
@@ -153,45 +153,45 @@ func BenchmarkUint64(b *testing.B) {
 func BenchmarkString(b *testing.B) {
 	h := New()
 	str := "benchmark_string_value"
-	b.ResetTimer()
+
 	b.ReportAllocs()
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		h = h.String(str)
 	}
 }
 
 func BenchmarkBool(b *testing.B) {
 	h := New()
-	b.ResetTimer()
+
 	b.ReportAllocs()
-	for i := 0; i < b.N; i++ {
+	for i := 0; b.Loop(); i++ {
 		h = h.Bool(i%2 == 0)
 	}
 }
 
 func BenchmarkFloat64(b *testing.B) {
 	h := New()
-	b.ResetTimer()
+
 	b.ReportAllocs()
-	for i := 0; i < b.N; i++ {
+	for i := 0; b.Loop(); i++ {
 		h = h.Float64(float64(i) * 3.14159)
 	}
 }
 
 func BenchmarkInt64(b *testing.B) {
 	h := New()
-	b.ResetTimer()
+
 	b.ReportAllocs()
-	for i := 0; i < b.N; i++ {
+	for i := 0; b.Loop(); i++ {
 		h = h.Int64(int64(i))
 	}
 }
 
 func BenchmarkSum64(b *testing.B) {
 	h := New().String("key").Uint64(42).Bool(true)
-	b.ResetTimer()
+
 	b.ReportAllocs()
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		_ = h.Sum64()
 	}
 }

attribute/set.go

@@ -58,7 +58,7 @@ func isComparable[T comparable](t T) T { return t }
 
 var (
 	// keyValueType is used in computeDistinctReflect.
-	keyValueType = reflect.TypeOf(KeyValue{})
+	keyValueType = reflect.TypeFor[KeyValue]()
 
 	// emptyHash is the hash of an empty set.
 	emptyHash = xxhash.New().Sum64()

attribute/set_test.go

@@ -314,7 +314,7 @@ func TestLookup(t *testing.T) {
 }
 
 func TestZeroSetExportedMethodsNoPanic(t *testing.T) {
-	rType := reflect.TypeOf((*attribute.Set)(nil))
+	rType := reflect.TypeFor[*attribute.Set]()
 	rVal := reflect.ValueOf(&attribute.Set{})
 	for n := 0; n < rType.NumMethod(); n++ {
 		mType := rType.Method(n)
@@ -552,12 +552,12 @@ func generateStringAttrsWithSize(keyLen, valueLen int) []attribute.KeyValue {
 	valueBase := ""
 
 	// Build key base string
-	for i := 0; i < keyLen; i++ {
+	for i := range keyLen {
 		keyBase += string(rune('a' + i%26))
 	}
 
 	// Build value base string
-	for i := 0; i < valueLen; i++ {
+	for i := range valueLen {
 		valueBase += string(rune('0' + i%10))
 	}
 

attribute/value.go

@@ -66,8 +66,7 @@ func IntValue(v int) Value {
 
 // IntSliceValue creates an INTSLICE Value.
 func IntSliceValue(v []int) Value {
-	var int64Val int64
-	cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeOf(int64Val)))
+	cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeFor[int64]()))
 	for i, val := range v {
 		cp.Elem().Index(i).SetInt(int64(val))
 	}

baggage/baggage.go

@@ -317,7 +317,7 @@ func parseMember(member string) (Member, error) {
 	keyValue, properties, found := strings.Cut(member, propertyDelimiter)
 	if found {
 		// Parse the member properties.
-		for _, pStr := range strings.Split(properties, propertyDelimiter) {
+		for pStr := range strings.SplitSeq(properties, propertyDelimiter) {
 			p, err := parseProperty(pStr)
 			if err != nil {
 				return newInvalidMember(), err
@@ -480,7 +480,7 @@ func Parse(bStr string) (Baggage, error) {
 	}
 
 	b := make(baggage.List)
-	for _, memberStr := range strings.Split(bStr, listDelimiter) {
+	for memberStr := range strings.SplitSeq(bStr, listDelimiter) {
 		m, err := parseMember(memberStr)
 		if err != nil {
 			return Baggage{}, err

baggage/baggage_test.go

@@ -1148,9 +1148,8 @@ func BenchmarkNew(b *testing.B) {
 	mem4, _ := NewMemberRaw("key4", "val4")
 
 	b.ReportAllocs()
-	b.ResetTimer()
 
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		benchBaggage, _ = New(mem1, mem2, mem3, mem4)
 	}
 }
@@ -1160,7 +1159,7 @@ var benchMember Member
 func BenchmarkNewMemberRaw(b *testing.B) {
 	b.ReportAllocs()
 
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		benchMember, _ = NewMemberRaw("key", "value")
 	}
 }
@@ -1168,7 +1167,7 @@ func BenchmarkNewMemberRaw(b *testing.B) {
 func BenchmarkParse(b *testing.B) {
 	b.ReportAllocs()
 
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		benchBaggage, _ = Parse(
 			"userId=alice,serverNode = DF28 , isProduction = false,hasProp=stuff;propKey;propWValue=value, invalidUtf8=pr%ffo%ffp%fcValue",
 		)
@@ -1192,9 +1191,8 @@ func BenchmarkString(b *testing.B) {
 	require.NoError(b, err)
 
 	b.ReportAllocs()
-	b.ResetTimer()
 
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		_ = bg.String()
 	}
 }
@@ -1229,8 +1227,8 @@ func BenchmarkMemberString(b *testing.B) {
 	member, err := NewMember(alphabet, alphabet, props...)
 	require.NoError(b, err)
 	b.ReportAllocs()
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+
+	for b.Loop() {
 		_ = member.String()
 	}
 }

exporters/otlp/otlplog/otlploggrpc/config.go

@@ -437,7 +437,7 @@ func loadInsecureFromEnvEndpoint(envEndpoint []string) resolver[bool] {
 func convHeaders(s string) (map[string]string, error) {
 	out := make(map[string]string)
 	var err error
-	for _, header := range strings.Split(s, ",") {
+	for header := range strings.SplitSeq(s, ",") {
 		rawKey, rawVal, found := strings.Cut(header, "=")
 		if !found {
 			err = errors.Join(err, fmt.Errorf("invalid header: %s", header))

exporters/otlp/otlplog/otlploghttp/config.go

@@ -599,7 +599,7 @@ func insecureFromScheme(prev setting[bool], scheme string) setting[bool] {
 func convHeaders(s string) (map[string]string, error) {
 	out := make(map[string]string)
 	var err error
-	for _, header := range strings.Split(s, ",") {
+	for header := range strings.SplitSeq(s, ",") {
 		rawKey, rawVal, found := strings.Cut(header, "=")
 		if !found {
 			err = errors.Join(err, fmt.Errorf("invalid header: %s", header))

exporters/prometheus/exporter_test.go

@@ -2749,11 +2749,11 @@ func TestExporterSelfInstrumentationConcurrency(t *testing.T) {
 	const numOperations = 100
 	var wg sync.WaitGroup
 
-	for i := 0; i < numGoroutines; i++ {
+	for i := range numGoroutines {
 		wg.Add(1)
 		go func(id int) {
 			defer wg.Done()
-			for j := 0; j < numOperations; j++ {
+			for j := range numOperations {
 				counter.Add(ctx, 1, otelmetric.WithAttributes(attribute.Int("goroutine", id)))
 
 				// Occasionally trigger collection

internal/global/benchmark_test.go

@@ -13,8 +13,8 @@ func BenchmarkStartEndSpanNoSDK(b *testing.B) {
 	ResetForTest(b)
 	t := TracerProvider().Tracer("Benchmark StartEndSpan")
 	ctx := b.Context()
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+
+	for b.Loop() {
 		_, span := t.Start(ctx, "/foo")
 		span.End()
 	}

internal/global/meter.go

@@ -157,7 +157,7 @@ func (m *meter) Int64Counter(name string, options ...metric.Int64CounterOption)
 	cfg := metric.NewInt64CounterConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*siCounter)(nil)),
+		kind:        reflect.TypeFor[*siCounter](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}
@@ -183,7 +183,7 @@ func (m *meter) Int64UpDownCounter(
 	cfg := metric.NewInt64UpDownCounterConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*siUpDownCounter)(nil)),
+		kind:        reflect.TypeFor[*siUpDownCounter](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}
@@ -206,7 +206,7 @@ func (m *meter) Int64Histogram(name string, options ...metric.Int64HistogramOpti
 	cfg := metric.NewInt64HistogramConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*siHistogram)(nil)),
+		kind:        reflect.TypeFor[*siHistogram](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}
@@ -229,7 +229,7 @@ func (m *meter) Int64Gauge(name string, options ...metric.Int64GaugeOption) (met
 	cfg := metric.NewInt64GaugeConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*siGauge)(nil)),
+		kind:        reflect.TypeFor[*siGauge](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}
@@ -255,7 +255,7 @@ func (m *meter) Int64ObservableCounter(
 	cfg := metric.NewInt64ObservableCounterConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*aiCounter)(nil)),
+		kind:        reflect.TypeFor[*aiCounter](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}
@@ -281,7 +281,7 @@ func (m *meter) Int64ObservableUpDownCounter(
 	cfg := metric.NewInt64ObservableUpDownCounterConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*aiUpDownCounter)(nil)),
+		kind:        reflect.TypeFor[*aiUpDownCounter](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}
@@ -307,7 +307,7 @@ func (m *meter) Int64ObservableGauge(
 	cfg := metric.NewInt64ObservableGaugeConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*aiGauge)(nil)),
+		kind:        reflect.TypeFor[*aiGauge](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}
@@ -330,7 +330,7 @@ func (m *meter) Float64Counter(name string, options ...metric.Float64CounterOpti
 	cfg := metric.NewFloat64CounterConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*sfCounter)(nil)),
+		kind:        reflect.TypeFor[*sfCounter](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}
@@ -356,7 +356,7 @@ func (m *meter) Float64UpDownCounter(
 	cfg := metric.NewFloat64UpDownCounterConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*sfUpDownCounter)(nil)),
+		kind:        reflect.TypeFor[*sfUpDownCounter](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}
@@ -382,7 +382,7 @@ func (m *meter) Float64Histogram(
 	cfg := metric.NewFloat64HistogramConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*sfHistogram)(nil)),
+		kind:        reflect.TypeFor[*sfHistogram](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}
@@ -405,7 +405,7 @@ func (m *meter) Float64Gauge(name string, options ...metric.Float64GaugeOption)
 	cfg := metric.NewFloat64GaugeConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*sfGauge)(nil)),
+		kind:        reflect.TypeFor[*sfGauge](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}
@@ -431,7 +431,7 @@ func (m *meter) Float64ObservableCounter(
 	cfg := metric.NewFloat64ObservableCounterConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*afCounter)(nil)),
+		kind:        reflect.TypeFor[*afCounter](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}
@@ -457,7 +457,7 @@ func (m *meter) Float64ObservableUpDownCounter(
 	cfg := metric.NewFloat64ObservableUpDownCounterConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*afUpDownCounter)(nil)),
+		kind:        reflect.TypeFor[*afUpDownCounter](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}
@@ -483,7 +483,7 @@ func (m *meter) Float64ObservableGauge(
 	cfg := metric.NewFloat64ObservableGaugeConfig(options...)
 	id := instID{
 		name:        name,
-		kind:        reflect.TypeOf((*afGauge)(nil)),
+		kind:        reflect.TypeFor[*afGauge](),
 		description: cfg.Description(),
 		unit:        cfg.Unit(),
 	}

log/noop/noop_test.go

@@ -17,11 +17,11 @@ func TestImplementationNoPanics(t *testing.T) {
 	// methods added to it than the No-Op implementation implements them.
 	t.Run("LoggerProvider", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(LoggerProvider{}),
-		reflect.TypeOf((*log.LoggerProvider)(nil)).Elem(),
+		reflect.TypeFor[log.LoggerProvider](),
 	))
 	t.Run("Logger", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Logger{}),
-		reflect.TypeOf((*log.Logger)(nil)).Elem(),
+		reflect.TypeFor[log.Logger](),
 	))
 }
 

metric/noop/noop_test.go

@@ -17,83 +17,83 @@ func TestImplementationNoPanics(t *testing.T) {
 	// methods added to it than the No-Op implementation implements them.
 	t.Run("MeterProvider", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(MeterProvider{}),
-		reflect.TypeOf((*metric.MeterProvider)(nil)).Elem(),
+		reflect.TypeFor[metric.MeterProvider](),
 	))
 	t.Run("Meter", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Meter{}),
-		reflect.TypeOf((*metric.Meter)(nil)).Elem(),
+		reflect.TypeFor[metric.Meter](),
 	))
 	t.Run("Observer", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Observer{}),
-		reflect.TypeOf((*metric.Observer)(nil)).Elem(),
+		reflect.TypeFor[metric.Observer](),
 	))
 	t.Run("Registration", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Registration{}),
-		reflect.TypeOf((*metric.Registration)(nil)).Elem(),
+		reflect.TypeFor[metric.Registration](),
 	))
 	t.Run("Int64Counter", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Int64Counter{}),
-		reflect.TypeOf((*metric.Int64Counter)(nil)).Elem(),
+		reflect.TypeFor[metric.Int64Counter](),
 	))
 	t.Run("Float64Counter", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Float64Counter{}),
-		reflect.TypeOf((*metric.Float64Counter)(nil)).Elem(),
+		reflect.TypeFor[metric.Float64Counter](),
 	))
 	t.Run("Int64UpDownCounter", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Int64UpDownCounter{}),
-		reflect.TypeOf((*metric.Int64UpDownCounter)(nil)).Elem(),
+		reflect.TypeFor[metric.Int64UpDownCounter](),
 	))
 	t.Run("Float64UpDownCounter", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Float64UpDownCounter{}),
-		reflect.TypeOf((*metric.Float64UpDownCounter)(nil)).Elem(),
+		reflect.TypeFor[metric.Float64UpDownCounter](),
 	))
 	t.Run("Int64Histogram", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Int64Histogram{}),
-		reflect.TypeOf((*metric.Int64Histogram)(nil)).Elem(),
+		reflect.TypeFor[metric.Int64Histogram](),
 	))
 	t.Run("Float64Histogram", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Float64Histogram{}),
-		reflect.TypeOf((*metric.Float64Histogram)(nil)).Elem(),
+		reflect.TypeFor[metric.Float64Histogram](),
 	))
 	t.Run("Int64Gauge", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Int64Gauge{}),
-		reflect.TypeOf((*metric.Int64Gauge)(nil)).Elem(),
+		reflect.TypeFor[metric.Int64Gauge](),
 	))
 	t.Run("Float64Gauge", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Float64Gauge{}),
-		reflect.TypeOf((*metric.Float64Gauge)(nil)).Elem(),
+		reflect.TypeFor[metric.Float64Gauge](),
 	))
 	t.Run("Int64ObservableCounter", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Int64ObservableCounter{}),
-		reflect.TypeOf((*metric.Int64ObservableCounter)(nil)).Elem(),
+		reflect.TypeFor[metric.Int64ObservableCounter](),
 	))
 	t.Run("Float64ObservableCounter", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Float64ObservableCounter{}),
-		reflect.TypeOf((*metric.Float64ObservableCounter)(nil)).Elem(),
+		reflect.TypeFor[metric.Float64ObservableCounter](),
 	))
 	t.Run("Int64ObservableGauge", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Int64ObservableGauge{}),
-		reflect.TypeOf((*metric.Int64ObservableGauge)(nil)).Elem(),
+		reflect.TypeFor[metric.Int64ObservableGauge](),
 	))
 	t.Run("Float64ObservableGauge", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Float64ObservableGauge{}),
-		reflect.TypeOf((*metric.Float64ObservableGauge)(nil)).Elem(),
+		reflect.TypeFor[metric.Float64ObservableGauge](),
 	))
 	t.Run("Int64ObservableUpDownCounter", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Int64ObservableUpDownCounter{}),
-		reflect.TypeOf((*metric.Int64ObservableUpDownCounter)(nil)).Elem(),
+		reflect.TypeFor[metric.Int64ObservableUpDownCounter](),
 	))
 	t.Run("Float64ObservableUpDownCounter", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Float64ObservableUpDownCounter{}),
-		reflect.TypeOf((*metric.Float64ObservableUpDownCounter)(nil)).Elem(),
+		reflect.TypeFor[metric.Float64ObservableUpDownCounter](),
 	))
 	t.Run("Int64Observer", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Int64Observer{}),
-		reflect.TypeOf((*metric.Int64Observer)(nil)).Elem(),
+		reflect.TypeFor[metric.Int64Observer](),
 	))
 	t.Run("Float64Observer", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Float64Observer{}),
-		reflect.TypeOf((*metric.Float64Observer)(nil)).Elem(),
+		reflect.TypeFor[metric.Float64Observer](),
 	))
 }
 

sdk/log/record.go

@@ -495,15 +495,7 @@ func (r *Record) applyValueLimitsAndDedup(val log.Value) log.Value {
 		sl := val.AsSlice()
 
 		// First check if any limits need to be applied.
-		needsChange := false
-		for _, v := range sl {
-			if r.needsValueLimitsOrDedup(v) {
-				needsChange = true
-				break
-			}
-		}
-
-		if needsChange {
+		if slices.ContainsFunc(sl, r.needsValueLimitsOrDedup) {
 			// Create a new slice to avoid modifying the original.
 			newSl := make([]log.Value, len(sl))
 			for i, item := range sl {
@@ -564,10 +556,8 @@ func (r *Record) needsValueLimitsOrDedup(val log.Value) bool {
 	case log.KindString:
 		return r.attributeValueLengthLimit >= 0 && len(val.AsString()) > r.attributeValueLengthLimit
 	case log.KindSlice:
-		for _, v := range val.AsSlice() {
-			if r.needsValueLimitsOrDedup(v) {
-				return true
-			}
+		if slices.ContainsFunc(val.AsSlice(), r.needsValueLimitsOrDedup) {
+			return true
 		}
 	case log.KindMap:
 		kvs := val.AsMap()
@@ -603,15 +593,7 @@ func (r *Record) dedupeBodyCollections(val log.Value) log.Value {
 		sl := val.AsSlice()
 
 		// Check if any nested values need deduplication.
-		needsChange := false
-		for _, item := range sl {
-			if r.needsBodyDedup(item) {
-				needsChange = true
-				break
-			}
-		}
-
-		if needsChange {
+		if slices.ContainsFunc(sl, r.needsBodyDedup) {
 			// Create a new slice to avoid modifying the original.
 			newSl := make([]log.Value, len(sl))
 			for i, item := range sl {
@@ -654,10 +636,8 @@ func (r *Record) dedupeBodyCollections(val log.Value) log.Value {
 func (r *Record) needsBodyDedup(val log.Value) bool {
 	switch val.Kind() {
 	case log.KindSlice:
-		for _, item := range val.AsSlice() {
-			if r.needsBodyDedup(item) {
-				return true
-			}
+		if slices.ContainsFunc(val.AsSlice(), r.needsBodyDedup) {
+			return true
 		}
 	case log.KindMap:
 		kvs := val.AsMap()

sdk/metric/manual_reader_test.go

@@ -328,7 +328,7 @@ func createMetricDataTestProducerForManual() testSDKProducer {
 
 			// Create multiple scopes for comprehensive test data
 			var scopeMetrics []metricdata.ScopeMetrics
-			for i := 0; i < 20; i++ { // 20 scopes with 4 metrics each = 80 total metrics
+			for i := range 20 { // 20 scopes with 4 metrics each = 80 total metrics
 				scopeMetrics = append(scopeMetrics, createScopeMetrics(i))
 			}
 

sdk/metric/periodic_reader_test.go

@@ -773,7 +773,7 @@ func createMetricDataTestProducer() testSDKProducer {
 
 			// Create multiple scopes for comprehensive test data
 			var scopeMetrics []metricdata.ScopeMetrics
-			for i := 0; i < 20; i++ { // 20 scopes with 4 metrics each = 80 total metrics
+			for i := range 20 { // 20 scopes with 4 metrics each = 80 total metrics
 				scopeMetrics = append(scopeMetrics, createScopeMetrics(i))
 			}
 

sdk/resource/host_id.go

@@ -60,8 +60,7 @@ func (r *hostIDReaderDarwin) read() (string, error) {
 		return "", err
 	}
 
-	lines := strings.Split(result, "\n")
-	for _, line := range lines {
+	for line := range strings.SplitSeq(result, "\n") {
 		if strings.Contains(line, "IOPlatformUUID") {
 			parts := strings.Split(line, " = ")
 			if len(parts) == 2 {

sdk/resource/os_release_unix_test.go

@@ -123,8 +123,6 @@ PROP3='Final value'`)
 	}
 
 	for _, tc := range tt {
-		tc := tc
-
 		t.Run(tc.Name, func(t *testing.T) {
 			result := resource.ParseOSReleaseFile(tc.OSRelease)
 			require.Equal(t, tc.Parsed, result)
@@ -152,8 +150,6 @@ func TestSkip(t *testing.T) {
 	}
 
 	for _, tc := range tt {
-		tc := tc
-
 		t.Run(tc.Name, func(t *testing.T) {
 			result := resource.Skip(tc.Line)
 			require.Equal(t, tc.Expected, result)
@@ -179,8 +175,6 @@ func TestParse(t *testing.T) {
 	}
 
 	for _, tc := range tt {
-		tc := tc
-
 		t.Run(tc.Name, func(t *testing.T) {
 			key, value, ok := resource.Parse(tc.Line)
 			require.Equal(t, tc.ExpectedKey, key)
@@ -219,8 +213,6 @@ func TestUnquote(t *testing.T) {
 	}
 
 	for _, tc := range tt {
-		tc := tc
-
 		t.Run(tc.Name, func(t *testing.T) {
 			result := resource.Unquote(tc.Text)
 			require.Equal(t, tc.Expected, result)
@@ -243,8 +235,6 @@ func TestUnescape(t *testing.T) {
 	}
 
 	for _, tc := range tt {
-		tc := tc
-
 		t.Run(tc.Name, func(t *testing.T) {
 			result := resource.Unescape(tc.Text)
 			require.Equal(t, tc.Expected, result)
@@ -285,8 +275,6 @@ func TestBuildOSRelease(t *testing.T) {
 	}
 
 	for _, tc := range tt {
-		tc := tc
-
 		t.Run(tc.Name, func(t *testing.T) {
 			result := resource.BuildOSRelease(tc.Values)
 			require.Equal(t, tc.Expected, result)

semconv/v1.34.0/error_type_test.go

@@ -23,7 +23,7 @@ func TestErrorType(t *testing.T) {
 	builtinErr := errors.New("something went wrong")
 	var nilErr error
 
-	wantCustomType := reflect.TypeOf(customErr)
+	wantCustomType := reflect.TypeFor[CustomError]()
 	wantCustomStr := fmt.Sprintf("%s.%s", wantCustomType.PkgPath(), wantCustomType.Name())
 
 	tests := []struct {

semconv/v1.36.0/error_type_test.go

@@ -23,7 +23,7 @@ func TestErrorType(t *testing.T) {
 	builtinErr := errors.New("something went wrong")
 	var nilErr error
 
-	wantCustomType := reflect.TypeOf(customErr)
+	wantCustomType := reflect.TypeFor[CustomError]()
 	wantCustomStr := fmt.Sprintf("%s.%s", wantCustomType.PkgPath(), wantCustomType.Name())
 
 	tests := []struct {

trace/noop/noop_test.go

@@ -17,15 +17,15 @@ func TestImplementationNoPanics(t *testing.T) {
 	// methods added to it than the No-Op implementation implements them.
 	t.Run("TracerProvider", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(TracerProvider{}),
-		reflect.TypeOf((*trace.TracerProvider)(nil)).Elem(),
+		reflect.TypeFor[trace.TracerProvider](),
 	))
 	t.Run("Tracer", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Tracer{}),
-		reflect.TypeOf((*trace.Tracer)(nil)).Elem(),
+		reflect.TypeFor[trace.Tracer](),
 	))
 	t.Run("Span", assertAllExportedMethodNoPanic(
 		reflect.ValueOf(Span{}),
-		reflect.TypeOf((*trace.Span)(nil)).Elem(),
+		reflect.TypeFor[trace.Span](),
 	))
 }