.drone.yml

@@ -3,7 +3,7 @@ name: default
 
 steps:
 - name: test 
-  image: golang:1.18.1
+  image: golang:1.21.5
   volumes:
   - name: deps
     path: /go/src/mod
@@ -11,7 +11,7 @@ steps:
   - go test 
 
 - name: golangci-lint
-  image: golangci/golangci-lint:v1.49
+  image: golangci/golangci-lint:v1.55
   commands:
   - golangci-lint run
 

.golangci.yml

@@ -23,8 +23,9 @@ linters-settings:
       min-name-length: 2
       ignore-names:
         - err
-        - "n"
+        - n
         - i
+        - w
     tagliatelle:
       case:
         use-field-name: true
@@ -38,16 +39,19 @@ linters-settings:
 linters:
     enable-all: true
     disable:
-      - exhaustivestruct
+    # deprecated
-      - maligned
-      - deadcode
       - interfacer
-      - golint
+      - structcheck
       - varcheck
-      - nosnakecase
+      - golint
+      - deadcode
       - scopelint
+      - exhaustivestruct
       - ifshort
-      - structcheck
+      - nosnakecase
+      - maligned
+
+      - depguard # need configure
 
 issues:
   # Excluding configuration per-path, per-linter, per-text and per-source
@@ -57,3 +61,8 @@ issues:
         - gomnd
         - ireturn
         - exhaustruct
+        - gochecknoglobals
+    - path: _example_test\.go
+      linters:
+        - lll
+        - goerr113

bench_test.go

@@ -12,7 +12,6 @@ import (
 	"gitoa.ru/go-4devs/log/field"
 )
 
-//nolint:gochecknoglobals
 var (
 	errExample  = errors.New("fail")
 	_messages   = fakeMessages(1000)

field/encoder.go

@@ -1,32 +1,281 @@
+//nolint:gomnd
 package field
 
-import "time"
+import (
+	"fmt"
+	"strconv"
+	"time"
+	"unicode"
+	"unicode/utf8"
+)
 
-//nolint:interfacebloat
 type Encoder interface {
-	// Built-in types.
+	AppendField(dst []byte, field Field) []byte
-	AddArray(key string, value Value)
+	AppendValue(dst []byte, val Value) []byte
-	AddAny(key string, value Value)
+}
-	AddNil(key string)
+
-	AddBool(key string, value bool)
+func WithAppendString(fn func(dst []byte, in string) []byte) func(*BaseEncoder) {
-	AddBinary(key string, value []byte)
+	return func(be *BaseEncoder) {
-	AddInt(key string, value int)
+		be.AppendString = fn
-	AddInt8(key string, value int8)
+	}
-	AddInt16(key string, value int16)
+}
-	AddInt32(key string, value int32)
+
-	AddInt64(key string, value int64)
+func WithNullValue(in string) func(*BaseEncoder) {
-	AddUint(key string, value uint)
+	return func(be *BaseEncoder) {
-	AddUint8(key string, value uint8)
+		be.nullValue = []byte(in)
-	AddUint16(key string, value uint16)
+	}
-	AddUint32(key string, value uint32)
+}
-	AddUint64(key string, value uint64)
+
-	AddUintptr(key string, value uintptr)
+func WithDelimeter(in byte) func(*BaseEncoder) {
-	AddTime(key string, value time.Time)
+	return func(be *BaseEncoder) {
-	AddDuration(key string, value time.Duration)
+		be.delimeter = in
-	AddFloat32(key string, value float32)
+	}
-	AddFloat64(key string, value float64)
+}
-	AddComplex64(key string, value complex64)
+
-	AddComplex128(key string, value complex128)
+func WithGropuConfig(start, end, deli byte) func(*BaseEncoder) {
-	AddString(key, value string)
+	return func(be *BaseEncoder) {
-	AddError(key string, value error)
+		be.group = groupConfig{
+			start: start,
+			end:   end,
+			deli:  deli,
+		}
+	}
+}
+
+func WithDefaultValue(fn func(dst []byte, e Encoder, val Value) []byte) func(*BaseEncoder) {
+	return func(be *BaseEncoder) {
+		be.DefaultValue = fn
+	}
+}
+
+func NewEncoder(opts ...func(*BaseEncoder)) BaseEncoder {
+	be := BaseEncoder{
+		nullValue: []byte("null"),
+		group: groupConfig{
+			start: '{',
+			end:   '}',
+			deli:  ',',
+		},
+		array: groupConfig{
+			start: '[',
+			end:   ']',
+			deli:  ',',
+		},
+		timeFormat:   time.RFC3339,
+		AppendString: AppendString,
+		delimeter:    '=',
+		DefaultValue: func(dst []byte, e Encoder, val Value) []byte {
+			return e.AppendValue(dst, StringValue(fmt.Sprintf("%+v", val.Any())))
+		},
+	}
+
+	for _, opt := range opts {
+		opt(&be)
+	}
+
+	return be
+}
+
+type groupConfig struct {
+	start byte
+	end   byte
+	deli  byte
+}
+
+type BaseEncoder struct {
+	nullValue    []byte
+	group        groupConfig
+	array        groupConfig
+	timeFormat   string
+	AppendString func(dst []byte, in string) []byte
+	delimeter    byte
+	DefaultValue func(dst []byte, e Encoder, val Value) []byte
+}
+
+func (b BaseEncoder) AppendValue(dst []byte, val Value) []byte {
+	return b.appendValue(dst, val, "", 0)
+}
+
+func (b BaseEncoder) AppendDelimiter(dst []byte, deli byte) []byte {
+	if deli == 0 {
+		return dst
+	}
+
+	return append(dst, deli)
+}
+
+//nolint:gocyclo,cyclop
+func (b BaseEncoder) appendValue(dst []byte, val Value, prefix string, deli byte) []byte {
+	switch val.Kind {
+	case KindGroup:
+		return b.appendGroup(dst, val.AsGroup(), prefix)
+	case KindClosure:
+		return b.appendValue(dst, AnyValue(val.Resolve()), prefix, deli)
+	case KindArray:
+		return b.AppendArray(b.AppendDelimiter(dst, deli), val.AsArray())
+	case KindNil:
+		return b.AppendNull(b.AppendDelimiter(dst, deli))
+	case KindBool:
+		return b.AppendBool(b.AppendDelimiter(dst, deli), val.AsBool())
+	case KindBinary:
+		return b.AppendBytes(b.AppendDelimiter(dst, deli), val.AsBinary())
+	case KindComplex128:
+		return b.AppendComplex(b.AppendDelimiter(dst, deli), val.AsComplex128())
+	case KindInt64:
+		return b.AppendInt(b.AppendDelimiter(dst, deli), val.AsInt64())
+	case KindFloat32:
+		return b.AppendFloat(b.AppendDelimiter(dst, deli), float64(val.AsFloat32()), 32)
+	case KindFloat64:
+		return b.AppendFloat(b.AppendDelimiter(dst, deli), val.AsFloat64(), 64)
+	case KindUint64:
+		return b.AppendUint(b.AppendDelimiter(dst, deli), val.AsUint64())
+	case KindError:
+		return b.AppendString(b.AppendDelimiter(dst, deli), val.AsError().Error())
+	case KindString:
+		return b.AppendString(b.AppendDelimiter(dst, deli), val.AsString())
+	case KindDuration:
+		return b.AppendDuration(b.AppendDelimiter(dst, deli), val.AsDuration())
+	case KindTime:
+		return b.AppendTime(b.AppendDelimiter(dst, deli), val.AsTime())
+	case KindAny:
+		return b.DefaultValue(b.AppendDelimiter(dst, deli), b, val)
+	}
+
+	return b.DefaultValue(b.AppendDelimiter(dst, deli), b, val)
+}
+
+func (b BaseEncoder) AppendDuration(dst []byte, d time.Duration) []byte {
+	return b.AppendString(dst, d.String())
+}
+
+func (b BaseEncoder) AppendTime(dst []byte, t time.Time) []byte {
+	return b.AppendString(dst, t.Format(b.timeFormat))
+}
+
+func AppendString(dst []byte, in string) []byte {
+	if needsQuoting(in) {
+		return strconv.AppendQuote(dst, in)
+	}
+
+	return append(dst, in...)
+}
+
+//nolint:cyclop
+func needsQuoting(in string) bool {
+	if len(in) == 0 {
+		return true
+	}
+
+	for i := 0; i < len(in); {
+		char := in[i]
+		if char < utf8.RuneSelf {
+			// Quote anything except a backslash that would need quoting in a
+			// JSON string, as well as space and '='
+			if char != '\\' && (char == ' ' || char == '=' || !safeSet[char]) {
+				return true
+			}
+			i++
+
+			continue
+		}
+
+		decodeRune, size := utf8.DecodeRuneInString(in[i:])
+		if decodeRune == utf8.RuneError || unicode.IsSpace(decodeRune) || !unicode.IsPrint(decodeRune) {
+			return true
+		}
+
+		i += size
+	}
+
+	return false
+}
+
+func (b BaseEncoder) AppendField(dst []byte, field Field) []byte {
+	prefix := ""
+
+	if len(dst) != 0 {
+		prew := dst[len(dst)-1]
+		if prew != '{' && prew != '.' {
+			prefix = string(b.group.deli)
+		}
+	}
+
+	return b.appendField(dst, field, prefix, b.delimeter)
+}
+
+func (b BaseEncoder) appendField(dst []byte, field Field, prefix string, deli byte) []byte {
+	dst = b.AppendKey(dst, field.Key, prefix)
+
+	return b.appendValue(dst, field.Value, field.Key+".", deli)
+}
+
+func (b BaseEncoder) AppendKey(dst []byte, key string, prefix string) []byte {
+	if prefix != "" {
+		dst = append(dst, prefix...)
+	}
+
+	return b.AppendString(dst, key)
+}
+
+func (b BaseEncoder) AppendComplex(dst []byte, c complex128) []byte {
+	cmplx := strconv.FormatComplex(c, 'g', -1, 128)
+
+	return b.AppendString(dst, cmplx)
+}
+
+func (b BaseEncoder) AppendFloat(dst []byte, f float64, bitSize int) []byte {
+	return strconv.AppendFloat(dst, f, 'g', -1, bitSize)
+}
+
+func (b BaseEncoder) AppendUint(dst []byte, u uint64) []byte {
+	return strconv.AppendUint(dst, u, 10)
+}
+
+func (b BaseEncoder) AppendNull(dst []byte) []byte {
+	return append(dst, b.nullValue...)
+}
+
+func (b BaseEncoder) AppendInt(dst []byte, val int64) []byte {
+	return strconv.AppendInt(dst, val, 10)
+}
+
+func (b BaseEncoder) AppendBool(dst []byte, val bool) []byte {
+	return strconv.AppendBool(dst, val)
+}
+
+func (b BaseEncoder) AppendGroup(dst []byte, fields []Field) []byte {
+	dst = append(dst, b.group.start)
+	dst = b.appendGroup(dst, fields, "")
+
+	return append(dst, b.group.end)
+}
+
+func (b BaseEncoder) appendGroup(dst []byte, fields []Field, prefix string) []byte {
+	if len(fields) > 0 {
+		dst = b.appendField(dst, fields[0], ".", b.delimeter)
+		for _, field := range fields[1:] {
+			dst = b.appendField(append(dst, b.group.deli), field, prefix, b.delimeter)
+		}
+	}
+
+	return dst
+}
+
+func (b BaseEncoder) AppendArray(dst []byte, in []Value) []byte {
+	dst = append(dst, b.array.start)
+	if len(in) > 0 {
+		dst = b.appendValue(dst, in[0], "", 0)
+		for _, value := range in[1:] {
+			dst = b.appendValue(append(dst, b.array.deli), value, "", 0)
+		}
+	}
+
+	return append(dst, b.array.end)
+}
+
+func (b BaseEncoder) AppendBytes(dst, in []byte) []byte {
+	dst = append(dst, '"')
+	dst = append(dst, in...)
+
+	return append(dst, '"')
 }

field/encoder_json.go

@@ -0,0 +1,23 @@
+package field
+
+import (
+	"encoding/json"
+	"strconv"
+)
+
+func NewEncoderJSON(opts ...func(*BaseEncoder)) BaseEncoder {
+	opts = append([]func(*BaseEncoder){
+		WithAppendString(strconv.AppendQuote),
+		WithDelimeter(':'),
+		WithDefaultValue(func(dst []byte, e Encoder, val Value) []byte {
+			js, err := json.Marshal(val.Any())
+			if err != nil {
+				return e.AppendValue(dst, ErrorValue(err))
+			}
+
+			return append(dst, js...)
+		}),
+	}, opts...)
+
+	return NewEncoder(opts...)
+}

field/encoder_json_test.go

@@ -0,0 +1,38 @@
+package field_test
+
+import (
+	"testing"
+
+	"gitoa.ru/go-4devs/log/field"
+	"gitoa.ru/go-4devs/log/internal/buffer"
+)
+
+func TestEncoderJSONAppendField_string(t *testing.T) {
+	t.Parallel()
+
+	const expect = `"array":["value","other"],"str":"value","nullableStr":"value","nullstr":null`
+
+	encode := field.NewEncoderJSON()
+
+	buf := buffer.New()
+	defer func() {
+		buf.Free()
+	}()
+
+	val := "value"
+	strs := field.Strings("array", val, "other")
+	*buf = encode.AppendField(*buf, strs)
+
+	str := field.String("str", val)
+	*buf = encode.AppendField(*buf, str)
+
+	strp := field.Stringp("nullableStr", &val)
+	*buf = encode.AppendField(*buf, strp)
+
+	nullStr := field.Stringp("nullstr", nil)
+	*buf = encode.AppendField(*buf, nullStr)
+
+	if buf.String() != expect {
+		t.Errorf("json string expect:%v got:%s", expect, buf)
+	}
+}

field/encoder_text.go

@@ -0,0 +1,17 @@
+package field
+
+import (
+	"fmt"
+)
+
+func NewEncoderText(opts ...func(*BaseEncoder)) BaseEncoder {
+	opts = append([]func(*BaseEncoder){
+		WithGropuConfig(0, 0, ' '),
+		WithNullValue("<nil>"),
+		WithDefaultValue(func(dst []byte, _ Encoder, val Value) []byte {
+			return fmt.Appendf(dst, "%+v", val.Any())
+		}),
+	}, opts...)
+
+	return NewEncoder(opts...)
+}

field/errors.go

@@ -0,0 +1,5 @@
+package field
+
+import "errors"
+
+var ErrUndefined = errors.New("indefined")

field/field.go

@@ -5,329 +5,499 @@ import (
 	"time"
 )
 
-func Any(key string, value interface{}) Field {
+func Any(key string, value any) Field {
-	return Key(key).Any(value)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func String(key, value string) Field {
-	return Key(key).String(value)
+	return Field{
+		Key:   key,
+		Value: StringValue(value),
+	}
 }
 
 func Stringp(key string, value *string) Field {
-	return Key(key).Stringp(value)
+	return Field{
+		Key:   key,
+		Value: StringpValue(value),
+	}
 }
 
 func Strings(key string, value ...string) Field {
-	return Key(key).Strings(value...)
+	return Field{
+		Key:   key,
+		Value: StringsValue(value),
+	}
 }
 
 func Bool(key string, value bool) Field {
-	return Key(key).Bool(value)
+	return Field{
+		Key:   key,
+		Value: BoolValue(value),
+	}
 }
 
 func Bools(key string, value ...bool) Field {
-	return Key(key).Bools(value...)
+	return Field{
+		Key:   key,
+		Value: BoolsValue(value),
+	}
 }
 
 func Boolp(key string, value *bool) Field {
-	return Key(key).Boolp(value)
+	return Field{
+		Key:   key,
+		Value: BoolpValue(value),
+	}
 }
 
 func Uint(key string, value uint) Field {
-	return Key(key).Uint(value)
+	return Field{
+		Key:   key,
+		Value: Uint64Value(uint64(value)),
+	}
 }
 
 func Uints(key string, value ...uint) Field {
-	return Key(key).Uints(value...)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Uintp(key string, value *uint) Field {
-	return Key(key).Uintp(value)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Uint8(key string, value uint8) Field {
-	return Key(key).Uint8(value)
+	return Field{
+		Key:   key,
+		Value: Uint64Value(uint64(value)),
+	}
 }
 
 func Uint8s(key string, value ...uint8) Field {
-	return Key(key).Uint8s(value...)
+	return Field{
+		Key:   key,
+		Value: Uint8sValue(value),
+	}
 }
 
 func Uint8p(key string, value *uint8) Field {
-	return Key(key).Uint8p(value)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Uint16(key string, value uint16) Field {
-	return Key(key).Uint16(value)
+	return Field{
+		Key:   key,
+		Value: Uint64Value(uint64(value)),
+	}
 }
 
 func Uint16s(key string, value ...uint16) Field {
-	return Key(key).Uint16s(value...)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Uint16p(key string, value *uint16) Field {
-	return Key(key).Uint16p(value)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Uint32(key string, value uint32) Field {
-	return Key(key).Uint32(value)
+	return Field{
+		Key:   key,
+		Value: Uint64Value(uint64(value)),
+	}
 }
 
 func Uint32s(key string, value ...uint32) Field {
-	return Key(key).Uint32s(value...)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Uint32p(key string, value *uint32) Field {
-	return Key(key).Uint32p(value)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Uint64(key string, value uint64) Field {
-	return Key(key).Uint64(value)
+	return Field{
+		Key:   key,
+		Value: Uint64Value(value),
+	}
 }
 
 func Uint64s(key string, value ...uint64) Field {
-	return Key(key).Uint64s(value...)
+	return Field{
+		Key:   key,
+		Value: Uint64sValue(value),
+	}
 }
 
 func Uint64p(key string, value *uint64) Field {
-	return Key(key).Uint64p(value)
+	return Field{
+		Key:   key,
+		Value: Uint64pValue(value),
+	}
 }
 
 func Int(key string, value int) Field {
-	return Key(key).Int(value)
+	return Field{
+		Key:   key,
+		Value: Int64Value(int64(value)),
+	}
 }
 
 func Ints(key string, value ...int) Field {
-	return Key(key).Ints(value...)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Intp(key string, value *int) Field {
-	return Key(key).Intp(value)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Int8(key string, value int8) Field {
-	return Key(key).Int8(value)
+	return Field{
+		Key:   key,
+		Value: Int64Value(int64(value)),
+	}
 }
 
 func Int8s(key string, value ...int8) Field {
-	return Key(key).Int8s(value...)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Int8p(key string, value *int8) Field {
-	return Key(key).Int8p(value)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Int16(key string, value int16) Field {
-	return Key(key).Int16(value)
+	return Field{
+		Key:   key,
+		Value: Int64Value(int64(value)),
+	}
 }
 
 func Int16s(key string, value ...int16) Field {
-	return Key(key).Int16s(value...)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Int16p(key string, value *int16) Field {
-	return Key(key).Int16p(value)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Int32(key string, value int32) Field {
-	return Key(key).Int32(value)
+	return Field{
+		Key:   key,
+		Value: Int64Value(int64(value)),
+	}
 }
 
 func Int32s(key string, value ...int32) Field {
-	return Key(key).Int32s(value...)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Int32p(key string, value *int32) Field {
-	return Key(key).Int32p(value)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Int64(key string, value int64) Field {
-	return Key(key).Int64(value)
+	return Field{
+		Key:   key,
+		Value: Int64Value(value),
+	}
 }
 
 func Int64s(key string, value ...int64) Field {
-	return Key(key).Int64s(value...)
+	return Field{
+		Key:   key,
+		Value: Int64sValue(value),
+	}
 }
 
 func Int64p(key string, value *int64) Field {
-	return Key(key).Int64p(value)
+	return Field{
+		Key:   key,
+		Value: Int64pValue(value),
+	}
 }
 
 func Float32(key string, value float32) Field {
-	return Key(key).Float32(value)
+	return Field{
+		Key:   key,
+		Value: Float64Value(float64(value)),
+	}
 }
 
 func Float32s(key string, value ...float32) Field {
-	return Key(key).Float32s(value...)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Float32p(key string, value *float32) Field {
-	return Key(key).Float32p(value)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Float64(key string, value float64) Field {
-	return Key(key).Float64(value)
+	return Field{
+		Key:   key,
+		Value: Float64Value(value),
+	}
 }
 
 func Float64s(key string, value ...float64) Field {
-	return Key(key).Float64s(value...)
+	return Field{
+		Key:   key,
+		Value: Float64sValue(value),
+	}
 }
 
 func Float64p(key string, value *float64) Field {
-	return Key(key).Float64p(value)
+	return Field{
+		Key:   key,
+		Value: Float64pValue(value),
+	}
 }
 
 func Complex64(key string, value complex64) Field {
-	return Key(key).Complex64(value)
+	return Field{
+		Key:   key,
+		Value: Complex128Value(complex128(value)),
+	}
 }
 
 func Complex64s(key string, value ...complex64) Field {
-	return Key(key).Complex64s(value...)
+	return Field{
+		Key:   key,
+		Value: Complex64sValue(value),
+	}
 }
 
 func Complex64p(key string, value *complex64) Field {
-	return Key(key).Complex64p(value)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
+}
+
+func Complex128(key string, value complex128) Field {
+	return Field{
+		Key:   key,
+		Value: Complex128Value(value),
+	}
+}
+
+func Complex128s(key string, value ...complex128) Field {
+	return Field{
+		Key:   key,
+		Value: Complex128sValue(value),
+	}
+}
+
+func Complex128p(key string, value *complex128) Field {
+	return Field{
+		Key:   key,
+		Value: Complex128pValue(value),
+	}
 }
 
 func Uintptr(key string, value uintptr) Field {
-	return Key(key).Uintptr(value)
+	return Field{
+		Key:   key,
+		Value: Uint64Value(uint64(value)),
+	}
 }
 
 func Uintptrs(key string, value ...uintptr) Field {
-	return Key(key).Uintptrs(value...)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Uintptrp(key string, value *uintptr) Field {
-	return Key(key).Uintptrp(value)
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
 }
 
 func Bytes(key string, value []byte) Field {
-	return Key(key).Bytes(value)
+	return Field{
+		Key:   key,
+		Value: BytesValue(value),
+	}
 }
 
 func Duration(key string, value time.Duration) Field {
-	return Key(key).Dureation(value)
+	return Field{
+		Key:   key,
+		Value: DurationValue(value),
+	}
 }
 
 func Durations(key string, value ...time.Duration) Field {
-	return Key(key).Dureations(value)
+	return Field{
+		Key:   key,
+		Value: DurationsValue(value),
+	}
 }
 
 func Durationp(key string, value *time.Duration) Field {
-	return Key(key).Dureationp(value)
+	return Field{
+		Key:   key,
+		Value: DurationpValue(value),
+	}
 }
 
 func Time(key string, value time.Time) Field {
-	return Key(key).Time(value)
+	return Field{
+		Key:   key,
+		Value: TimeValue(value),
+	}
 }
 
 func Times(key string, value ...time.Time) Field {
-	return Key(key).Times(value...)
+	return Field{
+		Key:   key,
+		Value: TimesValue(value),
+	}
 }
 
 func Timep(key string, value *time.Time) Field {
-	return Key(key).Timep(value)
+	return Field{
+		Key:   key,
+		Value: TimepValue(value),
+	}
 }
 
 func FormatTime(key, format string, value time.Time) Field {
-	return Key(key).FormatTime(format, value)
+	return Field{
+		Key: key,
+		Value: ClosureValue(func() any {
+			return value.Format(format)
+		}),
+	}
 }
 
-func FormatTimes(key, foramt string, value ...time.Time) Field {
+func FormatTimes(key, format string, value ...time.Time) Field {
-	return Key(key).FormatTimes(foramt, value...)
+	return Field{
+		Key: key,
+		Value: ClosureValue(func() any {
+			times := make([]any, len(value))
+			for idx, val := range value {
+				times[idx] = val.Format(format)
+			}
+
+			return times
+		}),
+	}
 }
 
-func FormatTimep(key, foramt string, value *time.Time) Field {
+func FormatTimep(key, format string, value *time.Time) Field {
-	return Key(key).FormatTimep(foramt, value)
+	isNill := value == nil
+
+	return Field{
+		Key: key,
+		Value: ClosureValue(func() any {
+			if isNill {
+				return NilValue()
+			}
+
+			return value.Format(format)
+		}),
+	}
 }
 
 func Error(key string, value error) Field {
-	return Key(key).Error(value)
+	return Field{
+		Key:   key,
+		Value: ErrorValue(value),
+	}
 }
 
 func Errors(key string, value ...error) Field {
-	return Key(key).Errors(value...)
+	return Field{
+		Key:   key,
+		Value: ErrorsValue(value),
+	}
+}
+
+func Groups(key string, value ...Field) Field {
+	return Field{
+		Key:   key,
+		Value: GroupValue(value...),
+	}
+}
+
+func Valuer(key string, value LogValuer) Field {
+	return Field{
+		Key:   key,
+		Value: AnyValue(value),
+	}
+}
+
+func ValuerFn(key string, value ClosureFn) Field {
+	return Field{
+		Key:   key,
+		Value: ClosureValue(value),
+	}
 }
 
 // Field struct.
 type Field struct {
-	key   Key
+	Key   string
-	value Value
+	Value Value
-}
-
-//nolint:gocyclo,cyclop
-func (f Field) AddTo(enc Encoder) {
-	key := string(f.key)
-
-	switch {
-	case f.value.IsArray():
-		enc.AddArray(key, f.value)
-	case f.value.IsNil():
-		enc.AddNil(key)
-	case f.value.IsBool():
-		enc.AddBool(key, f.value.asBool())
-	case f.value.IsBinary():
-		enc.AddBinary(key, f.value.asBinary())
-	case f.value.IsInt():
-		enc.AddInt(key, f.value.asInt())
-	case f.value.IsInt8():
-		enc.AddInt8(key, f.value.asInt8())
-	case f.value.IsInt16():
-		enc.AddInt16(key, f.value.asInt16())
-	case f.value.IsInt32():
-		enc.AddInt32(key, f.value.asInt32())
-	case f.value.IsInt64():
-		enc.AddInt64(key, f.value.asInt64())
-	case f.value.IsUint():
-		enc.AddUint(key, f.value.asUint())
-	case f.value.IsUint8():
-		enc.AddUint8(key, f.value.asUint8())
-	case f.value.IsUint16():
-		enc.AddUint16(key, f.value.asUint16())
-	case f.value.IsUint32():
-		enc.AddUint32(key, f.value.asUint32())
-	case f.value.IsUint64():
-		enc.AddUint64(key, f.value.asUint64())
-	case f.value.IsUintptr():
-		enc.AddUintptr(key, f.value.asUintptr())
-	case f.value.IsTime():
-		enc.AddTime(key, f.value.asTime())
-	case f.value.IsDuration():
-		enc.AddDuration(key, f.value.asDuration())
-	case f.value.IsFloat32():
-		enc.AddFloat32(key, f.value.asFloat32())
-	case f.value.IsFloat64():
-		enc.AddFloat64(key, f.value.asFloat64())
-	case f.value.IsComplex64():
-		enc.AddComplex64(key, f.value.asComplex64())
-	case f.value.IsComplex128():
-		enc.AddComplex128(key, f.value.asComplex128())
-	case f.value.IsString():
-		enc.AddString(key, f.value.asString())
-	case f.value.IsError():
-		enc.AddError(key, f.value.asError())
-	default:
-		enc.AddAny(key, f.value)
-	}
-}
-
-func (f Field) Type() Type {
-	return f.value.vtype
-}
-
-func (f Field) Key() Key {
-	return f.key
-}
-
-func (f Field) Value() Value {
-	return f.value
-}
-
-func (f Field) AsInterface() interface{} {
-	return f.value.AsInterface()
 }
 
 // String implent stringer.
 func (f Field) String() string {
-	return fmt.Sprintf("%s=%+v", f.key, f.value.AsInterface())
+	return fmt.Sprintf("%s=%+v", f.Key, f.Value)
 }

field/fields.go

@@ -2,7 +2,22 @@ package field
 
 type Fields []Field
 
-type MapField map[Key]Value
+func (f Fields) Fields(fn func(Field) bool) {
+	for idx := range f {
+		if !fn(f[idx]) {
+			return
+		}
+	}
+}
+
+func (f Fields) Any() any {
+	fields := make(map[string]any)
+	for idx := range f {
+		fields[f[idx].Key] = f[idx].Value.Any()
+	}
+
+	return fields
+}
 
 func (f Fields) Append(fields ...Field) Fields {
 	f = append(f, fields...)
@@ -17,13 +32,3 @@ func (f Fields) Set(idx int, field Field) {
 func (f Fields) Len() int {
 	return len(f)
 }
-
-func (f Fields) AsMap() MapField {
-	fields := make(MapField, len(f))
-
-	for _, field := range f {
-		fields[field.Key()] = field.Value()
-	}
-
-	return fields
-}

field/key.go

@@ -1,570 +0,0 @@
-package field
-
-import (
-	"time"
-)
-
-type Key string
-
-//nolint:funlen,cyclop,gocyclo
-func (k Key) Any(value interface{}) Field {
-	switch val := value.(type) {
-	case string:
-		return k.String(val)
-	case *string:
-		return k.Stringp(val)
-	case []string:
-		return k.Strings(val...)
-	case bool:
-		return k.Bool(val)
-	case *bool:
-		return k.Boolp(val)
-	case []bool:
-		return k.Bools(val...)
-	case int8:
-		return k.Int8(val)
-	case []int8:
-		return k.Int8s(val...)
-	case *int8:
-		return k.Int8p(val)
-	case int16:
-		return k.Int16(val)
-	case []int16:
-		return k.Int16s(val...)
-	case *int16:
-		return k.Int16p(val)
-	case int32:
-		return k.Int32(val)
-	case []int32:
-		return k.Int32s(val...)
-	case *int32:
-		return k.Int32p(val)
-	case int64:
-		return k.Int64(val)
-	case []int64:
-		return k.Int64s(val...)
-	case *int64:
-		return k.Int64p(val)
-	case uint:
-		return k.Uint(val)
-	case []uint:
-		return k.Uints(val...)
-	case *uint:
-		return k.Uintp(val)
-	case uint8:
-		return k.Uint8(val)
-	case *uint8:
-		return k.Uint8p(val)
-	case uint16:
-		return k.Uint16(val)
-	case []uint16:
-		return k.Uint16s(val...)
-	case *uint16:
-		return k.Uint16p(val)
-	case uint32:
-		return k.Uint32(val)
-	case []uint32:
-		return k.Uint32s(val...)
-	case *uint32:
-		return k.Uint32p(val)
-	case uint64:
-		return k.Uint64(val)
-	case []uint64:
-		return k.Uint64s(val...)
-	case *uint64:
-		return k.Uint64p(val)
-	case float32:
-		return k.Float32(val)
-	case []float32:
-		return k.Float32s(val...)
-	case *float32:
-		return k.Float32p(val)
-	case float64:
-		return k.Float64(val)
-	case []float64:
-		return k.Float64s(val...)
-	case *float64:
-		return k.Float64p(val)
-	case complex64:
-		return k.Complex64(val)
-	case []complex64:
-		return k.Complex64s(val...)
-	case *complex64:
-		return k.Complex64p(val)
-	case uintptr:
-		return k.Uintptr(val)
-	case []uintptr:
-		return k.Uintptrs(val...)
-	case *uintptr:
-		return k.Uintptrp(val)
-	case []byte:
-		return k.Bytes(val)
-	case time.Duration:
-		return k.Dureation(val)
-	case []time.Duration:
-		return k.Dureations(val)
-	case *time.Duration:
-		return k.Dureationp(val)
-	case time.Time:
-		return k.Time(val)
-	case []time.Time:
-		return k.Times(val...)
-	case *time.Time:
-		return k.Timep(val)
-	case error:
-		return k.Error(val)
-	case []error:
-		return k.Errors(val...)
-	}
-
-	return Field{
-		key: k,
-		value: Value{
-			value:    value,
-			vtype:    TypeAny,
-			numeric:  0,
-			stringly: "",
-		},
-	}
-}
-
-func (k Key) String(value string) Field {
-	return Field{
-		key:   k,
-		value: stringValue(value),
-	}
-}
-
-func (k Key) Strings(value ...string) Field {
-	return Field{
-		key:   k,
-		value: stringsValue(value),
-	}
-}
-
-func (k Key) Stringp(value *string) Field {
-	return Field{
-		key:   k,
-		value: stringpValue(value),
-	}
-}
-
-func (k Key) Bool(value bool) Field {
-	return Field{
-		key:   k,
-		value: boolValue(value),
-	}
-}
-
-func (k Key) Bools(value ...bool) Field {
-	return Field{
-		key:   k,
-		value: boolsValue(value),
-	}
-}
-
-func (k Key) Boolp(value *bool) Field {
-	return Field{
-		key:   k,
-		value: boolpValue(value),
-	}
-}
-
-func (k Key) Int(value int) Field {
-	return Field{
-		key:   k,
-		value: intValue(value),
-	}
-}
-
-func (k Key) Ints(value ...int) Field {
-	return Field{
-		key:   k,
-		value: intsValue(value),
-	}
-}
-
-func (k Key) Intp(value *int) Field {
-	return Field{
-		key:   k,
-		value: intpValue(value),
-	}
-}
-
-func (k Key) Int8(value int8) Field {
-	return Field{
-		key:   k,
-		value: int8Value(value),
-	}
-}
-
-func (k Key) Int8s(value ...int8) Field {
-	return Field{
-		key:   k,
-		value: int8sValue(value),
-	}
-}
-
-func (k Key) Int8p(value *int8) Field {
-	return Field{
-		key:   k,
-		value: int8pValue(value),
-	}
-}
-
-func (k Key) Int16(value int16) Field {
-	return Field{
-		key:   k,
-		value: int16Value(value),
-	}
-}
-
-func (k Key) Int16s(value ...int16) Field {
-	return Field{
-		key:   k,
-		value: int16sValue(value),
-	}
-}
-
-func (k Key) Int16p(value *int16) Field {
-	return Field{
-		key:   k,
-		value: int16pValue(value),
-	}
-}
-
-func (k Key) Int32(value int32) Field {
-	return Field{
-		key:   k,
-		value: int32Value(value),
-	}
-}
-
-func (k Key) Int32s(value ...int32) Field {
-	return Field{
-		key:   k,
-		value: int32sValue(value),
-	}
-}
-
-func (k Key) Int32p(value *int32) Field {
-	return Field{
-		key:   k,
-		value: int32pValue(value),
-	}
-}
-
-func (k Key) Int64(value int64) Field {
-	return Field{
-		key:   k,
-		value: int64Value(value),
-	}
-}
-
-func (k Key) Int64s(value ...int64) Field {
-	return Field{
-		key:   k,
-		value: int64sValue(value),
-	}
-}
-
-func (k Key) Int64p(value *int64) Field {
-	return Field{
-		key:   k,
-		value: int64pValue(value),
-	}
-}
-
-func (k Key) Uint(value uint) Field {
-	return Field{
-		key:   k,
-		value: uintValue(value),
-	}
-}
-
-func (k Key) Uints(value ...uint) Field {
-	return Field{
-		key:   k,
-		value: uintsValue(value),
-	}
-}
-
-func (k Key) Uintp(value *uint) Field {
-	return Field{
-		key:   k,
-		value: uintpValue(value),
-	}
-}
-
-func (k Key) Uint8(value uint8) Field {
-	return Field{
-		key:   k,
-		value: uint8Value(value),
-	}
-}
-
-func (k Key) Uint8s(value ...uint8) Field {
-	return Field{
-		key:   k,
-		value: uint8sValue(value),
-	}
-}
-
-func (k Key) Uint8p(value *uint8) Field {
-	return Field{
-		key:   k,
-		value: uint8pValue(value),
-	}
-}
-
-func (k Key) Uint16(value uint16) Field {
-	return Field{
-		key:   k,
-		value: uint16Value(value),
-	}
-}
-
-func (k Key) Uint16s(value ...uint16) Field {
-	return Field{
-		key:   k,
-		value: uint16sValue(value),
-	}
-}
-
-func (k Key) Uint16p(value *uint16) Field {
-	return Field{
-		key:   k,
-		value: uint16pValue(value),
-	}
-}
-
-func (k Key) Uint32(value uint32) Field {
-	return Field{
-		key:   k,
-		value: uint32Value(value),
-	}
-}
-
-func (k Key) Uint32s(value ...uint32) Field {
-	return Field{
-		key:   k,
-		value: uint32sValue(value),
-	}
-}
-
-func (k Key) Uint32p(value *uint32) Field {
-	return Field{
-		key:   k,
-		value: uint32pValue(value),
-	}
-}
-
-func (k Key) Uint64(value uint64) Field {
-	return Field{
-		key:   k,
-		value: uint64Value(value),
-	}
-}
-
-func (k Key) Uint64s(value ...uint64) Field {
-	return Field{
-		key:   k,
-		value: uint64sValue(value),
-	}
-}
-
-func (k Key) Uint64p(value *uint64) Field {
-	return Field{
-		key:   k,
-		value: uint64pValue(value),
-	}
-}
-
-func (k Key) Float32(value float32) Field {
-	return Field{
-		key:   k,
-		value: float32Value(value),
-	}
-}
-
-func (k Key) Float32s(value ...float32) Field {
-	return Field{
-		key:   k,
-		value: float32sValue(value),
-	}
-}
-
-func (k Key) Float32p(value *float32) Field {
-	return Field{
-		key:   k,
-		value: float32pValue(value),
-	}
-}
-
-func (k Key) Float64(value float64) Field {
-	return Field{
-		key:   k,
-		value: float64Value(value),
-	}
-}
-
-func (k Key) Float64s(value ...float64) Field {
-	return Field{
-		key:   k,
-		value: float64sValue(value),
-	}
-}
-
-func (k Key) Float64p(value *float64) Field {
-	return Field{
-		key:   k,
-		value: float64pValue(value),
-	}
-}
-
-func (k Key) Complex64(value complex64) Field {
-	return Field{
-		key:   k,
-		value: complex64Value(value),
-	}
-}
-
-func (k Key) Complex64s(value ...complex64) Field {
-	return Field{
-		key:   k,
-		value: complex64sValue(value),
-	}
-}
-
-func (k Key) Complex64p(value *complex64) Field {
-	return Field{
-		key:   k,
-		value: complex64pValue(value),
-	}
-}
-
-func (k Key) Complex128(value complex128) Field {
-	return Field{
-		key:   k,
-		value: complex128Value(value),
-	}
-}
-
-func (k Key) Complex128s(value []complex128) Field {
-	return Field{
-		key:   k,
-		value: complex128sValue(value),
-	}
-}
-
-func (k Key) Complex128p(value *complex128) Field {
-	return Field{
-		key:   k,
-		value: complex128pValue(value),
-	}
-}
-
-func (k Key) Uintptr(value uintptr) Field {
-	return Field{
-		key:   k,
-		value: uintptrValue(value),
-	}
-}
-
-func (k Key) Uintptrs(value ...uintptr) Field {
-	return Field{
-		key:   k,
-		value: uintptrsValue(value),
-	}
-}
-
-func (k Key) Uintptrp(value *uintptr) Field {
-	return Field{
-		key:   k,
-		value: uintptrpValue(value),
-	}
-}
-
-func (k Key) Bytes(value []byte) Field {
-	return Field{
-		key:   k,
-		value: bytesValue(value),
-	}
-}
-
-func (k Key) Dureation(value time.Duration) Field {
-	return Field{
-		key:   k,
-		value: durationValue(value),
-	}
-}
-
-func (k Key) Dureations(value []time.Duration) Field {
-	return Field{
-		key:   k,
-		value: durationsValue(value),
-	}
-}
-
-func (k Key) Dureationp(value *time.Duration) Field {
-	return Field{
-		key:   k,
-		value: durationpValue(value),
-	}
-}
-
-func (k Key) Time(value time.Time) Field {
-	return Field{
-		key:   k,
-		value: timeValue(value),
-	}
-}
-
-func (k Key) Times(value ...time.Time) Field {
-	return Field{
-		key:   k,
-		value: timesValue(value),
-	}
-}
-
-func (k Key) Timep(value *time.Time) Field {
-	return Field{
-		key:   k,
-		value: timepValue(value),
-	}
-}
-
-func (k Key) FormatTime(format string, value time.Time) Field {
-	return Field{
-		key:   k,
-		value: formatTimeValue(format, value),
-	}
-}
-
-func (k Key) FormatTimes(format string, value ...time.Time) Field {
-	return Field{
-		key:   k,
-		value: formatTimesValue(format, value),
-	}
-}
-
-func (k Key) FormatTimep(format string, value *time.Time) Field {
-	return Field{
-		key:   k,
-		value: formatTimepValue(format, value),
-	}
-}
-
-func (k Key) Error(value error) Field {
-	return Field{
-		key:   k,
-		value: errorValue(value),
-	}
-}
-
-func (k Key) Errors(value ...error) Field {
-	return Field{
-		key:   k,
-		value: errorsValue(value),
-	}
-}

field/kind.go

@@ -0,0 +1,86 @@
+package field
+
+import "fmt"
+
+//go:generate stringer -type=Kind -linecomment -output=kind_string.go
+
+type Kind int
+
+const (
+	KindAny        Kind = iota // any
+	KindArray                  // array
+	KindNil                    // nil
+	KindString                 // string
+	KindBool                   // bool
+	KindInt64                  // int64
+	KindUint64                 // uint64
+	KindFloat32                // float32
+	KindFloat64                // float64
+	KindComplex128             // complex128
+	KindBinary                 // bytes
+	KindDuration               // duration
+	KindTime                   // time
+	KindError                  // error
+	KindGroup                  // group
+	KindClosure                // closure
+)
+
+func (l Kind) MarshalJSON() ([]byte, error) {
+	return []byte("\"" + l.String() + "\""), nil
+}
+
+func (l *Kind) UnmarshalJSON(in []byte) error {
+	return l.UnmarshalText(in[1 : len(in)-1])
+}
+
+func (l Kind) MarshalText() ([]byte, error) {
+	return []byte(l.String()), nil
+}
+
+//nolint:gocyclo,cyclop
+func (l *Kind) UnmarshalText(in []byte) error {
+	switch string(in) {
+	case KindAny.String():
+		*l = KindAny
+	case KindArray.String():
+		*l = KindArray
+	case KindNil.String():
+		*l = KindNil
+	case KindString.String():
+		*l = KindString
+	case KindBool.String():
+		*l = KindBool
+	case KindInt64.String():
+		*l = KindInt64
+	case KindUint64.String():
+		*l = KindUint64
+	case KindFloat32.String():
+		*l = KindFloat32
+	case KindFloat64.String():
+		*l = KindFloat64
+	case KindComplex128.String():
+		*l = KindComplex128
+	case KindBinary.String():
+		*l = KindBinary
+	case KindDuration.String():
+		*l = KindDuration
+	case KindTime.String():
+		*l = KindTime
+	case KindError.String():
+		*l = KindError
+	case KindGroup.String():
+		*l = KindGroup
+	case KindClosure.String():
+		*l = KindClosure
+	}
+
+	return fmt.Errorf("%w:filed(%v)", ErrUndefined, string(in))
+}
+
+func (l Kind) MarshalBinary() ([]byte, error) {
+	return []byte(l.String()), nil
+}
+
+func (l *Kind) UnmarshalBinary(in []byte) error {
+	return l.UnmarshalText(in)
+}

field/kind_string.go

@@ -0,0 +1,38 @@
+// Code generated by "stringer -type=Kind -linecomment -output=kind_string.go"; DO NOT EDIT.
+
+package field
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[KindAny-0]
+	_ = x[KindArray-1]
+	_ = x[KindNil-2]
+	_ = x[KindString-3]
+	_ = x[KindBool-4]
+	_ = x[KindInt64-5]
+	_ = x[KindUint64-6]
+	_ = x[KindFloat32-7]
+	_ = x[KindFloat64-8]
+	_ = x[KindComplex128-9]
+	_ = x[KindBinary-10]
+	_ = x[KindDuration-11]
+	_ = x[KindTime-12]
+	_ = x[KindError-13]
+	_ = x[KindGroup-14]
+	_ = x[KindClosure-15]
+}
+
+const _Kind_name = "anyarraynilstringboolint64uint64float32float64complex128bytesdurationtimeerrorgroupclosure"
+
+var _Kind_index = [...]uint8{0, 3, 8, 11, 17, 21, 26, 32, 39, 46, 56, 61, 69, 73, 78, 83, 90}
+
+func (i Kind) String() string {
+	if i < 0 || i >= Kind(len(_Kind_index)-1) {
+		return "Kind(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _Kind_name[_Kind_index[i]:_Kind_index[i+1]]
+}

field/log_valuer.go

@@ -0,0 +1,11 @@
+package field
+
+type LogValuer interface {
+	LogValue() any
+}
+
+type ClosureFn func() any
+
+func (v ClosureFn) LogValue() any {
+	return v()
+}

field/safe_set.go

@@ -0,0 +1,112 @@
+package field
+
+import "unicode/utf8"
+
+// Copied from encoding/json/tables.go.
+//
+// safeSet holds the value true if the ASCII character with the given array
+// position can be represented inside a JSON string without any further
+// escaping.
+//
+// All values are true except for the ASCII control characters (0-31), the
+// double quote ("), and the backslash character ("\").
+//
+//nolint:gochecknoglobals
+var safeSet = [utf8.RuneSelf]bool{
+	' ':      true,
+	'!':      true,
+	'"':      false,
+	'#':      true,
+	'$':      true,
+	'%':      true,
+	'&':      true,
+	'\'':     true,
+	'(':      true,
+	')':      true,
+	'*':      true,
+	'+':      true,
+	',':      true,
+	'-':      true,
+	'.':      true,
+	'/':      true,
+	'0':      true,
+	'1':      true,
+	'2':      true,
+	'3':      true,
+	'4':      true,
+	'5':      true,
+	'6':      true,
+	'7':      true,
+	'8':      true,
+	'9':      true,
+	':':      true,
+	';':      true,
+	'<':      true,
+	'=':      true,
+	'>':      true,
+	'?':      true,
+	'@':      true,
+	'A':      true,
+	'B':      true,
+	'C':      true,
+	'D':      true,
+	'E':      true,
+	'F':      true,
+	'G':      true,
+	'H':      true,
+	'I':      true,
+	'J':      true,
+	'K':      true,
+	'L':      true,
+	'M':      true,
+	'N':      true,
+	'O':      true,
+	'P':      true,
+	'Q':      true,
+	'R':      true,
+	'S':      true,
+	'T':      true,
+	'U':      true,
+	'V':      true,
+	'W':      true,
+	'X':      true,
+	'Y':      true,
+	'Z':      true,
+	'[':      true,
+	'\\':     false,
+	']':      true,
+	'^':      true,
+	'_':      true,
+	'`':      true,
+	'a':      true,
+	'b':      true,
+	'c':      true,
+	'd':      true,
+	'e':      true,
+	'f':      true,
+	'g':      true,
+	'h':      true,
+	'i':      true,
+	'j':      true,
+	'k':      true,
+	'l':      true,
+	'm':      true,
+	'n':      true,
+	'o':      true,
+	'p':      true,
+	'q':      true,
+	'r':      true,
+	's':      true,
+	't':      true,
+	'u':      true,
+	'v':      true,
+	'w':      true,
+	'x':      true,
+	'y':      true,
+	'z':      true,
+	'{':      true,
+	'|':      true,
+	'}':      true,
+	'~':      true,
+	'\u007f': true,
+}

field/type.go

@@ -1,126 +0,0 @@
-package field
-
-type Type uint32
-
-const (
-	TypeAny        Type = 1 << iota // any
-	TypeArray                       // array
-	TypeNil                         // nil
-	TypeString                      // string
-	TypeBool                        // bool
-	TypeInt                         // int
-	TypeInt8                        // int8
-	TypeInt16                       // int16
-	TypeInt32                       // int32
-	TypeInt64                       // int64
-	TypeUint                        // uint
-	TypeUint8                       // uint8
-	TypeUint16                      // uint16
-	TypeUint32                      // uint32
-	TypeUint64                      // uint64
-	TypeFloat32                     // float32
-	TypeFloat64                     // float64
-	TypeComplex64                   // complex64
-	TypeComplex128                  // complex128
-	TypeUintptr                     // uintptr
-	TypeBinary                      // bytes
-	TypeDuration                    // duration
-	TypeTime                        // time
-	TypeError                       // error
-)
-
-func (t Type) IsAny() bool {
-	return t&TypeAny > 0
-}
-
-func (t Type) IsArray() bool {
-	return t&TypeArray > 0
-}
-
-func (t Type) IsNil() bool {
-	return t&TypeNil > 0
-}
-
-func (t Type) IsBool() bool {
-	return t&TypeBool > 0
-}
-
-func (t Type) IsString() bool {
-	return t&TypeString > 0
-}
-
-func (t Type) IsInt() bool {
-	return t&TypeInt > 0
-}
-
-func (t Type) IsInt8() bool {
-	return t&TypeInt8 > 0
-}
-
-func (t Type) IsInt16() bool {
-	return t&TypeInt16 > 0
-}
-
-func (t Type) IsInt32() bool {
-	return t&TypeInt32 > 0
-}
-
-func (t Type) IsInt64() bool {
-	return t&TypeInt64 > 0
-}
-
-func (t Type) IsUint() bool {
-	return t&TypeUint > 0
-}
-
-func (t Type) IsUint8() bool {
-	return t&TypeUint8 > 0
-}
-
-func (t Type) IsUint16() bool {
-	return t&TypeUint16 > 0
-}
-
-func (t Type) IsUint32() bool {
-	return t&TypeUint32 > 0
-}
-
-func (t Type) IsUint64() bool {
-	return t&TypeUint64 > 0
-}
-
-func (t Type) IsFloat32() bool {
-	return t&TypeFloat32 > 0
-}
-
-func (t Type) IsFloat64() bool {
-	return t&TypeFloat64 > 0
-}
-
-func (t Type) IsComplex64() bool {
-	return t&TypeComplex64 > 0
-}
-
-func (t Type) IsComplex128() bool {
-	return t&TypeComplex128 > 0
-}
-
-func (t Type) IsUintptr() bool {
-	return t&TypeUintptr > 0
-}
-
-func (t Type) IsBinary() bool {
-	return t&TypeBinary > 0
-}
-
-func (t Type) IsDuration() bool {
-	return t&TypeDuration > 0
-}
-
-func (t Type) IsTime() bool {
-	return t&TypeTime > 0
-}
-
-func (t Type) IsError() bool {
-	return t&TypeError > 0
-}

global.go

@@ -10,8 +10,8 @@ import (
 
 //nolint:gochecknoglobals
 var global = With(New(),
-	WithCaller("caller", 1, false),
+	WithCaller(KeySource, 1, false),
-	WithLevel("level", level.Debug),
+	WithLevel(KeyLevel, level.Debug),
 	WithExit(level.Alert),
 	WithPanic(level.Emergency),
 )

go.mod

@@ -1,6 +1,6 @@
 module gitoa.ru/go-4devs/log
 
-go 1.17
+go 1.20
 
 require (
 	github.com/sirupsen/logrus v1.8.1

handler/logrus/logger.go

@@ -6,6 +6,7 @@ import (
 	"github.com/sirupsen/logrus"
 	"gitoa.ru/go-4devs/log"
 	"gitoa.ru/go-4devs/log/entry"
+	"gitoa.ru/go-4devs/log/field"
 	"gitoa.ru/go-4devs/log/level"
 )
 
@@ -18,9 +19,11 @@ func Standard() log.Logger {
 func New(log *logrus.Logger) log.Logger {
 	return func(ctx context.Context, data *entry.Entry) (int, error) {
 		lrgFields := make(logrus.Fields, data.Fields().Len())
-		for _, field := range data.Fields() {
+		data.Fields().Fields(func(f field.Field) bool {
-			lrgFields[string(field.Key())] = field.AsInterface()
+			lrgFields[f.Key] = f.Value.Any()
-		}
+
+			return true
+		})
 
 		entry := log.WithContext(ctx).WithFields(lrgFields)
 

handler/otel/helpers.go

@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"gitoa.ru/go-4devs/log/entry"
+	"gitoa.ru/go-4devs/log/field"
 	"gitoa.ru/go-4devs/log/level"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/trace"
@@ -48,9 +49,11 @@ func addEvent(ctx context.Context, data *entry.Entry) {
 		attribute.Int(fieldSeverityNumber, int(lvl)),
 	)
 
-	for _, field := range data.Fields() {
+	data.Fields().Fields(func(f field.Field) bool {
-		attrs = append(attrs, attribute.String(string(field.Key()), field.Value().String()))
+		attrs = append(attrs, attribute.String(f.Key, f.Value.String()))
-	}
+
+		return true
+	})
 
 	span.AddEvent(data.Message(), trace.WithAttributes(attrs...))
 }

handler/zap/logger.go

@@ -5,6 +5,7 @@ import (
 
 	"gitoa.ru/go-4devs/log"
 	"gitoa.ru/go-4devs/log/entry"
+	"gitoa.ru/go-4devs/log/field"
 	"gitoa.ru/go-4devs/log/level"
 	"go.uber.org/zap"
 )
@@ -38,10 +39,12 @@ func Development(options ...zap.Option) log.Logger {
 // New create handler by zap logger.
 func New(logger *zap.Logger) log.Logger {
 	return func(ctx context.Context, data *entry.Entry) (int, error) {
-		zf := make([]zap.Field, data.Fields().Len())
+		zf := make([]zap.Field, 0, data.Fields().Len())
-		for i, field := range data.Fields() {
+		data.Fields().Fields(func(f field.Field) bool {
-			zf[i] = zap.Any(string(field.Key()), field.AsInterface())
+			zf = append(zf, zap.Any(f.Key, f.Value.Any()))
-		}
+
+			return true
+		})
 
 		switch data.Level() {
 		case level.Emergency:

internal/buffer/buffer.go

@@ -0,0 +1,42 @@
+package buffer
+
+import "sync"
+
+const bufferSize = 1024
+
+type Buffer []byte
+
+// Having an initial size gives a dramatic speedup.
+//
+//nolint:gochecknoglobals
+var bufPool = sync.Pool{
+	New: func() any {
+		b := make([]byte, 0, bufferSize)
+
+		return (*Buffer)(&b)
+	},
+}
+
+//nolint:forcetypeassert
+func New() *Buffer {
+	return bufPool.Get().(*Buffer)
+}
+
+func (b *Buffer) Free() {
+	// To reduce peak allocation, return only smaller buffers to the pool.
+	const maxBufferSize = 16 << 10
+	if cap(*b) <= maxBufferSize {
+		*b = (*b)[:0]
+		bufPool.Put(b)
+	}
+}
+
+func (b *Buffer) WriteString(s string) (int, error) {
+	*b = append(*b, s...)
+
+	return len(s), nil
+}
+
+func (b *Buffer) String() string {
+	return string(*b)
+}

level/level_test.go

@@ -7,6 +7,8 @@ import (
 )
 
 func TestMarshalJSON(t *testing.T) {
+	t.Parallel()
+
 	levels := map[level.Level]string{
 		level.Emergency: `"emerg"`,
 		level.Alert:     `"alert"`,
@@ -22,8 +24,10 @@ func TestMarshalJSON(t *testing.T) {
 		actual, err := level.MarshalJSON()
 		if err != nil {
 			t.Errorf("%s got err: %s", level, err)
+
 			continue
 		}
+
 		if string(actual) != expect {
 			t.Errorf("%s got: %s expect: %s", level, actual, expect)
 		}
@@ -31,6 +35,8 @@ func TestMarshalJSON(t *testing.T) {
 }
 
 func TestUnmarshalJSON(t *testing.T) {
+	t.Parallel()
+
 	levels := map[level.Level][]string{
 		level.Emergency: {`"emerg"`, `"Emerg"`},
 		level.Alert:     {`"alert"`, `"ALERT"`},
@@ -47,13 +53,13 @@ func TestUnmarshalJSON(t *testing.T) {
 			var level level.Level
 			if err := level.UnmarshalJSON([]byte(actual)); err != nil {
 				t.Errorf("%s got err: %s", level, err)
+
 				continue
 			}
 
 			if !level.Is(expect) {
 				t.Errorf("%s got: %s expect: %s", actual, level, expect)
 			}
-
 		}
 	}
 }

logger.go

@@ -2,7 +2,6 @@ package log
 
 import (
 	"context"
-	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -14,10 +13,7 @@ import (
 
 var _ io.Writer = (Logger)(nil)
 
-var (
+const badKey = "!BADKEY"
-	ErrIgnoredKey    = errors.New("ignored key without a value")
-	ErrNonStringKeys = errors.New("ignored key-value pairs with non-string keys")
-)
 
 func writeOutput(_ int, err error) {
 	if err != nil {
@@ -52,7 +48,7 @@ func (l Logger) writef(ctx context.Context, level level.Level, format string, ar
 	return l(ctx, data.SetLevel(level).SetMessagef(format, args...))
 }
 
-func (l Logger) kv(ctx context.Context, args ...interface{}) field.Fields {
+func (l Logger) kv(_ context.Context, args ...interface{}) field.Fields {
 	kvEntry := entry.Get()
 
 	defer func() {
@@ -67,21 +63,20 @@ func (l Logger) kv(ctx context.Context, args ...interface{}) field.Fields {
 		}
 
 		if i == len(args)-1 {
-			writeOutput(l.write(ctx, level.Critical, fmt.Sprint("Ignored key without a value.", args[i]), kvEntry.Fields()...))
+			kvEntry = kvEntry.AddAny(badKey, args[i])
 
 			break
 		}
 
-		i++
+		key, val := args[i], args[i+1]
-
-		key, val := args[i-1], args[i]
 		if keyStr, ok := key.(string); ok {
 			kvEntry = kvEntry.AddAny(keyStr, val)
+			i++
 
 			continue
 		}
 
-		writeOutput(l.write(ctx, level.Critical, fmt.Sprint("Ignored key-value pairs with non-string keys.", key, val), kvEntry.Fields()...))
+		kvEntry = kvEntry.AddAny(badKey, args[i])
 	}
 
 	return kvEntry.Fields()

logger_example_test.go

@@ -2,9 +2,12 @@ package log_test
 
 import (
 	"context"
+	"errors"
 	"fmt"
+	"math"
 	"os"
 	"sync/atomic"
+	"time"
 
 	"gitoa.ru/go-4devs/log"
 	"gitoa.ru/go-4devs/log/entry"
@@ -12,12 +15,11 @@ import (
 	"gitoa.ru/go-4devs/log/level"
 )
 
-//nolint:gochecknoglobals
 var ctx = context.Background()
 
 func setStdout() {
 	// set stout for example by default stderror
-	log.SetLogger(log.New(log.WithStdout()).With(log.WithLevel("level", level.Debug)))
+	log.SetLogger(log.New(log.WithStdout()).With(log.WithLevel(log.KeyLevel, level.Debug)))
 }
 
 func ExampleNew() {
@@ -35,7 +37,7 @@ func ExampleInfo() {
 func ExampleErrKV() {
 	setStdout()
 	log.ErrKVs(ctx, "same message", "key", "addition value")
-	// Output: msg="same message" key=addition value level=error
+	// Output: msg="same message" key="addition value" level=error
 }
 
 func ExampleNew_errf() {
@@ -47,7 +49,7 @@ func ExampleNew_errf() {
 func ExampleNew_debugKV() {
 	logger := log.New(log.WithStdout()).With(log.WithLevel("level", level.Debug))
 	logger.DebugKVs(ctx, "same message", "error", os.ErrNotExist)
-	// Output: msg="same message" error=file does not exist level=debug
+	// Output: msg="same message" error="file does not exist" level=debug
 }
 
 func ExampleNew_level() {
@@ -62,28 +64,171 @@ func ExampleNew_level_info() {
 	// Output:
 }
 
+type Obj struct {
+	Name     string
+	IsEnable bool
+}
+
+var (
+	obj = Obj{
+		Name: "test obj",
+	}
+
+	str      = "test str"
+	boolsVal = true
+	intVal   = int(math.MaxInt)
+	int8Val  = int8(math.MaxInt8)
+	int16Val = int16(math.MaxInt16)
+	int32Val = int32(math.MaxInt32)
+	int64Val = int64(math.MaxInt64)
+
+	uintVal   = uint(math.MaxUint)
+	uint8Val  = uint8(math.MaxUint8)
+	uint16Val = uint16(math.MaxInt16)
+	uint32Val = uint32(math.MaxInt32)
+	uint64Val = uint64(math.MaxInt64)
+
+	float32Val = float32(math.MaxFloat32)
+	float64Val = float64(math.MaxFloat64)
+
+	minute  = time.Minute
+	timeVal = time.Unix(0, math.MaxInt32)
+)
+
+func ExampleNew_anyField() {
+	logger := log.New(log.WithStdout(), log.WithJSONFormat())
+	logger.InfoKV(ctx, "any info message",
+		field.Any("obj", Obj{Name: "obj name"}),
+		field.Any("obj", &obj),
+		field.Any("int", intVal),
+		field.Any("uint", uintVal),
+		field.Any("float", float64Val),
+		field.Any("time", timeVal),
+		field.Any("duration", time.Hour),
+		field.Any("error", errors.New("error")),
+	)
+	// Output:
+	// {"msg":"any info message","obj":{"Name":"obj name","IsEnable":false},"obj":{"Name":"test obj","IsEnable":false},"int":9223372036854775807,"uint":18446744073709551615,"float":1.7976931348623157e+308,"time":"1970-01-01T03:00:02+03:00","duration":"1h0m0s","error":"error"}
+}
+
+func ExampleNew_arrayField() {
+	logger := log.New(log.WithStdout(), log.WithJSONFormat())
+	logger.InfoKV(ctx, "array info message",
+		field.Strings("strings", "string", str),
+		field.Bools("bools", true, false),
+		field.Ints("ints", 42, 24),
+		field.Int8s("int8s", 42, 24),
+		field.Int16s("int16s", 42, 24),
+		field.Int32s("int32s", 42, 24),
+		field.Int64s("int64s", 42, 24),
+		field.Uint8s("uint8s", uint8Val, 0),
+		field.Uint16s("uint16s", 42, 24),
+		field.Uint32s("uint32s", 42, 24),
+		field.Uint64s("uint64s", 42, 24),
+		field.Float32s("float32s", 42, 24),
+		field.Float64s("float64s", 42, 24),
+		field.Complex64s("complex64s", 42, 24),
+		field.Complex128s("complex128s", 42, 24),
+		field.Durations("durations", time.Minute, time.Second),
+		field.Times("times", time.Unix(0, 42), time.Unix(0, 24)),
+		field.Errors("errors", errors.New("error"), errors.New("error2")),
+	)
+	// Output:
+	// {"msg":"array info message","strings":["string","test str"],"bools":[true,false],"ints":[42,24],"int8s":[42,24],"int16s":[42,24],"int32s":[42,24],"int64s":[42,24],"uint8s":[255,0],"uint16s":[42,24],"uint32s":[42,24],"uint64s":[42,24],"float32s":[42,24],"float64s":[42,24],"complex64s":["(42+0i)","(24+0i)"],"complex128s":["(42+0i)","(24+0i)"],"durations":["1m0s","1s"],"times":["1970-01-01T03:00:00+03:00","1970-01-01T03:00:00+03:00"],"errors":["error","error2"]}
+}
+
+func ExampleNew_pointerField() {
+	logger := log.New(log.WithStdout(), log.WithJSONFormat())
+	logger.InfoKV(ctx, "pointer info message",
+		field.Stringp("stringp", &str),
+		field.Stringp("stringp", nil),
+		field.Boolp("boolp", &boolsVal),
+		field.Boolp("boolp", nil),
+		field.Intp("intp", &intVal),
+		field.Intp("intp", nil),
+		field.Int8p("int8p", &int8Val),
+		field.Int8p("int8p", nil),
+		field.Int16p("int16p", &int16Val),
+		field.Int16p("int16p", nil),
+		field.Int32p("int32p", &int32Val),
+		field.Int32p("int32p", nil),
+		field.Int64p("int64p", &int64Val),
+		field.Int64p("int64p", nil),
+		field.Uintp("uintp", &uintVal),
+		field.Uintp("uintp", nil),
+		field.Uint8p("uint8p", &uint8Val),
+		field.Uint8p("uint8p", nil),
+		field.Uint16p("uint16p", &uint16Val),
+		field.Uint16p("uint16p", nil),
+		field.Uint32p("uint32p", &uint32Val),
+		field.Uint32p("uint32p", nil),
+		field.Uint64p("uint64p", &uint64Val),
+		field.Uint64p("uint64p", nil),
+		field.Float32p("float32p", &float32Val),
+		field.Float32p("float32p", nil),
+		field.Float64p("float64p", &float64Val),
+		field.Float64p("float64p", nil),
+		field.Durationp("durationp", &minute),
+		field.Durationp("durationp", nil),
+		field.Timep("timep", &timeVal),
+		field.Timep("timep", nil),
+	)
+	// Output:
+	// {"msg":"pointer info message","stringp":"test str","stringp":null,"boolp":true,"boolp":null,"intp":9223372036854775807,"intp":null,"int8p":127,"int8p":null,"int16p":32767,"int16p":null,"int32p":2147483647,"int32p":null,"int64p":9223372036854775807,"int64p":null,"uintp":18446744073709551615,"uintp":null,"uint8p":255,"uint8p":null,"uint16p":32767,"uint16p":null,"uint32p":2147483647,"uint32p":null,"uint64p":9223372036854775807,"uint64p":null,"float32p":3.4028235e+38,"float32p":null,"float64p":1.7976931348623157e+308,"float64p":null,"durationp":"1m0s","durationp":null,"timep":"1970-01-01T03:00:02+03:00","timep":null}
+}
+
+func ExampleNew_fields() {
+	logger := log.New(log.WithStdout(), log.WithJSONFormat())
+	logger.InfoKV(ctx, "info message",
+		field.String("string", str),
+		field.Bool("bool", true),
+		field.Int("int", 42),
+		field.Int8("int8", 42),
+		field.Int16("int16", 42),
+		field.Int32("int32", 42),
+		field.Int64("int64", 42),
+		field.Uint8("uint8", uint8Val),
+		field.Uint16("uint16", 42),
+		field.Uint32("uint32", 42),
+		field.Uint64("uint64", 42),
+		field.Float32("float32", 42),
+		field.Float64("float64", 42),
+		field.Complex64("complex16", 42),
+		field.Complex128("complex128", 42),
+		field.Duration("duration", time.Minute),
+		field.Time("time", time.Unix(0, 42)),
+		field.FormatTime("format_time", time.UnixDate, timeVal),
+		field.Error("error", errors.New("error")),
+	)
+	// Output:
+	// {"msg":"info message","string":"test str","bool":true,"int":42,"int8":42,"int16":42,"int32":42,"int64":42,"uint8":255,"uint16":42,"uint32":42,"uint64":42,"float32":42,"float64":42,"complex16":"(42+0i)","complex128":"(42+0i)","duration":"1m0s","time":"1970-01-01T03:00:00+03:00","format_time":"Thu Jan  1 03:00:02 MSK 1970","error":"error"}
+}
+
 func ExampleNew_jsonFormat() {
 	logger := log.New(log.WithStdout(), log.WithJSONFormat()).
 		With(
-			log.WithLevel("level", level.Debug),
+			log.WithLevel(log.KeyLevel, level.Debug),
 			log.GoVersion("go-version"),
 		)
 	logger.Err(ctx, "same error message")
-	// Output: {"go-version":"go1.18.1","level":"error","msg":"same error message"}
+	logger.WarnKVs(ctx, "same warn message", "obj", Obj{Name: "obj name"})
+	// Output:
+	// {"msg":"same error message","level":"error","go-version":"go1.21.5"}
+	// {"msg":"same warn message","obj":{"Name":"obj name","IsEnable":false},"level":"warning","go-version":"go1.21.5"}
 }
 
 func ExampleNew_textEncoding() {
 	logger := log.With(
 		log.New(log.WithStdout()),
-		log.WithLevel("level", level.Debug),
+		log.WithLevel(log.KeyLevel, level.Debug),
 		log.GoVersion("go-version"),
 	)
 	logger.Err(ctx, "same error message")
-	logger.InfoKVs(ctx, "same info message", "api-version", 0.1)
+	logger.InfoKVs(ctx, "same info message", "api-version", 0.1, "obj", Obj{Name: "text value", IsEnable: true})
 
 	// Output:
-	// msg="same error message" level=error go-version=go1.18.1
+	// msg="same error message" level=error go-version=go1.21.5
-	// msg="same info message" api-version=0.1 level=info go-version=go1.18.1
+	// msg="same info message" api-version=0.1 obj={Name:text value IsEnable:true} level=info go-version=go1.21.5
 }
 
 type ctxKey string
@@ -105,7 +250,7 @@ func ExampleWith() {
 		levelInfo, log.WithContextValue(requestID), log.KeyValue("api", "0.1.0"), log.GoVersion("go"),
 	)
 	logger.Info(vctx, "same message")
-	// Output: msg="same message" level=info requestID=6a5fa048-7181-11ea-bc55-0242ac130003 api=0.1.0 go=go1.18.1
+	// Output: msg="same message" level=info requestID=6a5fa048-7181-11ea-bc55-0242ac130003 api=0.1.0 go=go1.21.5
 }
 
 func ExampleLogger_Print() {
@@ -114,7 +259,7 @@ func ExampleLogger_Print() {
 		levelInfo, log.KeyValue("client", "http"), log.KeyValue("api", "0.1.0"), log.GoVersion("go"),
 	)
 	logger.Print("same message")
-	// Output: msg="same message" level=info client=http api=0.1.0 go=go1.18.1
+	// Output: msg="same message" level=info client=http api=0.1.0 go=go1.21.5
 }
 
 func ExamplePrint() {
@@ -123,22 +268,43 @@ func ExamplePrint() {
 	// Output: msg="same message" level=info
 }
 
-func ExampleWithClosure() {
+func Example_fieldClosureFn() {
 	cnt := int32(0)
-	closure := func() string {
+	closure := field.ClosureFn(func() any {
 		d := fmt.Sprintf("additional error data: %d", cnt)
 		atomic.AddInt32(&cnt, 1)
 
 		return d
-	}
+	})
 
-	log := log.With(log.New(log.WithStdout()), log.WithLevel("level", level.Info), log.WithClosure)
+	log := log.With(log.New(log.WithStdout()), log.WithLevel("level", level.Info))
 
 	log.DebugKVs(ctx, "debug message", "data", closure)
 	log.ErrKVs(ctx, "error message", "err", closure)
 	log.WarnKVs(ctx, "warn message", "warn", closure)
 
 	// Output:
-	// msg="error message" err=additional error data: 0 level=error
+	// msg="error message" err="additional error data: 0" level=error
-	// msg="warn message" warn=additional error data: 1 level=warning
+	// msg="warn message" warn="additional error data: 1" level=warning
+}
+
+func Example_withGroup() {
+	log := log.With(log.New(log.WithStdout()), log.WithLevel(log.KeyLevel, level.Info))
+
+	log.ErrKVs(ctx, "error message",
+		field.Groups("grous_field",
+			field.Error("err", os.ErrDeadlineExceeded),
+			field.Bool("bool", false),
+		),
+	)
+	log.WarnKV(ctx, "error message", field.ValuerFn("valuer_field", func() any {
+		return field.Fields{
+			field.Int("int_value", math.MaxInt),
+			field.Uint8("uint8_value", math.MaxUint8),
+		}
+	}))
+
+	// Output:
+	// msg="error message" grous_field.err="i/o timeout" grous_field.bool=false level=error
+	// msg="error message" valuer_field.int_value=9223372036854775807 valuer_field.uint8_value=255 level=warning
 }

logger_example_trace_test.go

@@ -44,7 +44,7 @@ func (e exporter) Shutdown(_ context.Context) error {
 	return nil
 }
 
-func (e exporter) ExportSpans(ctx context.Context, spanData []sdktrace.ReadOnlySpan) error {
+func (e exporter) ExportSpans(_ context.Context, spanData []sdktrace.ReadOnlySpan) error {
 	for _, data := range spanData {
 		for _, events := range data.Events() {
 			fmt.Print("event: ", events.Name)

logger_test.go

@@ -13,7 +13,6 @@ import (
 	"gitoa.ru/go-4devs/log/level"
 )
 
-//nolint:gochecknoglobals
 var requestID ctxKey = "requestID"
 
 func TestFields(t *testing.T) {
@@ -28,14 +27,14 @@ func TestFields(t *testing.T) {
 	ctx := context.Background()
 	buf := &bytes.Buffer{}
 	log := log.New(log.WithWriter(buf)).
-		With(log.WithLevel("level", level.Info), log.WithClosure)
+		With(log.WithLevel("level", level.Info))
-	success := "msg=\"message\" err=file already exists version=0.1.0 obj={id:uid} closure=some closure data level=info\n"
+	success := "msg=message err=\"file already exists\" version=0.1.0 obj={id:uid} closure=\"some closure data\" level=info\n"
 
 	log.InfoKVs(ctx, "message",
 		"err", os.ErrExist,
 		"version", "0.1.0",
 		"obj", rObj{id: "uid"},
-		"closure", func() string {
+		"closure", func() any {
 			atomic.AddInt32(&cnt, 1)
 
 			return "some closure data"
@@ -43,11 +42,11 @@ func TestFields(t *testing.T) {
 	)
 
 	log.DebugKVs(ctx, "debug message",
-		"closure", func() string {
+		"closure", field.ClosureFn(func() any {
 			atomic.AddInt32(&cnt, 1)
 
 			return "some debug data"
-		},
+		}),
 	)
 
 	if success != buf.String() {
@@ -64,7 +63,7 @@ func TestWriter(t *testing.T) {
 
 	ctx := context.Background()
 
-	success := "msg=\"info message\" err=file already exists requestID=6a5fa048-7181-11ea-bc55-0242ac1311113 level=info\n"
+	success := "msg=\"info message\" err=\"file already exists\" requestID=6a5fa048-7181-11ea-bc55-0242ac1311113 level=info\n"
 	buf := &bytes.Buffer{}
 	logger := log.New(log.WithWriter(buf)).With(log.WithContextValue(requestID), log.WithLevel("level", level.Info))
 

middleware.go

@@ -12,8 +12,6 @@ import (
 	"gitoa.ru/go-4devs/log/level"
 )
 
-var _ Middleware = WithClosure
-
 // Middleware handle.
 type Middleware func(ctx context.Context, e *entry.Entry, handler Logger) (int, error)
 
@@ -62,18 +60,6 @@ func WithLevel(key string, lvl level.Level) Middleware {
 	}
 }
 
-func WithClosure(ctx context.Context, data *entry.Entry, handler Logger) (int, error) {
-	for i, field := range data.Fields() {
-		if field.Type().IsAny() {
-			if f, ok := field.AsInterface().(func() string); ok {
-				data.Fields().Set(i, field.Key().String(f()))
-			}
-		}
-	}
-
-	return handler(ctx, data)
-}
-
 // KeyValue add field by const key value.
 func KeyValue(key string, value interface{}) Middleware {
 	return func(ctx context.Context, e *entry.Entry, handler Logger) (int, error) {
@@ -111,7 +97,7 @@ func WithCaller(key string, depth int, full bool) Middleware {
 // WithTime adds time.
 func WithTime(key, format string) Middleware {
 	return func(ctx context.Context, e *entry.Entry, handler Logger) (int, error) {
-		return handler(ctx, e.Add(field.Time(key, time.Now())))
+		return handler(ctx, e.Add(field.FormatTime(key, format, time.Now())))
 	}
 }
 

writter.go

@@ -1,119 +1,129 @@
 package log
 
 import (
-	"bytes"
 	"context"
-	"encoding/json"
 	"fmt"
 	"io"
 	"os"
-	"strings"
-	"sync"
 
 	"gitoa.ru/go-4devs/log/entry"
+	"gitoa.ru/go-4devs/log/field"
+	"gitoa.ru/go-4devs/log/internal/buffer"
 )
 
-// New creates standart logger.
+// Keys for "built-in" attributes.
-func New(opts ...Option) Logger {
+const (
-	logger := log{e: stringFormat(), w: os.Stderr}
+	// TimeKey is the key used by the built-in handlers for the time
+	// when the log method is called. The associated Value is a [time.Time].
+	KeyTime = "time"
+	// LevelKey is the key used by the built-in handlers for the level
+	// of the log call. The associated value is a [Level].
+	KeyLevel = "level"
+	// MessageKey is the key used by the built-in handlers for the
+	// message of the log call. The associated value is a string.
+	KeyMessage = "msg"
+	// SourceKey is the key used by the built-in handlers for the source file
+	// and line of the log call. The associated value is a string.
+	KeySource = "source"
+)
 
-	for _, opt := range opts {
+func WithWriter(w io.Writer) func(*option) {
-		opt(&logger)
+	return func(o *option) {
+		o.out = w
 	}
+}
 
-	return func(_ context.Context, entry *entry.Entry) (int, error) {
+func WithStdout() func(*option) {
-		b, err := logger.e(entry)
+	return func(o *option) {
-		if err != nil {
+		o.out = os.Stdout
-			return 0, fmt.Errorf("enode err: %w", err)
 	}
+}
 
-		n, err := logger.w.Write(b)
+// WithStringFormat sets format as simple string.
-		if err != nil {
+func WithStringFormat() func(*option) {
-			return 0, fmt.Errorf("failed write: %w", err)
+	return func(o *option) {
+		o.format = formatText()
 	}
+}
 
-		return n, nil
+// WithJSONFormat sets json output format.
+func WithJSONFormat() func(*option) {
+	return func(o *option) {
+		o.format = formatJSON()
 	}
 }
 
-// Option configure log.
+type option struct {
-type Option func(*log)
+	format func(io.Writer, *entry.Entry) (int, error)
+	out    io.Writer
+}
 
-// Encode sets formats and encode output message.
+// New creates standart logger.
-type Encode func(*entry.Entry) ([]byte, error)
+func New(opts ...func(*option)) Logger {
+	log := option{
+		format: formatText(),
+		out:    os.Stderr,
+	}
 
-type log struct {
+	for _, opt := range opts {
-	w io.Writer
+		opt(&log)
-	e Encode
+	}
-}
 
-// WithWriter sets writer logger.
+	return func(_ context.Context, entry *entry.Entry) (int, error) {
-func WithWriter(writer io.Writer) Option {
+		return log.format(log.out, entry)
-	return func(l *log) {
-		l.w = writer
 	}
 }
 
-// WithStdout sets logged to os.Stdout.
+func formatText() func(io.Writer, *entry.Entry) (int, error) {
-func WithStdout() Option {
+	enc := field.NewEncoderText()
-	return WithWriter(os.Stdout)
-}
 
-// WithEncode sets format log.
+	return func(w io.Writer, entry *entry.Entry) (int, error) {
-func WithEncode(e Encode) Option {
+		buf := buffer.New()
-	return func(l *log) {
+		defer func() {
-		l.e = e
+			buf.Free()
+		}()
+
+		*buf = enc.AppendField(*buf, field.String(KeyMessage, entry.Message()))
+
+		for _, field := range entry.Fields() {
+			*buf = enc.AppendField(*buf, field)
 		}
-}
 
-// WithStringFormat sets format as simple string.
+		_, _ = buf.WriteString("\n")
-func WithStringFormat() Option {
-	return WithEncode(stringFormat())
-}
 
-// WithJSONFormat sets json output format.
+		n, err := w.Write(*buf)
-func WithJSONFormat() Option {
+		if err != nil {
-	return WithEncode(jsonFormat)
+			return 0, fmt.Errorf("format text:%w", err)
-}
+		}
 
-//nolint:forcetypeassert
+		return n, nil
-func stringFormat() func(entry *entry.Entry) ([]byte, error) {
-	pool := sync.Pool{
-		New: func() interface{} {
-			return &bytes.Buffer{}
-		},
 	}
+}
 
-	return func(entry *entry.Entry) ([]byte, error) {
+func formatJSON() func(w io.Writer, entry *entry.Entry) (int, error) {
-		buf := pool.Get().(*bytes.Buffer)
+	enc := field.NewEncoderJSON()
-		buf.Reset()
 
+	return func(w io.Writer, entry *entry.Entry) (int, error) {
+		buf := buffer.New()
 		defer func() {
-			pool.Put(buf)
+			buf.Free()
 		}()
 
-		buf.WriteString("msg=\"")
+		_, _ = buf.WriteString("{")
-		buf.WriteString(strings.TrimSpace(entry.Message()))
+		*buf = enc.AppendField(*buf, field.String(KeyMessage, entry.Message()))
-		buf.WriteString("\"")
 
 		for _, field := range entry.Fields() {
-			buf.WriteString(" ")
+			*buf = enc.AppendField(*buf, field)
-			buf.WriteString(string(field.Key()))
-			buf.WriteString("=")
-			buf.WriteString(field.Value().String())
 		}
 
-		buf.WriteString("\n")
+		_, _ = buf.WriteString("}")
+		_, _ = buf.WriteString("\n")
 
-		return buf.Bytes(), nil
+		n, err := w.Write(*buf)
-	}
-}
-
-func jsonFormat(entry *entry.Entry) ([]byte, error) {
-	res, err := json.Marshal(entry.AddString("msg", entry.Message()).Fields().AsMap())
 		if err != nil {
-		return nil, fmt.Errorf("marshal err: %w", err)
+			return 0, fmt.Errorf("format json:%w", err)
 		}
 
-	return append(res, []byte("\n")...), nil
+		return n, nil
+	}
 }