Fix error by linter

.golangci.yml

@@ -62,6 +62,10 @@ issues:
     - path: rtype.go
       linters:
         - golint
+        - stylecheck
+    - path: error.go
+      linters:
+        - staticcheck
 
   # Maximum issues count per one linter. Set to 0 to disable. Default is 50.
   max-issues-per-linter: 0

decode_compile.go

@@ -7,6 +7,8 @@ import (
 	"strings"
 	"unicode"
 	"unsafe"
+
+	"github.com/goccy/go-json/internal/runtime"
 )
 
 var (
@@ -327,16 +329,16 @@ func decodeCompileStruct(typ *rtype, structName, fieldName string, structTypeToD
 	structName = typ.Name()
 	for i := 0; i < fieldNum; i++ {
 		field := typ.Field(i)
-		if isIgnoredStructField(field) {
+		if runtime.IsIgnoredStructField(field) {
 			continue
 		}
 		isUnexportedField := unicode.IsLower([]rune(field.Name)[0])
-		tag := structTagFromField(field)
+		tag := runtime.StructTagFromField(field)
 		dec, err := decodeCompile(type2rtype(field.Type), structName, field.Name, structTypeToDecoder)
 		if err != nil {
 			return nil, err
 		}
-		if field.Anonymous && !tag.isTaggedKey {
+		if field.Anonymous && !tag.IsTaggedKey {
 			if stDec, ok := dec.(*structDecoder); ok {
 				if type2rtype(field.Type) == typ {
 					// recursive definition
@@ -414,19 +416,19 @@ func decodeCompileStruct(typ *rtype, structName, fieldName string, structTypeToD
 				}
 			}
 		} else {
-			if tag.isString {
+			if tag.IsString {
 				dec = newWrappedStringDecoder(type2rtype(field.Type), dec, structName, field.Name)
 			}
 			var key string
-			if tag.key != "" {
-				key = tag.key
+			if tag.Key != "" {
+				key = tag.Key
 			} else {
 				key = field.Name
 			}
 			fieldSet := &structFieldSet{
 				dec:         dec,
 				offset:      field.Offset,
-				isTaggedKey: tag.isTaggedKey,
+				isTaggedKey: tag.IsTaggedKey,
 				key:         key,
 				keyLen:      int64(len(key)),
 			}

indent.go

@@ -1,108 +0,0 @@
-package json
-
-import "bytes"
-
-func encodeWithIndent(dst *bytes.Buffer, src []byte, prefix, indentStr string) error {
-	length := int64(len(src))
-	indentNum := 0
-	indentBytes := []byte(indentStr)
-	for cursor := int64(0); cursor < length; cursor++ {
-		c := src[cursor]
-		switch c {
-		case ' ', '\t', '\n', '\r':
-			continue
-		case '"':
-			if err := dst.WriteByte(c); err != nil {
-				return err
-			}
-			for {
-				cursor++
-				if err := dst.WriteByte(src[cursor]); err != nil {
-					return err
-				}
-				switch src[cursor] {
-				case '\\':
-					cursor++
-					if err := dst.WriteByte(src[cursor]); err != nil {
-						return err
-					}
-				case '"':
-					goto LOOP_END
-				case nul:
-					return errUnexpectedEndOfJSON("string", length)
-				}
-			}
-		case '{':
-			if cursor+1 < length && src[cursor+1] == '}' {
-				if _, err := dst.Write([]byte{'{', '}'}); err != nil {
-					return err
-				}
-				cursor++
-			} else {
-				indentNum++
-				b := []byte{c, '\n'}
-				b = append(b, prefix...)
-				b = append(b, bytes.Repeat(indentBytes, indentNum)...)
-				if _, err := dst.Write(b); err != nil {
-					return err
-				}
-			}
-		case '}':
-			indentNum--
-			if indentNum < 0 {
-				return errInvalidCharacter('}', "}", cursor)
-			}
-			b := []byte{'\n'}
-			b = append(b, prefix...)
-			b = append(b, bytes.Repeat(indentBytes, indentNum)...)
-			b = append(b, c)
-			if _, err := dst.Write(b); err != nil {
-				return err
-			}
-		case '[':
-			if cursor+1 < length && src[cursor+1] == ']' {
-				if _, err := dst.Write([]byte{'[', ']'}); err != nil {
-					return err
-				}
-				cursor++
-			} else {
-				indentNum++
-				b := []byte{c, '\n'}
-				b = append(b, prefix...)
-				b = append(b, bytes.Repeat(indentBytes, indentNum)...)
-				if _, err := dst.Write(b); err != nil {
-					return err
-				}
-			}
-		case ']':
-			indentNum--
-			if indentNum < 0 {
-				return errInvalidCharacter(']', "]", cursor)
-			}
-			b := []byte{'\n'}
-			b = append(b, prefix...)
-			b = append(b, bytes.Repeat(indentBytes, indentNum)...)
-			b = append(b, c)
-			if _, err := dst.Write(b); err != nil {
-				return err
-			}
-		case ':':
-			if _, err := dst.Write([]byte{':', ' '}); err != nil {
-				return err
-			}
-		case ',':
-			b := []byte{',', '\n'}
-			b = append(b, prefix...)
-			b = append(b, bytes.Repeat(indentBytes, indentNum)...)
-			if _, err := dst.Write(b); err != nil {
-				return err
-			}
-		default:
-			if err := dst.WriteByte(c); err != nil {
-				return err
-			}
-		}
-	LOOP_END:
-	}
-	return nil
-}

internal/encoder/vm/vm.go

@@ -51,7 +51,6 @@ var (
 	appendStructEnd     = encoder.AppendStructEnd
 	errUnsupportedValue = encoder.ErrUnsupportedValue
 	errUnsupportedFloat = encoder.ErrUnsupportedFloat
-	errMarshalerWithCode = encoder.ErrMarshalerWithCode
 	mapiterinit         = encoder.MapIterInit
 	mapiterkey          = encoder.MapIterKey
 	mapitervalue        = encoder.MapIterValue

internal/encoder/vm_escaped/vm.go

@@ -51,7 +51,6 @@ var (
 	appendStructEnd     = encoder.AppendStructEnd
 	errUnsupportedValue = encoder.ErrUnsupportedValue
 	errUnsupportedFloat = encoder.ErrUnsupportedFloat
-	errMarshalerWithCode = encoder.ErrMarshalerWithCode
 	mapiterinit         = encoder.MapIterInit
 	mapiterkey          = encoder.MapIterKey
 	mapitervalue        = encoder.MapIterValue

internal/encoder/vm_escaped_indent/vm.go

@@ -47,7 +47,6 @@ var (
 	appendStructEnd     = encoder.AppendStructEndIndent
 	errUnsupportedValue = encoder.ErrUnsupportedValue
 	errUnsupportedFloat = encoder.ErrUnsupportedFloat
-	errMarshalerWithCode = encoder.ErrMarshalerWithCode
 	mapiterinit         = encoder.MapIterInit
 	mapiterkey          = encoder.MapIterKey
 	mapitervalue        = encoder.MapIterValue

internal/encoder/vm_indent/vm.go

@@ -53,7 +53,6 @@ var (
 	appendStructEnd     = encoder.AppendStructEndIndent
 	errUnsupportedValue = encoder.ErrUnsupportedValue
 	errUnsupportedFloat = encoder.ErrUnsupportedFloat
-	errMarshalerWithCode = encoder.ErrMarshalerWithCode
 	mapiterinit         = encoder.MapIterInit
 	mapiterkey          = encoder.MapIterKey
 	mapitervalue        = encoder.MapIterValue

internal/runtime/rtype.go

@@ -252,8 +252,9 @@ func IfaceIndir(*Type) bool
 //go:noescape
 func RType2Type(t *Type) reflect.Type
 
+//go:nolint structcheck
 type emptyInterface struct {
-	typ *Type
+	_   *Type
 	ptr unsafe.Pointer
 }
 

rtype.go

@@ -18,10 +18,6 @@ func rtype_ptrTo(t *rtype) *rtype {
 	return runtime.PtrTo(t)
 }
 
-func ifaceIndir(t *rtype) bool {
-	return runtime.IfaceIndir(t)
-}
-
 func rtype2type(t *rtype) reflect.Type {
 	return runtime.RType2Type(t)
 }

struct_field.go

@@ -1,81 +0,0 @@
-package json
-
-import (
-	"reflect"
-	"strings"
-	"unicode"
-)
-
-func getTag(field reflect.StructField) string {
-	return field.Tag.Get("json")
-}
-
-func isIgnoredStructField(field reflect.StructField) bool {
-	if field.PkgPath != "" {
-		if field.Anonymous {
-			if !(field.Type.Kind() == reflect.Ptr && field.Type.Elem().Kind() == reflect.Struct) && field.Type.Kind() != reflect.Struct {
-				return true
-			}
-		} else {
-			// private field
-			return true
-		}
-	}
-	tag := getTag(field)
-	return tag == "-"
-}
-
-type structTag struct {
-	key         string
-	isTaggedKey bool
-	isOmitEmpty bool
-	isString    bool
-	field       reflect.StructField
-}
-
-type structTags []*structTag
-
-func (t structTags) existsKey(key string) bool {
-	for _, tt := range t {
-		if tt.key == key {
-			return true
-		}
-	}
-	return false
-}
-
-func isValidTag(s string) bool {
-	if s == "" {
-		return false
-	}
-	for _, c := range s {
-		switch {
-		case strings.ContainsRune("!#$%&()*+-./:<=>?@[]^_{|}~ ", c):
-			// Backslash and quote chars are reserved, but
-			// otherwise any punctuation chars are allowed
-			// in a tag name.
-		case !unicode.IsLetter(c) && !unicode.IsDigit(c):
-			return false
-		}
-	}
-	return true
-}
-
-func structTagFromField(field reflect.StructField) *structTag {
-	keyName := field.Name
-	tag := getTag(field)
-	st := &structTag{field: field}
-	opts := strings.Split(tag, ",")
-	if len(opts) > 0 {
-		if opts[0] != "" && isValidTag(opts[0]) {
-			keyName = opts[0]
-			st.isTaggedKey = true
-		}
-	}
-	st.key = keyName
-	if len(opts) > 1 {
-		st.isOmitEmpty = opts[1] == "omitempty"
-		st.isString = opts[1] == "string"
-	}
-	return st
-}