Bump github.com/gookit/config/v2 from 2.1.8 to 2.2.2

Bumps [github.com/gookit/config/v2](https://github.com/gookit/config) from 2.1.8 to 2.2.2.
- [Release notes](https://github.com/gookit/config/releases)
- [Commits](https://github.com/gookit/config/compare/v2.1.8...v2.2.2)

---
updated-dependencies:
- dependency-name: github.com/gookit/config/v2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/goccy/go-yaml/parser/parser.go

@@ -0,0 +1,714 @@
+package parser
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strings"
+
+	"github.com/goccy/go-yaml/ast"
+	"github.com/goccy/go-yaml/internal/errors"
+	"github.com/goccy/go-yaml/lexer"
+	"github.com/goccy/go-yaml/token"
+	"golang.org/x/xerrors"
+)
+
+type parser struct{}
+
+func (p *parser) parseMapping(ctx *context) (*ast.MappingNode, error) {
+	mapTk := ctx.currentToken()
+	node := ast.Mapping(mapTk, true)
+	node.SetPath(ctx.path)
+	ctx.progress(1) // skip MappingStart token
+	for ctx.next() {
+		tk := ctx.currentToken()
+		if tk.Type == token.MappingEndType {
+			node.End = tk
+			return node, nil
+		} else if tk.Type == token.CollectEntryType {
+			ctx.progress(1)
+			continue
+		}
+
+		value, err := p.parseMappingValue(ctx)
+		if err != nil {
+			return nil, errors.Wrapf(err, "failed to parse mapping value in mapping node")
+		}
+		mvnode, ok := value.(*ast.MappingValueNode)
+		if !ok {
+			return nil, errors.ErrSyntax("failed to parse flow mapping node", value.GetToken())
+		}
+		node.Values = append(node.Values, mvnode)
+		ctx.progress(1)
+	}
+	return nil, errors.ErrSyntax("unterminated flow mapping", node.GetToken())
+}
+
+func (p *parser) parseSequence(ctx *context) (*ast.SequenceNode, error) {
+	node := ast.Sequence(ctx.currentToken(), true)
+	node.SetPath(ctx.path)
+	ctx.progress(1) // skip SequenceStart token
+	for ctx.next() {
+		tk := ctx.currentToken()
+		if tk.Type == token.SequenceEndType {
+			node.End = tk
+			break
+		} else if tk.Type == token.CollectEntryType {
+			ctx.progress(1)
+			continue
+		}
+
+		value, err := p.parseToken(ctx.withIndex(uint(len(node.Values))), tk)
+		if err != nil {
+			return nil, errors.Wrapf(err, "failed to parse sequence value in flow sequence node")
+		}
+		node.Values = append(node.Values, value)
+		ctx.progress(1)
+	}
+	return node, nil
+}
+
+func (p *parser) parseTag(ctx *context) (*ast.TagNode, error) {
+	tagToken := ctx.currentToken()
+	node := ast.Tag(tagToken)
+	node.SetPath(ctx.path)
+	ctx.progress(1) // skip tag token
+	var (
+		value ast.Node
+		err   error
+	)
+	switch token.ReservedTagKeyword(tagToken.Value) {
+	case token.MappingTag,
+		token.OrderedMapTag:
+		value, err = p.parseMapping(ctx)
+	case token.IntegerTag,
+		token.FloatTag,
+		token.StringTag,
+		token.BinaryTag,
+		token.TimestampTag,
+		token.NullTag:
+		typ := ctx.currentToken().Type
+		if typ == token.LiteralType || typ == token.FoldedType {
+			value, err = p.parseLiteral(ctx)
+		} else {
+			value = p.parseScalarValue(ctx.currentToken())
+		}
+	case token.SequenceTag,
+		token.SetTag:
+		err = errors.ErrSyntax(fmt.Sprintf("sorry, currently not supported %s tag", tagToken.Value), tagToken)
+	default:
+		// custom tag
+		value, err = p.parseToken(ctx, ctx.currentToken())
+	}
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parse tag value")
+	}
+	node.Value = value
+	return node, nil
+}
+
+func (p *parser) removeLeftSideNewLineCharacter(src string) string {
+	// CR or LF or CRLF
+	return strings.TrimLeft(strings.TrimLeft(strings.TrimLeft(src, "\r"), "\n"), "\r\n")
+}
+
+func (p *parser) existsNewLineCharacter(src string) bool {
+	if strings.Index(src, "\n") > 0 {
+		return true
+	}
+	if strings.Index(src, "\r") > 0 {
+		return true
+	}
+	return false
+}
+
+func (p *parser) validateMapKey(tk *token.Token) error {
+	if tk.Type != token.StringType {
+		return nil
+	}
+	origin := p.removeLeftSideNewLineCharacter(tk.Origin)
+	if p.existsNewLineCharacter(origin) {
+		return errors.ErrSyntax("unexpected key name", tk)
+	}
+	return nil
+}
+
+func (p *parser) createNullToken(base *token.Token) *token.Token {
+	pos := *(base.Position)
+	pos.Column++
+	return token.New("null", "null", &pos)
+}
+
+func (p *parser) parseMapValue(ctx *context, key ast.MapKeyNode, colonToken *token.Token) (ast.Node, error) {
+	node, err := p.createMapValueNode(ctx, key, colonToken)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to create map value node")
+	}
+	if node != nil && node.GetPath() == "" {
+		node.SetPath(ctx.path)
+	}
+	return node, nil
+}
+
+func (p *parser) createMapValueNode(ctx *context, key ast.MapKeyNode, colonToken *token.Token) (ast.Node, error) {
+	tk := ctx.currentToken()
+	if tk == nil {
+		nullToken := p.createNullToken(colonToken)
+		ctx.insertToken(ctx.idx, nullToken)
+		return ast.Null(nullToken), nil
+	}
+
+	if tk.Position.Column == key.GetToken().Position.Column && tk.Type == token.StringType {
+		// in this case,
+		// ----
+		// key: <value does not defined>
+		// next
+		nullToken := p.createNullToken(colonToken)
+		ctx.insertToken(ctx.idx, nullToken)
+		return ast.Null(nullToken), nil
+	}
+
+	if tk.Position.Column < key.GetToken().Position.Column {
+		// in this case,
+		// ----
+		//   key: <value does not defined>
+		// next
+		nullToken := p.createNullToken(colonToken)
+		ctx.insertToken(ctx.idx, nullToken)
+		return ast.Null(nullToken), nil
+	}
+
+	value, err := p.parseToken(ctx, ctx.currentToken())
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parse mapping 'value' node")
+	}
+	return value, nil
+}
+
+func (p *parser) validateMapValue(ctx *context, key, value ast.Node) error {
+	keyColumn := key.GetToken().Position.Column
+	valueColumn := value.GetToken().Position.Column
+	if keyColumn != valueColumn {
+		return nil
+	}
+	if value.Type() != ast.StringType {
+		return nil
+	}
+	ntk := ctx.nextToken()
+	if ntk == nil || (ntk.Type != token.MappingValueType && ntk.Type != token.SequenceEntryType) {
+		return errors.ErrSyntax("could not found expected ':' token", value.GetToken())
+	}
+	return nil
+}
+
+func (p *parser) parseMappingValue(ctx *context) (ast.Node, error) {
+	key, err := p.parseMapKey(ctx)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parse map key")
+	}
+	keyText := key.GetToken().Value
+	key.SetPath(ctx.withChild(keyText).path)
+	if err := p.validateMapKey(key.GetToken()); err != nil {
+		return nil, errors.Wrapf(err, "validate mapping key error")
+	}
+	ctx.progress(1)          // progress to mapping value token
+	tk := ctx.currentToken() // get mapping value token
+	if tk == nil {
+		return nil, errors.ErrSyntax("unexpected map", key.GetToken())
+	}
+	ctx.progress(1) // progress to value token
+	if err := p.setSameLineCommentIfExists(ctx.withChild(keyText), key); err != nil {
+		return nil, errors.Wrapf(err, "failed to set same line comment to node")
+	}
+	if key.GetComment() != nil {
+		// if current token is comment, GetComment() is not nil.
+		// then progress to value token
+		ctx.progressIgnoreComment(1)
+	}
+
+	value, err := p.parseMapValue(ctx.withChild(keyText), key, tk)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parse map value")
+	}
+	if err := p.validateMapValue(ctx, key, value); err != nil {
+		return nil, errors.Wrapf(err, "failed to validate map value")
+	}
+
+	mvnode := ast.MappingValue(tk, key, value)
+	mvnode.SetPath(ctx.withChild(keyText).path)
+	node := ast.Mapping(tk, false, mvnode)
+	node.SetPath(ctx.withChild(keyText).path)
+
+	ntk := ctx.nextNotCommentToken()
+	antk := ctx.afterNextNotCommentToken()
+	for antk != nil && antk.Type == token.MappingValueType &&
+		ntk.Position.Column == key.GetToken().Position.Column {
+		ctx.progressIgnoreComment(1)
+		value, err := p.parseToken(ctx, ctx.currentToken())
+		if err != nil {
+			return nil, errors.Wrapf(err, "failed to parse mapping node")
+		}
+		switch value.Type() {
+		case ast.MappingType:
+			c := value.(*ast.MappingNode)
+			comment := c.GetComment()
+			for idx, v := range c.Values {
+				if idx == 0 && comment != nil {
+					if err := v.SetComment(comment); err != nil {
+						return nil, errors.Wrapf(err, "failed to set comment token to node")
+					}
+				}
+				node.Values = append(node.Values, v)
+			}
+		case ast.MappingValueType:
+			node.Values = append(node.Values, value.(*ast.MappingValueNode))
+		default:
+			return nil, xerrors.Errorf("failed to parse mapping value node node is %s", value.Type())
+		}
+		ntk = ctx.nextNotCommentToken()
+		antk = ctx.afterNextNotCommentToken()
+	}
+	if len(node.Values) == 1 {
+		mapKeyCol := mvnode.Key.GetToken().Position.Column
+		commentTk := ctx.nextToken()
+		if commentTk != nil && commentTk.Type == token.CommentType && mapKeyCol <= commentTk.Position.Column {
+			// If the comment is in the same or deeper column as the last element column in map value,
+			// treat it as a footer comment for the last element.
+			comment := p.parseFootComment(ctx, mapKeyCol)
+			mvnode.FootComment = comment
+		}
+		return mvnode, nil
+	}
+	mapCol := node.GetToken().Position.Column
+	commentTk := ctx.nextToken()
+	if commentTk != nil && commentTk.Type == token.CommentType && mapCol <= commentTk.Position.Column {
+		// If the comment is in the same or deeper column as the last element column in map value,
+		// treat it as a footer comment for the last element.
+		comment := p.parseFootComment(ctx, mapCol)
+		node.FootComment = comment
+	}
+	return node, nil
+}
+
+func (p *parser) parseSequenceEntry(ctx *context) (*ast.SequenceNode, error) {
+	tk := ctx.currentToken()
+	sequenceNode := ast.Sequence(tk, false)
+	sequenceNode.SetPath(ctx.path)
+	curColumn := tk.Position.Column
+	for tk.Type == token.SequenceEntryType {
+		ctx.progress(1) // skip sequence token
+		tk = ctx.currentToken()
+		if tk == nil {
+			return nil, errors.ErrSyntax("empty sequence entry", ctx.previousToken())
+		}
+		var comment *ast.CommentGroupNode
+		if tk.Type == token.CommentType {
+			comment = p.parseCommentOnly(ctx)
+			tk = ctx.currentToken()
+			if tk.Type != token.SequenceEntryType {
+				break
+			}
+			ctx.progress(1) // skip sequence token
+		}
+		value, err := p.parseToken(ctx.withIndex(uint(len(sequenceNode.Values))), ctx.currentToken())
+		if err != nil {
+			return nil, errors.Wrapf(err, "failed to parse sequence")
+		}
+		if comment != nil {
+			comment.SetPath(ctx.withIndex(uint(len(sequenceNode.Values))).path)
+			sequenceNode.ValueHeadComments = append(sequenceNode.ValueHeadComments, comment)
+		} else {
+			sequenceNode.ValueHeadComments = append(sequenceNode.ValueHeadComments, nil)
+		}
+		sequenceNode.Values = append(sequenceNode.Values, value)
+		tk = ctx.nextNotCommentToken()
+		if tk == nil {
+			break
+		}
+		if tk.Type != token.SequenceEntryType {
+			break
+		}
+		if tk.Position.Column != curColumn {
+			break
+		}
+		ctx.progressIgnoreComment(1)
+	}
+	commentTk := ctx.nextToken()
+	if commentTk != nil && commentTk.Type == token.CommentType && curColumn <= commentTk.Position.Column {
+		// If the comment is in the same or deeper column as the last element column in sequence value,
+		// treat it as a footer comment for the last element.
+		comment := p.parseFootComment(ctx, curColumn)
+		sequenceNode.FootComment = comment
+	}
+	return sequenceNode, nil
+}
+
+func (p *parser) parseAnchor(ctx *context) (*ast.AnchorNode, error) {
+	tk := ctx.currentToken()
+	anchor := ast.Anchor(tk)
+	anchor.SetPath(ctx.path)
+	ntk := ctx.nextToken()
+	if ntk == nil {
+		return nil, errors.ErrSyntax("unexpected anchor. anchor name is undefined", tk)
+	}
+	ctx.progress(1) // skip anchor token
+	name, err := p.parseToken(ctx, ctx.currentToken())
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parser anchor name node")
+	}
+	anchor.Name = name
+	ntk = ctx.nextToken()
+	if ntk == nil {
+		return nil, errors.ErrSyntax("unexpected anchor. anchor value is undefined", ctx.currentToken())
+	}
+	ctx.progress(1)
+	value, err := p.parseToken(ctx, ctx.currentToken())
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parser anchor name node")
+	}
+	anchor.Value = value
+	return anchor, nil
+}
+
+func (p *parser) parseAlias(ctx *context) (*ast.AliasNode, error) {
+	tk := ctx.currentToken()
+	alias := ast.Alias(tk)
+	alias.SetPath(ctx.path)
+	ntk := ctx.nextToken()
+	if ntk == nil {
+		return nil, errors.ErrSyntax("unexpected alias. alias name is undefined", tk)
+	}
+	ctx.progress(1) // skip alias token
+	name, err := p.parseToken(ctx, ctx.currentToken())
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parser alias name node")
+	}
+	alias.Value = name
+	return alias, nil
+}
+
+func (p *parser) parseMapKey(ctx *context) (ast.MapKeyNode, error) {
+	tk := ctx.currentToken()
+	if value := p.parseScalarValue(tk); value != nil {
+		return value, nil
+	}
+	switch tk.Type {
+	case token.MergeKeyType:
+		return ast.MergeKey(tk), nil
+	case token.MappingKeyType:
+		return p.parseMappingKey(ctx)
+	}
+	return nil, errors.ErrSyntax("unexpected mapping key", tk)
+}
+
+func (p *parser) parseStringValue(tk *token.Token) *ast.StringNode {
+	switch tk.Type {
+	case token.StringType,
+		token.SingleQuoteType,
+		token.DoubleQuoteType:
+		return ast.String(tk)
+	}
+	return nil
+}
+
+func (p *parser) parseScalarValueWithComment(ctx *context, tk *token.Token) (ast.ScalarNode, error) {
+	node := p.parseScalarValue(tk)
+	if node == nil {
+		return nil, nil
+	}
+	node.SetPath(ctx.path)
+	if p.isSameLineComment(ctx.nextToken(), node) {
+		ctx.progress(1)
+		if err := p.setSameLineCommentIfExists(ctx, node); err != nil {
+			return nil, errors.Wrapf(err, "failed to set same line comment to node")
+		}
+	}
+	return node, nil
+}
+
+func (p *parser) parseScalarValue(tk *token.Token) ast.ScalarNode {
+	if node := p.parseStringValue(tk); node != nil {
+		return node
+	}
+	switch tk.Type {
+	case token.NullType:
+		return ast.Null(tk)
+	case token.BoolType:
+		return ast.Bool(tk)
+	case token.IntegerType,
+		token.BinaryIntegerType,
+		token.OctetIntegerType,
+		token.HexIntegerType:
+		return ast.Integer(tk)
+	case token.FloatType:
+		return ast.Float(tk)
+	case token.InfinityType:
+		return ast.Infinity(tk)
+	case token.NanType:
+		return ast.Nan(tk)
+	}
+	return nil
+}
+
+func (p *parser) parseDirective(ctx *context) (*ast.DirectiveNode, error) {
+	node := ast.Directive(ctx.currentToken())
+	ctx.progress(1) // skip directive token
+	value, err := p.parseToken(ctx, ctx.currentToken())
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parse directive value")
+	}
+	node.Value = value
+	ctx.progress(1)
+	tk := ctx.currentToken()
+	if tk == nil {
+		// Since current token is nil, use the previous token to specify
+		// the syntax error location.
+		return nil, errors.ErrSyntax("unexpected directive value. document not started", ctx.previousToken())
+	}
+	if tk.Type != token.DocumentHeaderType {
+		return nil, errors.ErrSyntax("unexpected directive value. document not started", ctx.currentToken())
+	}
+	return node, nil
+}
+
+func (p *parser) parseLiteral(ctx *context) (*ast.LiteralNode, error) {
+	node := ast.Literal(ctx.currentToken())
+	ctx.progress(1) // skip literal/folded token
+
+	tk := ctx.currentToken()
+	var comment *ast.CommentGroupNode
+	if tk.Type == token.CommentType {
+		comment = p.parseCommentOnly(ctx)
+		comment.SetPath(ctx.path)
+		if err := node.SetComment(comment); err != nil {
+			return nil, errors.Wrapf(err, "failed to set comment to literal")
+		}
+		tk = ctx.currentToken()
+	}
+	value, err := p.parseToken(ctx, tk)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parse literal/folded value")
+	}
+	snode, ok := value.(*ast.StringNode)
+	if !ok {
+		return nil, errors.ErrSyntax("unexpected token. required string token", value.GetToken())
+	}
+	node.Value = snode
+	return node, nil
+}
+
+func (p *parser) isSameLineComment(tk *token.Token, node ast.Node) bool {
+	if tk == nil {
+		return false
+	}
+	if tk.Type != token.CommentType {
+		return false
+	}
+	return tk.Position.Line == node.GetToken().Position.Line
+}
+
+func (p *parser) setSameLineCommentIfExists(ctx *context, node ast.Node) error {
+	tk := ctx.currentToken()
+	if !p.isSameLineComment(tk, node) {
+		return nil
+	}
+	comment := ast.CommentGroup([]*token.Token{tk})
+	comment.SetPath(ctx.path)
+	if err := node.SetComment(comment); err != nil {
+		return errors.Wrapf(err, "failed to set comment token to ast.Node")
+	}
+	return nil
+}
+
+func (p *parser) parseDocument(ctx *context) (*ast.DocumentNode, error) {
+	startTk := ctx.currentToken()
+	ctx.progress(1) // skip document header token
+	body, err := p.parseToken(ctx, ctx.currentToken())
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parse document body")
+	}
+	node := ast.Document(startTk, body)
+	if ntk := ctx.nextToken(); ntk != nil && ntk.Type == token.DocumentEndType {
+		node.End = ntk
+		ctx.progress(1)
+	}
+	return node, nil
+}
+
+func (p *parser) parseCommentOnly(ctx *context) *ast.CommentGroupNode {
+	commentTokens := []*token.Token{}
+	for {
+		tk := ctx.currentToken()
+		if tk == nil {
+			break
+		}
+		if tk.Type != token.CommentType {
+			break
+		}
+		commentTokens = append(commentTokens, tk)
+		ctx.progressIgnoreComment(1) // skip comment token
+	}
+	return ast.CommentGroup(commentTokens)
+}
+
+func (p *parser) parseFootComment(ctx *context, col int) *ast.CommentGroupNode {
+	commentTokens := []*token.Token{}
+	for {
+		ctx.progressIgnoreComment(1)
+		commentTokens = append(commentTokens, ctx.currentToken())
+
+		nextTk := ctx.nextToken()
+		if nextTk == nil {
+			break
+		}
+		if nextTk.Type != token.CommentType {
+			break
+		}
+		if col > nextTk.Position.Column {
+			break
+		}
+	}
+	return ast.CommentGroup(commentTokens)
+}
+
+func (p *parser) parseComment(ctx *context) (ast.Node, error) {
+	group := p.parseCommentOnly(ctx)
+	node, err := p.parseToken(ctx, ctx.currentToken())
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parse node after comment")
+	}
+	if node == nil {
+		return group, nil
+	}
+	group.SetPath(node.GetPath())
+	if err := node.SetComment(group); err != nil {
+		return nil, errors.Wrapf(err, "failed to set comment token to node")
+	}
+	return node, nil
+}
+
+func (p *parser) parseMappingKey(ctx *context) (*ast.MappingKeyNode, error) {
+	keyTk := ctx.currentToken()
+	node := ast.MappingKey(keyTk)
+	node.SetPath(ctx.path)
+	ctx.progress(1) // skip mapping key token
+	value, err := p.parseToken(ctx.withChild(keyTk.Value), ctx.currentToken())
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parse map key")
+	}
+	node.Value = value
+	return node, nil
+}
+
+func (p *parser) parseToken(ctx *context, tk *token.Token) (ast.Node, error) {
+	node, err := p.createNodeFromToken(ctx, tk)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to create node from token")
+	}
+	if node != nil && node.GetPath() == "" {
+		node.SetPath(ctx.path)
+	}
+	return node, nil
+}
+
+func (p *parser) createNodeFromToken(ctx *context, tk *token.Token) (ast.Node, error) {
+	if tk == nil {
+		return nil, nil
+	}
+	if tk.NextType() == token.MappingValueType {
+		node, err := p.parseMappingValue(ctx)
+		return node, err
+	}
+	node, err := p.parseScalarValueWithComment(ctx, tk)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parse scalar value")
+	}
+	if node != nil {
+		return node, nil
+	}
+	switch tk.Type {
+	case token.CommentType:
+		return p.parseComment(ctx)
+	case token.MappingKeyType:
+		return p.parseMappingKey(ctx)
+	case token.DocumentHeaderType:
+		return p.parseDocument(ctx)
+	case token.MappingStartType:
+		return p.parseMapping(ctx)
+	case token.SequenceStartType:
+		return p.parseSequence(ctx)
+	case token.SequenceEntryType:
+		return p.parseSequenceEntry(ctx)
+	case token.AnchorType:
+		return p.parseAnchor(ctx)
+	case token.AliasType:
+		return p.parseAlias(ctx)
+	case token.DirectiveType:
+		return p.parseDirective(ctx)
+	case token.TagType:
+		return p.parseTag(ctx)
+	case token.LiteralType, token.FoldedType:
+		return p.parseLiteral(ctx)
+	}
+	return nil, nil
+}
+
+func (p *parser) parse(tokens token.Tokens, mode Mode) (*ast.File, error) {
+	ctx := newContext(tokens, mode)
+	file := &ast.File{Docs: []*ast.DocumentNode{}}
+	for ctx.next() {
+		node, err := p.parseToken(ctx, ctx.currentToken())
+		if err != nil {
+			return nil, errors.Wrapf(err, "failed to parse")
+		}
+		ctx.progressIgnoreComment(1)
+		if node == nil {
+			continue
+		}
+		if doc, ok := node.(*ast.DocumentNode); ok {
+			file.Docs = append(file.Docs, doc)
+		} else {
+			file.Docs = append(file.Docs, ast.Document(nil, node))
+		}
+	}
+	return file, nil
+}
+
+type Mode uint
+
+const (
+	ParseComments Mode = 1 << iota // parse comments and add them to AST
+)
+
+// ParseBytes parse from byte slice, and returns ast.File
+func ParseBytes(bytes []byte, mode Mode) (*ast.File, error) {
+	tokens := lexer.Tokenize(string(bytes))
+	f, err := Parse(tokens, mode)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parse")
+	}
+	return f, nil
+}
+
+// Parse parse from token instances, and returns ast.File
+func Parse(tokens token.Tokens, mode Mode) (*ast.File, error) {
+	var p parser
+	f, err := p.parse(tokens, mode)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parse")
+	}
+	return f, nil
+}
+
+// Parse parse from filename, and returns ast.File
+func ParseFile(filename string, mode Mode) (*ast.File, error) {
+	file, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to read file: %s", filename)
+	}
+	f, err := ParseBytes(file, mode)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to parse")
+	}
+	f.Name = filename
+	return f, nil
+}