func NewTable(opts ...TableOption) goldmark.Extender {
	return &table{
		options: opts,
	}
}
NewTable returns a new extension with given options.
package extension
import (
	"bytes"
	"fmt"
	"regexp"
	"github.com/yuin/goldmark"
	gast "github.com/yuin/goldmark/ast"
	"github.com/yuin/goldmark/extension/ast"
	"github.com/yuin/goldmark/parser"
	"github.com/yuin/goldmark/renderer"
	"github.com/yuin/goldmark/renderer/html"
	"github.com/yuin/goldmark/text"
	"github.com/yuin/goldmark/util"
)
var escapedPipeCellListKey = parser.NewContextKey()
type escapedPipeCell struct {
	Cell        *ast.TableCell
	Pos         []int
	Transformed bool
}
type TableCellAlignMethod int
const (
	TableCellAlignDefault TableCellAlignMethod = iota
	TableCellAlignAttribute
	TableCellAlignStyle
	TableCellAlignNone
)
type TableConfig struct {
	html.Config
	TableCellAlignMethod TableCellAlignMethod
}
type TableOption interface {
	renderer.Option
	SetTableOption(*TableConfig)
}
func NewTableConfig() TableConfig {
	return TableConfig{
		Config:               html.NewConfig(),
		TableCellAlignMethod: TableCellAlignDefault,
	}
}
func (c *TableConfig) SetOption(name renderer.OptionName, value interface{}) {
	switch name {
	case optTableCellAlignMethod:
		c.TableCellAlignMethod = value.(TableCellAlignMethod)
	default:
		c.Config.SetOption(name, value)
	}
}
type withTableHTMLOptions struct {
	value []html.Option
}
func (o *withTableHTMLOptions) SetConfig(c *renderer.Config) {
	if o.value != nil {
		for _, v := range o.value {
			v.(renderer.Option).SetConfig(c)
		}
	}
}
func (o *withTableHTMLOptions) SetTableOption(c *TableConfig) {
	if o.value != nil {
		for _, v := range o.value {
			v.SetHTMLOption(&c.Config)
		}
	}
}
func WithTableHTMLOptions(opts ...html.Option) TableOption {
	return &withTableHTMLOptions{opts}
}
const optTableCellAlignMethod renderer.OptionName = "TableTableCellAlignMethod"
type withTableCellAlignMethod struct {
	value TableCellAlignMethod
}
func (o *withTableCellAlignMethod) SetConfig(c *renderer.Config) {
	c.Options[optTableCellAlignMethod] = o.value
}
func (o *withTableCellAlignMethod) SetTableOption(c *TableConfig) {
	c.TableCellAlignMethod = o.value
}
func WithTableCellAlignMethod(a TableCellAlignMethod) TableOption {
	return &withTableCellAlignMethod{a}
}
func isTableDelim(bs []byte) bool {
	for _, b := range bs {
		if !(util.IsSpace(b) || b == '-' || b == '|' || b == ':') {
			return false
		}
	}
	return true
}
var tableDelimLeft = regexp.MustCompile(`^\s*\:\-+\s*$`)
var tableDelimRight = regexp.MustCompile(`^\s*\-+\:\s*$`)
var tableDelimCenter = regexp.MustCompile(`^\s*\:\-+\:\s*$`)
var tableDelimNone = regexp.MustCompile(`^\s*\-+\s*$`)
type tableParagraphTransformer struct {
}
var defaultTableParagraphTransformer = &tableParagraphTransformer{}
func NewTableParagraphTransformer() parser.ParagraphTransformer {
	return defaultTableParagraphTransformer
}
func (b *tableParagraphTransformer) Transform(node *gast.Paragraph, reader text.Reader, pc parser.Context) {
	lines := node.Lines()
	if lines.Len() < 2 {
		return
	}
	for i := 1; i < lines.Len(); i++ {
		alignments := b.parseDelimiter(lines.At(i), reader)
		if alignments == nil {
			continue
		}
		header := b.parseRow(lines.At(i-1), alignments, true, reader, pc)
		if header == nil || len(alignments) != header.ChildCount() {
			return
		}
		table := ast.NewTable()
		table.Alignments = alignments
		table.AppendChild(table, ast.NewTableHeader(header))
		for j := i + 1; j < lines.Len(); j++ {
			table.AppendChild(table, b.parseRow(lines.At(j), alignments, false, reader, pc))
		}
		node.Lines().SetSliced(0, i-1)
		node.Parent().InsertAfter(node.Parent(), node, table)
		if node.Lines().Len() == 0 {
			node.Parent().RemoveChild(node.Parent(), node)
		} else {
			last := node.Lines().At(i - 2)
			last.Stop = last.Stop - 1  
			node.Lines().Set(i-2, last)
		}
	}
}
func (b *tableParagraphTransformer) parseRow(segment text.Segment, alignments []ast.Alignment, isHeader bool, reader text.Reader, pc parser.Context) *ast.TableRow {
	source := reader.Source()
	line := segment.Value(source)
	pos := 0
	pos += util.TrimLeftSpaceLength(line)
	limit := len(line)
	limit -= util.TrimRightSpaceLength(line)
	row := ast.NewTableRow(alignments)
	if len(line) > 0 && line[pos] == '|' {
		pos++
	}
	if len(line) > 0 && line[limit-1] == '|' {
		limit--
	}
	i := 0
	for ; pos < limit; i++ {
		alignment := ast.AlignNone
		if i >= len(alignments) {
			if !isHeader {
				return row
			}
		} else {
			alignment = alignments[i]
		}
		var escapedCell *escapedPipeCell
		node := ast.NewTableCell()
		node.Alignment = alignment
		hasBacktick := false
		closure := pos
		for ; closure < limit; closure++ {
			if line[closure] == '`' {
				hasBacktick = true
			}
			if line[closure] == '|' {
				if closure == 0 || line[closure-1] != '\\' {
					break
				} else if hasBacktick {
					if escapedCell == nil {
						escapedCell = &escapedPipeCell{node, []int{}, false}
						escapedList := pc.ComputeIfAbsent(escapedPipeCellListKey,
							func() interface{} {
								return []*escapedPipeCell{}
							}).([]*escapedPipeCell)
						escapedList = append(escapedList, escapedCell)
						pc.Set(escapedPipeCellListKey, escapedList)
					}
					escapedCell.Pos = append(escapedCell.Pos, segment.Start+closure-1)
				}
			}
		}
		seg := text.NewSegment(segment.Start+pos, segment.Start+closure)
		seg = seg.TrimLeftSpace(source)
		seg = seg.TrimRightSpace(source)
		node.Lines().Append(seg)
		row.AppendChild(row, node)
		pos = closure + 1
	}
	for ; i < len(alignments); i++ {
		row.AppendChild(row, ast.NewTableCell())
	}
	return row
}
func (b *tableParagraphTransformer) parseDelimiter(segment text.Segment, reader text.Reader) []ast.Alignment {
	line := segment.Value(reader.Source())
	if !isTableDelim(line) {
		return nil
	}
	cols := bytes.Split(line, []byte{'|'})
	if util.IsBlank(cols[0]) {
		cols = cols[1:]
	}
	if len(cols) > 0 && util.IsBlank(cols[len(cols)-1]) {
		cols = cols[:len(cols)-1]
	}
	var alignments []ast.Alignment
	for _, col := range cols {
		if tableDelimLeft.Match(col) {
			alignments = append(alignments, ast.AlignLeft)
		} else if tableDelimRight.Match(col) {
			alignments = append(alignments, ast.AlignRight)
		} else if tableDelimCenter.Match(col) {
			alignments = append(alignments, ast.AlignCenter)
		} else if tableDelimNone.Match(col) {
			alignments = append(alignments, ast.AlignNone)
		} else {
			return nil
		}
	}
	return alignments
}
type tableASTTransformer struct {
}
var defaultTableASTTransformer = &tableASTTransformer{}
func NewTableASTTransformer() parser.ASTTransformer {
	return defaultTableASTTransformer
}
func (a *tableASTTransformer) Transform(node *gast.Document, reader text.Reader, pc parser.Context) {
	lst := pc.Get(escapedPipeCellListKey)
	if lst == nil {
		return
	}
	pc.Set(escapedPipeCellListKey, nil)
	for _, v := range lst.([]*escapedPipeCell) {
		if v.Transformed {
			continue
		}
		_ = gast.Walk(v.Cell, func(n gast.Node, entering bool) (gast.WalkStatus, error) {
			if !entering || n.Kind() != gast.KindCodeSpan {
				return gast.WalkContinue, nil
			}
			for c := n.FirstChild(); c != nil; {
				next := c.NextSibling()
				if c.Kind() != gast.KindText {
					c = next
					continue
				}
				parent := c.Parent()
				ts := &c.(*gast.Text).Segment
				n := c
				for _, v := range lst.([]*escapedPipeCell) {
					for _, pos := range v.Pos {
						if ts.Start <= pos && pos < ts.Stop {
							segment := n.(*gast.Text).Segment
							n1 := gast.NewRawTextSegment(segment.WithStop(pos))
							n2 := gast.NewRawTextSegment(segment.WithStart(pos + 1))
							parent.InsertAfter(parent, n, n1)
							parent.InsertAfter(parent, n1, n2)
							parent.RemoveChild(parent, n)
							n = n2
							v.Transformed = true
						}
					}
				}
				c = next
			}
			return gast.WalkContinue, nil
		})
	}
}
type TableHTMLRenderer struct {
	TableConfig
}
func NewTableHTMLRenderer(opts ...TableOption) renderer.NodeRenderer {
	r := &TableHTMLRenderer{
		TableConfig: NewTableConfig(),
	}
	for _, opt := range opts {
		opt.SetTableOption(&r.TableConfig)
	}
	return r
}
func (r *TableHTMLRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
	reg.Register(ast.KindTable, r.renderTable)
	reg.Register(ast.KindTableHeader, r.renderTableHeader)
	reg.Register(ast.KindTableRow, r.renderTableRow)
	reg.Register(ast.KindTableCell, r.renderTableCell)
}
var TableAttributeFilter = html.GlobalAttributeFilter.Extend(
	[]byte("align"),        
	[]byte("bgcolor"),      
	[]byte("border"),       
	[]byte("cellpadding"),  
	[]byte("cellspacing"),  
	[]byte("frame"),        
	[]byte("rules"),        
	[]byte("summary"),      
	[]byte("width"),        
)
func (r *TableHTMLRenderer) renderTable(w util.BufWriter, source []byte, n gast.Node, entering bool) (gast.WalkStatus, error) {
	if entering {
		_, _ = w.WriteString("<table")
		if n.Attributes() != nil {
			html.RenderAttributes(w, n, TableAttributeFilter)
		}
		_, _ = w.WriteString(">\n")
	} else {
		_, _ = w.WriteString("</table>\n")
	}
	return gast.WalkContinue, nil
}
var TableHeaderAttributeFilter = html.GlobalAttributeFilter.Extend(
	[]byte("align"),    
	[]byte("bgcolor"),  
	[]byte("char"),     
	[]byte("charoff"),  
	[]byte("valign"),   
)
func (r *TableHTMLRenderer) renderTableHeader(w util.BufWriter, source []byte, n gast.Node, entering bool) (gast.WalkStatus, error) {
	if entering {
		_, _ = w.WriteString("<thead")
		if n.Attributes() != nil {
			html.RenderAttributes(w, n, TableHeaderAttributeFilter)
		}
		_, _ = w.WriteString(">\n")
		_, _ = w.WriteString("<tr>\n")  
	} else {
		_, _ = w.WriteString("</tr>\n")
		_, _ = w.WriteString("</thead>\n")
		if n.NextSibling() != nil {
			_, _ = w.WriteString("<tbody>\n")
		}
	}
	return gast.WalkContinue, nil
}
var TableRowAttributeFilter = html.GlobalAttributeFilter.Extend(
	[]byte("align"),    
	[]byte("bgcolor"),  
	[]byte("char"),     
	[]byte("charoff"),  
	[]byte("valign"),   
)
func (r *TableHTMLRenderer) renderTableRow(w util.BufWriter, source []byte, n gast.Node, entering bool) (gast.WalkStatus, error) {
	if entering {
		_, _ = w.WriteString("<tr")
		if n.Attributes() != nil {
			html.RenderAttributes(w, n, TableRowAttributeFilter)
		}
		_, _ = w.WriteString(">\n")
	} else {
		_, _ = w.WriteString("</tr>\n")
		if n.Parent().LastChild() == n {
			_, _ = w.WriteString("</tbody>\n")
		}
	}
	return gast.WalkContinue, nil
}
var TableThCellAttributeFilter = html.GlobalAttributeFilter.Extend(
	[]byte("abbr"),  
	[]byte("align"),    
	[]byte("axis"),     
	[]byte("bgcolor"),  
	[]byte("char"),     
	[]byte("charoff"),  
	[]byte("colspan"),  
	[]byte("headers"),  
	[]byte("height"),  
	[]byte("rowspan"),  
	[]byte("scope"),    
	[]byte("valign"),  
	[]byte("width"),   
)
var TableTdCellAttributeFilter = html.GlobalAttributeFilter.Extend(
	[]byte("abbr"),     
	[]byte("align"),    
	[]byte("axis"),     
	[]byte("bgcolor"),  
	[]byte("char"),     
	[]byte("charoff"),  
	[]byte("colspan"),  
	[]byte("headers"),  
	[]byte("height"),  
	[]byte("rowspan"),  
	[]byte("scope"),   
	[]byte("valign"),  
	[]byte("width"),   
)
func (r *TableHTMLRenderer) renderTableCell(w util.BufWriter, source []byte, node gast.Node, entering bool) (gast.WalkStatus, error) {
	n := node.(*ast.TableCell)
	tag := "td"
	if n.Parent().Kind() == ast.KindTableHeader {
		tag = "th"
	}
	if entering {
		fmt.Fprintf(w, "<%s", tag)
		if n.Alignment != ast.AlignNone {
			amethod := r.TableConfig.TableCellAlignMethod
			if amethod == TableCellAlignDefault {
				if r.Config.XHTML {
					amethod = TableCellAlignAttribute
				} else {
					amethod = TableCellAlignStyle
				}
			}
			switch amethod {
			case TableCellAlignAttribute:
				if _, ok := n.AttributeString("align"); !ok {  
					fmt.Fprintf(w, ` align="%s"`, n.Alignment.String())
				}
			case TableCellAlignStyle:
				v, ok := n.AttributeString("style")
				var cob util.CopyOnWriteBuffer
				if ok {
					cob = util.NewCopyOnWriteBuffer(v.([]byte))
					cob.AppendByte(';')
				}
				style := fmt.Sprintf("text-align:%s", n.Alignment.String())
				cob.AppendString(style)
				n.SetAttributeString("style", cob.Bytes())
			}
		}
		if n.Attributes() != nil {
			if tag == "td" {
				html.RenderAttributes(w, n, TableTdCellAttributeFilter)  
			} else {
				html.RenderAttributes(w, n, TableThCellAttributeFilter)  
			}
		}
		_ = w.WriteByte('>')
	} else {
		fmt.Fprintf(w, "</%s>\n", tag)
	}
	return gast.WalkContinue, nil
}
type table struct {
	options []TableOption
}
var Table = &table{
	options: []TableOption{},
}