Add go dependencies for mdtoc

vendor/github.com/mmarkdown/mmark/mast/reference/reference.go

@@ -0,0 +1,71 @@
+// Package reference defines the elements of a <reference> block.
+package reference
+
+import "encoding/xml"
+
+// Author is the reference author.
+type Author struct {
+	Fullname     string        `xml:"fullname,attr,omitempty"`
+	Initials     string        `xml:"initials,attr,omitempty"`
+	Surname      string        `xml:"surname,attr,omitempty"`
+	Role         string        `xml:"role,attr,omitempty"`
+	Organization *Organization `xml:"organization,omitempty"`
+	Address      *Address      `xml:"address,omitempty"`
+}
+
+type Organization struct {
+	Abbrev string `xml:"abbrev,attr,omitempty"`
+	Value  string `xml:",chardata"`
+}
+
+// this is copied from ../title.go; it might make sense to unify them, both especially, it we
+// want to allow reference to be given in TOML as well. See #55.
+// Author denotes an RFC author.
+
+// Address denotes the address of an RFC author.
+type Address struct {
+	Phone  string        `xml:"phone,omitempty"`
+	Email  string        `xml:"email,omitempty"`
+	URI    string        `xml:"uri,omitempty"`
+	Postal AddressPostal `xml:"postal,omitempty"`
+}
+
+// AddressPostal denotes the postal address of an RFC author.
+type AddressPostal struct {
+	PostalLine []string `xml:"postalline,omitempty"`
+
+	Streets   []string `xml:"street,omitempty"`
+	Cities    []string `xml:"city,omitempty"`
+	Codes     []string `xml:"code,omitempty"`
+	Countries []string `xml:"country,omitempty"`
+	Regions   []string `xml:"region,omitempty"`
+}
+
+// Date is the reference date.
+type Date struct {
+	Year  string `xml:"year,attr,omitempty"`
+	Month string `xml:"month,attr,omitempty"`
+	Day   string `xml:"day,attr,omitempty"`
+}
+
+// Front the reference <front>.
+type Front struct {
+	Title   string   `xml:"title"`
+	Authors []Author `xml:"author,omitempty"`
+	Date    Date     `xml:"date"`
+}
+
+// Format is the reference <format>. This is deprecated in RFC 7991, see Section 3.3.
+type Format struct {
+	Type   string `xml:"type,attr,omitempty"`
+	Target string `xml:"target,attr"`
+}
+
+// Reference is the entire <reference> structure.
+type Reference struct {
+	XMLName xml.Name `xml:"reference"`
+	Anchor  string   `xml:"anchor,attr"`
+	Front   Front    `xml:"front"`
+	Format  *Format  `xml:"format,omitempty"`
+	Target  string   `xml:"target,attr"`
+}