40 lines
966 B
Go
40 lines
966 B
Go
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package parser
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import (
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"github.com/a-h/parse"
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)
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var htmlCommentStart = parse.String("<!--")
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var htmlCommentEnd = parse.String("--")
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type htmlCommentParser struct {
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}
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var htmlComment = htmlCommentParser{}
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func (p htmlCommentParser) Parse(pi *parse.Input) (n Node, ok bool, err error) {
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// Comment start.
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start := pi.Position()
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var c HTMLComment
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if _, ok, err = htmlCommentStart.Parse(pi); err != nil || !ok {
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return
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}
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// Once we've got the comment start sequence, parse anything until the end
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// sequence as the comment contents.
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if c.Contents, ok, err = parse.StringUntil(htmlCommentEnd).Parse(pi); err != nil || !ok {
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err = parse.Error("expected end comment literal '-->' not found", start)
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return
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}
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// Cut the end element.
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_, _, _ = htmlCommentEnd.Parse(pi)
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// Cut the gt.
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if _, ok, err = gt.Parse(pi); err != nil || !ok {
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err = parse.Error("comment contains invalid sequence '--'", pi.Position())
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return
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}
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return c, true, nil
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}
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