53 lines
1.3 KiB
Go
53 lines
1.3 KiB
Go
package parser
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import (
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"github.com/a-h/parse"
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"github.com/a-h/templ/parser/v2/goexpression"
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)
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var forExpression parse.Parser[Node] = forExpressionParser{}
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type forExpressionParser struct{}
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func (forExpressionParser) Parse(pi *parse.Input) (n Node, ok bool, err error) {
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var r ForExpression
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start := pi.Index()
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// Strip leading whitespace and look for `for `.
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if _, _, err = parse.OptionalWhitespace.Parse(pi); err != nil {
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return r, false, err
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}
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if !peekPrefix(pi, "for ") {
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pi.Seek(start)
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return r, false, nil
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}
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// Parse the Go for expression.
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if r.Expression, err = parseGo("for", pi, goexpression.For); err != nil {
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return r, false, err
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}
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// Eat " {\n".
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if _, ok, err = parse.All(openBraceWithOptionalPadding, parse.NewLine).Parse(pi); err != nil || !ok {
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pi.Seek(start)
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return r, false, err
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}
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// Node contents.
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tnp := newTemplateNodeParser(closeBraceWithOptionalPadding, "for expression closing brace")
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var nodes Nodes
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if nodes, ok, err = tnp.Parse(pi); err != nil || !ok {
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err = parse.Error("for: expected nodes, but none were found", pi.Position())
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return
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}
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r.Children = nodes.Nodes
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// Read the required closing brace.
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if _, ok, err = closeBraceWithOptionalPadding.Parse(pi); err != nil || !ok {
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err = parse.Error("for: "+unterminatedMissingEnd, pi.Position())
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return
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}
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return r, true, nil
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}
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