gigaparsec/internal/bindgen/bind.go.tmpl

{{/* SPDX-License-Identifier: Unlicense */ -}}

{{define "fparams" -}}
{{with $max := .}}{{range .Count}}	f{{.}} func(T{{.}}) Parser[In, {{if eq . $max}}Out{{else}}T{{.Next}}{{end}}],
{{end}}{{end}}{{end -}}

{{define "func" -}}
{{if eq . 1}}// Bind combines p with a parser created by f that depends on p's result value.
{{- else}}// Bind{{.}} is equivalent to {{.}} nested calls to Bind.{{end}}
func Bind{{.}}[In, Out{{range .Count}}, T{{.}}{{end}} any](
	p Parser[In, T],
{{template "fparams" .}}) Parser[In, Out] {
	return func(s State[In]) (Result[In, Out], error) {
		var anyConsumed bool
		var next = s
{{range .Next.Count}}
		r{{.}}, err := {{if eq . 1}}p(next){{else}}f{{.Prev}}(val{{.Prev}})(next){{end}}
		if err != nil {
			return Result[In, Out]{}, err
		}
		anyConsumed = anyConsumed || r{{.}}.Consumed()
		success, val{{.}}, next := r{{.}}.Status()
		if !success {
			return Fail[In, Out](anyConsumed, r{{.}}.Message()), nil
		}
{{end}}
		return Succeed(anyConsumed, val{{.Next}}, next, MessageOK(s.Pos())), nil
	}
}{{end -}}

// GENERATED FILE. DO NOT EDIT.

// SPDX-License-Identifier: Unlicense

package {{.Package}}
{{range .Count}}
{{template "func" .}}
{{end}}