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Contents
# frozen_string_literal: true
module Mustermann
class Sinatra < AST::Pattern
# Generates a string that can safely be concatenated with other strings
# without chaning its semantics
# @see #safe_string
# @!visibility private
SafeRenderer = AST::Translator.create do
translate(:splat, :named_splat) { "{+#{name}}" }
translate(:char, :separator) { Sinatra.escape(payload) }
translate(:root) { t(payload) }
translate(:group) { "(#{t(payload)})" }
translate(:union) { "(#{t(payload, join: ?|)})" }
translate(:optional) { "#{t(payload)}?" }
translate(:with_look_ahead) { t([head, payload]) }
translate(Array) { |join: ""| map { |e| t(e) }.join(join) }
translate(:capture) do
raise Mustermann::Error, 'cannot render variables' if node.is_a? :variable
raise Mustermann::Error, 'cannot translate constraints' if constraint or qualifier or convert
prefix = node.is_a?(:splat) ? "+" : ""
"{#{prefix}#{name}}"
end
end
private_constant :SafeRenderer
end
end
Version data entries
21 entries across 18 versions & 4 rubygems