54 lines
1.1 KiB
Ruby
54 lines
1.1 KiB
Ruby
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require 'ripper'
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module Hamlit
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class HashParser
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def self.parse(text)
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self.new.parse(text)
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end
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def parse(text)
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hash = {}
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tokens = lex_as_hash(text)
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each_attr(tokens) do |attr_tokens|
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key = parse_key!(attr_tokens)
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hash[key] = attr_tokens.map(&:last).join.strip
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end
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hash
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end
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private
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def lex_as_hash(text)
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tokens = Ripper.lex('{' << text.strip << '}'.freeze)
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tokens[1..-2] || []
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end
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def parse_key!(tokens)
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_, type, str = tokens.shift
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case type
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when :on_sp
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parse_key!(tokens)
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when :on_label
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str.tr(':', '')
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else
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raise InternalError.new("Unexpected type: #{type}")
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end
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end
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def each_attr(tokens)
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attr_tokens = []
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tokens.each do |token|
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(row, col), type, str = token
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case type
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when :on_comma
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yield(attr_tokens)
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attr_tokens = []
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else
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attr_tokens << token
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end
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end
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yield(attr_tokens) unless attr_tokens.empty?
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end
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end
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end
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