Module: Autotype::TypeString

Defined in:
lib/autotype/type_string.rb

Class Method Summary collapse

Class Method Details

.parse(string) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/autotype/type_string.rb', line 7

def parse(string)
  string = string.to_s.strip
  raise ArgumentError, "type string cannot be empty" if string.empty?

  if string.include?("|")
    members = string.split("|").map { parse(_1.strip) }
    return members.first if members.length == 1

    return Union.new(members.uniq)
  end

  if (match = string.match(/\A([A-Za-z_][\w:]*)\[(.*)\]\z/m))
    name = match[1]
    args = split_args(match[2]).map { parse(_1) }
    return Generic.new(name, args)
  end

  Named.new(string)
end

.split_args(source) ⇒ Object 



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# File 'lib/autotype/type_string.rb', line 27

def split_args(source)
  args = []
  depth = 0
  start = 0
  source.each_char.with_index do |char, index|
    case char
    when "["
      depth += 1
    when "]"
      depth -= 1
    when ","
      if depth.zero?
        args << source[start...index]
        start = index + 1
      end
    end
  end
  args << source[start..]
  args.map(&:strip).reject(&:empty?)
end