Class: CapriccIo::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/capriccio/parser.rb

Class Method Summary collapse

Class Method Details

.parse(code, line) ⇒ Object 



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# File 'lib/capriccio/parser.rb', line 7

def self.parse(code, line)
  code = code.strip
  i = 0
  message = nil
  messages = []

  while i < code.size
    case code[i..-1]
    when /\A("[^"]*")/, # string
      /\A(\d+)/,        # number
      /\A(\.)+/,        # dot
      /\A(\n)+/,        # line break
      /\A(\w+)/         # name
      m = Message.new(Regexp.last_match(1), line)
      if messages.empty?
        messages << m
      else
        message.next = m
      end
      line += Regexp.last_match(1).count("\n")
      message = m
      i += Regexp.last_match(1).size - 1

    when /\A(\(\s*)/    # arguments
      start = i + Regexp.last_match(1).size
      level = 1
      while level.positive? && i < code.size
        i += 1
        level += 1 if code[i] == '('
        level -= 1 if code[i] == ')'
      end
      line += Regexp.last_match(1).count("\n")
      code_chunk = code[start..i - 1]
      message.args = parse(code_chunk, line)
      line += code_chunk.count("\n")

    when /\A,(\s*)/
      line += Regexp.last_match(1).count("\n")
      messages.concat parse(code[i + 1..-1], line)
      break

    when /\A(\s+)/, # ignore whitespace
      /\A(#.*$)/    # ignore comments
      line += Regexp.last_match(1).count("\n")
      i += Regexp.last_match(1).size - 1

    else
      raise "Unknown char #{code[i].inspect} at line #{line}"
    end
    i += 1
  end
  messages
end