class SyntaxTree::Parser

def on_rational(value)

on_rational: (String value) -> RationalLiteral
:call-seq: 
def on_rational(value)
  RationalLiteral.new(
    value: value,
    location:
      Location.token(
        line: lineno,
        char: char_pos,
        column: current_column,
        size: value.size
      )
  )
end