Class: Pure::Parser::Ripper::Processor

Inherits:
Object
  • Object
show all
Defined in:
lib/pure/parser/impl/ripper.rb

Constant Summary collapse

FUN_RE = 
%r!\Afun(_map)?\Z!

Instance Method Summary collapse

Constructor Details

#initialize(file) ⇒ Processor

Returns a new instance of Processor.



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# File 'lib/pure/parser/impl/ripper.rb', line 15

def initialize(file)
  @file = file
  @defs = Hash.new
end

Instance Method Details

#process(sexp) ⇒ Object 



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# File 'lib/pure/parser/impl/ripper.rb', line 86

def process(sexp)
  if sexp.is_a? Array
    process_def(sexp)
    process_fun(sexp)
    sexp.each { |sub_sexp|
      process(sub_sexp)
    }
  end
end

#process_def(sexp) ⇒ Object 



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# File 'lib/pure/parser/impl/ripper.rb', line 25

def process_def(sexp)
  if sexp[0] == :def
    name = sexp[1][1].to_sym
    line = sexp[1][2][0]
    params = (
      case sexp[2].first
      when :params
        sexp[2]
      when :paren
        sexp[2][1]
      #else
      #  raise ParseError.new(@file, line, "unforeseen `def' syntax"
      end
    )
    args = (
      if params[1].nil?
        []
      else
        params[1].map { |t| t[1].to_sym }
      end
    )
    splat = params.any? { |t| t.is_a?(Array) and t[0] == :rest_param }
    default = !!params[2]
    @defs[line] = {
      :name => name,
      :args => args,
      :code => sexp,
      :splat => splat,
      :default => default,
    }
  end
end

#process_fun(sexp) ⇒ Object 



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# File 'lib/pure/parser/impl/ripper.rb', line 60

def process_fun(sexp)
  if sexp[0] == :method_add_block and sexp[1].is_a?(Array)
    line = (
      if sexp[1][0] == :command and
          sexp[1][1].is_a?(Array) and
          sexp[1][1][1] =~ FUN_RE
        sexp[1][1][2][0]
      elsif sexp[1][0] == :method_add_arg and
          sexp[1][1].is_a?(Array) and
          sexp[1][1][0] == :fcall and
          sexp[1][1][1].is_a?(Array) and
          sexp[1][1][1][1] =~ FUN_RE
        sexp[1][1][1][2][0]
      else
        nil
      end
    )
    if line
      @defs[line] = {
        :name => :__fun,
        :code => sexp[2],
      }
    end
  end
end

#run ⇒ Object 



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# File 'lib/pure/parser/impl/ripper.rb', line 20

def run
  process(::Ripper.sexp(File.read(@file)))
  @defs
end