Module: RubyParserStuff

Included in:
Ruby18Parser, Ruby19Parser, Ruby20Parser
Defined in:
lib/ruby_parser_extras.rb

Defined Under Namespace

Classes: Environment, Keyword, StackState

Constant Summary collapse

VERSION =

SIGH

"3.4.1"
ENCODING_ORDER =

Rhis is in sorted order of occurrence according to charlock_holmes against 500k files, with UTF_8 forced to the top.

Overwrite this contstant if you need something different.

[
  Encoding::UTF_8, # moved to top to reflect default in 2.0
  Encoding::ISO_8859_1,
  Encoding::ISO_8859_2,
  Encoding::ISO_8859_9,
  Encoding::SHIFT_JIS,
  Encoding::WINDOWS_1252,
  Encoding::EUC_JP
]

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#canonicalize_conditions ⇒ Object

Canonicalize conditionals. Eg:

not x ? a : b

becomes:

x ? b : a



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# File 'lib/ruby_parser_extras.rb', line 402

def canonicalize_conditions
  @canonicalize_conditions
end

#comments ⇒ Object (readonly)

Returns the value of attribute comments.



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# File 'lib/ruby_parser_extras.rb', line 97

def comments
  @comments
end

#env ⇒ Object (readonly)

Returns the value of attribute env.



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# File 'lib/ruby_parser_extras.rb', line 97

def env
  @env
end

#file ⇒ Object

Returns the value of attribute file.



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# File 'lib/ruby_parser_extras.rb', line 96

def file
  @file
end

#in_def ⇒ Object

Returns the value of attribute in_def.



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# File 'lib/ruby_parser_extras.rb', line 96

def in_def
  @in_def
end

#in_single ⇒ Object

Returns the value of attribute in_single.



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# File 'lib/ruby_parser_extras.rb', line 96

def in_single
  @in_single
end

#lexer ⇒ Object

Returns the value of attribute lexer.



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# File 'lib/ruby_parser_extras.rb', line 96

def lexer
  @lexer
end

Instance Method Details

#arg_blk_pass(node1, node2) ⇒ Object

TODO: nuke



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# File 'lib/ruby_parser_extras.rb', line 131

def arg_blk_pass node1, node2 # TODO: nuke
  node1 = s(:arglist, node1) unless [:arglist, :call_args, :array, :args].include? node1.first
  node1 << node2 if node2
  node1
end

#arg_concat(node1, node2) ⇒ Object

TODO: nuke



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# File 'lib/ruby_parser_extras.rb', line 137

def arg_concat node1, node2 # TODO: nuke
  raise "huh" unless node2
  node1 << s(:splat, node2).compact
  node1
end

#argl(x) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 539

def argl x
  x = s(:arglist, x) if x and x[0] == :array
  x
end

#args(args) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 220

def args args
  result = s(:args)

  args.each do |arg|
    case arg
    when Sexp then
      case arg.sexp_type
      when :args, :block, :array, :call_args then # HACK call_args mismatch
        result.concat arg[1..-1]
      when :block_arg then
        result << :"&#{arg.last}"
      when :shadow then
        if Sexp === result.last and result.last.sexp_type == :shadow then
          result.last << arg.last
        else
          result << arg
        end
      when :masgn, :block_pass, :hash then # HACK: remove. prolly call_args
        result << arg
      else
        raise "unhandled: #{arg.sexp_type} in #{args.inspect}"
      end
    when Symbol then
      result << arg
    when ",", "|", ";", "(", ")", nil then
      # ignore
    else
      raise "unhandled: #{arg.inspect} in #{args.inspect}"
    end
  end

  result
end

#array_to_hash(array) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 187

def array_to_hash array
  case array.sexp_type
  when :kwsplat then
    array
  else
    s(:hash, *array[1..-1])
  end
end

#aryset(receiver, index) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 254

def aryset receiver, index
  index ||= []
  s(:attrasgn, receiver, :"[]=", *index[1..-1]).compact # [][1..-1] => nil
end

#assignable(lhs, value = nil) ⇒ Object

Raises:

  • (SyntaxError) 


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# File 'lib/ruby_parser_extras.rb', line 259

def assignable(lhs, value = nil)
  id = lhs.to_sym unless Sexp === lhs
  id = id.to_sym if Sexp === id

  raise "write a test 1" if id.to_s =~ /^(?:self|nil|true|false|__LINE__|__FILE__)$/

  raise SyntaxError, "Can't change the value of #{id}" if
    id.to_s =~ /^(?:self|nil|true|false|__LINE__|__FILE__)$/

  result = case id.to_s
           when /^@@/ then
             asgn = in_def || in_single > 0
             s((asgn ? :cvasgn : :cvdecl), id)
           when /^@/ then
             s(:iasgn, id)
           when /^\$/ then
             s(:gasgn, id)
           when /^[A-Z]/ then
             s(:cdecl, id)
           else
             case self.env[id]
             when :lvar, :dvar, nil then
               s(:lasgn, id)
             else
               raise "wtf? unknown type: #{self.env[id]}"
             end
           end

  self.env[id] ||= :lvar if result.sexp_type == :lasgn

  result << value if value

  return result
end

#backref_assign_error(ref) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 544

def backref_assign_error ref
  # TODO: need a test for this... obviously
  case ref.first
  when :nth_ref then
    raise "write a test 2"
    raise SyntaxError, "Can't set variable %p" % ref.last
  when :back_ref then
    raise "write a test 3"
    raise SyntaxError, "Can't set back reference %p" % ref.last
  else
    raise "Unknown backref type: #{ref.inspect}"
  end
end

#block_append(head, tail) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 294

def block_append(head, tail)
  return head if tail.nil?
  return tail if head.nil?

  line = [head.line, tail.line].compact.min

  head = remove_begin(head)
  head = s(:block, head) unless head.node_type == :block

  head.line = line
  head << tail
end

#block_dup_check(call_or_args, block) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1042

def block_dup_check call_or_args, block
  syntax_error "Both block arg and actual block given." if
    block and call_or_args.block_pass?
end

#block_var(*args) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 164

def block_var *args
  result = self.args args
  result[0] = :masgn
  result
end

#block_var18(ary, splat, block) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 170

def block_var18 ary, splat, block
  ary ||= s(:array)

  if splat then
    splat = splat[1] unless Symbol === splat
    ary << "*#{splat}".to_sym
  end

  ary << "&#{block[1]}".to_sym if block

  if ary.length > 2 or ary.splat then # HACK
    s(:masgn, *ary[1..-1])
  else
    ary.last
  end
end

#call_args(args) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 196

def call_args args
  result = s(:call_args)

  args.each do |arg|
    case arg
    when Sexp then
      case arg.sexp_type
      when :array, :args, :call_args then # HACK? remove array at some point
        result.concat arg[1..-1]
      else
        result << arg
      end
    when Symbol then
      result << arg
    when ",", nil then
      # ignore
    else
      raise "unhandled: #{arg.inspect} in #{args.inspect}"
    end
  end

  result
end

#clean_mlhs(sexp) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 143

def clean_mlhs sexp
  case sexp.sexp_type
  when :masgn then
    if sexp.size == 2 and sexp[1].sexp_type == :array then
      s(:masgn, *sexp[1][1..-1].map { |sub| clean_mlhs sub })
    else
      debug20 5
      sexp
    end
  when :gasgn, :iasgn, :lasgn, :cvasgn then
    if sexp.size == 2 then
      sexp.last
    else
      debug20 7
      sexp # optional value
    end
  else
    raise "unsupported type: #{sexp.inspect}"
  end
end

#cond(node) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 307

def cond node
  return nil if node.nil?
  node = value_expr node

  case node.first
  when :lit then
    if Regexp === node.last then
      return s(:match, node)
    else
      return node
    end
  when :and then
    return s(:and, cond(node[1]), cond(node[2]))
  when :or then
    return s(:or,  cond(node[1]), cond(node[2]))
  when :dot2 then
    label = "flip#{node.hash}"
    env[label] = :lvar
    return s(:flip2, node[1], node[2])
  when :dot3 then
    label = "flip#{node.hash}"
    env[label] = :lvar
    return s(:flip3, node[1], node[2])
  else
    return node
  end
end

#debug20(n, v = nil, r = nil) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 106

def debug20 n, v = nil, r = nil
  raise "not yet #{n} #{v.inspect} => #{r.inspect}" unless $good20[n]
end

#do_parse ⇒ Object

for pure ruby systems only



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# File 'lib/ruby_parser_extras.rb', line 338

def do_parse
  _racc_do_parse_rb(_racc_setup, false)
end

#get_match_node(lhs, rhs) ⇒ Object

TODO: rename to new_match



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# File 'lib/ruby_parser_extras.rb', line 342

def get_match_node lhs, rhs # TODO: rename to new_match
  if lhs then
    case lhs[0]
    when :dregx, :dregx_once then
      return s(:match2, lhs, rhs).line(lhs.line)
    when :lit then
      return s(:match2, lhs, rhs).line(lhs.line) if Regexp === lhs.last
    end
  end

  if rhs then
    case rhs[0]
    when :dregx, :dregx_once then
      return s(:match3, rhs, lhs).line(lhs.line)
    when :lit then
      return s(:match3, rhs, lhs).line(lhs.line) if Regexp === rhs.last
    end
  end

  return new_call(lhs, :"=~", argl(rhs)).line(lhs.line)
end

#gettable(id) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 364

def gettable(id)
  lineno = id.lineno if id.respond_to? :lineno
  id = id.to_sym if String === id

  result = case id.to_s
           when /^@@/ then
             s(:cvar, id)
           when /^@/ then
             s(:ivar, id)
           when /^\$/ then
             s(:gvar, id)
           when /^[A-Z]/ then
             s(:const, id)
           else
             type = env[id]
             if type then
               s(type, id)
             else
               new_call(nil, id)
             end
           end

  result.line lineno if lineno

  raise "identifier #{id.inspect} is not valid" unless result

  result
end

#hack_encoding(str, extra = nil) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 978

def hack_encoding str, extra = nil
  encodings = ENCODING_ORDER.dup
  encodings.unshift(extra) unless extra.nil?

  # terrible, horrible, no good, very bad, last ditch effort.
  encodings.each do |enc|
    begin
      str.force_encoding enc
      if str.valid_encoding? then
        str.encode! Encoding::UTF_8
        break
      end
    rescue Encoding::InvalidByteSequenceError
      # do nothing
    rescue Encoding::UndefinedConversionError
      # do nothing
    end
  end

  # no amount of pain is enough for you.
  raise "Bad encoding. Need a magic encoding comment." unless
    str.encoding.name == "UTF-8"
end

#handle_encoding(str) ⇒ Object

Returns a UTF-8 encoded string after processing BOMs and magic encoding comments.

Holy crap… ok. Here goes:

Ruby’s file handling and encoding support is insane. We need to be able to lex a file. The lexer file is explicitly UTF-8 to make things cleaner. This allows us to deal with extended chars in class and method names. In order to do this, we need to encode all input source files as UTF-8. First, we look for a UTF-8 BOM by looking at the first line while forcing its encoding to ASCII-8BIT. If we find a BOM, we strip it and set the expected encoding to UTF-8. Then, we search for a magic encoding comment. If found, it overrides the BOM. Finally, we force the encoding of the input string to whatever was found, and then encode that to UTF-8 for compatibility with the lexer.



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# File 'lib/ruby_parser_extras.rb', line 947

def handle_encoding str
  str = str.dup
  ruby19 = str.respond_to? :encoding
  encoding = nil

  header = str.lines.first(2)
  header.map! { |s| s.force_encoding "ASCII-8BIT" } if ruby19

  first = header.first || ""
  encoding, str = "utf-8", str[3..-1] if first =~ /\A\xEF\xBB\xBF/

  encoding = $1.strip if header.find { |s|
    s[/^#.*?-\*-.*?coding:\s*([^ ;]+).*?-\*-/, 1] ||
    s[/^#.*(?:en)?coding(?:\s*[:=])\s*([\w-]+)/, 1]
  }

  if encoding then
    if ruby19 then
      encoding.sub!(/utf-8-.+$/, 'utf-8') # HACK for stupid emacs formats
      hack_encoding str, encoding
    else
      warn "Skipping magic encoding comment"
    end
  else
    # nothing specified... ugh. try to encode as utf-8
    hack_encoding str if ruby19
  end

  str
end

#initialize(options = {}) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 404

def initialize(options = {})
  super()

  v = self.class.name[/1[89]|20/]

  self.lexer = RubyLexer.new v && v.to_i
  self.lexer.parser = self

  @env = RubyParserStuff::Environment.new
  @comments = []

  @canonicalize_conditions = true

  self.reset
end

#list_append(list, item) ⇒ Object

TODO: nuke me sigh



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# File 'lib/ruby_parser_extras.rb', line 420

def list_append list, item # TODO: nuke me *sigh*
  return s(:array, item) unless list
  list = s(:array, list) unless Sexp === list && list.first == :array
  list << item
end

#list_prepend(item, list) ⇒ Object

TODO: nuke me sigh



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# File 'lib/ruby_parser_extras.rb', line 426

def list_prepend item, list # TODO: nuke me *sigh*
  list = s(:array, list) unless Sexp === list && list[0] == :array
  list.insert 1, item
  list
end

#literal_concat(head, tail) ⇒ Object

TODO: ugh. rewrite



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# File 'lib/ruby_parser_extras.rb', line 432

def literal_concat head, tail # TODO: ugh. rewrite
  return tail unless head
  return head unless tail

  htype, ttype = head[0], tail[0]

  head = s(:dstr, '', head) if htype == :evstr

  case ttype
  when :str then
    if htype == :str
      head[-1] << tail[-1]
    elsif htype == :dstr and head.size == 2 then
      head[-1] << tail[-1]
    else
      head << tail
    end
  when :dstr then
    if htype == :str then
      lineno = head.line
      tail[1] = head[-1] + tail[1]
      head = tail
      head.line = lineno
    else
      tail[0] = :array
      tail[1] = s(:str, tail[1])
      tail.delete_at 1 if tail[1] == s(:str, '')

      head.push(*tail[1..-1])
    end
  when :evstr then
    head[0] = :dstr if htype == :str
    if head.size == 2 and tail.size > 1 and tail[1][0] == :str then
      head[-1] << tail[1][-1]
      head[0] = :str if head.size == 2 # HACK ?
    else
      head.push(tail)
    end
  else
    x = [head, tail]
    raise "unknown type: #{x.inspect}"
  end

  return head
end

#logop(type, left, right) ⇒ Object

TODO: rename logical_op



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# File 'lib/ruby_parser_extras.rb', line 478

def logop(type, left, right) # TODO: rename logical_op
  left = value_expr left

  if left and left[0] == type and not left.paren then
    node, second = left, nil

    while (second = node[2]) && second[0] == type and not second.paren do
      node = second
    end

    node[2] = s(type, second, right)

    return left
  end

  return s(type, left, right)
end

#new_aref(val) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 496

def new_aref val
  val[2] ||= s(:arglist)
  val[2][0] = :arglist if val[2][0] == :array # REFACTOR
  if val[0].node_type == :self then
    result = new_call nil, :"[]", val[2]
  else
    result = new_call val[0], :"[]", val[2]
  end
  result
end

#new_body(val) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 507

def new_body val
  body, resbody, elsebody, ensurebody = val

  result = body

  if resbody then
    result = s(:rescue)
    result << body if body

    res = resbody

    while res do
      result << res
      res = res.resbody(true)
    end

    result << elsebody if elsebody

    result.line = (body || resbody).line
  end

  if elsebody and not resbody then
    warning("else without rescue is useless")
    result = s(:begin, result) if result
    result = block_append(result, elsebody)
  end

  result = s(:ensure, result, ensurebody).compact if ensurebody

  result
end

#new_call(recv, meth, args = nil) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 558

def new_call recv, meth, args = nil
  result = s(:call, recv, meth)

  # TODO: need a test with f(&b) to produce block_pass
  # TODO: need a test with f(&b) { } to produce warning

  if args
    if [:arglist, :args, :array, :call_args].include? args.first
      result.concat args.sexp_body
    else
      result << args
    end
  end

  line = result.grep(Sexp).map(&:line).compact.min
  result.line = line if line

  result
end

#new_case(expr, body, line) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 578

def new_case expr, body, line
  result = s(:case, expr)

  while body and body.node_type == :when
    result << body
    body = body.delete_at 3
  end

  result[2..-1].each do |node|
    block = node.block(:delete)
    node.concat block[1..-1] if block
  end

  # else
  body = nil if body == s(:block)
  result << body

  result.line = line
  result
end

#new_class(val) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 599

def new_class val
  line, path, superclass, body = val[1], val[2], val[3], val[5]

  result = s(:class, path, superclass)

  if body then
    if body.first == :block then
      result.push(*body[1..-1])
    else
      result.push body
    end
  end

  result.line = line
  result.comments = self.comments.pop
  result
end

#new_compstmt(val) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 617

def new_compstmt val
  result = void_stmts(val.grep(Sexp)[0])
  result = remove_begin(result) if result
  result
end

#new_defn(val) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 623

def new_defn val
  (_, line), name, _, args, body, * = val
  body ||= s(:nil)

  result = s(:defn, name.to_sym, args)

  if body then
    if body.first == :block then
      result.push(*body[1..-1])
    else
      result.push body
    end
  end

  args.line line
  result.line = line
  result.comments = self.comments.pop

  result
end

#new_defs(val) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 644

def new_defs val
  recv, name, args, body = val[1], val[4], val[6], val[7]

  result = s(:defs, recv, name.to_sym, args)

  if body then
    if body.first == :block then
      result.push(*body[1..-1])
    else
      result.push body
    end
  end

  result.line = recv.line
  result.comments = self.comments.pop
  result
end

#new_for(expr, var, body) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 662

def new_for expr, var, body
  result = s(:for, expr, var).line(var.line)
  result << body if body
  result
end

#new_if(c, t, f) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 668

def new_if c, t, f
  l = [c.line, t && t.line, f && f.line].compact.min
  c = cond c
  c, t, f = c.last, f, t if c[0] == :not and canonicalize_conditions
  s(:if, c, t, f).line(l)
end

#new_iter(call, args, body) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 675

def new_iter call, args, body
  body ||= nil

  args ||= s(:args)
  args = s(:args, args) if Symbol === args

  result = s(:iter)
  result << call if call
  result << args
  result << body if body

  args[0] = :args unless args == 0

  result
end

#new_masgn(lhs, rhs, wrap = false) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 691

def new_masgn lhs, rhs, wrap = false
  rhs = value_expr(rhs)
  rhs = lhs[1] ? s(:to_ary, rhs) : s(:array, rhs) if wrap

  lhs.delete_at 1 if lhs[1].nil?
  lhs << rhs

  lhs
end

#new_module(val) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 701

def new_module val
  line, path, body = val[1], val[2], val[4]

  result = s(:module, path)

  if body then # REFACTOR?
    if body.first == :block then
      result.push(*body[1..-1])
    else
      result.push body
    end
  end

  result.line = line
  result.comments = self.comments.pop
  result
end

#new_op_asgn(val) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 719

def new_op_asgn val
  lhs, asgn_op, arg = val[0], val[1].to_sym, val[2]
  name = lhs.value
  arg = remove_begin(arg)
  result = case asgn_op # REFACTOR
           when :"||" then
             lhs << arg
             s(:op_asgn_or, self.gettable(name), lhs)
           when :"&&" then
             lhs << arg
             s(:op_asgn_and, self.gettable(name), lhs)
           else
             # TODO: why [2] ?
             lhs[2] = new_call(self.gettable(name), asgn_op, argl(arg))
             lhs
           end
  result.line = lhs.line
  result
end

#new_regexp(val) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 739

def new_regexp val
  node = val[1] || s(:str, '')
  options = val[2]

  o, k = 0, nil
  options.split(//).uniq.each do |c| # FIX: this has a better home
    v = {
      'x' => Regexp::EXTENDED,
      'i' => Regexp::IGNORECASE,
      'm' => Regexp::MULTILINE,
      'o' => Regexp::ONCE,
      'n' => Regexp::ENC_NONE,
      'e' => Regexp::ENC_EUC,
      's' => Regexp::ENC_SJIS,
      'u' => Regexp::ENC_UTF8,
    }[c]
    raise "unknown regexp option: #{c}" unless v
    o += v

    # encoding options are ignored on 1.9+
    k = c if c =~ /[esu]/ if RUBY_VERSION < "1.9"
  end

  case node[0]
  when :str then
    node[0] = :lit
    node[1] = if k then
                Regexp.new(node[1], o, k)
              else
                begin
                  Regexp.new(node[1], o)
                rescue RegexpError => e
                  warn "WA\RNING: #{e.message} for #{node[1].inspect} #{options.inspect}"
                  begin
                    warn "WA\RNING: trying to recover with ENC_UTF8"
                    Regexp.new(node[1], Regexp::ENC_UTF8)
                  rescue RegexpError => e
                    warn "WA\RNING: trying to recover with ENC_NONE"
                    Regexp.new(node[1], Regexp::ENC_NONE)
                  end
                end
              end
  when :dstr then
    if options =~ /o/ then
      node[0] = :dregx_once
    else
      node[0] = :dregx
    end
    node << o if o and o != 0
  else
    node = s(:dregx, '', node);
    node[0] = :dregx_once if options =~ /o/
    node << o if o and o != 0
  end

  node
end

#new_resbody(cond, body) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 797

def new_resbody cond, body
  if body && body.first == :block then
    body.shift # remove block and splat it in directly
  else
    body = [body]
  end
  s(:resbody, cond, *body)
end

#new_sclass(val) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 806

def new_sclass val
  recv, in_def, in_single, body = val[3], val[4], val[6], val[7]

  result = s(:sclass, recv)

  if body then
    if body.first == :block then
      result.push(*body[1..-1])
    else
      result.push body
    end
  end

  result.line = val[2]
  self.in_def = in_def
  self.in_single = in_single
  result
end

#new_super(args) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 825

def new_super args
  if args && args.node_type == :block_pass then
    s(:super, args)
  else
    args ||= s(:arglist)
    s(:super, *args[1..-1])
  end
end

#new_undef(n, m = nil) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 834

def new_undef n, m = nil
  if m then
    block_append(n, s(:undef, m))
  else
    s(:undef, n)
  end
end

#new_until(block, expr, pre) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 842

def new_until block, expr, pre
  new_until_or_while :until, block, expr, pre
end

#new_until_or_while(type, block, expr, pre) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 846

def new_until_or_while type, block, expr, pre
  other = type == :until ? :while : :until
  line = [block && block.line, expr.line].compact.min
  block, pre = block.last, false if block && block[0] == :begin

  expr = cond expr

  result = unless expr.first == :not and canonicalize_conditions then
             s(type,  expr,      block, pre)
           else
             s(other, expr.last, block, pre)
           end

  result.line = line
  result
end

#new_when(cond, body) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 863

def new_when cond, body
  s(:when, cond, body)
end

#new_while(block, expr, pre) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 867

def new_while block, expr, pre
  new_until_or_while :while, block, expr, pre
end

#new_xstring(str) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 871

def new_xstring str
  if str then
    case str[0]
    when :str
      str[0] = :xstr
    when :dstr
      str[0] = :dxstr
    else
      str = s(:dxstr, '', str)
    end
    str
  else
    s(:xstr, '')
  end
end

#new_yield(args = nil) ⇒ Object

Raises:

  • (SyntaxError) 


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# File 'lib/ruby_parser_extras.rb', line 887

def new_yield args = nil
  # TODO: raise args.inspect unless [:arglist].include? args.first # HACK
  raise "write a test 4" if args && args.node_type == :block_pass
  raise SyntaxError, "Block argument should not be given." if
    args && args.node_type == :block_pass

  args ||= s(:arglist)

  args[0] = :arglist if [:call_args, :array].include?(args[0])
  args = s(:arglist, args) unless args.first == :arglist

  return s(:yield, *args[1..-1])
end

#next_token ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 901

def next_token
  token = self.lexer.next_token

  if token and token.first != RubyLexer::EOF then
    return token
  else
    return [false, '$end']
  end
end

#node_assign(lhs, rhs) ⇒ Object

TODO: rename new_assign



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# File 'lib/ruby_parser_extras.rb', line 911

def node_assign(lhs, rhs) # TODO: rename new_assign
  return nil unless lhs

  rhs = value_expr rhs

  case lhs[0]
  when :lasgn, :iasgn, :cdecl, :cvdecl, :gasgn, :cvasgn, :attrasgn then
    lhs << rhs
  when :const then
    lhs[0] = :cdecl
    lhs << rhs
  else
    raise "unknown lhs #{lhs.inspect} w/ #{rhs.inspect}"
  end

  lhs
end

#on_error(et, ev, values) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1094

def on_error(et, ev, values)
  super
rescue Racc::ParseError => e
  # I don't like how the exception obscures the error message
  e.message.replace "%s:%p :: %s" % [self.file, lexer.lineno, e.message.strip]
  warn e.message if $DEBUG
  raise
end

#process(str, file = "(string)", time = 10) ⇒ Object Also known as: parse

Parse str at path file and return a sexp. Raises Timeout::Error if it runs for more than time seconds.



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# File 'lib/ruby_parser_extras.rb', line 1006

def process(str, file = "(string)", time = 10)
  Timeout.timeout time do
    raise "bad val: #{str.inspect}" unless String === str

    str = handle_encoding str

    self.file = file.dup

    @yydebug = ENV.has_key? 'DEBUG'

    # HACK -- need to get tests passing more than have graceful code
    self.lexer.ss = RPStringScanner.new str

    do_parse
  end
end

#remove_begin(node) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1025

def remove_begin node
  oldnode = node
  if node and :begin == node[0] and node.size == 2 then
    node = node[-1]
    node.line = oldnode.line
  end
  node
end

#reset ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1034

def reset
  lexer.reset
  self.in_def = false
  self.in_single = 0
  self.env.reset
  self.comments.clear
end

#ret_args(node) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1047

def ret_args node
  if node then
    raise "write a test 5" if node[0] == :block_pass

    raise SyntaxError, "block argument should not be given" if
      node[0] == :block_pass

    node[0] = :array if node[0] == :call_args
    node = node.last if node[0] == :array && node.size == 2

    # HACK matz wraps ONE of the FOUR splats in a newline to
    # distinguish. I use paren for now. ugh
    node = s(:svalue, node) if node[0] == :splat and not node.paren
    node[0] = :svalue if node[0] == :arglist && node[1][0] == :splat
  end

  node
end

#s(*args) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1066

def s(*args)
  result = Sexp.new(*args)
  result.line ||= lexer.lineno if lexer.ss          # otherwise...
  result.file = self.file
  result
end

#syntax_error(msg) ⇒ Object Also known as: yyerror

Raises:



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# File 'lib/ruby_parser_extras.rb', line 127

def syntax_error msg
  raise RubyParser::SyntaxError, msg
end

#value_expr(oldnode) ⇒ Object

HACK



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# File 'lib/ruby_parser_extras.rb', line 1073

def value_expr oldnode # HACK
  node = remove_begin oldnode
  node.line = oldnode.line if oldnode
  node[2] = value_expr(node[2]) if node and node[0] == :if
  node
end

#void_stmts(node) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1080

def void_stmts node
  return nil unless node
  return node unless node[0] == :block

  node[1..-1] = node[1..-1].map { |n| remove_begin(n) }
  node
end

#warning(s) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1088

def warning s
  # do nothing for now
end