Class: Mirah::Transform::Transformer

Inherits:
Object
  • Object
show all
Defined in:
lib/mirah/transform/transformer.rb

Defined Under Namespace

Classes: JMetaPosition

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(state) ⇒ Transformer

Returns a new instance of Transformer.



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# File 'lib/mirah/transform/transformer.rb', line 13

def initialize(state)
  @errors = []
  @tmp_count = 0
  @annotations = []
  @scopes = []
  @extra_body = nil
  @state = state
  @helper = Mirah::Transform::Helper.new(self)
end

Instance Attribute Details

#errors ⇒ Object (readonly)

Returns the value of attribute errors.



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# File 'lib/mirah/transform/transformer.rb', line 11

def errors
  @errors
end

#filename ⇒ Object

Returns the value of attribute filename.



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# File 'lib/mirah/transform/transformer.rb', line 12

def filename
  @filename
end

#state ⇒ Object (readonly)

Returns the value of attribute state.



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# File 'lib/mirah/transform/transformer.rb', line 11

def state
  @state
end

Instance Method Details

#__ruby_eval(code, arg) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 166

def __ruby_eval(code, arg)
  self.instance_eval(code)
end

#add_annotation(annotation) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 36

def add_annotation(annotation)
  @annotations << annotation
  Mirah::AST::Noop.new(annotation.parent, annotation.position)
end

#annotations ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 31

def annotations
  result, @annotations = @annotations, []
  return result
end

#append_node(node) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 218

def append_node(node)
  @extra_body << node
  node
end

#body(parent = nil) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 238

def body(parent=nil)
  parent ||= @extra_body
  Mirah::AST::Body.new(parent, parent.position)
end

#camelize(name) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 70

def camelize(name)
  name.gsub(/([a-z])([A-Z])/, '\1_\2').downcase
end

#captured?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mirah/transform/transformer.rb', line 104

def captured?(node)
  depth = node.depth
  scope = @scopes[-1]
  while depth > 0
    depth -= 1
    scope = scope.enclosing_scope
  end
  scope.isCaptured(node.index)
end

#cast(type, value) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 183

def cast(type, value)
  if value.kind_of?(String)
    value = Mirah::AST::Local.new(@extra_body, @extra_body.position, value)
  end
  fcall = eval("Foo()")
  fcall.name = type
  fcall.parameters = [value]
  fcall
end

#constant(name, array = false) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 176

def constant(name, array=false)
  node = eval("Foo")
  node.name = name
  node.array = array
  node
end

#define_class(position, name, &block) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 223

def define_class(position, name, &block)
  append_node Mirah::AST::ClassDefinition.new(@extra_body, position, name, &block)
end

#define_closure(position, name, enclosing_type) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 243

def define_closure(position, name, enclosing_type)
  target = self
  parent = @extra_body
  enclosing_type = enclosing_type.unmeta
  if enclosing_type.respond_to?(:node) && enclosing_type.node
    parent = target = enclosing_type.node
  end
  target.append_node(Mirah::AST::ClosureDefinition.new(
      parent, position, name, enclosing_type))
end

#defineClass(name, superclass = nil, interfaces = nil) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 227

def defineClass(name, superclass=nil, interfaces=nil)
  define_class(@extra_body.position, name) do |class_def|
    superclass = Mirah::AST::Constant.new(class_def, class_def.position, superclass)
    superclass.parent = class_def
    if interfaces
      class_def.implements(*interfaces.map {|i|  Mirah::AST::Constant.new(class_def, class_def.position, i)})
    end
    [superclass, body(class_def)]
  end
end

#destination ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 23

def destination
  @state.destination
end

#dump_ast(node, call = nil) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 121

def dump_ast(node, call=nil)
  encoded = nil
  values = Mirah::AST::Unquote.extract_values do
    encoded = Base64.encode64(Marshal.dump(node))
  end
  scope = call.scope.static_scope if call
  result = Mirah::AST::Array.new(nil, node.position)
  if encoded.size < 65535
    result << Mirah::AST::String.new(result, node.position, encoded)
  else
    strings = Mirah::AST::StringConcat.new(result, node.position)
    result << strings
    while encoded.size >= 65535
      chunk = encoded[0, 65535]
      encoded[0, 65535] = ""
      strings << Mirah::AST::String.new(strings, node.position, chunk)
    end
    strings << Mirah::AST::String.new(strings, node.position, encoded)
  end
  values.each do |value|
    if call
      scoped_value = Mirah::AST::ScopedBody.new(result, value.position)
      scoped_value << value
      scoped_value.static_scope = scope
    else
      scoped_value = value
    end
    result << scoped_value
  end
  return result
end

#empty_array(type_node, size_node) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 199

def empty_array(type_node, size_node)
  node = eval('int[0]')
  node.type_node = type_node
  node.size = size_node
  node
end

#eval(src, filename = '-', parent = nil, *vars) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 114

def eval(src, filename='-', parent=nil, *vars)
  node = Mirah::AST.parse_ruby(src, filename)
  mirah_node = transform(node, nil).body
  mirah_node.parent = parent
  mirah_node
end

#expand(fvcall, parent) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 210

def expand(fvcall, parent)
  result = yield self, fvcall, parent
  unless AST::Node === result
    raise Error.new('Invalid macro result', fvcall.position)
  end
  result
end

#find_class(name) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 206

def find_class(name)
  AST.type(nil, name, false, false)
end

#fixnum(value) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 170

def fixnum(value)
  node = eval("1")
  node.literal = value
  node
end

#load_ast(args) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 153

def load_ast(args)
  nodes = args.to_a
  encoded = nodes.shift
  Mirah::AST::Unquote.inject_values(nodes) do
    result = Marshal.load(Base64.decode64(encoded))
    if Mirah::AST::UnquotedValue === result
      result.node
    else
      result
    end
  end
end

#position(node) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 66

def position(node)
  JMetaPosition.new(node.start_position, node.end_position)
end

#string(value) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 193

def string(value)
  node = eval('"Foo"')
  node.literal = value
  node
end

#tmp(format = "__xform_tmp_%d") ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 41

def tmp(format="__xform_tmp_%d")
  format % [@tmp_count += 1]
end

#transform(node, parent) ⇒ Object 



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# File 'lib/mirah/transform/transformer.rb', line 74

def transform(node, parent)
  return nil if node.nil?
  begin
    top = @extra_body.nil?
    if top
      @extra_body = Mirah::AST::Body.new(nil, position(node))
    end
    method = "transform_#{camelize(node[0])}"
    result = @helper.send method, node, parent
    if top
      body = result.body
      if body.kind_of?(Mirah::AST::Body) && @extra_body.empty?
        @extra_body = body
      else
        result.body = @extra_body
        body.parent = @extra_body
        @extra_body.children.insert(0, body)
      end
    end
    return result
  rescue Error => ex
    @errors << ex
    Mirah::AST::ErrorNode.new(parent, ex)
  # rescue Exception => ex
  #   error = Error.new(ex.message, position(node), ex)
  #   @errors << error
  #   Mirah::AST::ErrorNode.new(parent, error)
  end
end

#verbose? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mirah/transform/transformer.rb', line 27

def verbose?
  @state.verbose
end