Class: Duby::AST::MacroDefinition

Inherits:
Node
  • Object
show all
Includes:
Named
Defined in:
lib/duby/ast/intrinsics.rb

Instance Attribute Summary collapse

Attributes included from Named

#name

Attributes inherited from Node

#children, #inferred_type, #newline, #parent, #position

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Named

#to_s

Methods inherited from Node

#<<, ===, #[], #_set_parent, child, child_name, #each, #empty?, #expr?, #initialize_copy, #insert, #inspect, #line_number, #log, #precompile, #resolve_if, #resolved!, #resolved?, #simple_name, #temp, #to_s

Constructor Details

#initialize(parent, line_number, name, &block) ⇒ MacroDefinition

Returns a new instance of MacroDefinition.



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# File 'lib/duby/ast/intrinsics.rb', line 18

def initialize(parent, line_number, name, &block)
  super(parent, line_number, &block)
  @name = name
end

Instance Attribute Details

#proxy ⇒ Object

Returns the value of attribute proxy.



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# File 'lib/duby/ast/intrinsics.rb', line 11

def proxy
  @proxy
end

Class Method Details

.new(*args, &block) ⇒ Object 



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# File 'lib/duby/ast/intrinsics.rb', line 13

def self.new(*args, &block)
  real_node = super
  real_node.proxy = NodeProxy.new(real_node)
end

Instance Method Details

#annotate(type, name) ⇒ Object 



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# File 'lib/duby/ast/intrinsics.rb', line 81

def annotate(type, name)
  node = type.unmeta.node
  if node
    extension = node.annotation('duby.anno.Extensions')
    extension ||= begin
      node.annotations << Annotation.new(
          nil, nil, BiteScript::ASM::Type.getObjectType('duby/anno/Extensions'))
      node.annotations[-1].runtime = false
      node.annotations[-1]
    end
    extension['macros'] ||= []
    macro = Annotation.new(nil, nil,
                           BiteScript::ASM::Type.getObjectType('duby/anno/Macro'))
    macro['name'] = name
    macro['signature'] = BiteScript::Signature.signature(*signature)
    extension['macros'] << macro
  else
    puts "Warning: No ClassDefinition for #{type.name}. Macros can't be loaded from disk."
  end
end

#argument_types ⇒ Object 



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# File 'lib/duby/ast/intrinsics.rb', line 49

def argument_types
  arguments.map do |arg|
    if arg.kind_of?(BlockArgument)
      TypeReference::BlockType
    else
      # TODO support typed args. Also there should be a way
      # to accept any AST node.
      Duby::JVM::Types::Object
    end
  end
end

#build_and_load_extension(parent, name, state) ⇒ Object 



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# File 'lib/duby/ast/intrinsics.rb', line 69

def build_and_load_extension(parent, name, state)
  transformer = Duby::Transform::Transformer.new(state)
  ast = build_ast(name, parent, transformer)
  puts ast.inspect if state.verbose
  classes = compile_ast(name, ast, transformer)
  loader = DubyClassLoader.new(
      JRuby.runtime.jruby_class_loader, classes)
  klass = loader.loadClass(name, true)
  annotate(parent, name)
  klass
end

#build_ast(name, parent, transformer) ⇒ Object 



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# File 'lib/duby/ast/intrinsics.rb', line 123

def build_ast(name, parent, transformer)
  # TODO should use a new type factory too.
  ast = Duby::AST.parse_ruby("import duby.lang.compiler.Node")
  ast = transformer.transform(ast, nil)

  # Start building the extension class
  extension = transformer.define_class(position, name)
  #extension.superclass = Duby::AST.type('duby.lang.compiler.Macro')
  extension.interfaces = [Duby::AST.type('duby.lang.compiler.Macro')]

  # The constructor just saves the state
  extension.define_constructor(
      position,
      ['duby', Duby::AST.type('duby.lang.compiler.Compiler')],
      ['call', Duby::AST.type('duby.lang.compiler.Call')]) do |c|
    transformer.eval("@duby = duby;@call = call", '-', c, 'duby', 'call')
  end

  node_type = Duby::AST.type('duby.lang.compiler.Node')

  # expand() parses the arguments out of call and then passes them off to
  # _expand
  expand = extension.define_method(
      position, 'expand', node_type)
  args = []
  arguments.each_with_index do |arg, i|
    # TODO optional args
    args << if arg.kind_of?(BlockArgument)
      "@call.block"
    else
      "Node(args.get(#{i}))"
    end
  end
  expand.body = transformer.eval(<<-end)
    args = @call.arguments
    _expand(#{args.join(', ')})
  end
  actual_args = arguments.map do |arg|
    [arg.name, node_type, arg.position]
  end
  m = extension.define_method(position, '_expand', node_type, *actual_args)
  m.body = self.body
  ast
end

#compile_ast(name, ast, transformer) ⇒ Object 



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# File 'lib/duby/ast/intrinsics.rb', line 102

def compile_ast(name, ast, transformer)
  filename = name.gsub(".", "/")
  typer = Duby::Typer::JVM.new(filename, transformer)
  typer.infer(ast)
  typer.resolve(true)
  compiler = Duby::Compiler::JVM.new(filename)
  ast.compile(compiler, false)
  class_map = {}
  compiler.generate do |outfile, builder|
    outfile = "#{transformer.destination}#{outfile}"
    FileUtils.mkdir_p(File.dirname(outfile))
    File.open(outfile, 'w') do |f|
      bytes = builder.generate
      name = builder.class_name.gsub(/\//, '.')
      class_map[name] = bytes
      f.write(bytes)
    end
  end
  class_map
end

#infer(typer) ⇒ Object 



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# File 'lib/duby/ast/intrinsics.rb', line 23

def infer(typer)
  resolve_if(typer) do
    self_type = typer.self_type
    extension_name = "%s$%s" % [self_type.name,
                                typer.transformer.tmp("Extension%s")]
    klass = build_and_load_extension(self_type,
                                     extension_name,
                                     typer.transformer.state)

    # restore the self type since we're sharing a type factory
    typer.known_types['self'] = self_type

    arg_types = argument_types
    macro = self_type.add_macro(name, *arg_types) do |duby, call|
      expander = klass.constructors[0].newInstance(duby, call)
      expander.expand
    end
    if arguments[-1].kind_of?(BlockArgument) && arguments[-1].optional?
      arg_types.pop
      typer.self_type.add_method(name, arg_types, macro)
    end
    proxy.__inline__(Noop.new(parent, position))
    proxy.infer(typer)
  end
end

#signature ⇒ Object 



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# File 'lib/duby/ast/intrinsics.rb', line 61

def signature
  args = argument_types
  if args.size > 0 && args[-1].block?
    args[-1] = BiteScript::ASM::Type.getObjectType('duby.lang.compiler.Block')
  end
  [nil] + args
end