Class: Mirah::JVM::Types::ArrayType

Inherits:
Type show all
Defined in:
lib/mirah/jvm/types/array_type.rb,
lib/mirah/jvm/types/intrinsics.rb

Constant Summary

Constants inherited from AST::TypeReference

AST::TypeReference::BlockType, AST::TypeReference::ErrorType, AST::TypeReference::NoType, AST::TypeReference::NullType, AST::TypeReference::UnreachableType

Instance Attribute Summary collapse

Attributes inherited from Type

#inner_class

Attributes inherited from AST::TypeReference

#array

Attributes included from AST::Named

#name

Attributes inherited from AST::Node

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

Instance Method Summary collapse

Methods inherited from Type

#abstract?, #add_compiled_macro, #add_enumerable_macros, #add_macro, #add_method, #aload, #array_type, #assignable_from?, #astore, #compatible?, #constructor, #declared_class_methods, #declared_constructors, #declared_instance_methods, #declared_intrinsics, #dynamic?, #expand_each, #field_getter, #field_setter, #full_name, #get_method, #include, #init_value, #inner_class_getter, #inspect, #interface?, #intrinsics, #is_parent, #java_method, #jvm_type, #load, #load_extensions, #log, #meta?, #newarray, #pop, #prefix, #primitive?, #return, #store, #to_source, #unmeta, #void?, #wide?, #wrap_with_scoped_body

Methods included from MethodLookup

#each_is_exact, #each_is_exact_or_subtype_or_convertible, #field_lookup, #find_jls, #find_method, #inner_class, #is_more_specific?, #log, #phase1, #phase2, #phase3, #primitive_convertible?

Methods inherited from AST::TypeReference

#==, #_dump, _load, #block?, #compatible?, #eql?, #error?, #full_name, #hash, #is_parent, #meta?, #narrow, #null?, #primitive?, #to_s, #type_reference, #unmeta, #unreachable?, #void?

Methods included from AST::Named

#string_value, #to_s, #validate_name

Methods inherited from AST::Node

#<<, ===, #[], #[]=, #_dump, _load, #_set_parent, child, child_name, #child_nodes, #each, #empty?, #expr?, #inferred_type!, #initialize_copy, #insert, #inspect, #inspect_children, #line_number, #log, #precompile, #resolve_if, #resolved!, #resolved?, #simple_name, #string_value, #temp, #to_s, #top_level?, #validate_child, #validate_children

Constructor Details

#initialize(component_type) ⇒ ArrayType

Returns a new instance of ArrayType.



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# File 'lib/mirah/jvm/types/array_type.rb', line 7

def initialize(component_type)
  @component_type = component_type
  if @component_type.jvm_type
    #@type = java.lang.reflect.Array.newInstance(@component_type.jvm_type, 0).class
  else
    # FIXME: THIS IS WRONG, but I don't know how to fix it
    #@type = @component_type
  end
  @name = component_type.name
end

Instance Attribute Details

#component_type ⇒ Object (readonly)

Returns the value of attribute component_type.



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# File 'lib/mirah/jvm/types/array_type.rb', line 5

def component_type
  @component_type
end

Instance Method Details

#add_intrinsics ⇒ Object 



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# File 'lib/mirah/jvm/types/intrinsics.rb', line 208

def add_intrinsics
  super
  add_enumerable_macros

  add_method(
      '[]', [Int], component_type) do |compiler, call, expression|
    if expression
      call.target.compile(compiler, true)
      call.parameters[0].compile(compiler, true)
      component_type.aload(compiler.method)
    end
  end

  add_method('[]=',
             [Int, component_type],
             component_type) do |compiler, call, expression|
    call.target.compile(compiler, true)
    convert_args(compiler, call.parameters, [Int, component_type])
    component_type.astore(compiler.method)
    if expression
      call.parameters[1].compile(compiler, true)
    end
  end

  add_method('length', [], Int) do |compiler, call, expression|
    call.target.compile(compiler, true)
    compiler.method.arraylength
  end

  add_macro('each', Mirah::AST.block_type) do |transformer, call|
    Mirah::AST::Loop.new(call.parent,
                        call.position, true, false) do |forloop|
      index = transformer.tmp
      array = transformer.tmp

      init = transformer.eval("#{index} = 0;#{array} = nil")
      array_assignment = init.children[-1]
      array_assignment.value = call.target
      call.target.parent = array_assignment
      forloop.init << init

      var = call.block.args.args[0]
      if var
        forloop.pre << transformer.eval(
            "#{var.name} = #{array}[#{index}]", '', forloop, index, array)
      end
      forloop.post << transformer.eval("#{index} += 1")
      call.block.body.parent = forloop if call.block.body
      [
        Mirah::AST::Condition.new(forloop, call.position) do |c|
          [transformer.eval("#{index} < #{array}.length",
                            '', forloop, index, array)]
        end,
        call.block.body
      ]
    end
  end
end

#array? ⇒ Boolean

Returns:



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# File 'lib/mirah/jvm/types/array_type.rb', line 18

def array?
  true
end

#basic_type ⇒ Object 



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# File 'lib/mirah/jvm/types/array_type.rb', line 30

def basic_type
  component_type.basic_type
end

#inner_class? ⇒ Boolean

Returns:



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# File 'lib/mirah/jvm/types/array_type.rb', line 26

def inner_class?
  basic_type.inner_class?
end

#interfaces ⇒ Object 



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# File 'lib/mirah/jvm/types/array_type.rb', line 50

def interfaces
  []
end

#iterable? ⇒ Boolean

Returns:



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# File 'lib/mirah/jvm/types/array_type.rb', line 22

def iterable?
  true
end

#meta ⇒ Object 



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# File 'lib/mirah/jvm/types/array_type.rb', line 54

def meta
  @meta ||= ArrayMetaType.new(self)
end

#superclass ⇒ Object 



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# File 'lib/mirah/jvm/types/array_type.rb', line 34

def superclass
  if component_type.primitive?
    Object
  elsif component_type.array?
    # fix covariance here for arrays of arrays
    # see #55
    Object
  else
    if component_type == Object
      Object
    else
      component_type.superclass.array_type
    end
  end
end