Class: RLTK::CG::StructType

Inherits:
AggregateType show all
Defined in:
lib/rltk/cg/type.rb

Overview

A type for representing an arbitrary collection of types.

Instance Attribute Summary

Attributes included from BindingClass

#ptr

Instance Method Summary collapse

Methods inherited from Type

#allignment, #context, #dump, from_ptr, #hash, #kind, #size, #to_s

Methods included from BindingClass

#==

Constructor Details

#initialize(overloaded, name = nil, packed = false, context = nil) ⇒ StructType

Create a new struct type.



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# File 'lib/rltk/cg/type.rb', line 408

def initialize(overloaded, name = nil, packed = false, context = nil)
  @ptr =
  case overloaded
  when FFI::Pointer
    overloaded
  else
    # Check the types of the elements of the overloaded parameter.

    @element_types = check_cg_array_type(overloaded, Type, 'overloaded')

    el_types_ptr = FFI::MemoryPointer.new(:pointer, @element_types.length)
    el_types_ptr.write_array_of_pointer(@element_types)

    if name
      @name = check_type(name, String, 'name')

      Bindings.struct_create_named(Context.global, @name).tap do |ptr|
        Bindings.struct_set_body(ptr, el_types_ptr, @element_types.length, packed.to_i) unless @element_types.empty?
      end

    elsif context
      check_type(context, Context, 'context')

      Bindings.struct_type_in_context(context, el_types_ptr, @element_types.length, is_packed.to_i)

    else
      Bindings.struct_type(el_types_ptr, @element_types.length, packed.to_i)
    end
  end
end

Instance Method Details

#element_types ⇒ Array<Type> 



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# File 'lib/rltk/cg/type.rb', line 439

def element_types
  @element_types ||=
  begin
    num_elements = Bindings.count_struct_element_types(@ptr)

    ret_ptr = FFI::MemoryPointer.new(:pointer)
    Bindings.get_struct_element_types(@ptr, ret_ptr)

    types_ptr = ret_ptr.get_pointer(0)

    types_ptr.get_array_of_pointer(0, num_elements).map { |ptr| Type.from_ptr(ptr) }
  end
end

#element_types=(el_types, packed = false) ⇒ void

This method returns an undefined value.

Set the types in the body of this struct type.



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# File 'lib/rltk/cg/type.rb', line 459

def element_types=(el_types, packed = false)
  @element_types = check_cg_array_type(el_types, Type, 'el_types')

  el_types_ptr = FFI::MemoryPointer.new(:pointer, @element_types.length)
  el_types_ptr.write_array_of_pointer(@element_types)

  Bindings.struct_set_body(@ptr, el_types_ptr, @element_types.length, packed.to_i)
end

#name ⇒ String 



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# File 'lib/rltk/cg/type.rb', line 469

def name
  @name ||= Bindings.get_struct_name(@ptr)
end