Module: Rucc::Node::Conv

Included in:
Rucc::Node
Defined in:
lib/rucc/node/conv.rb

Overview

Type conversion

Instance Method Summary collapse

Instance Method Details

#conv(node) ⇒ Node

Parameters:

Returns:



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# File 'lib/rucc/node/conv.rb', line 9

def conv(node)
  return nil if node.nil?

  ty = node.ty
  case ty.kind
  when Kind::ARRAY
    # C11 6.3.2.1p3: An array of T is converted to a pointer to T.
    return Node.ast_uop(AST::CONV, Type.make_ptr_type(ty.ptr), node)
  when Kind::FUNC
    # C11 6.3.2.1p4: A function designator is converted to a pointer to the function.
    return Node.ast_uop(AST::ADDR, Type.make_ptr_type(ty), node)
  when Kind::SHORT, Kind::CHAR, Kind::BOOL
    # C11 6.3.1.1p2: The integer promotions
    return Node.ast_conv(Type::INT, node)
  when Kind::INT
    if !ty.bitsize.nil? && ty.bitsize > 0
      return Node.ast_conv(Type::INT, node)
    end
  end

  node
end