rubyx/lib/vool/return_statement.rb
Torsten Rüger f87526f86f Renaming Vool exppressions rightly
Class, Method and Lambda (was block) are expressions.
Just making things clearer, especially for the blocks (ahem, lambdas) is matters.
wip
2019-08-19 11:33:12 +03:00

36 lines
1006 B
Ruby

module Vool
class ReturnStatement < Statement
attr_reader :return_value
def initialize(value)
@return_value = value
end
def each(&block)
block.call(self)
@return_value.each(&block)
end
# Since the return is normalized to only allow simple values it is simple.
# To return form a method in mom instructions we only need to do two things:
# - store the given return value, this is a SlotMove
# - activate return sequence (reinstantiate old message and jump to return address)
def to_mom( compiler )
load = Mom::SlotLoad.new( self , [:message , :return_value] ,
@return_value.to_slot(compiler) )
if @return_value.is_a?(CallStatement)
ret = @return_value.to_mom(compiler)
ret << load
else
ret = load
end
ret << Mom::ReturnJump.new(self , compiler.return_label )
end
def to_s(depth = 0)
at_depth(depth , "return #{@return_value.to_s}")
end
end
end