43 lines
1.1 KiB
Ruby
43 lines
1.1 KiB
Ruby
require_relative "normalizer"
|
|
|
|
module Vool
|
|
class WhileStatement < Statement
|
|
include Normalizer
|
|
attr_reader :condition , :body , :hoisted
|
|
|
|
def initialize( condition , body , hoisted = nil)
|
|
@hoisted = hoisted
|
|
@condition = condition
|
|
@body = body
|
|
end
|
|
|
|
def normalize
|
|
cond , rest = *normalize_name(@condition)
|
|
WhileStatement.new(cond , @body.normalize , rest)
|
|
end
|
|
|
|
def to_mom( compiler )
|
|
merge_label = Mom::Label.new( "merge_label_#{object_id.to_s(16)}")
|
|
cond_label = Mom::Label.new( "cond_label_#{object_id.to_s(16)}")
|
|
codes = cond_label
|
|
codes << @hoisted.to_mom(compiler) if @hoisted
|
|
codes << Mom::TruthCheck.new(condition.slot_definition(compiler) , merge_label)
|
|
codes << @body.to_mom(compiler)
|
|
codes << Mom::Jump.new(cond_label)
|
|
codes << merge_label
|
|
end
|
|
|
|
def each(&block)
|
|
block.call(self)
|
|
block.call(@condition)
|
|
@hoisted.each(&block) if @hoisted
|
|
@body.each(&block)
|
|
end
|
|
|
|
def to_s(depth = 0)
|
|
at_depth(depth , "while (#{@condition})" , @body.to_s(depth + 1) , "end" )
|
|
end
|
|
|
|
end
|
|
end
|