75 lines
1.9 KiB
Ruby
75 lines
1.9 KiB
Ruby
require_relative "normalizer"
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module Vool
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class IfStatement < Statement
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include Normalizer
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attr_reader :condition , :if_true , :if_false
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def initialize( cond , if_true , if_false = nil)
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@condition = cond
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@if_true = if_true
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@if_false = if_false
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simplify_condition
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end
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def normalize
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cond , rest = *normalize_name(@condition)
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fals = @if_false ? @if_false.normalize : nil
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me = IfStatement.new(cond , @if_true.normalize, fals)
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return me unless rest
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rest << me
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end
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def to_mom( method )
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if_true = @if_true.to_mom( method )
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if_false = @if_false ? @if_false.to_mom( method ) : nil
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condition , hoisted = hoist_condition( method )
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cond = Mom::TruthCheck.new(condition.to_mom(method))
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check = Mom::IfStatement.new( cond , if_true , if_false )
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check.hoisted = hoisted.to_mom(method) if hoisted
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check
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end
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def flatten(options = {})
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true_label = Label.new( "true_label_#{object_id}")
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false_label = Label.new( "false_label_#{object_id}")
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merge_label = Label.new( "merge_label_#{object_id}")
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first = condition.flatten( true_label: true_label , false_label: false_label)
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if hoisted
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head = hoisted.flatten
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head.append first
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else
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head = first
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end
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head.append true_label
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head.append if_true.flatten( merge_label: merge_label)
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if( if_false)
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head.append false_label
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head.append if_false.flatten( merge_label: merge_label)
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end
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head.append merge_label
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head
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end
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def each(&block)
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block.call(condition)
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@if_true.each(&block)
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@if_false.each(&block) if @if_false
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end
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def simplify_condition
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return unless @condition.is_a?(ScopeStatement)
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@condition = @condition.first if @condition.single?
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end
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def has_false?
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@if_false != nil
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end
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def has_true?
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@if_true != nil
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end
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end
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end
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