54 lines
1.2 KiB
Ruby
54 lines
1.2 KiB
Ruby
module Vool
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class IfStatement < Statement
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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 to_mom( method )
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merge = Mom::Noop.new(:merge)
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if_true = add_jump(@if_true.to_mom( method ) , merge)
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if_false = add_jump(@if_false.to_mom( method ) , merge)
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cond = hoist_condition( method )
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check = Mom::TruthCheck.new( cond.pop , if_true , if_false , merge)
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[ *check , if_true , if_false , merge ]
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end
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def hoist_condition( method )
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return [@condition] if @condition.is_a?(Vool::Named)
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local = method.create_tmp
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puts local
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end
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def collect(arr)
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@if_true.collect(arr)
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@if_false.collect(arr)
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super
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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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private
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def add_jump( block , merge)
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block = [block] unless block.is_a?(Array)
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block << Mom::Jump.new(merge)
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block
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end
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end
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end
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