47 lines
1.3 KiB
Ruby
47 lines
1.3 KiB
Ruby
require_relative "normalizer"
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module Ruby
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# The if must have condition and a true branch, the false is optional
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#
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# It maps pretty much one to one to a Vool, except for "hoisting"
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#
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# Ruby may have super complex expressions as the condition, whereas
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# Vool may not. Ie of a Statement list all but the last are hoisted to before
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# the vool if. This is equivalent, just easier to compile later
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#
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# The hoisintg code is in Normalizer, as it is also useed in return and while
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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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end
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def to_vool
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cond , rest = *normalize_name(@condition)
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me = Vool::IfStatement.new(cond.to_vool , @if_true.to_vool, @if_false&.to_vool)
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return me unless rest
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Vool::Statements.new([ rest.to_vool , me])
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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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def to_s(depth = 0)
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parts = ["if(#{@condition})" , @if_true.to_s(depth + 1) ]
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parts += ["else" , @if_false.to_s(depth + 1)] if(@if_false)
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parts << "end"
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at_depth(depth , *parts )
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end
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end
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end
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