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Add support for unless

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ifs without a true branch would crash before
Somewhat more verbose but unified
This commit is contained in:
Torsten Rüger
2019-08-14 22:24:35 +03:00
parent d6c38d15ba
commit 31ae0a9670
7 changed files with 101 additions and 25 deletions
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25
lib/vool/if_statement.rb
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@ -11,36 +11,23 @@ module Vool
end
def to_mom( compiler )
if_false ? full_if(compiler) : simple_if(compiler)
end
def simple_if(compiler)
true_label = Mom::Label.new( self,"true_label_#{object_id.to_s(16)}")
merge_label = Mom::Label.new( self,"merge_label_#{object_id.to_s(16)}")
head = Mom::TruthCheck.new(condition.slot_definition(compiler) , merge_label)
head << true_label
head << if_true.to_mom(compiler)
head << merge_label
end
def full_if(compiler)
true_label = Mom::Label.new( self , "true_label_#{object_id.to_s(16)}")
false_label = Mom::Label.new( self , "false_label_#{object_id.to_s(16)}")
merge_label = Mom::Label.new( self , "merge_label_#{object_id.to_s(16)}")
head = Mom::TruthCheck.new(condition.slot_definition(compiler) , false_label)
head << true_label
head << if_true.to_mom(compiler)
head << Mom::Jump.new(merge_label)
head << if_true.to_mom(compiler) if @if_true
head << Mom::Jump.new(merge_label) if @if_false
head << false_label
head << if_false.to_mom(compiler)
head << merge_label
head << if_false.to_mom(compiler) if @if_false
head << merge_label if @if_false
head
end
def each(&block)
block.call(condition)
@if_true.each(&block)
@if_true.each(&block) if @if_true
@if_false.each(&block) if @if_false
end