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Contents
module ATP
module Processors
# Removes embedded else nodes and converts them to the equivalent inverse condition
# node at the same level as the parent node
class ElseRemover < Processor
def run(node)
process(node)
end
def on_condition_node(node)
if e = node.find(:else)
n1 = node.remove(e)
if node.type.to_s =~ /if_/
type = node.type.to_s.sub('if_', 'unless_').to_sym
elsif node.type.to_s =~ /unless_/
type = node.type.to_s.sub('unless_', 'if_').to_sym
else
fail "Don't know how to inverse: #{node.type}"
end
n2 = e.updated(type, [n1.to_a[0]] + e.children)
node.updated(:inline, [n1, n2])
else
node.updated(nil, process_all(node.children))
end
end
ATP::Flow::CONDITION_NODE_TYPES.each do |type|
alias_method "on_#{type}", :on_condition_node unless method_defined?("on_#{type}")
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems