Class: ATP::Processors::Flattener

Inherits:
ATP::Processor show all
Defined in:
lib/atp/processors/flattener.rb

Overview

Gives every node their own individual wrapping of condition nodes. No attempt is made to identify or remove duplicate conditions in the wrapping, that will be done later by the RedundantConditionRemover.

Instance Method Summary collapse

Methods inherited from ATP::Processor

#clean_flag, #extract_volatiles, #process, #process_all, #volatile?, #volatile_flags

Instance Method Details

#handler_missing(node) ⇒ Object 



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# File 'lib/atp/processors/flattener.rb', line 42

def handler_missing(node)
  results << wrap_with_current_conditions(node)
end

#on_condition_node(node) ⇒ Object 



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# File 'lib/atp/processors/flattener.rb', line 32

def on_condition_node(node)
  flag, *nodes = *node
  @conditions << node.updated(node.type, [flag])
  process_all(nodes)
  @conditions.pop
end

#on_flow(node) ⇒ Object 



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# File 'lib/atp/processors/flattener.rb', line 14

def on_flow(node)
  process_all(node.children)
end

#on_group(node) ⇒ Object 



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# File 'lib/atp/processors/flattener.rb', line 25

def on_group(node)
  @results << []
  process_all(node.children)
  nodes = @results.pop
  results << node.updated(nil, nodes)
end

#on_volatile(node) ⇒ Object Also known as: on_name, on_id

Handles the top-level flow nodes



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# File 'lib/atp/processors/flattener.rb', line 19

def on_volatile(node)
  results << node
end

#results ⇒ Object 



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# File 'lib/atp/processors/flattener.rb', line 53

def results
  @results.last
end

#run(node) ⇒ Object 



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# File 'lib/atp/processors/flattener.rb', line 7

def run(node)
  @results = [[]]
  @conditions = []
  process(node)
  node.updated(:flow, results)
end

#wrap_with_current_conditions(node) ⇒ Object 



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# File 'lib/atp/processors/flattener.rb', line 46

def wrap_with_current_conditions(node)
  @conditions.reverse_each do |condition|
    node = condition.updated(nil, condition.children + [node])
  end
  node
end