Class: PatternMatching::MatchExec

Inherits:
Object
  • Object
show all
Defined in:
lib/patternmatching/pattern.rb

Overview

Private class to run pattern matching

Defined Under Namespace

Classes: ExecuteAs, InstanceVariableAccessor

Class Method Summary collapse

Class Method Details

.exec_as(target, patterns, receiver) ⇒ Object 



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# File 'lib/patternmatching/pattern.rb', line 206

def self.exec_as(target, patterns, receiver)
  patterns.each do |tuple|
    pattern = tuple[0]
    action = tuple[1]
    condition = tuple[2]
    source = NodeBuilder.new.instance_eval(&pattern)
    args = {}
    begin
      Collector.walk(source, target, args)
    rescue NotMatched
      next
    end
    executer = ExecuteAs.new(args, receiver)
    next if condition != nil and not executer.instance_eval(&condition)
    return [executer, action]
  end
  nil
end