RGen::Util::PatternMatcher

# File lib/rgen/util/pattern_matcher.rb, line 17
def initialize
  @patterns = {} 
  @insert_mode = false
  @debug = false
end

# File lib/rgen/util/pattern_matcher.rb, line 23
def add_pattern(name, &block)
  raise "a pattern needs at least 2 block parameters: " + 
    "an RGen environment and a model element as connection point"        unless block.arity >= 2
  @patterns[name] = block
end

# File lib/rgen/util/pattern_matcher.rb, line 30
def find_pattern(env, name, *connection_points)
  match = find_pattern_internal(env, name, *connection_points)
end

# File lib/rgen/util/pattern_matcher.rb, line 34
def insert_pattern(env, name, *connection_points)
  @insert_mode = true
  root = evaluate_pattern(name, env, connection_points)
  @insert_mode = false
  root
end

# File lib/rgen/util/pattern_matcher.rb, line 54
def lazy(&block)
  if @insert_mode
    block.call
  else
    Lazy.new(&block)
  end
end

# File lib/rgen/util/pattern_matcher.rb, line 41
def remove_pattern(env, name, *connection_points)
  match = find_pattern_internal(env, name, *connection_points)
  if match
    match.elements.each do |e|
      disconnect_element(e)
      env.delete(e)
    end
    match
  else
    nil
  end
end