Method: ATNConfig#initialize

Defined in:
lib/antlr4/atn/ATNConfig.rb

#initialize(state = nil, alt = nil, context = nil, semantic = nil, config = nil) ⇒ ATNConfig

Returns a new instance of ATNConfig.



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# File 'lib/antlr4/atn/ATNConfig.rb', line 16

def initialize(state=nil, alt=nil, context=nil, semantic=nil, config=nil)
    if config  then
        state = config.state if state.nil?
        alt = config.alt if alt.nil?
        context = config.context if context.nil? 
        semantic = config.semanticContext if semantic.nil?
        semantic = SemanticContext.NONE if semantic.nil?
        @reachesIntoOuterContext = config.reachesIntoOuterContext
    else
    # We cannot execute predicates dependent upon local context unless
    # we know for sure we are in the correct context. Because there is
    # no way to do this efficiently, we simply cannot evaluate
    # dependent predicates unless we are in the rule that initially
    # invokes the ATN simulator.
    #
    # closure() tracks the depth of how far we dip into the
    # outer context: depth > 0.  Note that it may not be totally
    # accurate depth since I don't ever decrement. TODO: make it a boolean then
        @reachesIntoOuterContext = 0 
    end

    #if not isinstance(state, ATNState):
    #    pass
    # The ATN state associated with this configuration#/
    @state = state
    # What alt (or lexer rule) is predicted by this configuration#/
    @alt = alt
    # The stack of invoking states leading to the rule/states associated
    #  with this config.  We track only those contexts pushed during
    #  execution of the ATN simulator.
    @context = context
    @semanticContext = semantic
    mk_hashcode 
end