Class: ATNState

Inherits:
Object show all
Defined in:
lib/antlr4/atn/ATNState.rb

Constant Summary collapse

INVALID_TYPE =

constants for serialization

0
BASIC = 
1
RULE_START = 
2
BLOCK_START = 
3
PLUS_BLOCK_START = 
4
STAR_BLOCK_START = 
5
TOKEN_START = 
6
RULE_STOP = 
7
BLOCK_END = 
8
STAR_LOOP_BACK = 
9
STAR_LOOP_ENTRY = 
10
PLUS_LOOP_BACK = 
11
LOOP_END = 
12
INVALID_STATE_NUMBER = 
-1

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ATNState

Returns a new instance of ATNState.



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# File 'lib/antlr4/atn/ATNState.rb', line 28

def initialize()
    # Which ATN are we in?
    @atn = nil
    @stateNumber = ATNState::INVALID_STATE_NUMBER
    @stateType = nil
    @ruleIndex = 0 # at runtime, we don't have Rule objects
    @epsilonOnlyTransitions = false
    # Track the transitions emanating from this ATN state.
    @transitions = Array.new
    # Used to cache lookahead during parsing, not used during construction
    @nextTokenWithinRule = nil
    @serializationNames = [
        "INVALID",
        "BASIC",
        "RULE_START",
        "BLOCK_START",
        "PLUS_BLOCK_START",
        "STAR_BLOCK_START",
        "TOKEN_START",
        "RULE_STOP",
        "BLOCK_END",
        "STAR_LOOP_BACK",
        "STAR_LOOP_ENTRY",
        "PLUS_LOOP_BACK",
        "LOOP_END" ]
end

Instance Attribute Details

#atn ⇒ Object

Returns the value of attribute atn.



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# File 'lib/antlr4/atn/ATNState.rb', line 25

def atn
  @atn
end

#epsilonOnlyTransitions ⇒ Object

Returns the value of attribute epsilonOnlyTransitions.



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# File 'lib/antlr4/atn/ATNState.rb', line 26

def epsilonOnlyTransitions
  @epsilonOnlyTransitions
end

#nextTokenWithinRule ⇒ Object

Returns the value of attribute nextTokenWithinRule.



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# File 'lib/antlr4/atn/ATNState.rb', line 26

def nextTokenWithinRule
  @nextTokenWithinRule
end

#ruleIndex ⇒ Object

Returns the value of attribute ruleIndex.



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# File 'lib/antlr4/atn/ATNState.rb', line 25

def ruleIndex
  @ruleIndex
end

#serializationNames ⇒ Object (readonly)

Returns the value of attribute serializationNames.



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# File 'lib/antlr4/atn/ATNState.rb', line 27

def serializationNames
  @serializationNames
end

#stateNumber ⇒ Object

Returns the value of attribute stateNumber.



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# File 'lib/antlr4/atn/ATNState.rb', line 25

def stateNumber
  @stateNumber
end

#stateType ⇒ Object

Returns the value of attribute stateType.



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# File 'lib/antlr4/atn/ATNState.rb', line 25

def stateType
  @stateType
end

#transitions ⇒ Object

Returns the value of attribute transitions.



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# File 'lib/antlr4/atn/ATNState.rb', line 26

def transitions
  @transitions
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/antlr4/atn/ATNState.rb', line 59

def ==(other)
    if other.kind_of? ATNState then
        other and  self.stateNumber==other.stateNumber
    else
        false
    end
end

#addTransition(trans, index = -1)) ⇒ Object 



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# File 'lib/antlr4/atn/ATNState.rb', line 79

def addTransition(trans, index=-1)
    if self.transitions.length==0
        self.epsilonOnlyTransitions = trans.isEpsilon
    elsif self.epsilonOnlyTransitions != trans.isEpsilon
        self.epsilonOnlyTransitions = false
        # TODO System.err.format(Locale.getDefault(), "ATN state %d has both epsilon and non-epsilon transitions.\n", stateNumber);
    end
    if index==-1
        self.transitions.push(trans)
    else
        self.transitions.insert(index, trans)
    end
end

#hash ⇒ Object 



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# File 'lib/antlr4/atn/ATNState.rb', line 55

def hash
    return self.stateNumber
end

#inspect ⇒ Object 



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# File 'lib/antlr4/atn/ATNState.rb', line 76

def inspect
  "<ATNState #{self.stateNumber.to_s} >"
end

#isNonGreedyExitState ⇒ Object 



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# File 'lib/antlr4/atn/ATNState.rb', line 69

def isNonGreedyExitState
    return false
end

#onlyHasEpsilonTransitions ⇒ Object 



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# File 'lib/antlr4/atn/ATNState.rb', line 66

def onlyHasEpsilonTransitions
    self.epsilonOnlyTransitions
end

#to_s ⇒ Object 



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# File 'lib/antlr4/atn/ATNState.rb', line 73

def to_s 
    self.stateNumber.to_s
end