72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
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/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
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* Use of this file is governed by the BSD 3-clause license that
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* can be found in the LICENSE.txt file in the project root.
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*/
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#include "atn/ATN.h"
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#include "atn/Transition.h"
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#include "misc/IntervalSet.h"
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#include "support/CPPUtils.h"
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#include "atn/ATNState.h"
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using namespace antlr4::atn;
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using namespace antlrcpp;
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ATNState::ATNState() {
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}
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ATNState::~ATNState() {
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for (auto transition : transitions) {
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delete transition;
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}
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}
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const std::vector<std::string> ATNState::serializationNames = {
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"INVALID", "BASIC", "RULE_START", "BLOCK_START",
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"PLUS_BLOCK_START", "STAR_BLOCK_START", "TOKEN_START", "RULE_STOP",
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"BLOCK_END", "STAR_LOOP_BACK", "STAR_LOOP_ENTRY", "PLUS_LOOP_BACK", "LOOP_END"
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};
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size_t ATNState::hashCode() {
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return stateNumber;
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}
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bool ATNState::operator == (const ATNState &other) {
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return stateNumber == other.stateNumber;
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}
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bool ATNState::isNonGreedyExitState() {
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return false;
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}
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std::string ATNState::toString() const {
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return std::to_string(stateNumber);
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}
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void ATNState::addTransition(Transition *e) {
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addTransition(transitions.size(), e);
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}
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void ATNState::addTransition(size_t index, Transition *e) {
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for (Transition *transition : transitions)
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if (transition->target->stateNumber == e->target->stateNumber) {
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delete e;
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return;
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}
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if (transitions.empty()) {
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epsilonOnlyTransitions = e->isEpsilon();
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} else if (epsilonOnlyTransitions != e->isEpsilon()) {
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std::cerr << "ATN state %d has both epsilon and non-epsilon transitions.\n" << stateNumber;
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epsilonOnlyTransitions = false;
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}
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transitions.insert(transitions.begin() + index, e);
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}
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Transition *ATNState::removeTransition(size_t index) {
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transitions.erase(transitions.begin() + index);
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return nullptr;
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}
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