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/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
* Use of this file is governed by the BSD 3-clause license that
* can be found in the LICENSE.txt file in the project root.
*/
#include "misc/MurmurHash.h"
#include "atn/DecisionState.h"
#include "atn/PredictionContext.h"
#include "SemanticContext.h"
#include "atn/LexerActionExecutor.h"
#include "support/CPPUtils.h"
#include "atn/LexerATNConfig.h"
using namespace antlr4::atn;
using namespace antlrcpp;
LexerATNConfig::LexerATNConfig(ATNState *state, int alt, Ref<PredictionContext> const& context)
: ATNConfig(state, alt, context, SemanticContext::NONE), _passedThroughNonGreedyDecision(false) {
}
LexerATNConfig::LexerATNConfig(ATNState *state, int alt, Ref<PredictionContext> const& context,
Ref<LexerActionExecutor> const& lexerActionExecutor)
: ATNConfig(state, alt, context, SemanticContext::NONE), _lexerActionExecutor(lexerActionExecutor),
_passedThroughNonGreedyDecision(false) {
}
LexerATNConfig::LexerATNConfig(Ref<LexerATNConfig> const& c, ATNState *state)
: ATNConfig(c, state, c->context, c->semanticContext), _lexerActionExecutor(c->_lexerActionExecutor),
_passedThroughNonGreedyDecision(checkNonGreedyDecision(c, state)) {
}
LexerATNConfig::LexerATNConfig(Ref<LexerATNConfig> const& c, ATNState *state, Ref<LexerActionExecutor> const& lexerActionExecutor)
: ATNConfig(c, state, c->context, c->semanticContext), _lexerActionExecutor(lexerActionExecutor),
_passedThroughNonGreedyDecision(checkNonGreedyDecision(c, state)) {
}
LexerATNConfig::LexerATNConfig(Ref<LexerATNConfig> const& c, ATNState *state, Ref<PredictionContext> const& context)
: ATNConfig(c, state, context, c->semanticContext), _lexerActionExecutor(c->_lexerActionExecutor),
_passedThroughNonGreedyDecision(checkNonGreedyDecision(c, state)) {
}
Ref<LexerActionExecutor> LexerATNConfig::getLexerActionExecutor() const {
return _lexerActionExecutor;
}
bool LexerATNConfig::hasPassedThroughNonGreedyDecision() {
return _passedThroughNonGreedyDecision;
}
size_t LexerATNConfig::hashCode() const {
size_t hashCode = misc::MurmurHash::initialize(7);
hashCode = misc::MurmurHash::update(hashCode, state->stateNumber);
hashCode = misc::MurmurHash::update(hashCode, alt);
hashCode = misc::MurmurHash::update(hashCode, context);
hashCode = misc::MurmurHash::update(hashCode, semanticContext);
hashCode = misc::MurmurHash::update(hashCode, _passedThroughNonGreedyDecision ? 1 : 0);
hashCode = misc::MurmurHash::update(hashCode, _lexerActionExecutor);
hashCode = misc::MurmurHash::finish(hashCode, 6);
return hashCode;
}
bool LexerATNConfig::operator == (const LexerATNConfig& other) const
{
if (this == &other)
return true;
if (_passedThroughNonGreedyDecision != other._passedThroughNonGreedyDecision)
return false;
if (_lexerActionExecutor == nullptr)
return other._lexerActionExecutor == nullptr;
if (*_lexerActionExecutor != *(other._lexerActionExecutor)) {
return false;
}
return ATNConfig::operator == (other);
}
bool LexerATNConfig::checkNonGreedyDecision(Ref<LexerATNConfig> const& source, ATNState *target) {
return source->_passedThroughNonGreedyDecision ||
(is<DecisionState*>(target) && (static_cast<DecisionState*>(target))->nonGreedy);
}
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