add antlr source code and ReadMe

[toc] / antlr4-cpp-runtime-4.9.2-source / runtime / src / atn / PrecedencePredicateTransition.cpp

diff --git a/antlr4-cpp-runtime-4.9.2-source/runtime/src/atn/PrecedencePredicateTransition.cpp b/antlr4-cpp-runtime-4.9.2-source/runtime/src/atn/PrecedencePredicateTransition.cpp
new file mode 100644 (file)
index 0000000..9aedc9d
--- /dev/null
+++ b/antlr4-cpp-runtime-4.9.2-source/runtime/src/atn/PrecedencePredicateTransition.cpp
@@ -0,0 +1,32 @@
+/* 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 "atn/PrecedencePredicateTransition.h"
+
+using namespace antlr4::atn;
+
+PrecedencePredicateTransition::PrecedencePredicateTransition(ATNState *target, int precedence)
+  : AbstractPredicateTransition(target), precedence(precedence) {
+}
+
+Transition::SerializationType PrecedencePredicateTransition::getSerializationType() const {
+  return PRECEDENCE;
+}
+
+bool PrecedencePredicateTransition::isEpsilon() const {
+  return true;
+}
+
+bool PrecedencePredicateTransition::matches(size_t /*symbol*/, size_t /*minVocabSymbol*/, size_t /*maxVocabSymbol*/) const {
+  return false;
+}
+
+Ref<SemanticContext::PrecedencePredicate> PrecedencePredicateTransition::getPredicate() const {
+  return std::make_shared<SemanticContext::PrecedencePredicate>(precedence);
+}
+
+std::string PrecedencePredicateTransition::toString() const {
+  return "PRECEDENCE " + Transition::toString() + " { precedence: " + std::to_string(precedence) + " }";
+}