Initial commit from sysy-main

antlr/antlr4-runtime-4.12.0/runtime/src/dfa/DFAState.cpp

@@ -0,0 +1,59 @@
+/* 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/ATNConfigSet.h"
+#include "atn/SemanticContext.h"
+#include "atn/ATNConfig.h"
+#include "misc/MurmurHash.h"
+
+#include "dfa/DFAState.h"
+
+using namespace antlr4::dfa;
+using namespace antlr4::atn;
+
+std::string DFAState::PredPrediction::toString() const {
+  return std::string("(") + pred->toString() + ", " + std::to_string(alt) + ")";
+}
+
+std::set<size_t> DFAState::getAltSet() const {
+  std::set<size_t> alts;
+  if (configs != nullptr) {
+    for (size_t i = 0; i < configs->size(); i++) {
+      alts.insert(configs->get(i)->alt);
+    }
+  }
+  return alts;
+}
+
+size_t DFAState::hashCode() const {
+  return configs != nullptr ? configs->hashCode() : 0;
+}
+
+bool DFAState::equals(const DFAState &other) const {
+  if (this == std::addressof(other)) {
+    return true;
+  }
+  return configs == other.configs ||
+         (configs != nullptr && other.configs != nullptr && *configs == *other.configs);
+}
+
+std::string DFAState::toString() const {
+  std::stringstream ss;
+  ss << stateNumber;
+  if (configs) {
+    ss << ":" << configs->toString();
+  }
+  if (isAcceptState) {
+    ss << "=>";
+    if (!predicates.empty()) {
+      for (size_t i = 0; i < predicates.size(); i++) {
+        ss << predicates[i].toString();
+      }
+    } else {
+      ss << prediction;
+    }
+  }
+  return ss.str();
+}