build(antlr): 引入第三方 ANTLR4 runtime/tool 并接入构建

third_party/antlr4-runtime-4.13.2/runtime/src/atn/PredictionContextCache.h

@@ -0,0 +1,63 @@
+// Copyright 2012-2022 The ANTLR Project
+//
+// Redistribution and use in source and binary forms, with or without modification, are permitted
+// provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this list of conditions
+//    and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list of
+//    conditions and the following disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be used to
+//    endorse or promote products derived from this software without specific prior written
+//    permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
+// WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#pragma once
+
+#include "atn/PredictionContext.h"
+#include "FlatHashSet.h"
+
+namespace antlr4 {
+namespace atn {
+
+  class ANTLR4CPP_PUBLIC PredictionContextCache final {
+  public:
+    PredictionContextCache() = default;
+
+    PredictionContextCache(const PredictionContextCache&) = delete;
+    PredictionContextCache(PredictionContextCache&&) = delete;
+
+    PredictionContextCache& operator=(const PredictionContextCache&) = delete;
+    PredictionContextCache& operator=(PredictionContextCache&&) = delete;
+
+    void put(const Ref<const PredictionContext> &value);
+
+    Ref<const PredictionContext> get(const Ref<const PredictionContext> &value) const;
+
+  private:
+    struct ANTLR4CPP_PUBLIC PredictionContextHasher final {
+      size_t operator()(const Ref<const PredictionContext> &predictionContext) const;
+    };
+
+    struct ANTLR4CPP_PUBLIC PredictionContextComparer final {
+      bool operator()(const Ref<const PredictionContext> &lhs,
+                      const Ref<const PredictionContext> &rhs) const;
+    };
+
+    FlatHashSet<Ref<const PredictionContext>,
+                PredictionContextHasher, PredictionContextComparer> _data;
+  };
+
+}  // namespace atn
+}  // namespace antlr4