58 lines
2.6 KiB
C++
58 lines
2.6 KiB
C++
// 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 "antlr4-common.h"
|
|
|
|
#if ANTLR4CPP_USING_ABSEIL
|
|
#include "absl/container/flat_hash_set.h"
|
|
#else
|
|
#include <unordered_set>
|
|
#endif
|
|
|
|
// By default ANTLRv4 uses containers provided by the C++ standard library. In most deployments this
|
|
// is fine, however in some using custom containers may be preferred. This header allows that by
|
|
// optionally supporting some alternative implementations and allowing for more easier patching of
|
|
// other alternatives.
|
|
|
|
namespace antlr4 {
|
|
|
|
#if ANTLR4CPP_USING_ABSEIL
|
|
template <typename Key,
|
|
typename Hash = typename absl::flat_hash_set<Key>::hasher,
|
|
typename Equal = typename absl::flat_hash_set<Key>::key_equal,
|
|
typename Allocator = typename absl::flat_hash_set<Key>::allocator_type>
|
|
using FlatHashSet = absl::flat_hash_set<Key, Hash, Equal, Allocator>;
|
|
#else
|
|
template <typename Key,
|
|
typename Hash = std::hash<Key>,
|
|
typename Equal = std::equal_to<Key>,
|
|
typename Allocator = std::allocator<Key>>
|
|
using FlatHashSet = std::unordered_set<Key, Hash, Equal, Allocator>;
|
|
#endif
|
|
|
|
} // namespace antlr4
|