1/*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19
20/*!
21 * \file src/relay/collage/name_supply.h
22 * \brief A source of fresh variable names.
23 */
24
25#ifndef TVM_RELAY_COLLAGE_NAME_SUPPLY_H_
26#define TVM_RELAY_COLLAGE_NAME_SUPPLY_H_
27
28#include <string>
29#include <unordered_map>
30#include <utility>
31
32namespace tvm {
33namespace relay {
34namespace collage {
35
36/*! \brief A supply of fresh names. */
37class NameSupply {
38 public:
39 explicit NameSupply(std::string prefix) : prefix_(std::move(prefix)) {}
40
41 NameSupply MakeSubNameSupply();
42
43 void Reserve(const std::string& existing) { next_free_index_.emplace(existing, 1); }
44
45 std::string Fresh(const std::initializer_list<std::string>& hints);
46
47 private:
48 /*! \brief Prefix for all names. May be empty. */
49 std::string prefix_;
50 /*! \brief Next unused index for variables with given basename. */
51 std::unordered_map<std::string, int> next_free_index_;
52};
53
54} // namespace collage
55} // namespace relay
56} // namespace tvm
57
58#endif // TVM_RELAY_COLLAGE_NAME_SUPPLY_H_
59