/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ /*! * Copyright (c) 2018 by Contributors * \file expr_subst.h * \brief Utility functions for substituting expressions. */ #include <tvm/relay/expr_functor.h> #include "./expr_subst.h" namespace tvm { namespace relay { class ExprSubstituter : public ExprMutator { public: explicit ExprSubstituter(std::unordered_map<Expr, Expr, NodeHash, NodeEqual> subst_map) : subst_map_(subst_map) {} Expr VisitExpr(const Expr& expr) final { auto it = subst_map_.find(expr); if (it != subst_map_.end()) { return ExprMutator::VisitExpr((*it).second); } return ExprMutator::VisitExpr(expr); } private: tvm::Map<Expr, Expr> subst_map_; }; Expr ExprSubst(const Expr& expr, std::unordered_map<Expr, Expr, NodeHash, NodeEqual> subst_map) { return ExprSubstituter(std::move(subst_map)).Mutate(expr); } } // namespace relay } // namespace tvm