| /* |
| * 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. |
| */ |
| |
| /*! |
| * \file token.h |
| * \brief A operator table for parsing. |
| * |
| * Provides symbolic token sequences to map to TVM operators, with a given associativity and arity. |
| */ |
| |
| #ifndef TVM_PARSER_OP_TABLE_H_ |
| #define TVM_PARSER_OP_TABLE_H_ |
| |
| #include <tvm/ir/op.h> |
| #include <tvm/runtime/container.h> |
| #include <tvm/runtime/object.h> |
| |
| #include <fstream> |
| #include <string> |
| #include <unordered_map> |
| #include <vector> |
| |
| #include "./tokenizer.h" |
| |
| namespace tvm { |
| namespace parser { |
| |
| struct Rule { |
| std::vector<TokenType> tokens; |
| int precedence; |
| int arity; |
| tvm::Op op; |
| bool left_assoc; |
| |
| Rule() : tokens(), precedence(0), arity(0), op(tvm::Op()), left_assoc(false) {} |
| |
| Rule(std::vector<TokenType> tokens, tvm::Op op, int precedence, int arity = 2, |
| bool left_assoc = false) |
| : tokens(tokens), precedence(precedence), arity(arity), op(op), left_assoc(left_assoc) {} |
| |
| Rule(const Rule& rule) { |
| this->tokens = rule.tokens; |
| this->op = rule.op; |
| this->precedence = rule.precedence; |
| this->arity = rule.arity; |
| this->left_assoc = rule.left_assoc; |
| } |
| }; |
| |
| struct OperatorTable { |
| std::vector<Rule> rules; |
| std::unordered_map<std::string, Rule> this_is_a_hack; |
| |
| explicit OperatorTable(std::vector<Rule> rules) : rules(rules), this_is_a_hack() { |
| for (auto rule : rules) { |
| std::stringstream key; |
| for (auto token : rule.tokens) { |
| key << ToString(token); |
| } |
| this->this_is_a_hack.insert({key.str(), rule}); |
| } |
| } |
| }; |
| |
| OperatorTable DefaultOpTable() { |
| return OperatorTable( |
| {Rule({TokenType::kStar}, Op::Get("multiply"), 12, 2, true), |
| Rule({TokenType::kDivision}, Op::Get("divide"), 12, 2, true), |
| Rule({TokenType::kPlus}, Op::Get("add"), 10, 2, true), |
| Rule({TokenType::kMinus}, Op::Get("subtract"), 10, 2, true), |
| Rule({TokenType::kLAngle}, Op::Get("less"), 8, 2, true), |
| Rule({TokenType::kLAngle, TokenType::kEqual}, Op::Get("less_equal"), 8, 2, true), |
| Rule({TokenType::kRAngle}, Op::Get("greater"), 8, 2, true), |
| Rule({TokenType::kRAngle, TokenType::kEqual}, Op::Get("greater_equal"), 8, 2, true), |
| Rule({TokenType::kEqual, TokenType::kEqual}, Op::Get("equal"), 7, 2, true), |
| Rule({TokenType::kBang, TokenType::kEqual}, Op::Get("not_equal"), 7, 2, true)}); |
| } |
| |
| } // namespace parser |
| } // namespace tvm |
| #endif // TVM_PARSER_OP_TABLE_H_ |