128 lines
3.7 KiB
C++
128 lines
3.7 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Copyright (C) 2014 ScyllaDB
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*
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* Modified by ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "types.hh"
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#include <vector>
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#include <iosfwd>
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#include <boost/functional/hash.hpp>
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namespace cql3 {
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namespace functions {
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/**
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* Base class for our native/hardcoded functions.
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*/
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class abstract_function : public virtual function {
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protected:
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function_name _name;
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std::vector<data_type> _arg_types;
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data_type _return_type;
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abstract_function(function_name name, std::vector<data_type> arg_types, data_type return_type)
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: _name(std::move(name)), _arg_types(std::move(arg_types)), _return_type(std::move(return_type)) {
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}
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public:
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virtual const function_name& name() const override {
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return _name;
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}
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virtual const std::vector<data_type>& arg_types() const override {
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return _arg_types;
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}
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virtual data_type return_type() const {
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return _return_type;
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}
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bool operator==(const abstract_function& x) const {
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return _name == x._name
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&& _arg_types == x._arg_types
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&& _return_type == x._return_type;
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}
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virtual bool uses_function(const sstring& ks_name, const sstring& function_name) override {
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return _name.keyspace == ks_name && _name.name == function_name;
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}
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virtual bool has_reference_to(function& f) override {
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return false;
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}
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virtual void print(std::ostream& os) const override;
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};
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inline
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void
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abstract_function::print(std::ostream& os) const {
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os << _name << " : (";
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for (size_t i = 0; i < _arg_types.size(); ++i) {
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if (i > 0) {
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os << ", ";
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}
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os << _arg_types[i]->name(); // FIXME: asCQL3Type()
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}
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os << ") -> " << _return_type->name(); // FIXME: asCQL3Type()
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}
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}
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}
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namespace std {
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template <>
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struct hash<cql3::functions::abstract_function> {
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size_t operator()(const cql3::functions::abstract_function& f) const {
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using namespace cql3::functions;
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size_t v = 0;
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boost::hash_combine(v, std::hash<function_name>()(f.name()));
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boost::hash_combine(v, boost::hash_value(f.arg_types()));
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// FIXME: type hash
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//boost::hash_combine(v, std::hash<shared_ptr<abstract_type>>()(f.return_type()));
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return v;
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}
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};
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}
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