58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
// Copyright 2023 Memgraph Ltd.
|
|
//
|
|
// Use of this software is governed by the Business Source License
|
|
// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
|
|
// License, and you may not use this file except in compliance with the Business Source License.
|
|
//
|
|
// As of the Change Date specified in that file, in accordance with
|
|
// the Business Source License, use of this software will be governed
|
|
// by the Apache License, Version 2.0, included in the file
|
|
// licenses/APL.txt.
|
|
|
|
#include <iostream>
|
|
#include <sstream>
|
|
#include <string>
|
|
|
|
#include "query/frontend/ast/ast.hpp"
|
|
#include "query/frontend/ast/cypher_main_visitor.hpp"
|
|
#include "query/frontend/ast/pretty_print.hpp"
|
|
#include "query/frontend/opencypher/parser.hpp"
|
|
#include "query/parameters.hpp"
|
|
|
|
std::string AssembleQueryString(const std::string &expression_string) {
|
|
return "return " + expression_string + " as expr";
|
|
}
|
|
|
|
memgraph::query::Query *ParseQuery(const std::string &query_string, memgraph::query::AstStorage *ast_storage) {
|
|
memgraph::query::frontend::ParsingContext context;
|
|
memgraph::query::Parameters parameters;
|
|
memgraph::query::frontend::opencypher::Parser parser(query_string);
|
|
memgraph::query::frontend::CypherMainVisitor visitor(context, ast_storage, ¶meters);
|
|
|
|
visitor.visit(parser.tree());
|
|
return visitor.query();
|
|
}
|
|
|
|
memgraph::query::Expression *GetExpression(memgraph::query::Query *query) {
|
|
auto cypher_query = dynamic_cast<memgraph::query::CypherQuery *>(query);
|
|
auto ret = dynamic_cast<memgraph::query::Return *>(cypher_query->single_query_->clauses_[0]);
|
|
auto expr = ret->body_.named_expressions[0]->expression_;
|
|
|
|
return expr;
|
|
}
|
|
|
|
int main() {
|
|
memgraph::query::AstStorage ast_storage;
|
|
std::ostringstream ss;
|
|
ss << std::cin.rdbuf();
|
|
|
|
auto query_string = AssembleQueryString(ss.str());
|
|
auto query = ParseQuery(query_string, &ast_storage);
|
|
auto expr = GetExpression(query);
|
|
|
|
memgraph::query::PrintExpression(expr, &std::cout);
|
|
std::cout << std::endl;
|
|
|
|
return 0;
|
|
}
|