2133895db1
Summary: Identifiers would be printed correctly if they were printed as part of a larger `Expression` (so the visitor did the printing). However, if `PrintObject` was called with an `Identifier *` then it would delegate to the template overload and just print the pointer. Reviewers: mtomic, teon.banek Reviewed By: mtomic Subscribers: mferencevic, pullbot Differential Revision: https://phabricator.memgraph.io/D1802
47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
#include <iostream>
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#include <sstream>
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#include <string>
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#include "query/frontend/ast/ast.hpp"
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#include "query/frontend/ast/cypher_main_visitor.hpp"
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#include "query/frontend/ast/pretty_print.hpp"
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#include "query/frontend/opencypher/parser.hpp"
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std::string AssembleQueryString(const std::string &expression_string) {
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return "return " + expression_string + " as expr";
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}
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query::Query *ParseQuery(const std::string &query_string,
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query::AstStorage *ast_storage) {
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query::ParsingContext context;
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query::frontend::opencypher::Parser parser(query_string);
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query::frontend::CypherMainVisitor visitor(context, ast_storage);
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visitor.visit(parser.tree());
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return visitor.query();
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}
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query::Expression *GetExpression(query::Query *query) {
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auto cypher_query = dynamic_cast<query::CypherQuery *>(query);
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auto ret =
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dynamic_cast<query::Return *>(cypher_query->single_query_->clauses_[0]);
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auto expr = ret->body_.named_expressions[0]->expression_;
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return expr;
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}
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int main() {
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query::AstStorage ast_storage;
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std::ostringstream ss;
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ss << std::cin.rdbuf();
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auto query_string = AssembleQueryString(ss.str());
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auto query = ParseQuery(query_string, &ast_storage);
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auto expr = GetExpression(query);
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query::PrintExpression(expr, &std::cout);
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std::cout << std::endl;
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return 0;
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}
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