example_parser.hpp

// Copyright (C) 2017-2023 Jonathan Müller and cppast contributors
// SPDX-License-Identifier: MIT

#ifndef CPPAST_EXAMPLE_PARSER_HPP_INCLUDED
#define CPPAST_EXAMPLE_PARSER_HPP_INCLUDED

#include <iostream>

#include <cppast/libclang_parser.hpp>

// reads the database directory from the command line argument
// parses all files in that directory
// and invokes the callback for each of them
template <typename Callback>
int example_main(int argc, char* argv[], const cppast::cpp_entity_index& index, Callback cb)
try
{
    if (argc != 2)
    {
        std::cerr << "usage: " << argv[0] << " <compile-commands-json-dir>\n";
        return 1;
    }
    else
    {
        cppast::libclang_compilation_database database(argv[1]); // the compilation database

        // simple_file_parser allows parsing multiple files and stores the results for us
        cppast::simple_file_parser<cppast::libclang_parser> parser(type_safe::ref(index));
        try
        {
            cppast::parse_database(parser, database); // parse all files in the database
        }
        catch (cppast::libclang_error& ex)
        {
            std::cerr << "fatal libclang error: " << ex.what() << '\n';
            return 1;
        }

        if (parser.error())
            // a non-fatal parse error
            // error has been logged to stderr
            return 1;

        for (auto& file : parser.files())
            cb(file);
    }

    return 0;
}
catch (std::exception& ex)
{
    std::cerr << ex.what() << '\n';
    return 1;
}

#endif // CPPAST_EXAMPLE_PARSER_HPP_INCLUDED