Function format_key_message

src/project_parser.cpp:35–58

using TomlBasicValue = toml::basic_value<toml::discard_comments, tsl::ordered_map, std::vector>;

static std::string format_key_message(const std::string &message, const toml::key &ky, const TomlBasicValue &value) {
    auto loc = value.location();
    auto line_number_str = std::to_string(loc.line());
    auto line_width = line_number_str.length();
    const auto &line_str = loc.line_str();

    std::ostringstream oss;
    oss << message << "\n";
    oss << " --> " << loc.file_name() << ':' << loc.line() << '\n';

    oss << std::string(line_width + 2, ' ') << "|\n";
    oss << ' ' << line_number_str << " | " << line_str << '\n';

    oss << std::string(line_width + 2, ' ') << '|';
    auto key_start = line_str.substr(0, loc.column() - 1).rfind(ky);
    if (key_start == std::string::npos) {
        key_start = line_str.find(ky);
    }
    if (key_start != std::string::npos) {
        oss << std::string(key_start + 1, ' ') << std::string(ky.length(), '~');
    }

    return oss.str();
}

static void throw_key_error(const std::string &error, const toml::key &ky, const TomlBasicValue &value) {
    throw std::runtime_error(format_key_message("[error] " + error, ky, value));