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use variadic template

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Signed-off-by: Rosen Penev <rosenp@gmail.com>
This commit is contained in:
Rosen Penev 2023-05-07 00:24:27 -07:00
parent 954153a4ec
commit c319699ac5
1 changed files with 8 additions and 45 deletions
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53
src/enforce.hpp
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@ -28,58 +28,21 @@ namespace Exiv2::Internal {
* type exception_t * type exception_t
* *
* @tparam exception_t Exception type that is thrown, must provide a * @tparam exception_t Exception type that is thrown, must provide a
* constructor that accepts a single argument to which arg1 is forwarded. * constructor that accepts a single argument to which args are forwarded.
*
* @todo once we have C++>=11 use variadic templates and std::forward to remove
* all overloads of enforce
*/ */
template <typename exception_t, typename T> template <typename exception_t, typename... T>
inline void enforce(bool condition, const T& arg1) { constexpr void enforce(bool condition, T&&... args) {
if (!condition) { if (!condition) {
throw exception_t(arg1); throw exception_t(std::forward<T>(args)...);
} }
} }
/*! /*!
* @brief Ensure that condition is true, otherwise throw an Exiv2::Error with * @brief Ensure that condition is true, otherwise throw an Exiv2::Error with
* the given error_code. * the given error_code & arguments.
*/ */
inline void enforce(bool condition, Exiv2::ErrorCode err_code) { template <typename... T>
if (!condition) { constexpr void enforce(bool condition, Exiv2::ErrorCode err_code, T&&... args) {
throw Exiv2::Error(err_code); enforce<Exiv2::Error>(condition, err_code, std::forward<T>(args)...);
}
}
/*!
* @brief Ensure that condition is true, otherwise throw an Exiv2::Error with
* the given error_code & arg1.
*/
template <typename T>
inline void enforce(bool condition, Exiv2::ErrorCode err_code, const T& arg1) {
if (!condition) {
throw Exiv2::Error(err_code, arg1);
}
}
/*!
* @brief Ensure that condition is true, otherwise throw an Exiv2::Error with
* the given error_code, arg1 & arg2.
*/
template <typename T, typename U>
inline void enforce(bool condition, Exiv2::ErrorCode err_code, const T& arg1, const U& arg2) {
if (!condition) {
throw Exiv2::Error(err_code, arg1, arg2);
}
}
/*!
* @brief Ensure that condition is true, otherwise throw an Exiv2::Error with
* the given error_code, arg1, arg2 & arg3.
*/
template <typename T, typename U, typename V>
inline void enforce(bool condition, Exiv2::ErrorCode err_code, const T& arg1, const U& arg2, const V& arg3) {
if (!condition) {
throw Exiv2::Error(err_code, arg1, arg2, arg3);
}
} }
} // namespace Exiv2::Internal } // namespace Exiv2::Internal