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ResultVal: Add more convenience utils for creating and cascading results

master
Yuri Kunde Schlesner 2017-06-05 23:13:58 +07:00
parent e626a520ca
commit 7e5dd46cf4
1 changed files with 19 additions and 0 deletions
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19
src/core/hle/result.h
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@ -415,6 +415,16 @@ ResultVal<T> MakeResult(Args&&... args) {
return ResultVal<T>::WithCode(RESULT_SUCCESS, std::forward<Args>(args)...);
}
/**
* Deducible overload of MakeResult, allowing the template parameter to be ommited if you're just
* copy or move constructing.
*/
template <typename Arg>
ResultVal<std::remove_reference_t<Arg>> MakeResult(Arg&& arg) {
return ResultVal<std::remove_reference_t<Arg>>::WithCode(RESULT_SUCCESS,
std::forward<Arg>(arg));
}
/**
* Check for the success of `source` (which must evaluate to a ResultVal). If it succeeds, unwraps
* the contained value and assigns it to `target`, which can be either an l-value expression or a
@ -426,3 +436,12 @@ ResultVal<T> MakeResult(Args&&... args) {
if (CONCAT2(check_result_L, __LINE__).Failed()) \
return CONCAT2(check_result_L, __LINE__).Code(); \
target = std::move(*CONCAT2(check_result_L, __LINE__))
/**
* Analogous to CASCADE_RESULT, but for a bare ResultCode. The code will be propagated if
* non-success, or discarded otherwise.
*/
#define CASCADE_CODE(source) \
auto CONCAT2(check_result_L, __LINE__) = source; \
if (CONCAT2(check_result_L, __LINE__).IsError()) \
return CONCAT2(check_result_L, __LINE__);