RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-27 13:27:35 +00:00
Code Issues Activity Actions

AK+Everywhere: Make StdLibExtras templates less wrapper-y

Browse source 
This commit makes the user-facing StdLibExtras templates and utilities
arguably more nice-looking by removing the need to reach into the
wrapper structs generated by them to get the value/type needed.
The C++ standard library had to invent `_v` and `_t` variants (likely
because of backwards compat), but we don't need to cater to any codebase
except our own, so might as well have good things for free. :^)
This commit is contained in:
AnotherTest 2021-04-10 18:29:06 +04:30 • committed by Andreas Kling
parent d8d16dea95
commit a6e4482080
41 changed files with 650 additions and 662 deletions
Download patch file Download diff file Expand all files Collapse all files

14
Userland/Libraries/LibWeb/Bindings/ExceptionOrUtils.h
View file

@ -34,12 +34,10 @@
namespace Web::Bindings {
template<typename>
struct IsExceptionOr : AK::FalseType {
};
constexpr bool IsExceptionOr = false;
template<typename T>
struct IsExceptionOr<DOM::ExceptionOr<T>> : AK::TrueType {
};
constexpr bool IsExceptionOr<DOM::ExceptionOr<T>> = true;
template<typename T>
ALWAYS_INLINE bool throw_dom_exception(JS::VM& vm, JS::GlobalObject& global_object, DOM::ExceptionOr<T>& result)
@ -51,17 +49,17 @@ ALWAYS_INLINE bool throw_dom_exception(JS::VM& vm, JS::GlobalObject& global_obje
return false;
}
template<typename F, typename T = decltype(declval<F>()()), typename Ret = typename Conditional<!IsExceptionOr<T>::value && !IsVoid<T>::value, T, JS::Value>::Type>
template<typename F, typename T = decltype(declval<F>()()), typename Ret = Conditional<!IsExceptionOr<T> && !IsVoid<T>, T, JS::Value>>
Ret throw_dom_exception_if_needed(auto&& vm, auto&& global_object, F&& fn)
{
if constexpr (IsExceptionOr<T>::value) {
if constexpr (IsExceptionOr<T>) {
auto&& result = fn();
if (throw_dom_exception(vm, global_object, result))
return JS::Value();
if constexpr (requires(T v) { v.value(); })
return result.value();
return JS::Value();
} else if constexpr (IsVoid<T>::value) {
} else if constexpr (IsVoid<T>) {
fn();
return JS::js_undefined();
} else {
@ -72,7 +70,7 @@ Ret throw_dom_exception_if_needed(auto&& vm, auto&& global_object, F&& fn)
template<typename T>
bool should_return_empty(T&& value)
{
if constexpr (IsSame<JS::Value, T>::value)
if constexpr (IsSame<JS::Value, T>)
return value.is_empty();
return false;
}