RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-06-01 10:08:10 +00:00
Code Issues Activity Actions

LibJS: Add a MUST() macro, like TRY() but for the spec's ! shortcut

Browse source
This commit is contained in:
Linus Groh 2021-10-03 15:09:28 +01:00
parent 8f722302d9
commit 7cd3f7de61
1 changed files with 13 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

13
Userland/Libraries/LibJS/Runtime/Completion.h
View file

@ -26,6 +26,19 @@ namespace JS {
_temporary_result.release_value(); \
})
// MUST() is to the spec's `!` what TRY() is to `?`.
// https://tc39.es/ecma262/#sec-returnifabrupt-shorthands
#define MUST(expression) \
({ \
auto _temporary_result = (expression); \
VERIFY(!_temporary_result.is_error()); \
/* The return value of "! Something()" is commonly */ \
/* ignored, so we assign to a temporary variable here */ \
/* to avoid having to (void) all the things. */ \
auto _temporary_value = _temporary_result.release_value(); \
move(_temporary_value); \
})
// 6.2.3 The Completion Record Specification Type, https://tc39.es/ecma262/#sec-completion-record-specification-type
class [[nodiscard]] Completion {
public: