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AK+Everywhere: Disallow returning a reference from a fallible expression

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This will silently make a copy. Rather than masking this behavior, let's
explicitly disallow it.
This commit is contained in:
Timothy Flynn 2023-01-13 15:48:09 -05:00 • committed by Tim Flynn
parent 3de75f6436
commit afc0e461e1
11 changed files with 86 additions and 54 deletions
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6
Userland/Libraries/LibJS/Runtime/PromiseCapability.h
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@ -53,6 +53,9 @@ private:
return (capability)->promise(); \
} \
\
static_assert(!IsLvalueReference<decltype(_temporary_try_or_reject_result.release_value())>, \
"Do not return a reference from a fallible expression"); \
\
/* 2. Else if value is a Completion Record, set value to value.[[Value]]. */ \
_temporary_try_or_reject_result.release_value(); \
})
@ -76,6 +79,9 @@ private:
return Value { (capability)->promise() }; \
} \
\
static_assert(!IsLvalueReference<decltype(_temporary_try_or_reject_result.release_value())>, \
"Do not return a reference from a fallible expression"); \
\
/* 2. Else if value is a Completion Record, set value to value.[[Value]]. */ \
_temporary_try_or_reject_result.release_value(); \
})