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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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14
Kernel/Net/Socket.h
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@ -184,12 +184,14 @@ private:
};
// This is a special variant of TRY() that also updates the socket's SO_ERROR field on error.
#define SOCKET_TRY(expression) \
({ \
auto result = (expression); \
if (result.is_error()) \
return set_so_error(result.release_error()); \
result.release_value(); \
#define SOCKET_TRY(expression) \
({ \
auto result = (expression); \
if (result.is_error()) \
return set_so_error(result.release_error()); \
static_assert(!IsLvalueReference<decltype(result.release_value())>, \
"Do not return a reference from a fallible expression"); \
result.release_value(); \
})
}