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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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20
Userland/Libraries/LibVideo/DecoderError.h
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@ -77,15 +77,17 @@ private:
DeprecatedString m_description;
};
#define DECODER_TRY(category, expression) \
({ \
auto _result = ((expression)); \
if (_result.is_error()) [[unlikely]] { \
auto _error_string = _result.release_error().string_literal(); \
return DecoderError::from_source_location( \
((category)), _error_string, SourceLocation::current()); \
} \
_result.release_value(); \
#define DECODER_TRY(category, expression) \
({ \
auto _result = ((expression)); \
if (_result.is_error()) [[unlikely]] { \
auto _error_string = _result.release_error().string_literal(); \
return DecoderError::from_source_location( \
((category)), _error_string, SourceLocation::current()); \
} \
static_assert(!IsLvalueReference<decltype(_result.release_value())>, \
"Do not return a reference from a fallible expression"); \
_result.release_value(); \
})
#define DECODER_TRY_ALLOC(expression) DECODER_TRY(DecoderErrorCategory::Memory, expression)