This rule is part of MISRA C++:2023.
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Rule 21.6.4 - If a project defines either a sized or unsized version of a global operator delete, then both shall be defined
[expr.delete]
[new.delete.single]
Category: Required
Analysis: Decidable,System
Rationale
Within a delete-expression, the C++ Standard does not always specify if the sized or the unsized version of the deallocation function will
be selected. Therefore, both versions should be provided, and have the same effect, to ensure that the behaviour is well-defined.
Example
The following example is compliant as sized and unsized versions of operator delete are provided:
void operator delete( void * ptr ) noexcept
{
std::free( ptr );
}
void operator delete( void * ptr, std::size_t size ) noexcept
{
delete( ptr );
}
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