[diff.cpp14.except]

# Annex C (informative) Compatibility [[diff]](./#diff)

## C.4 C++ and ISO C++ 2014 [[diff.cpp14]](diff.cpp14#except)

### C.4.7 [[except]](except "14 Exception handling"): exception handling [diff.cpp14.except]

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/compatibility.tex#L1788)

**Affected subclause:** [[except.spec]](except.spec)  


**Change:** Remove dynamic exception specifications[.](#1.sentence-1)

  


**Rationale:** Dynamic exception specifications were a deprecated feature
that was complex and brittle in use[.](#1.sentence-2)

They interacted badly with the type system,
which became a more significant issue in this revision of C++
where (non-dynamic) exception specifications are part of the function type[.](#1.sentence-3)

  


**Effect on original feature:** A valid C++ 2014 function declaration,
member function declaration,
function pointer declaration,
or function reference declaration,
if it has a potentially throwing dynamic exception specification,
is rejected as ill-formed in this revision of C++[.](#1.sentence-4)

Violating a non-throwing dynamic exception specification
calls terminate rather than unexpected,
and it is unspecified whether stack unwinding is performed
prior to such a call[.](#1.sentence-5)