[clang-tidy] add new check cppcoreguidelines-pro-type-cstyle-cast

Summary:
This check flags all use of c-style casts that perform a static_cast
downcast, const_cast, or reinterpret_cast.

Use of these casts can violate type safety and cause the program to
access a
variable that is actually of type X to be accessed as if it were of an
unrelated type Z. Note that a C-style (T)expression cast means to
perform
the first of the following that is possible: a const_cast, a
static_cast, a
static_cast followed by a const_cast, a reinterpret_cast, or a
reinterpret_cast followed by a const_cast. This rule bans (T)expression
only when used to perform an unsafe cast.

This rule is part of the "Type safety" profile of the C++ Core
Guidelines, see
https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#-type4-dont-use-c-style-texpression-casts-that-would-perform-a-static_cast-downcast-const_cast-or-reinterpret_cast.

Reviewers: alexfh, sbenza, bkramer, aaron.ballman

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D14096

llvm-svn: 252425

0 files changed, 0 insertions, 0 deletions