llvm-project/clang
Erich Keane 07325c80d9 Add extension to always default-initialize nullptr_t.
Core issue 1013 suggests that having an uninitialied std::nullptr_t be
UB is a bit foolish, since there is only a single valid value. This DR
reports that DR616 fixes it, which does so by making lvalue-to-rvalue
conversions from nullptr_t be equal to nullptr.

However, just implementing that results in warnings/etc in many places.
In order to fix all situations where nullptr_t would seem uninitialized,
this patch instead (as an otherwise transparent extension) default
initializes uninitialized VarDecls of nullptr_t.

Differential Revision: https://reviews.llvm.org/D53713

Change-Id: I84d72a9290054fa55341e8cbdac43c8e7f25b885
llvm-svn: 349201
2018-12-14 22:22:29 +00:00
..
INPUTS
bindings Revert "Try to update the test to fix the breakage With the new warning, we are showing one more output in the test." 2018-12-14 00:43:36 +00:00
cmake [Driver] Support XRay on Fuchsia 2018-11-22 02:36:47 +00:00
docs Implement -frecord-command-line (-frecord-gcc-switches) 2018-12-14 15:38:15 +00:00
examples Test commit - delete trailing space. 2018-11-19 12:16:05 +00:00
include [Clang] Add __builtin_launder 2018-12-14 21:11:28 +00:00
lib Add extension to always default-initialize nullptr_t. 2018-12-14 22:22:29 +00:00
runtime [CMake] Make bootstrap and compiler-rt depend on cxx-headers. 2018-06-28 18:35:25 +00:00
test Add extension to always default-initialize nullptr_t. 2018-12-14 22:22:29 +00:00
tools Update the scan-build to generate SARIF. 2018-12-13 20:55:34 +00:00
unittests Attempt to fix code completion test to handle LLP64 platforms 2018-12-13 21:41:07 +00:00
utils Portable Python script across Python version 2018-12-13 07:44:19 +00:00
www [constexpr][c++2a] Try-catch blocks in constexpr functions 2018-12-10 19:03:12 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitignore NFC: Add .vscode to .gitignore 2018-12-03 22:51:07 +00:00
CMakeLists.txt inhereit LLVM_ENABLE_LIBXML2 2018-11-29 14:57:14 +00:00
CODE_OWNERS.TXT Add myself as code owner for OpenBSD driver 2018-11-30 21:42:34 +00:00
INSTALL.txt
LICENSE.TXT Update copyright year to 2018. 2018-06-18 12:22:17 +00:00
ModuleInfo.txt
NOTES.txt PTH-- Remove feature entirely- 2018-12-04 14:34:09 +00:00
README.txt

README.txt

//===----------------------------------------------------------------------===//
// C Language Family Front-end
//===----------------------------------------------------------------------===//

Welcome to Clang.  This is a compiler front-end for the C family of languages
(C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM
compiler infrastructure project.

Unlike many other compiler frontends, Clang is useful for a number of things
beyond just compiling code: we intend for Clang to be host to a number of
different source-level tools.  One example of this is the Clang Static Analyzer.

If you're interested in more (including how to build Clang) it is best to read
the relevant web sites.  Here are some pointers:

Information on Clang:             http://clang.llvm.org/
Building and using Clang:         http://clang.llvm.org/get_started.html
Clang Static Analyzer:            http://clang-analyzer.llvm.org/
Information on the LLVM project:  http://llvm.org/

If you have questions or comments about Clang, a great place to discuss them is
on the Clang development mailing list:
  http://lists.llvm.org/mailman/listinfo/cfe-dev

If you find a bug in Clang, please file it in the LLVM bug tracker:
  http://llvm.org/bugs/