git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173368 91177308-0d34-0410-b5e6-96231b3b80d8

basic source character set in C++98. Add -Wc++98-compat diagnostics for same in
literals in C++11. Extend such support to cover string literals as well as
character literals, and mark N2170 as done.

This seems too minor to warrant a release note to me. Let me know if you disagree.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152444 91177308-0d34-0410-b5e6-96231b3b80d8

Add basic type checking of format string conversion specifiers and their arguments.  Thanks to Cristian Draghici for his help with this patch!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94864 91177308-0d34-0410-b5e6-96231b3b80d8

 - This is designed to make it obvious that %clang_cc1 is a "test variable"
   which is substituted. It is '%clang_cc1' instead of '%clang -cc1' because it
   can be useful to redefine what gets run as 'clang -cc1' (for example, to set
   a default target).

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git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68107 91177308-0d34-0410-b5e6-96231b3b80d8

Implement UCN support for C string literals (C99 6.4.3) and add some very basic tests. Chris Goller has graciously offered to write some test to help validate UCN support.

From a front-end perspective, I believe this code should work for ObjC @-strings. At the moment, I believe we need to tweak the code generation for @-strings (which doesn't appear to handle them). Will be investigating.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68076 91177308-0d34-0410-b5e6-96231b3b80d8