Start fleshing out Sema::AlternateCheckPrintfString():
- Add an anonymous class 'CheckPrintfHandler' which will do the
  checking of specific format specifiers
- Add checking for using the '@' conversion specifier outside
  an ObjC string literal
- Add checking for null characters within the string


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94761 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed