Add reference to positional arguments documentation.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97298 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Analysis/Analyses/PrintfFormatString.h b/include/clang/Analysis/Analyses/PrintfFormatString.h
index 18c92743cf33826ee3ff235aba5334f6b70fddcb..e4f7c57061d41d59d202a3ce432c010bd5cfe7c8 100644 (file)
--- a/include/clang/Analysis/Analyses/PrintfFormatString.h
+++ b/include/clang/Analysis/Analyses/PrintfFormatString.h
@@ -195,6 +195,9 @@ class FormatSpecifier {
   unsigned HasSpacePrefix : 1;
   unsigned HasAlternativeForm : 1;
   unsigned HasLeadingZeroes : 1;
+  /// Positional arguments, an IEEE extension:
+  ///  IEEE Std 1003.1, 2004 Edition
+  ///  http://www.opengroup.org/onlinepubs/009695399/functions/printf.html
   unsigned UsesPositionalArg : 1;
   unsigned argIndex;
   ConversionSpecifier CS;