Switch to Clang's isDigit function.

std::isdigit can be overloaded, causing the template deduction to fail.  Use
Clang's isDigit function which to avoid this.  Switch the other calls for
consistency.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@330887 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed