[Bug c/52952] Wformat location info is bad (wrong column number)

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52952

--- Comment #36 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Latest patch: https://gcc.gnu.org/ml/gcc-patches/2014-11/msg00663.html

Joseph pointed out that it does not handle escape sequences. The only solution
I can think of is to open the file and re-parse the string. However, it doesn't
seem trivial to re-use libcpp to parse a string given as a char *. Any ideas
how to achieve this or a better alternative?

Escape sequences are too common to ignore in a first implementation.