C++ Guard Expansion Doesn't Work on Windows

[rgarber11]

In the C++ #guard snippet, the repeated section to change the path: ${TM_DIRECTORY/.*[\\\/](.*)/_${1:/upcase}/} does not support Windows paths with C:... syntax.

Instead, they appear as:

#ifndef INCLUDEC:\Users\rg102\CompileCollective\src_SCAN_H_
#define INCLUDEC:\Users\rg102\CompileCollective\src_SCAN_H_



#endif  // INCLUDEC:\Users\rg102\CompileCollective\src_SCAN_H_

Changing the match group to [\\/\\\\] solves this problem while maintaining *nix compatibility.

Now, on Windows you get:

#ifndef INCLUDE_SRC_SCAN_H_
#define INCLUDE_SRC_SCAN_H_



#endif  // INCLUDE_SRC_SCAN_H_

And you get the same thing on Linux.

If needed, I can submit a PR fixing this.

[OkelleyDevelopment]

@rgarber11 feel free to raise a PR 🙌

[rgarber11]

Opened PR #552