tree a3e838775742acfc3ebc044c7aec6018f8370943
parent 2749ac133972d027fe9482acc81f6e88c4f36812
author Tom Tromey <tom@tromey.com> 1635207624 -0600
committer Tom Tromey <tom@tromey.com> 1639331798 -0700

C++-ify path substitution code

I found some uses of xfree in the path substitution code in source.c.
C++-ifying struct substitute_path_rule both simplifies the code and
removes manual memory management.

Regression tested on x86-64 Fedora 34.