Provide access to line number info and source path.

* eval.c (eval_init): New intrinsic functions source-loc
and source-loc-str. New variable *self-path*.

* txr.1: Stub doc sections.

* txr.c (self_path): New variable.

* txr.h (self_path): Declared.

* txr.vim: Syntax highlighting for source-loc, source-loc-str
and *self-path*.

1 files changed, 1 insertions, 0 deletions

diff --git a/txr.h b/txr.h
index 8f6b7f91..669ceff3 100644
--- a/txr.h
+++ b/txr.h
@@ -35,3 +35,4 @@ extern int opt_vg_debug;
 extern int opt_derivative_regex;
 extern const wchli_t *version;
 extern const wchar_t *progname;
+extern val self_path;