linenoise completion for txr symbols

Implement basic tab completion.

* lib.c (package_alist, package_name, package_symbols): New
functions.

* lib.h (package_alist, package_name, package_symbols):
Declared.

* parser.c (find_matching_syms, provide_completions):
New static functions.
(repl): Register provide_completions as completion callback
with linenoise.

1 files changed, 3 insertions, 0 deletions

diff --git a/lib.h b/lib.h
index a7b4187b..7cb6d89b 100644
--- a/lib.h
+++ b/lib.h
@@ -711,6 +711,9 @@ val make_package(val name);
 val packagep(val obj);
 val find_package(val name);
 val delete_package(val package);
+val package_alist(void);
+val package_name(val package);
+val package_symbols(val package);
 val intern(val str, val package);
 val rehome_sym(val sym, val package);
 val symbolp(val sym);