Add better reporting and new features

Units report expected results on end of input.
Opposite parser helps with the complexity explosion
on unit parsers.
Input and error printing has context.

1 files changed, 1 insertions, 0 deletions

diff --git a/package.lisp b/package.lisp
index 2b64c6f..a20934f 100644
--- a/package.lisp
+++ b/package.lisp
@@ -10,6 +10,7 @@
            #:one-of
            #:unit
            #:fail
+           #:opposite
            #:literal
            #:nothing
            #:optional