link matchlib
September 2, 1991; Ralph E. Griswold
See also: parsgen.icn
This file is in the public domain.
These procedures perform low-level "lexical" matching for
recursive-descent pattern matchers.
rb_() match right bracket
lb_() match left bracket
rp_() match right parenthesis
lp_() match left parenthesis
vb_() match vertical bar
nl_() match newline
empty_() match empty string