equality

Equality predicates (eq, eql, equal, equalp) and their semantics.

Programming Why member behaves differently in FiveAM tests (SBCL)

SBCL may intern string literals when compiling, so (member "foo" '("foo") :test #'eql) can match by identity. Use equal or string= for consistent results.

#common-lisp
#sbcl
#fiveam
#string-comparison
#equality
#testing

1 answer• 1 view

01/04/2026, 03:24 PM