src/parser/parser-expr-impl.lisp: Compare paren tags with `eql'.

They're often characters, which can't reliably be compared with `eq'.
Not sure what I was thinking, really.

diff --git a/src/parser/parser-expr-impl.lisp b/src/parser/parser-expr-impl.lisp
index 5ae4035..41c154f 100644 (file)
--- a/src/parser/parser-expr-impl.lisp
+++ b/src/parser/parser-expr-impl.lisp
@@ -151,7 +151,7 @@
          (let ((head (car opstack)))
            (cond ((not (typep head 'open-parenthesis))
                   (apply-operator head state))
-                 ((not (eq (slot-value head 'tag) tag))
+                 ((not (eql (slot-value head 'tag) tag))
                   (fail))
                  (t
                   (return)))