doc/concepts.tex: Fix subclass/superclass confusion.

[sod] / src / module-impl.lisp

diff --git a/src/module-impl.lisp b/src/module-impl.lisp
index cb3a8ad..268f4bc 100644 (file)
--- a/src/module-impl.lisp
+++ b/src/module-impl.lisp
@@ -73,9 +73,11 @@
     (let ((existing (gethash truename *module-map*)))
       (cond ((null existing))
            ((eq (module-state existing) t)
+            (when (plusp (module-errors existing))
+              (error "Module `~A' contains errors" name))
             (return-from build-module existing))
            (t
-            (error "Module ~A already being imported at ~A"
+            (error "Module `~A' already being imported at ~A"
                    name (module-state existing))))))
 
   ;; Construct the new module.
@@ -101,10 +103,14 @@
   (progv
       (mapcar #'car *module-bindings-alist*)
       (module-variables module)
-    (unwind-protect (funcall thunk)
-      (setf (module-variables module)
-           (mapcar (compose #'car #'symbol-value)
-                   *module-bindings-alist*)))))
+    (handler-bind ((error (lambda (cond)
+                           (declare (ignore cond))
+                           (incf (slot-value module 'errors))
+                           :decline)))
+      (unwind-protect (funcall thunk)
+       (setf (module-variables module)
+             (mapcar (compose #'car #'symbol-value)
+                     *module-bindings-alist*))))))
 
 (defun call-with-temporary-module (thunk)
   "Invoke THUNK in the context of a temporary module, returning its values.
@@ -146,16 +152,6 @@
 ;;;--------------------------------------------------------------------------
 ;;; Code fragments.
 
-(export '(c-fragment c-fragment-text))
-(defclass c-fragment ()
-  ((location :initarg :location :type file-location :reader file-location)
-   (text :initarg :text :type string :reader c-fragment-text))
-  (:documentation
-   "Represents a fragment of C code to be written to an output file.
-
-   A C fragment is aware of its original location, and will bear proper
-   `#line' markers when written out."))
-
 (defun output-c-excursion (stream location func)
   "Invoke FUNC surrounding it by writing #line markers to STREAM.