Functions for error reporting out of macros.

* eval.c (eval_init): Register sys:ctx-form and sys:ctx-name
intrinsics.

* lisplib.c (error_set_entries, error_instantiate): New static
functions.
(lisplib_init): Register autoloading of error.tl via
new functions.

* share/txr/stdlib/error.tl: New file.

* struct.c (make_struct_type): Purge deferred warnings.

* unwind.c (uw_late_init): Register purge-deferred-warning
intrinsic.

1 files changed, 46 insertions, 0 deletions

diff --git a/share/txr/stdlib/error.tl b/share/txr/stdlib/error.tl
new file mode 100644
index 00000000..355b39e6
--- /dev/null
+++ b/share/txr/stdlib/error.tl
@@ -0,0 +1,46 @@
+;; Copyright 2017
+;; Kaz Kylheku <kaz@kylheku.com>
+;; Vancouver, Canada
+;; All rights reserved.
+;;
+;; Redistribution and use in source and binary forms, with or without
+;; modification, are permitted provided that the following conditions are met:
+;;
+;; 1. Redistributions of source code must retain the above copyright notice, this
+;;    list of conditions and the following disclaimer.
+;;
+;; 2. Redistributions in binary form must reproduce the above copyright notice,
+;;    this list of conditions and the following disclaimer in the documentation
+;;    and/or other materials provided with the distribution.
+;;
+;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+;; ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+;; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+;; FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+;; SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+;; CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+;; OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+;; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+(defun sys:loc (ctx)
+  (iflet ((loc (source-loc-str (sys:ctx-form ctx))))
+    `(@loc) ` ""))
+
+(defun compile-error (ctx fmt . args)
+  (let ((loc (sys:loc ctx))
+        (name (sys:ctx-name ctx)))
+    (throwf 'eval-error `@loc~s: @fmt` name . args)))
+
+(defun compile-warning (ctx fmt . args)
+  (let ((loc (sys:loc ctx))
+        (name (sys:ctx-name ctx)))
+    (throwf 'warning `@loc~s: @fmt` name . args)))
+
+(defun compile-defr-warning (ctx tag fmt . args)
+  (let ((loc (sys:loc ctx))
+        (name (sys:ctx-name ctx)))
+    (catch
+      (throw 'warning (fmt `@loc~s: @fmt` name . args) . tag)
+      (continue ()))))