1 files changed, 124 insertions, 0 deletions
diff --git a/sources/shiboken2/shibokenmodule/support/signature/errorhandler.py b/sources/shiboken2/shibokenmodule/support/signature/errorhandler.py
new file mode 100644
index 000000000..902bb05af
--- /dev/null
+++ b/sources/shiboken2/shibokenmodule/support/signature/errorhandler.py
@@ -0,0 +1,124 @@
+#############################################################################
+##
+## Copyright (C) 2019 The Qt Company Ltd.
+## Contact: https://www.qt.io/licensing/
+##
+## This file is part of Qt for Python.
+##
+## $QT_BEGIN_LICENSE:LGPL$
+## Commercial License Usage
+## Licensees holding valid commercial Qt licenses may use this file in
+## accordance with the commercial license agreement provided with the
+## Software or, alternatively, in accordance with the terms contained in
+## a written agreement between you and The Qt Company. For licensing terms
+## and conditions see https://www.qt.io/terms-conditions. For further
+## information use the contact form at https://www.qt.io/contact-us.
+##
+## GNU Lesser General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU Lesser
+## General Public License version 3 as published by the Free Software
+## Foundation and appearing in the file LICENSE.LGPL3 included in the
+## packaging of this file. Please review the following information to
+## ensure the GNU Lesser General Public License version 3 requirements
+## will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+##
+## GNU General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU
+## General Public License version 2.0 or (at your option) the GNU General
+## Public license version 3 or any later version approved by the KDE Free
+## Qt Foundation. The licenses are as published by the Free Software
+## Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+## included in the packaging of this file. Please review the following
+## information to ensure the GNU General Public License requirements will
+## be met: https://www.gnu.org/licenses/gpl-2.0.html and
+## https://www.gnu.org/licenses/gpl-3.0.html.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+from __future__ import print_function, absolute_import
+
+"""
+errorhandler.py
+
+This module handles the TypeError messages which were previously
+produced by the generated C code.
+
+This version is at least consistent with the signatures, which
+are created by the same module.
+
+Experimentally, we are trying to guess those errors which are
+just the wrong number of elements in an iterator.
+At the moment, it is unclear whether the information given is
+enough to produce a useful ValueError.
+
+This matter will be improved in a later version.
+"""
+
+from signature_loader import get_signature, inspect
+from signature_loader.mapping import update_mapping, namespace
+from textwrap import dedent
+
+
+def qt_isinstance(inst, the_type):
+    if the_type == float:
+        return isinstance(inst, int) or isinstance(int, float)
+    try:
+        return isinstance(inst, the_type)
+    except TypeError as e:
+        print("FIXME", e)
+        return False
+
+
+def matched_type(args, sigs):
+    for sig in sigs:
+        params = list(sig.parameters.values())
+        if len(args) > len(params):
+            continue
+        if len(args) < len(params):
+            k = len(args)
+            if params[k].default is params[k].empty:
+                # this is a necessary parameter, so it fails.
+                continue
+        ok = True
+        for arg, param in zip(args, params):
+            ann = param.annotation
+            if qt_isinstance(arg, ann):
+                continue
+            ok = False
+        if ok:
+            return sig
+    return None
+
+
+def seterror_argument(args, func_name):
+    update_mapping()
+    func = eval(func_name, namespace)
+    sigs = get_signature(func, "typeerror")
+    if type(sigs) != list:
+        sigs = [sigs]
+    if type(args) != tuple:
+        args = (args,)
+    # temp!
+    found = matched_type(args, sigs)
+    if found:
+        msg = dedent("""
+            '{func_name}' called with wrong argument values:
+              {func_name}{args}
+            Found signature:
+              {func_name}{found}
+            """.format(**locals())).strip()
+        return ValueError, msg
+    type_str = ", ".join(type(arg).__name__ for arg in args)
+    msg = dedent("""
+        '{func_name}' called with wrong argument types:
+          {func_name}({type_str})
+        Supported signatures:
+        """.format(**locals())).strip()
+    for sig in sigs:
+        msg += "\n  {func_name}{sig}".format(**locals())
+    # We don't raise the error here, to avoid the loader in the traceback.
+    return TypeError, msg
+
+# end of file