.. This file is part of Logtalk https://logtalk.org/ SPDX-FileCopyrightText: 1998-2024 Paulo Moura <pmoura@logtalk.org> SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

.. rst-class:: align-right

built-in method

.. index:: pair: ununinstantiation_error/1; Built-in method .. _methods_uninstantiation_error_1:

uninstantiation_error/1

Description

::

uninstantiation_error(Culprit)

Throws an uninstantiation error. Used when an argument or one of its sub-arguments is bound but a variable is required. For example, trying to open a file with a stream argument bound.

This built-in method is declared private and thus cannot be used as a message to an object. Calling this predicate is equivalent to the following sequence of calls:

::

..., context(Context), throw(error(uninstantiation_error(Culprit), Context)).

This allows the user to generate errors in the same format used by the runtime.

Modes and number of proofs

::

uninstantiation_error(@nonvar) - error

Errors

| When called: | uninstantiation_error(Culprit)

Examples

::

..., var(Handler), uninstantiation_error(my_stream).

.. seealso::

:ref:methods_catch_3, :ref:methods_throw_1, :ref:methods_context_1, :ref:methods_instantiation_error_0, :ref:methods_type_error_2, :ref:methods_domain_error_2, :ref:methods_existence_error_2, :ref:methods_permission_error_3, :ref:methods_representation_error_1, :ref:methods_evaluation_error_1, :ref:methods_resource_error_1, :ref:methods_syntax_error_1, :ref:methods_system_error_0