"""\********************************************************************************* Copyright (c) 2025 the Qrisp authors** This program and the accompanying materials are made available under the* terms of the Eclipse Public License 2.0 which is available at* http://www.eclipse.org/legal/epl-2.0.** This Source Code may also be made available under the following Secondary* Licenses when the conditions for such availability set forth in the Eclipse* Public License, v. 2.0 are satisfied: GNU General Public License, version 2* with the GNU Classpath Exception which is* available at https://www.gnu.org/software/classpath/license.html.** SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0********************************************************************************/"""fromqrisp.coreimportQuantumVariable
[docs]classQuantumChar(QuantumVariable):r""" A QuantumVariable which represents characters. By default, the QuantumChar is initialized in NISQ mode, meaning that instead of 256 characters it can only hold 32, saving almost 40% in qubit cost. >>> from qrisp import QuantumChar >>> q_ch = QuantumChar(nisq_char = True) The chars which can be represented in ``nisq mode`` are +---+---+---+---+---+---+---+---+---+---+----+----+----+----+----+----+----+ | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | +---+---+---+---+---+---+---+---+---+---+----+----+----+----+----+----+----+ | a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | +---+---+---+---+---+---+---+---+---+---+----+----+----+----+----+----+----+ +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+ | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+ | r | s | t | u | v | w | x | y | z | | . | ! | ? | : | , | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+ If ``nisq_mode`` is set to False, the encoder uses the Python-inbuild chr function. """defdecoder(self,i):ifself.nisq_char:return"abcdefghijklmnopqrstuvwxyz .!?:,"[i]else:returnchr(i)def__init__(self,qs=None,name=None,nisq_char=True):self.nisq_char=nisq_charifnisq_char:super().__init__(5,qs=qs,name=name)else:super().__init__(8,qs=qs,name=name)
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