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// Copyright (C) 2019-2023 Aleo Systems Inc.
// This file is part of the snarkVM library.

// 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.

use crate::r1cs::errors::SynthesisError;

pub trait Assignment<T> {
    fn get(self) -> Result<T, SynthesisError>;

    fn get_ref(&self) -> Result<&T, SynthesisError>;
}

impl<T> Assignment<T> for Option<T> {
    fn get(self) -> Result<T, SynthesisError> {
        match self {
            Some(v) => Ok(v),
            None => Err(SynthesisError::AssignmentMissing),
        }
    }

    fn get_ref(&self) -> Result<&T, SynthesisError> {
        match *self {
            Some(ref v) => Ok(v),
            None => Err(SynthesisError::AssignmentMissing),
        }
    }
}