stronghold-stm 0.4.3

// Copyright 2020-2022 IOTA Stiftung
// SPDX-License-Identifier: Apache-2.0

use crate::stm::error::TxError;
use std::{collections::HashSet, fmt::Debug};

/// The different types that can be encapsulated in a TVAr
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum SharedValue {
    SharedUsize(usize),
    SharedString(String),
    SharedHashSetOfString(HashSet<String>),
    SharedVectorOfString(Vec<String>),
    SharedVectorOfUsize(Vec<usize>),
}
use SharedValue::*;

// Macro to implement the trait [`TryFrom`] for the variants of [`SharedValue`]
#[macro_export]
macro_rules! impl_try_from {
    ( $type:ty, $variant:ident ) => {
        impl TryFrom<SharedValue> for $type {
            type Error = TxError;

            fn try_from(value: SharedValue) -> Result<Self, Self::Error> {
                match value {
                    $variant(v) => Ok(v),
                    _ => Err(TxError::SharedValueWrongTypeConversion),
                }
            }
        }
    };
}

impl_try_from!(usize, SharedUsize);
impl_try_from!(String, SharedString);
impl_try_from!(HashSet<String>, SharedHashSetOfString);
impl_try_from!(Vec<String>, SharedVectorOfString);
impl_try_from!(Vec<usize>, SharedVectorOfUsize);