contracts-try 0.7.0

Design-by-contract attributes
Documentation 
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/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

use crate::implementation::{ContractMode, ContractType, FuncWithContracts};
use proc_macro2::TokenStream;
use syn::ItemFn;

pub(crate) fn requires(
    mode: ContractMode,
    attr: TokenStream,
    toks: TokenStream,
) -> TokenStream {
    let ty = ContractType::Requires;

    let func: ItemFn = syn::parse_quote!(#toks);

    let f = FuncWithContracts::new_with_initial_contract(func, ty, mode, attr);

    f.generate()
}