fluence_sdk_wit/fce_macro_impl.rs
1/*
2 * Copyright 2020 Fluence Labs Limited
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17use crate::parse_macro_input::ParseMacroInput;
18
19use proc_macro2::TokenStream;
20use quote::ToTokens;
21use syn::Result;
22
23pub fn fce(tokens: TokenStream) -> Result<TokenStream> {
24 let item = syn::parse2::<syn::Item>(tokens)?;
25 // convert proc_macro2 token to internal AST type
26 let fce_ast_item = item.parse_macro_input()?;
27
28 // convert internal AST type to sequence of tokens
29 let mut tokens = TokenStream::new();
30 fce_ast_item.to_tokens(&mut tokens);
31
32 Ok(tokens)
33}