trixy 0.4.0

A rust crate used to generate multi-language apis for your application
Documentation 
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/*
* Copyright (C) 2023 - 2024:
* The Trinitrix Project <soispha@vhack.eu, antifallobst@systemausfall.org>
* SPDX-License-Identifier: GPL-3.0-or-later
*
* This file is part of the Trixy crate for Trinitrix.
*
* Trixy is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* and the GNU General Public License along with this program.
* If not, see <https://www.gnu.org/licenses/>.
*/

use proc_macro2::TokenStream as TokenStream2;
use quote::quote;

use crate::parser::command_spec::{Function, Identifier, NamedType, Type};

impl Function {
    pub fn to_rust_identifier<F>(
        &self,
        input_fmt_fn: fn(&NamedType) -> TokenStream2,
        output_fmt_fn: F,
    ) -> TokenStream2
    where
        F: Fn(&Type) -> TokenStream2,
    {
        let ident = self.identifier.to_rust();
        let inputs: Vec<TokenStream2> = self
            .inputs
            .iter()
            .map(input_fmt_fn)
            .filter(|a| !a.is_empty())
            .collect();

        let output = &self.output;

        if inputs.is_empty() && output.is_none() {
            quote! {
                #ident
            }
        } else if output.is_some() && !Type::is_void(output.as_ref()) {
            let output = output_fmt_fn(&output.as_ref().expect("We checked"));
            quote! {
                #ident {
                    trixy_output: #output ,
                    #(#inputs),*
                }
            }
        } else if (output.is_none() || Type::is_void(output.as_ref())) && !inputs.is_empty() {
            quote! {
                #ident { #(#inputs),* }
            }
        } else {
            unreachable!("All other conditions should be met")
        }
    }

    pub fn to_rust(&self, _namespaces: &[&Identifier]) -> TokenStream2 {
        let doc_comments: TokenStream2 = self
            .attributes
            .iter()
            .map(|attr| attr.to_rust(&self.identifier))
            .collect();

        let function_ident = self.to_rust_identifier(
            |a| NamedType::to_rust(a).unwrap_or(TokenStream2::default()),
            move |r#type| {
                let ident = r#type.to_c();
                quote! {
                    trixy::oneshot::Sender<#ident>
                }
            },
        );

        quote! {
            #doc_comments
            #[allow(non_camel_case_types)]
            #function_ident
        }
    }
}