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Implement basic derivation

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Kodi Craft 2024-06-19 23:25:45 +02:00
commit 450415eb6b
Signed by: kodi
GPG Key ID: 69D9EED60B242822
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{
"customizations": {
"vscode": {
"extensions": [
"mkhl.direnv"
]
}
},
"image": "ghcr.io/cachix/devenv:latest",
"overrideCommand": false,
"updateContentCommand": "devenv test"
}

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if ! has nix_direnv_version || ! nix_direnv_version 2.2.1; then
source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.2.1/direnvrc" "sha256-zelF0vLbEl5uaqrfIzbgNzJWGmLzCmYAkInj/LNxvKs="
fi
watch_file flake.nix
watch_file flake.lock
if ! use flake . --impure
then
echo "devenv could not be built. The devenv environment was not loaded. Make the necessary changes to devenv.nix and hit enter to try again." >&2
fi

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/target
.direnv
.devenv
# Added by cargo
#
# already existing elements were commented out
#/target

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/nix/store/kk5bnf5cnva2iv7mhkz9drljamjqw18w-pre-commit-config.json

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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
[[package]]
name = "eagle"
version = "0.1.0"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "proc-macro2"
version = "1.0.85"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "22244ce15aa966053a896d1accb3a6e68469b97c7f33f284b99f0d576879fc23"
dependencies = [
"unicode-ident",
]
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version = "1.0.36"
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checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
dependencies = [
"proc-macro2",
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[[package]]
name = "syn"
version = "2.0.66"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c42f3f41a2de00b01c0aaad383c5a45241efc8b2d1eda5661812fda5f3cdcff5"
dependencies = [
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"unicode-ident",
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[[package]]
name = "unicode-ident"
version = "1.0.12"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"

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[package]
name = "eagle"
version = "0.1.0"
edition = "2021"
license = "AGPL-3.0"
[dependencies]
proc-macro2 = "1.0.85"
quote = "1.0.36"
syn = "2.0.66"
[lib]
proc-macro = true

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# GNU AFFERO GENERAL PUBLIC LICENSE
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author or copyright holder as a result of your choosing to follow a
later version.
### 15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
CORRECTION.
### 16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
### 17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
## How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these
terms.
To do so, attach the following notices to the program. It is safest to
attach them to the start of each source file to most effectively state
the exclusion of warranty; and each file should have at least the
"copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper
mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for
the specific requirements.
You should also get your employer (if you work as a programmer) or
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. For more information on this, and how to apply and follow
the GNU AGPL, see <https://www.gnu.org/licenses/>.

60
README.md Normal file
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@ -0,0 +1,60 @@
# Eagle
## Disclaimer
Eagle is still in development and not currently usable. The current state is barely a proof of concept.
## What is Eagle?
Eagle is a library designed to make "full-stack" applications with Rust. It allows you to define a communication protocl
based on simple "questions" and "answers" which can be implemented as simple functions. From the perspective of the client
(which sends "questions") the protocol is simply a set of async functions on a struct. From the perspective of the server
(which sends "answers") the protocol is a trait which it implements on any struct of its choice.
## Using Eagle
The way that `eagle` is designed to be used is inside a shared dependency between your "server" and your "client". Both of these should be in a workspace. Create a `shared` crate which both components should depend on. Inside this crate, you can
define your protocol as an enum:
```rs
use eagle::Protocol;
#[derive(Protocol)]
pub enum TestProtocol {
Addition((i32, i32), i32),
SomeKindOfQuestion(String, i32)
}
```
In your server, you will be able to implement this protocol for any struct (and in the future register it for communication):
```rs
use shared::TestProtocolServer;
pub struct Server;
impl TestProtocolServer for Server {
fn addition(&mut self, a: i32, b: i32) -> i32 {
a + b
}
fn some_kind_of_question(&mut self, question: String) -> i32 {
42
}
}
```
In your client, you can use an instance of the client struct to query the server:
```rs
use shared::TestProtocolClient;
#[tokio::main]
async fn main() {
let client = TestProtocolClient::new();
assert_eq!(client.addition(2, 2).await, 4);
}
```
## License
Eagle is licensed under the AGPL (GNU Affero General Public License). To learn more, read [LICENSE](LICENSE)

482
flake.lock generated Normal file
View File

@ -0,0 +1,482 @@
{
"nodes": {
"cachix": {
"inputs": {
"devenv": "devenv_2",
"flake-compat": [
"devenv",
"flake-compat"
],
"nixpkgs": [
"devenv",
"nixpkgs"
],
"pre-commit-hooks": [
"devenv",
"pre-commit-hooks"
]
},
"locked": {
"lastModified": 1712055811,
"narHash": "sha256-7FcfMm5A/f02yyzuavJe06zLa9hcMHsagE28ADcmQvk=",
"owner": "cachix",
"repo": "cachix",
"rev": "02e38da89851ec7fec3356a5c04bc8349cae0e30",
"type": "github"
},
"original": {
"owner": "cachix",
"repo": "cachix",
"type": "github"
}
},
"devenv": {
"inputs": {
"cachix": "cachix",
"flake-compat": "flake-compat_2",
"nix": "nix_2",
"nixpkgs": [
"nixpkgs"
],
"pre-commit-hooks": "pre-commit-hooks"
},
"locked": {
"lastModified": 1718803884,
"narHash": "sha256-f7M9k4JJs8gRLtGmSELu+IJM5AvDo5Z7ZFuQGEqDJ1g=",
"owner": "cachix",
"repo": "devenv",
"rev": "65e7d51c62114670d38c84aff6cfdfe2ca18bf57",
"type": "github"
},
"original": {
"owner": "cachix",
"repo": "devenv",
"type": "github"
}
},
"devenv_2": {
"inputs": {
"flake-compat": [
"devenv",
"cachix",
"flake-compat"
],
"nix": "nix",
"nixpkgs": "nixpkgs",
"poetry2nix": "poetry2nix",
"pre-commit-hooks": [
"devenv",
"cachix",
"pre-commit-hooks"
]
},
"locked": {
"lastModified": 1708704632,
"narHash": "sha256-w+dOIW60FKMaHI1q5714CSibk99JfYxm0CzTinYWr+Q=",
"owner": "cachix",
"repo": "devenv",
"rev": "2ee4450b0f4b95a1b90f2eb5ffea98b90e48c196",
"type": "github"
},
"original": {
"owner": "cachix",
"ref": "python-rewrite",
"repo": "devenv",
"type": "github"
}
},
"fenix": {
"inputs": {
"nixpkgs": [
"nixpkgs"
],
"rust-analyzer-src": "rust-analyzer-src"
},
"locked": {
"lastModified": 1717827974,
"narHash": "sha256-ixopuTeTouxqTxfMuzs6IaRttbT8JqRW5C9Q/57WxQw=",
"owner": "nix-community",
"repo": "fenix",
"rev": "ab655c627777ab5f9964652fe23bbb1dfbd687a8",
"type": "github"
},
"original": {
"owner": "nix-community",
"repo": "fenix",
"type": "github"
}
},
"flake-compat": {
"flake": false,
"locked": {
"lastModified": 1673956053,
"narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=",
"owner": "edolstra",
"repo": "flake-compat",
"rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9",
"type": "github"
},
"original": {
"owner": "edolstra",
"repo": "flake-compat",
"type": "github"
}
},
"flake-compat_2": {
"flake": false,
"locked": {
"lastModified": 1696426674,
"narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
"owner": "edolstra",
"repo": "flake-compat",
"rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
"type": "github"
},
"original": {
"owner": "edolstra",
"repo": "flake-compat",
"type": "github"
}
},
"flake-utils": {
"inputs": {
"systems": "systems"
},
"locked": {
"lastModified": 1689068808,
"narHash": "sha256-6ixXo3wt24N/melDWjq70UuHQLxGV8jZvooRanIHXw0=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "919d646de7be200f3bf08cb76ae1f09402b6f9b4",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"flake-utils_2": {
"inputs": {
"systems": "systems_2"
},
"locked": {
"lastModified": 1710146030,
"narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"gitignore": {
"inputs": {
"nixpkgs": [
"devenv",
"pre-commit-hooks",
"nixpkgs"
]
},
"locked": {
"lastModified": 1709087332,
"narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
"owner": "hercules-ci",
"repo": "gitignore.nix",
"rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
"type": "github"
},
"original": {
"owner": "hercules-ci",
"repo": "gitignore.nix",
"type": "github"
}
},
"nix": {
"inputs": {
"flake-compat": "flake-compat",
"nixpkgs": [
"devenv",
"cachix",
"devenv",
"nixpkgs"
],
"nixpkgs-regression": "nixpkgs-regression"
},
"locked": {
"lastModified": 1712911606,
"narHash": "sha256-BGvBhepCufsjcUkXnEEXhEVjwdJAwPglCC2+bInc794=",
"owner": "domenkozar",
"repo": "nix",
"rev": "b24a9318ea3f3600c1e24b4a00691ee912d4de12",
"type": "github"
},
"original": {
"owner": "domenkozar",
"ref": "devenv-2.21",
"repo": "nix",
"type": "github"
}
},
"nix-github-actions": {
"inputs": {
"nixpkgs": [
"devenv",
"cachix",
"devenv",
"poetry2nix",
"nixpkgs"
]
},
"locked": {
"lastModified": 1688870561,
"narHash": "sha256-4UYkifnPEw1nAzqqPOTL2MvWtm3sNGw1UTYTalkTcGY=",
"owner": "nix-community",
"repo": "nix-github-actions",
"rev": "165b1650b753316aa7f1787f3005a8d2da0f5301",
"type": "github"
},
"original": {
"owner": "nix-community",
"repo": "nix-github-actions",
"type": "github"
}
},
"nix_2": {
"inputs": {
"flake-compat": [
"devenv",
"flake-compat"
],
"nixpkgs": [
"devenv",
"nixpkgs"
],
"nixpkgs-regression": "nixpkgs-regression_2"
},
"locked": {
"lastModified": 1712911606,
"narHash": "sha256-BGvBhepCufsjcUkXnEEXhEVjwdJAwPglCC2+bInc794=",
"owner": "domenkozar",
"repo": "nix",
"rev": "b24a9318ea3f3600c1e24b4a00691ee912d4de12",
"type": "github"
},
"original": {
"owner": "domenkozar",
"ref": "devenv-2.21",
"repo": "nix",
"type": "github"
}
},
"nixpkgs": {
"locked": {
"lastModified": 1692808169,
"narHash": "sha256-x9Opq06rIiwdwGeK2Ykj69dNc2IvUH1fY55Wm7atwrE=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "9201b5ff357e781bf014d0330d18555695df7ba8",
"type": "github"
},
"original": {
"owner": "NixOS",
"ref": "nixpkgs-unstable",
"repo": "nixpkgs",
"type": "github"
}
},
"nixpkgs-regression": {
"locked": {
"lastModified": 1643052045,
"narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
"type": "github"
},
"original": {
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
"type": "github"
}
},
"nixpkgs-regression_2": {
"locked": {
"lastModified": 1643052045,
"narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
"type": "github"
},
"original": {
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
"type": "github"
}
},
"nixpkgs-stable": {
"locked": {
"lastModified": 1710695816,
"narHash": "sha256-3Eh7fhEID17pv9ZxrPwCLfqXnYP006RKzSs0JptsN84=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "614b4613980a522ba49f0d194531beddbb7220d3",
"type": "github"
},
"original": {
"owner": "NixOS",
"ref": "nixos-23.11",
"repo": "nixpkgs",
"type": "github"
}
},
"nixpkgs_2": {
"locked": {
"lastModified": 1716977621,
"narHash": "sha256-Q1UQzYcMJH4RscmpTkjlgqQDX5yi1tZL0O345Ri6vXQ=",
"owner": "cachix",
"repo": "devenv-nixpkgs",
"rev": "4267e705586473d3e5c8d50299e71503f16a6fb6",
"type": "github"
},
"original": {
"owner": "cachix",
"ref": "rolling",
"repo": "devenv-nixpkgs",
"type": "github"
}
},
"poetry2nix": {
"inputs": {
"flake-utils": "flake-utils",
"nix-github-actions": "nix-github-actions",
"nixpkgs": [
"devenv",
"cachix",
"devenv",
"nixpkgs"
]
},
"locked": {
"lastModified": 1692876271,
"narHash": "sha256-IXfZEkI0Mal5y1jr6IRWMqK8GW2/f28xJenZIPQqkY0=",
"owner": "nix-community",
"repo": "poetry2nix",
"rev": "d5006be9c2c2417dafb2e2e5034d83fabd207ee3",
"type": "github"
},
"original": {
"owner": "nix-community",
"repo": "poetry2nix",
"type": "github"
}
},
"pre-commit-hooks": {
"inputs": {
"flake-compat": [
"devenv",
"flake-compat"
],
"flake-utils": "flake-utils_2",
"gitignore": "gitignore",
"nixpkgs": [
"devenv",
"nixpkgs"
],
"nixpkgs-stable": "nixpkgs-stable"
},
"locked": {
"lastModified": 1713775815,
"narHash": "sha256-Wu9cdYTnGQQwtT20QQMg7jzkANKQjwBD9iccfGKkfls=",
"owner": "cachix",
"repo": "pre-commit-hooks.nix",
"rev": "2ac4dcbf55ed43f3be0bae15e181f08a57af24a4",
"type": "github"
},
"original": {
"owner": "cachix",
"repo": "pre-commit-hooks.nix",
"type": "github"
}
},
"root": {
"inputs": {
"devenv": "devenv",
"fenix": "fenix",
"nixpkgs": "nixpkgs_2",
"systems": "systems_3"
}
},
"rust-analyzer-src": {
"flake": false,
"locked": {
"lastModified": 1717583671,
"narHash": "sha256-+lRAmz92CNUxorqWusgJbL9VE1eKCnQQojglRemzwkw=",
"owner": "rust-lang",
"repo": "rust-analyzer",
"rev": "48bbdd6a74f3176987d5c809894ac33957000d19",
"type": "github"
},
"original": {
"owner": "rust-lang",
"ref": "nightly",
"repo": "rust-analyzer",
"type": "github"
}
},
"systems": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
},
"systems_2": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
},
"systems_3": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
}
},
"root": "root",
"version": 7
}

54
flake.nix Normal file
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@ -0,0 +1,54 @@
{
inputs = {
nixpkgs.url = "github:cachix/devenv-nixpkgs/rolling";
systems.url = "github:nix-systems/default";
devenv.url = "github:cachix/devenv";
devenv.inputs.nixpkgs.follows = "nixpkgs";
fenix.url = "github:nix-community/fenix";
fenix.inputs.nixpkgs.follows = "nixpkgs";
};
nixConfig = {
extra-trusted-public-keys = "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw=";
extra-substituters = "https://devenv.cachix.org";
};
outputs = { self, nixpkgs, devenv, systems, ... } @ inputs:
let
forEachSystem = nixpkgs.lib.genAttrs (import systems);
in
{
packages = forEachSystem (system: {
devenv-up = self.devShells.${system}.default.config.procfileScript;
});
devShells = forEachSystem
(system:
let
pkgs = nixpkgs.legacyPackages.${system};
in
{
default = devenv.lib.mkShell {
inherit inputs pkgs;
modules = [
{
packages = with pkgs; [pkg-config];
languages.rust.enable = true;
languages.rust.channel = "nightly";
languages.nix.enable = true;
pre-commit.hooks = {
clippy.enable = true;
rustfmt.enable = true;
cargo-check.enable = true;
};
difftastic.enable = true;
devcontainer.enable = true;
}
];
};
});
};
}

118
src/lib.rs Normal file
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@ -0,0 +1,118 @@
/*
Eagle - A library for creating protocols for full-stack Rust applications
Copyright (c) 2024 KodiCraft
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
use proc_macro::TokenStream;
use quote::quote;
use syn::{parse_macro_input, spanned::Spanned, DeriveInput, Field, Ident};
#[proc_macro_derive(Protocol)]
pub fn derive_protocol(input: TokenStream) -> TokenStream {
let input = parse_macro_input!(input as DeriveInput);
// Must be on an enum
let enum_ = match &input.data {
syn::Data::Enum(e) => e,
_ => {
return syn::Error::new(input.span(), "Protocol can only be derived on enums")
.to_compile_error()
.into()
}
};
let name = &input.ident;
let vis = &input.vis;
let mut server_trait = Vec::new();
let mut client_impl = Vec::new();
for variant in &enum_.variants {
// Every variant must have 2 fields
// The first field is the question (serverbound), the second field is the answer (clientbound)
if variant.fields.len() != 2 {
return syn::Error::new(
variant.span(),
"Every variant on a protocol must have exactly 2 fields",
)
.to_compile_error()
.into();
}
let var_name = ident_to_snake_case(&variant.ident);
let mut variant_fields = variant.fields.iter();
let question_field = variant_fields.next().unwrap();
let question_args = field_to_args(question_field);
let answer_type = variant_fields.next().unwrap().ty.clone();
server_trait.push(quote! {
fn #var_name(&mut self, #question_args) -> #answer_type;
});
client_impl.push(quote! {
pub fn #var_name(&mut self, #question_args) -> #answer_type {
::std::unimplemented!()
}
})
}
// Create a trait which the server will have to implement
let server_trait_name = Ident::new(&format!("{}Server", name), name.span());
let server_trait = quote! {
#vis trait #server_trait_name {
#(#server_trait)*
}
};
let client_struct_name = Ident::new(&format!("{}Client", name), name.span());
let client_struct = quote! {
#vis struct #client_struct_name; // TODO: This struct will have some fields to handle the actual connection
impl #client_struct_name {
#(#client_impl)*
}
};
let expanded = quote! {
#server_trait
#client_struct
};
expanded.into()
}
fn ident_to_snake_case(ident: &Ident) -> Ident {
let ident = ident.to_string();
let mut out = String::new();
for (i, c) in ident.chars().enumerate() {
if c.is_uppercase() {
if i != 0 {
out.push('_');
}
out.push(c.to_lowercase().next().unwrap());
} else {
out.push(c);
}
}
Ident::new(&out, ident.span())
}
fn field_to_args(field: &Field) -> proc_macro2::TokenStream {
let type_ = &field.ty;
if let syn::Type::Tuple(tuple) = type_ {
let mut args = Vec::new();
for (i, elem) in tuple.elems.iter().enumerate() {
let arg = Ident::new(&format!("arg{}", i), elem.span());
args.push(quote! { #arg: #elem });
}
quote! { #( #args ), * }
} else {
quote! { arg: #type_ }
}
}

35
tests/mod.rs Normal file
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/*
Eagle - A library for creating protocols for full-stack Rust applications
Copyright (c) 2024 KodiCraft
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
use eagle::Protocol;
#[derive(Protocol)]
enum TestProtocol {
Addition((i32, i32), i32),
SomeKindOfQuestion(String, i32),
}
struct DummyServer;
impl TestProtocolServer for DummyServer {
fn some_kind_of_question(&mut self, question: String) -> i32 {
question.len() as i32
}
fn addition(&mut self, arg0: i32, arg1: i32) -> i32 {
todo!()
}
}