Initial commit

.gitignore

@@ -0,0 +1 @@
+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "id"
+version = "0.1.0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.78"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2422ad645d89c99f8f3e6b88a9fdeca7fabeac836b1002371c4367c8f984aae"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.48"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f3531638e407dfc0814761abb7c00a5b54992b849452a0646b7f65c9f770f3f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"

Cargo.toml

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+[package]
+name = "id"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc_macro=true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+proc-macro2 = "1.0.78"
+quote = "1.0.35"
+syn = "2.0.48"

src/lib.rs

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+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+use quote::quote;
+use syn::{parse_macro_input, DeriveInput};
+
+#[proc_macro_derive(Id)]
+pub fn id_derive(input: TokenStream) -> TokenStream {
+    // Parse the input tokens into a syntax tree
+    let ast = parse_macro_input!(input as DeriveInput);
+    let name = &ast.ident;
+
+    // Generate the code for the implementation
+    let expanded = quote! {
+        impl #name {
+            #[inline]
+            pub const fn new(id: u32) -> Self {
+                Self(id)
+            }
+
+            #[inline]
+            pub const fn get(self) -> u32 {
+                self.0
+            }
+        }
+    };
+
+    // Convert the generated code into a token stream and return it
+    TokenStream::from(expanded)
+}