Create macros crate

Cargo.toml

@@ -6,6 +6,12 @@ license = "MIT OR Apache-2.0"
 description = "Cross-platform UI framework"
 repository = "https://github.com/concoct-rs/viewbuilder"
 
+[workspace]
+members = [
+    ".",
+    "macros"
+]
+
 [features]
 gl = [
     "dep:gl",
@@ -18,6 +24,7 @@ gl = [
 default = ["gl"]
 
 [dependencies]
+viewbuilder-macros = { path = "macros" }
 accesskit = "0.11.2"
 kurbo = "0.9.5"
 slotmap = "1.0.6"

examples/ui.rs

@@ -1,21 +1,23 @@
 use std::cell::RefCell;
 use viewbuilder::ui::{Scope, View};
+use viewbuilder::view;
 
-fn app<'cx>(cx: &'cx Scope) -> View<'cx> {
-    cx.enter((), || {
-        let count = cx.use_hook(|| RefCell::new(0));
+#[view]
+fn app(cx: &Scope) -> View {
+    let count = cx.use_hook(|| RefCell::new(0));
 
-        View::default()
-            .text(count.borrow().to_string())
-            .view(View::default().text("Less!").on_click(|| {
-                dbg!(count.borrow());
-                *count.borrow_mut() -= 1;
-            }))
-            .view(View::default().text("More!").on_click(|| {
-                dbg!(count.borrow());
-                *count.borrow_mut() += 1;
-            }))
-    })
+    View::default()
+        .text(count.borrow().to_string())
+        .view(
+            View::default()
+                .text("Less!")
+                .on_click(|| *count.borrow_mut() -= 1),
+        )
+        .view(
+            View::default()
+                .text("More!")
+                .on_click(|| *count.borrow_mut() += 1),
+        )
 }
 
 fn main() -> Result<(), viewbuilder::Error> {

macros/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "viewbuilder-macros"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+quote = "1.0.33"
+syn = { version = "2.0.37", features = ["full"] }

macros/src/lib.rs

@@ -0,0 +1,18 @@
+use proc_macro::TokenStream;
+use quote::ToTokens;
+use syn::{parse_macro_input, parse_quote, ItemFn};
+
+#[proc_macro_attribute]
+pub fn view(_args: TokenStream, input: TokenStream) -> TokenStream {
+    // Parse the input function as an ItemFn
+    let mut input = parse_macro_input!(input as ItemFn);
+
+    let block = input.block.clone();
+    input.block = parse_quote!({
+        cx.enter((), || {
+            #block
+        })
+    });
+
+    input.into_token_stream().into()
+}

src/lib.rs

@@ -17,7 +17,8 @@
 //!         .build(cx)
 //! }
 //! ```
-//!
+
+pub use viewbuilder_macros::view;
 
 use thiserror::Error;