Feat: finally solve the component lifetime problem <3

.vscode/settings.json

@@ -1,3 +1,3 @@
 {
-    "rust-analyzer.inlayHints.enable": true
+    "rust-analyzer.inlayHints.enable": false
 }

packages/core/examples/alternative.rs

@@ -9,13 +9,18 @@ use dioxus_core::prelude::{DomTree, VNode};
 fn main() {}
 
 struct Context2<'a, P> {
-    props: &'a P, // _p: PhantomData<&'a ()>,
+    _props: &'a P, // _p: PhantomData<&'a ()>,
+    rops: &'a P,   // _p: PhantomData<&'a ()>,
 }
 impl<'a, P> Context2<'a, P> {
-    fn view(&self, f: impl FnOnce(&'a Bump) -> VNode<'a>) -> DTree {
+    fn view(self, f: impl FnOnce(&'a Bump) -> VNode<'a>) -> DTree {
         DTree {}
     }
 
+    fn props(&self) -> &'a P {
+        todo!()
+    }
+
     pub fn use_hook<'scope, InternalHookState: 'static, Output: 'a>(
         &'scope self,
         initializer: impl FnOnce() -> InternalHookState,
@@ -26,45 +31,64 @@ impl<'a, P> Context2<'a, P> {
     }
 }
 
+trait Properties {}
+
 struct DTree;
-type FC2<'a, T: 'a> = fn(&'a Context2<T>) -> DTree;
+// type FC2<'a, T: 'a> = fn(Context2<T>) -> DTree;
+fn virtual_child<'a, T: 'a>(bump: &'a Bump, props: T, f: FC2<T>) -> VNode<'a> {
+    todo!()
+}
 
 struct Props {
     c: String,
 }
 
-static Example: FC2<Props> = |ctx| {
+fn Example(ctx: Context2<Props>) -> DTree {
+    let val = use_state(&ctx, || String::from("asd"));
+    let props = ctx.props();
+
+    ctx.view(move |b| {
+        dioxus_core::nodebuilder::div(b)
+            .child(dioxus_core::nodebuilder::text(props.c.as_str()))
+            .child(virtual_child(b, Props2 { a: val }, AltChild))
+            .finish()
+    })
+}
+
+// #[fc]
+fn Example2(ctx: Context2<()>, name: &str, blah: &str) -> DTree {
     let val = use_state(&ctx, || String::from("asd"));
 
     ctx.view(move |b| {
-        let g: VNode<'_> = virtual_child(b, Props2 { a: val }, alt_child);
-        //
         dioxus_core::nodebuilder::div(b)
-            .child(dioxus_core::nodebuilder::text(ctx.props.c.as_str()))
-            .child(g)
+            .child(dioxus_core::nodebuilder::text(name))
+            .child(virtual_child(b, Props2 { a: val }, AltChild))
             .finish()
     })
-};
-
-fn virtual_child<'a, T: 'a>(bump: &'a Bump, props: T, f: FC2<T>) -> VNode<'a> {
-    todo!()
 }
 
-struct Props2<'a> {
-    a: &'a String,
-}
+type FC2<'a, T: 'a> = fn(Context2<T>) -> DTree;
 
-fn alt_child<'a>(ctx: &Context2<'a, Props2<'_>>) -> DomTree {
-    todo!()
-}
-
-static CHILD: FC2<Props2> = |ctx| {
+// still works if you don't take any references in your props (ie, something copy or cloneable)
+static CHILD: FC2<Props2> = |ctx: Context2<Props2>| {
     //
     todo!()
 };
 
+struct Props2<'a> {
+    a: &'a String,
+}
+impl Properties for Props2<'_> {}
+
+fn AltChild(ctx: Context2<Props2>) -> DTree {
+    ctx.view(|b| {
+        //
+        todo!()
+    })
+}
+
 fn use_state<'a, 'c, P, T: 'static, F: FnOnce() -> T>(
-    ctx: &'a Context2<'a, P>,
+    ctx: &'_ Context2<'a, P>,
     initial_state_fn: F,
 ) -> (&'a T) {
     todo!()

packages/core/examples/borrowed.rs

@@ -0,0 +1,39 @@
+//! Demonstrate that borrowed data is possible as a property type
+//! Borrowing (rather than cloning) is very important for speed and ergonomics.
+
+fn main() {}
+
+use dioxus_core::prelude::*;
+
+struct Props {
+    items: Vec<ListItem>,
+}
+
+struct ListItem {
+    name: String,
+    age: u32,
+}
+
+fn app(ctx: Context, props: &Props) -> DomTree {
+    ctx.view(move |b| {
+        let mut root = builder::div(b);
+        for child in &props.items {
+            // notice that the child directly borrows from our vec
+            // this makes lists very fast (simply views reusing lifetimes)
+            root = root.child(builder::virtual_child(
+                b,
+                ChildProps { item: child },
+                child_item,
+            ));
+        }
+        root.finish()
+    })
+}
+
+struct ChildProps<'a> {
+    item: &'a ListItem,
+}
+
+fn child_item(ctx: Context, props: &ChildProps) -> DomTree {
+    todo!()
+}

packages/core/src/context.rs

@@ -41,6 +41,10 @@ pub struct Context<'src> {
 }
 
 impl<'a> Context<'a> {
+    pub fn props<P>() -> &'a P {
+        todo!()
+    }
+
     // impl<'a, PropType> Context<'a, PropType> {
     /// Access the children elements passed into the component
     pub fn children(&self) -> Vec<VNode> {