Change context api to panic with nice error message

packages/core/src/error_boundary.rs

@@ -1,5 +1,5 @@
 use crate::{
-    global_context::{consume_context, current_scope_id},
+    global_context::{current_scope_id, try_consume_context},
     innerlude::provide_context,
     use_hook, Element, IntoDynNode, Properties, ScopeId, Template, TemplateAttribute, TemplateNode,
     VNode,
@@ -202,7 +202,7 @@ pub trait Throw<S = ()>: Sized {
 }
 
 fn throw_error<T>(e: impl Debug + 'static) -> Option<T> {
-    if let Some(cx) = consume_context::<ErrorBoundary>() {
+    if let Some(cx) = try_consume_context::<ErrorBoundary>() {
         match current_scope_id() {
             Some(id) => cx.insert_error(id, Box::new(e), Backtrace::capture()),
             None => {

packages/core/src/global_context.rs

@@ -19,10 +19,17 @@ pub fn vdom_is_rendering() -> bool {
 }
 
 /// Consume context from the current scope
-pub fn consume_context<T: 'static + Clone>() -> Option<T> {
+pub fn try_consume_context<T: 'static + Clone>() -> Option<T> {
     with_current_scope(|cx| cx.consume_context::<T>()).flatten()
 }
 
+/// Consume context from the current scope
+pub fn consume_context<T: 'static + Clone>() -> T {
+    with_current_scope(|cx| cx.consume_context::<T>())
+        .flatten()
+        .unwrap_or_else(|| panic!("Could not find context {}", std::any::type_name::<T>(),))
+}
+
 /// Consume context from the current scope
 pub fn consume_context_from_scope<T: 'static + Clone>(scope_id: ScopeId) -> Option<T> {
     with_runtime(|rt| {

packages/core/src/lib.rs

@@ -88,8 +88,8 @@ pub mod prelude {
         consume_context, consume_context_from_scope, current_scope_id, fc_to_builder, generation,
         has_context, needs_update, parent_scope, provide_context, provide_root_context,
         push_future, remove_future, schedule_update, schedule_update_any, spawn, spawn_forever,
-        suspend, use_error_boundary, use_hook, AnyValue, Attribute, Component, Element,
-        ErrorBoundary, Event, EventHandler, Fragment, HasAttributes, IntoAttributeValue,
+        suspend, try_consume_context, use_error_boundary, use_hook, AnyValue, Attribute, Component,
+        Element, ErrorBoundary, Event, EventHandler, Fragment, HasAttributes, IntoAttributeValue,
         IntoDynNode, Properties, Runtime, RuntimeGuard, ScopeId, ScopeState, Task, Template,
         TemplateAttribute, TemplateNode, Throw, VNode, VNodeInner, VirtualDom,
     };

packages/core/src/scheduler/mod.rs

@@ -1,5 +1,4 @@
 use crate::ScopeId;
-use slab::Slab;
 
 mod task;
 mod wait;