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Merged
Madoshakalaka merged 4 commits into from
Jul 9, 2025
Merged

concise diagnostics for missing props #3873

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d84e9e6
concise diagnostics for missing props
Madoshakalaka Jul 6, 2025
ac43025
happy clippy
Madoshakalaka Jul 6, 2025
c273b4a
make fmt happy
Madoshakalaka Jul 6, 2025
f5f68d3
remove wrongly placed diagnostic attribute
Madoshakalaka Jul 6, 2025
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4 changes: 2 additions & 2 deletions .github/workflows/main-checks.yml
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Expand Up @@ -69,7 +69,7 @@ jobs:
fail-fast: false
matrix:
toolchain:
- 1.76.0
- 1.78.0
- stable

steps:
Expand Down Expand Up @@ -120,7 +120,7 @@ jobs:
fail-fast: false
matrix:
toolchain:
- 1.76.0
- 1.78.0
- stable
- nightly

Expand Down
2 changes: 1 addition & 1 deletion examples/wasi_ssr_module/src/main.rs
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Expand Up @@ -54,7 +54,7 @@ pub async fn render() -> Result<String> {
#[tokio::main(flavor = "current_thread")]
async fn main() -> Result<()> {
let ret = render().await?;
println!("{}", ret);
println!("{ret}");

Ok(())
}
2 changes: 1 addition & 1 deletion examples/web_worker_fib/src/lib.rs
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Expand Up @@ -29,7 +29,7 @@ fn Main() -> Html {
// start the worker
let output_value = fib_agent.run(input_value).await;

output.set(format!("Fibonacci value: {}", output_value));
output.set(format!("Fibonacci value: {output_value}"));
});
}
};
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2 changes: 1 addition & 1 deletion packages/yew-agent-macro/Cargo.toml
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Expand Up @@ -2,7 +2,7 @@
name = "yew-agent-macro"
version = "0.2.0"
edition = "2021"
rust-version = "1.76.0"
rust-version = "1.78.0"
authors = ["Kaede Hoshikawa <[email protected]>"]
repository = "https://github.com/yewstack/yew"
homepage = "https://yew.rs"
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2 changes: 1 addition & 1 deletion packages/yew-agent/Cargo.toml
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Expand Up @@ -9,7 +9,7 @@ edition = "2021"
readme = "../../README.md"
description = "Agents for Yew"
license = "MIT OR Apache-2.0"
rust-version = "1.76.0"
rust-version = "1.78.0"

[dependencies]
yew = { version = "0.21.0", path = "../yew" }
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2 changes: 1 addition & 1 deletion packages/yew-macro/Cargo.toml
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Expand Up @@ -10,7 +10,7 @@ license = "MIT OR Apache-2.0"
keywords = ["web", "wasm", "frontend", "webasm", "webassembly"]
categories = ["gui", "web-programming", "wasm"]
description = "A framework for making client-side single-page apps"
rust-version = "1.76.0"
rust-version = "1.78.0"

[lib]
proc-macro = true
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2 changes: 1 addition & 1 deletion packages/yew-macro/Makefile.toml
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@@ -1,6 +1,6 @@
[tasks.test]
clear = true
toolchain = "1.76.0"
toolchain = "1.78.0"
command = "cargo"
# test target can be optionally specified like `cargo make test html_macro`,
args = ["test", "${@}"]
Expand Down
2 changes: 2 additions & 0 deletions packages/yew-macro/src/derive_props/builder.rs
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Expand Up @@ -142,11 +142,13 @@ impl PropsBuilder<'_> {
#vis struct #check_all_props_name<How>(::std::marker::PhantomData<How>);

#[automatically_derived]
#[diagnostic::do_not_recommend]
impl<B, P, How> ::yew::html::HasProp<P, &dyn ::yew::html::HasProp<P, How>>
for #check_all_props_name<B>
where B: ::yew::html::HasProp<P, How> {}

#[automatically_derived]
#[diagnostic::do_not_recommend]
impl #check_impl_generics ::yew::html::HasAllProps<
#props_name #ty_generics ,
( #( #check_args , )* ),
Expand Down
3 changes: 3 additions & 0 deletions packages/yew-macro/src/derive_props/field.rs
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Expand Up @@ -245,9 +245,12 @@ impl PropFieldCheck<'_> {
#vis struct #check_struct<How>(::std::marker::PhantomData<How>);

#[automatically_derived]
#[diagnostic::do_not_recommend]
impl<B> ::yew::html::HasProp< #prop_name_mod :: #prop_check_name, #check_struct<B>>
for #check_struct<B> {}

#[automatically_derived]
#[diagnostic::do_not_recommend]
impl<B, P, How> ::yew::html::HasProp<P, &dyn ::yew::html::HasProp<P, How>>
for #check_struct<B>
where B: ::yew::html::HasProp<P, How> {}
Expand Down
24 changes: 12 additions & 12 deletions packages/yew-macro/tests/classes_macro/classes-fail.stderr
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Expand Up @@ -14,11 +14,11 @@ error[E0277]: the trait bound `Classes: From<{integer}>` is not satisfied
--> tests/classes_macro/classes-fail.rs:4:14
|
4 | classes!(42);
| ^^ the trait `From<{integer}>` is not implemented for `Classes`
| ^^ the trait `From<{integer}>` is not implemented for `Classes`, which is required by `{integer}: Into<Classes>`
|
= help: the following other types implement trait `From<T>`:
<Classes as From<Cow<'static, str>>>
<Classes as From<implicit_clone::unsync::string::IString>>
<Classes as From<Cow<'static, str>>>
<Classes as From<Vec<T>>>
<Classes as From<String>>
<Classes as From<Option<T>>>
Expand All @@ -37,11 +37,11 @@ error[E0277]: the trait bound `Classes: From<{float}>` is not satisfied
--> tests/classes_macro/classes-fail.rs:5:14
|
5 | classes!(42.0);
| ^^^^ the trait `From<{float}>` is not implemented for `Classes`
| ^^^^ the trait `From<{float}>` is not implemented for `Classes`, which is required by `{float}: Into<Classes>`
|
= help: the following other types implement trait `From<T>`:
<Classes as From<Cow<'static, str>>>
<Classes as From<implicit_clone::unsync::string::IString>>
<Classes as From<Cow<'static, str>>>
<Classes as From<Vec<T>>>
<Classes as From<String>>
<Classes as From<Option<T>>>
Expand All @@ -62,12 +62,12 @@ error[E0277]: the trait bound `Classes: From<{integer}>` is not satisfied
9 | classes!(vec![42]);
| ---^^^^^
| |
| the trait `From<{integer}>` is not implemented for `Classes`
| the trait `From<{integer}>` is not implemented for `Classes`, which is required by `Vec<{integer}>: Into<Classes>`
| required by a bound introduced by this call
|
= help: the following other types implement trait `From<T>`:
<Classes as From<Cow<'static, str>>>
<Classes as From<implicit_clone::unsync::string::IString>>
<Classes as From<Cow<'static, str>>>
<Classes as From<Vec<T>>>
<Classes as From<String>>
<Classes as From<Option<T>>>
Expand All @@ -89,11 +89,11 @@ error[E0277]: the trait bound `Classes: From<{integer}>` is not satisfied
--> tests/classes_macro/classes-fail.rs:13:14
|
13 | classes!(some);
| ^^^^ the trait `From<{integer}>` is not implemented for `Classes`
| ^^^^ the trait `From<{integer}>` is not implemented for `Classes`, which is required by `Option<{integer}>: Into<Classes>`
|
= help: the following other types implement trait `From<T>`:
<Classes as From<Cow<'static, str>>>
<Classes as From<implicit_clone::unsync::string::IString>>
<Classes as From<Cow<'static, str>>>
<Classes as From<Vec<T>>>
<Classes as From<String>>
<Classes as From<Option<T>>>
Expand All @@ -115,11 +115,11 @@ error[E0277]: the trait bound `Classes: From<u32>` is not satisfied
--> tests/classes_macro/classes-fail.rs:14:14
|
14 | classes!(none);
| ^^^^ the trait `From<u32>` is not implemented for `Classes`
| ^^^^ the trait `From<u32>` is not implemented for `Classes`, which is required by `Option<u32>: Into<Classes>`
|
= help: the following other types implement trait `From<T>`:
<Classes as From<Cow<'static, str>>>
<Classes as From<implicit_clone::unsync::string::IString>>
<Classes as From<Cow<'static, str>>>
<Classes as From<Vec<T>>>
<Classes as From<String>>
<Classes as From<Option<T>>>
Expand All @@ -141,11 +141,11 @@ error[E0277]: the trait bound `Classes: From<{integer}>` is not satisfied
--> tests/classes_macro/classes-fail.rs:16:21
|
16 | classes!("one", 42);
| ^^ the trait `From<{integer}>` is not implemented for `Classes`
| ^^ the trait `From<{integer}>` is not implemented for `Classes`, which is required by `{integer}: Into<Classes>`
|
= help: the following other types implement trait `From<T>`:
<Classes as From<Cow<'static, str>>>
<Classes as From<implicit_clone::unsync::string::IString>>
<Classes as From<Cow<'static, str>>>
<Classes as From<Vec<T>>>
<Classes as From<String>>
<Classes as From<Option<T>>>
Expand Down
2 changes: 1 addition & 1 deletion packages/yew-macro/tests/classes_macro_test.rs
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@@ -1,5 +1,5 @@
#[allow(dead_code)]
#[rustversion::attr(stable(1.76), test)]
#[rustversion::attr(stable(1.78), test)]
fn classes_macro() {
let t = trybuild::TestCases::new();
t.pass("tests/classes_macro/*-pass.rs");
Expand Down
42 changes: 16 additions & 26 deletions packages/yew-macro/tests/derive_props/fail.stderr
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Expand Up @@ -61,22 +61,13 @@ help: consider annotating `Value` with `#[derive(PartialEq)]`
9 | struct Value;
|

error[E0277]: the trait bound `AssertAllProps: HasProp<t3::_Props::value, _>` is not satisfied
error[E0277]: not all required properties have been provided
--> tests/derive_props/fail.rs:35:24
|
35 | ::yew::props!{ Props { } };
| ^^^^^ the trait `HasProp<t3::_Props::value, _>` is not implemented for `AssertAllProps`
|
= help: the following other types implement trait `HasProp<P, How>`:
<t1::CheckPropsAll<B> as HasProp<P, &dyn HasProp<P, How>>>
<t2::HasPropsvalue<B> as HasProp<t2::_Props::value, t2::HasPropsvalue<B>>>
<t2::HasPropsvalue<B> as HasProp<P, &dyn HasProp<P, How>>>
<t2::CheckPropsAll<B> as HasProp<P, &dyn HasProp<P, How>>>
<t3::HasPropsvalue<B> as HasProp<t3::_Props::value, t3::HasPropsvalue<B>>>
<t3::HasPropsvalue<B> as HasProp<P, &dyn HasProp<P, How>>>
<t3::CheckPropsAll<B> as HasProp<P, &dyn HasProp<P, How>>>
<t4::HasPropsvalue<B> as HasProp<t4::_Props::value, t4::HasPropsvalue<B>>>
and $N others
| ^^^^^ missing required properties for this component
|
= help: the trait `HasProp<t3::_Props::value, _>` is not implemented for `AssertAllProps`, which is required by `AssertAllProps: AllPropsFor<t3::PropsBuilder, _>`
note: required for `t3::CheckPropsAll<AssertAllProps>` to implement `HasAllProps<t3::Props, (_,)>`
--> tests/derive_props/fail.rs:29:21
|
Expand All @@ -93,22 +84,13 @@ note: required by a bound in `html::component::properties::__macro::PreBuild::<T
| ^^^^^^^^^^^^^^^^^^^ required by this bound in `PreBuild::<Token, B>::build`
= note: this error originates in the derive macro `Properties` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the trait bound `AssertAllProps: HasProp<t4::_Props::value, _>` is not satisfied
error[E0277]: not all required properties have been provided
--> tests/derive_props/fail.rs:47:24
|
47 | ::yew::props!{ Props { } };
| ^^^^^ the trait `HasProp<t4::_Props::value, _>` is not implemented for `AssertAllProps`
|
= help: the following other types implement trait `HasProp<P, How>`:
<t1::CheckPropsAll<B> as HasProp<P, &dyn HasProp<P, How>>>
<t2::HasPropsvalue<B> as HasProp<t2::_Props::value, t2::HasPropsvalue<B>>>
<t2::HasPropsvalue<B> as HasProp<P, &dyn HasProp<P, How>>>
<t2::CheckPropsAll<B> as HasProp<P, &dyn HasProp<P, How>>>
<t3::HasPropsvalue<B> as HasProp<t3::_Props::value, t3::HasPropsvalue<B>>>
<t3::HasPropsvalue<B> as HasProp<P, &dyn HasProp<P, How>>>
<t3::CheckPropsAll<B> as HasProp<P, &dyn HasProp<P, How>>>
<t4::HasPropsvalue<B> as HasProp<t4::_Props::value, t4::HasPropsvalue<B>>>
and $N others
| ^^^^^ missing required properties for this component
|
= help: the trait `HasProp<t4::_Props::value, _>` is not implemented for `AssertAllProps`, which is required by `AssertAllProps: AllPropsFor<t4::PropsBuilder, _>`
note: required for `t4::CheckPropsAll<AssertAllProps>` to implement `HasAllProps<t4::Props, (_,)>`
--> tests/derive_props/fail.rs:41:21
|
Expand Down Expand Up @@ -168,3 +150,11 @@ error[E0271]: expected `foo` to be a fn item that returns `String`, but it retur
|
note: required by a bound in `Option::<T>::unwrap_or_else`
--> $RUST/core/src/option.rs

warning: unused variable: `bar`
--> tests/derive_props/fail.rs:100:12
|
100 | fn foo(bar: i32) -> String {
| ^^^ help: if this is intentional, prefix it with an underscore: `_bar`
|
= note: `#[warn(unused_variables)]` on by default
1 change: 0 additions & 1 deletion packages/yew-macro/tests/derive_props/pass.rs
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@@ -1,4 +1,3 @@
#![no_implicit_prelude]
#![recursion_limit = "128"]

// Shadow primitives
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2 changes: 1 addition & 1 deletion packages/yew-macro/tests/derive_props_test.rs
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@@ -1,5 +1,5 @@
#[allow(dead_code)]
#[rustversion::attr(stable(1.76), test)]
#[rustversion::attr(stable(1.78), test)]
fn derive_props() {
let t = trybuild::TestCases::new();
t.pass("tests/derive_props/pass.rs");
Expand Down
2 changes: 1 addition & 1 deletion packages/yew-macro/tests/function_attr_test.rs
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@@ -1,5 +1,5 @@
#[allow(dead_code)]
#[rustversion::attr(stable(1.76), test)]
#[rustversion::attr(stable(1.78), test)]
fn tests() {
let t = trybuild::TestCases::new();
t.pass("tests/function_component_attr/*-pass.rs");
Expand Down
1 change: 0 additions & 1 deletion packages/yew-macro/tests/function_component_attr/generic-pass.rs
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@@ -1,4 +1,3 @@
#![no_implicit_prelude]

// Shadow primitives
#[allow(non_camel_case_types)]
Expand Down
22 changes: 9 additions & 13 deletions packages/yew-macro/tests/function_component_attr/generic-props-fail.stderr
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Expand Up @@ -9,22 +9,13 @@ help: you might be missing a type parameter
20 | fn compile_fail<INVALID>() {
| +++++++++

error[E0277]: the trait bound `AssertAllProps: HasProp<a, _>` is not satisfied
error[E0277]: not all required properties have been provided
--> tests/function_component_attr/generic-props-fail.rs:22:14
|
22 | html! { <Comp<Props> /> };
| ^^^^ the trait `HasProp<a, _>` is not implemented for `AssertAllProps`
|
= help: the following other types implement trait `HasProp<P, How>`:
<HasPropsa<B> as HasProp<a, HasPropsa<B>>>
<HasPropsa<B> as HasProp<P, &dyn HasProp<P, How>>>
<CheckPropsAll<B> as HasProp<P, &dyn HasProp<P, How>>>
<HasContextProviderPropscontext<B> as HasProp<yew::context::_ContextProviderProps::context, HasContextProviderPropscontext<B>>>
<HasContextProviderPropscontext<B> as HasProp<P, &dyn HasProp<P, How>>>
<HasContextProviderPropschildren<B> as HasProp<children, HasContextProviderPropschildren<B>>>
<HasContextProviderPropschildren<B> as HasProp<P, &dyn HasProp<P, How>>>
<CheckContextProviderPropsAll<B> as HasProp<P, &dyn HasProp<P, How>>>
and $N others
| ^^^^ missing required properties for this component
|
= help: the trait `HasProp<a, _>` is not implemented for `AssertAllProps`, which is required by `AssertAllProps: AllPropsFor<PropsBuilder, _>`
note: required for `CheckPropsAll<AssertAllProps>` to implement `HasAllProps<Props, (_,)>`
--> tests/function_component_attr/generic-props-fail.rs:3:17
|
Expand Down Expand Up @@ -80,6 +71,11 @@ error[E0599]: the function or associated item `new` exists for struct `VChild<Co
27 | html! { <Comp<MissingTypeBounds> /> };
| ^^^^ function or associated item cannot be called on `VChild<Comp<MissingTypeBounds>>` due to unsatisfied trait bounds
|
note: if you're trying to build a new `VChild<Comp<MissingTypeBounds>>`, consider using `VChild::<COMP>::new` which returns `VChild<_>`
--> $WORKSPACE/packages/yew/src/virtual_dom/vcomp.rs
|
| pub fn new(props: COMP::Properties, key: Option<Key>) -> Self {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: the following trait bounds were not satisfied:
`Comp<MissingTypeBounds>: yew::BaseComponent`
note: the trait `yew::BaseComponent` must be implemented
Expand Down
1 change: 0 additions & 1 deletion packages/yew-macro/tests/function_component_attr/hook_location-pass.rs
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@@ -1,4 +1,3 @@
#![no_implicit_prelude]

#[derive(
::std::prelude::rust_2021::Debug,
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1 change: 0 additions & 1 deletion packages/yew-macro/tests/function_component_attr/no-name-default-pass.rs
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@@ -1,4 +1,3 @@
#![no_implicit_prelude]

#[derive(::yew::prelude::Properties, ::std::prelude::rust_2021::PartialEq,)]
struct Props {
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1 change: 0 additions & 1 deletion packages/yew-macro/tests/function_component_attr/with-defaulted-type-param-pass.rs
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#![no_implicit_prelude]
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@Madoshakalaka Madoshakalaka Jul 6, 2025 •
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I removed these from the tests that have #[derive(Properties)] because it prevents #[diagnostics] from being used. I have no clue how to qualify diagnostics with no_implicit_prelude. If anybody can help it's very appreciated.

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@Madoshakalaka Madoshakalaka Jul 6, 2025

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Hmm.. I think it's impossible to use no_implicit_prelude together with diagnostic

https://doc.rust-lang.org/reference/attributes.html#r-attributes.tool.prelude

Tool attributes are not available if the no_implicit_prelude attribute is used.

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@Madoshakalaka Madoshakalaka Jul 8, 2025

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I think no_implicit_prelude was introduced to improve hygiene, it ensures our macros don't accidentally collide with rust's built-in ones, which could cause false passes in macro tests.

Sadly there seems to be no way around it for now and diagnostic improvements seem worth it.


#[derive(::yew::prelude::Properties, ::std::fmt::Debug)]
pub struct CompProps<A> {
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2 changes: 0 additions & 2 deletions packages/yew-macro/tests/function_component_attr/with-props-pass.rs
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@@ -1,5 +1,3 @@
#![no_implicit_prelude]

// Shadow primitives
#[allow(non_camel_case_types)]
pub struct bool;
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2 changes: 1 addition & 1 deletion packages/yew-macro/tests/hook_attr_test.rs
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@@ -1,5 +1,5 @@
#[allow(dead_code)]
#[rustversion::attr(stable(1.76), test)]
#[rustversion::attr(stable(1.78), test)]
fn tests() {
let t = trybuild::TestCases::new();
t.pass("tests/hook_attr/*-pass.rs");
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2 changes: 1 addition & 1 deletion packages/yew-macro/tests/hook_macro_test.rs
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@@ -1,5 +1,5 @@
#[allow(dead_code)]
#[rustversion::attr(stable(1.76), test)]
#[rustversion::attr(stable(1.78), test)]
fn tests() {
let t = trybuild::TestCases::new();
t.pass("tests/hook_macro/*-pass.rs");
Expand Down
12 changes: 4 additions & 8 deletions packages/yew-macro/tests/html_macro/block-fail.stderr
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@@ -1,28 +1,24 @@
error[E0277]: `()` doesn't implement `std::fmt::Display`
error[E0277]: the trait bound `(): Into<NodeSeq<(), VNode>>` is not satisfied
--> tests/html_macro/block-fail.rs:6:15
|
6 | { () }
| ^^
| |
| `()` cannot be formatted with the default formatter
| the trait `std::fmt::Display` is not implemented for `()`, which is required by `(): Into<NodeSeq<_, _>>`
| required by a bound introduced by this call
|
= help: the trait `std::fmt::Display` is not implemented for `()`
= note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
= note: required for `()` to implement `ToString`
= note: required for `VNode` to implement `From<()>`
= note: required for `()` to implement `Into<VNode>`
= note: 2 redundant requirements hidden
= note: required for `()` to implement `Into<NodeSeq<(), VNode>>`

error[E0277]: `()` doesn't implement `std::fmt::Display`
error[E0277]: the trait bound `(): Into<VNode>` is not satisfied
--> tests/html_macro/block-fail.rs:15:17
|
15 | <>{ for (0..3).map(|_| not_tree()) }</>
| ^^^^^^ `()` cannot be formatted with the default formatter
| ^^^^^^ the trait `std::fmt::Display` is not implemented for `()`, which is required by `(): Into<_>`
|
= help: the trait `std::fmt::Display` is not implemented for `()`
= note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
= note: required for `()` to implement `ToString`
= note: required for `VNode` to implement `From<()>`
= note: required for `()` to implement `Into<VNode>`
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2 changes: 0 additions & 2 deletions packages/yew-macro/tests/html_macro/component-any-children-pass.rs
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#![no_implicit_prelude]

// Shadow primitives
#[allow(non_camel_case_types)]
pub struct bool;
Expand Down
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