Better message for component prop label validation

Author: kirillsemyonkin

packages/yew-macro/src/props/component.rs

@@ -194,7 +194,7 @@ fn validate(props: Props) -> Result<Props, syn::Error> {
         PropLabel::Static(dashed_name) if dashed_name.extended.is_empty() => Ok(()),
         _ => Err(syn::Error::new_spanned(
             &prop.label,
-            "expected a valid Rust identifier",
+            "components expect valid Rust identifiers for their property names",
         )),
     })?;
 

packages/yew-macro/tests/html_macro/component-fail.stderr

@@ -259,7 +259,7 @@ error: the property value must be either a literal or enclosed in braces. Consid
 86 |     html! { <Child ref=() /> };
    |                        ^^
 
-error: expected a valid Rust identifier
+error: components expect valid Rust identifiers for their property names
   --> tests/html_macro/component-fail.rs:87:20
    |
 87 |     html! { <Child invalid-prop-name=0 /> };

packages/yew-macro/tests/html_macro/dyn-prop-fail.stderr

@@ -1,22 +1,22 @@
-error: expected a valid Rust identifier
+error: components expect valid Rust identifiers for their property names
   --> tests/html_macro/dyn-prop-fail.rs:66:32
    |
 66 |     _ = ::yew::html! { <Simple "test"="" /> };
    |                                ^^^^^^
 
-error: expected a valid Rust identifier
+error: components expect valid Rust identifiers for their property names
   --> tests/html_macro/dyn-prop-fail.rs:67:32
    |
 67 |     _ = ::yew::html! { <Simple "test"={ "" } /> };
    |                                ^^^^^^
 
-error: expected a valid Rust identifier
+error: components expect valid Rust identifiers for their property names
   --> tests/html_macro/dyn-prop-fail.rs:68:34
    |
 68 |     _ = ::yew::html! { <Simple { "test" }={ "" } /> };
    |                                  ^^^^^^
 
-error: expected a valid Rust identifier
+error: components expect valid Rust identifiers for their property names
   --> tests/html_macro/dyn-prop-fail.rs:69:34
    |
 69 |     _ = ::yew::html! { <Simple { dyn_prop() }={ "" } /> };