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Make decl_runtime_apis! fail on methods with default implementation (#7371)

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* Make `decl_runtime_apis!` fail on methods with default implementation

Runtime api functions are not allowed to have default implementations.
This fixes this by throwing an error when we detect such a function.

* Update primitives/api/proc-macro/src/decl_runtime_apis.rs

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>

* Update primitives/api/test/tests/ui/no_default_implementation.stderr

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>
This commit is contained in:
Bastian Köcher
2020-10-21 23:50:07 +02:00
committed by GitHub
parent 96e939f42e
commit f450a6d74c
3 changed files with 24 additions and 0 deletions
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substrate/primitives/api/proc-macro/src/decl_runtime_apis.rs
+7
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@@ -912,6 +912,13 @@ impl CheckTraitDecl {
.entry(method.sig.ident.clone())
.or_default()
.push(changed_in);
if method.default.is_some() {
self.errors.push(Error::new(
method.default.span(),
"A runtime API function cannot have a default implementation!",
));
}
});
method_to_signature_changed.into_iter().for_each(|(f, changed)| {