sp-api: Make the generated code act based on std in sp-api (parit…

…ytech#14267)

* sp-api: Make the generated code act based on `std` in `sp-api`

Instead of letting the macro generate code that checks if the `std` feature is enabled, it will now
generate code that checks if the `std` feature is enabled for the `sp-api` crate. The old
implementation basically required that the crate in which the macro was used, had a `std` feature.
Now we don't have this requirement anymore and act accordingly the feature in `sp-api` directly.

* Missing feature!

---------

Co-authored-by: parity-processbot <>

frame/executive/Cargo.toml

@@ -42,6 +42,7 @@ std = [
  "codec/std",
  "frame-support/std",
  "frame-system/std",
+ "frame-try-runtime/std",
  "scale-info/std",
  "sp-core/std",
  "sp-io/std",

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

@@ -539,8 +539,6 @@ impl<'a> Fold for ToClientSideDecl<'a> {
  input.supertraits.push(parse_quote!( #crate_::Core<#block_ident> ));
  }
 
- // The client side trait is only required when compiling with the feature `std` or `test`.
- input.attrs.push(parse_quote!( #[cfg(any(feature = "std", test))] ));
  input.items = self.fold_item_trait_items(input.items, input.generics.params.len());
 
  fold::fold_item_trait(self, input)
@@ -584,12 +582,13 @@ fn generate_runtime_info_impl(trait_: &ItemTrait, version: u64) -> TokenStream {
  });
 
  quote!(
- #[cfg(any(feature = "std", test))]
- impl < #( #impl_generics, )* > #crate_::RuntimeApiInfo
- for dyn #trait_name < #( #ty_generics, )* >
- {
- #id
- #version
+ #crate_::std_enabled! {
+ impl < #( #impl_generics, )* > #crate_::RuntimeApiInfo
+ for dyn #trait_name < #( #ty_generics, )* >
+ {
+ #id
+ #version
+ }
  }
  )
 }
@@ -636,7 +635,11 @@ fn generate_client_side_decls(decls: &[ItemTrait]) -> Result<TokenStream> {
 
  let runtime_info = api_version.map(|v| generate_runtime_info_impl(&decl, v))?;
 
- result.push(quote!( #decl #runtime_info #( #errors )* ));
+ result.push(quote!(
+ #crate_::std_enabled! { #decl }
+ #runtime_info
+ #( #errors )*
+ ));
  }
 
  Ok(quote!( #( #result )* ))