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Remove serde requirement from FRAME macros (#8628)

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* Remove `serde` requirement from FRAME macros

Currently there is some implicit requirement on `serde` being present in
the `Cargo.toml` of a pallet when `GenesisConfig` is used. This pr
removes this requirement by using the serde attribute `serde(crate = "..")`.

* build a unique reexport of serde in impl_opaque_keys, by abusing paste doc concatenation

* Optimize

Co-authored-by: thiolliere <gui.thiolliere@gmail.com>
This commit is contained in:
Bastian Köcher
2021-04-16 12:42:37 +02:00
committed by GitHub
parent 7527bd758c
commit c8136bd1df
43 changed files with 29 additions and 128 deletions
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substrate/frame/support/procedural/src/pallet/expand/genesis_config.rs
+3
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@@ -29,6 +29,8 @@ pub fn expand_genesis_config(def: &mut Def) -> proc_macro2::TokenStream {
let genesis_config_item = &mut def.item.content.as_mut()
.expect("Checked by def parser").1[genesis_config.index];
let serde_crate = format!("{}::serde", frame_support);
match genesis_config_item {
syn::Item::Enum(syn::ItemEnum { attrs, ..}) |
syn::Item::Struct(syn::ItemStruct { attrs, .. }) |
@@ -50,6 +52,7 @@ pub fn expand_genesis_config(def: &mut Def) -> proc_macro2::TokenStream {
attrs.push(syn::parse_quote!( #[serde(deny_unknown_fields)] ));
attrs.push(syn::parse_quote!( #[serde(bound(serialize = ""))] ));
attrs.push(syn::parse_quote!( #[serde(bound(deserialize = ""))] ));
attrs.push(syn::parse_quote!( #[serde(crate = #serde_crate)] ));
},
_ => unreachable!("Checked by genesis_config parser"),
}