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sp-api: Support expanding the macro code (#13573)

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* sp-api: Support expanding the macro code

This pr introduces the `expander` crate to expand the generated source code into a file. This gives
better error reporting when trying to fix issues in the macro itself as Rustc will point to the line
in this file. The feature can be enabled by setting `SP_API_EXPAND=1` at compile time.

Besides that the generated code is changed to fix warnings in the exanped version.

* Fixes
This commit is contained in:
Bastian Köcher
2023-03-14 22:14:58 +01:00
committed by GitHub
parent ef165cec3e
commit 4ef1d0df02
9 changed files with 124 additions and 101 deletions
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substrate/primitives/api/proc-macro/src/common.rs
-3
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@@ -18,9 +18,6 @@
/// The ident used for the block generic parameter.
pub const BLOCK_GENERIC_IDENT: &str = "Block";
/// Unique identifier used to make the hidden includes unique for this macro.
pub const HIDDEN_INCLUDES_ID: &str = "DECL_RUNTIME_APIS";
/// The `core_trait` attribute.
pub const CORE_TRAIT_ATTRIBUTE: &str = "core_trait";
/// The `api_version` attribute.