sp-debug-derive

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lib.rs:

Macros to derive runtime debug implementation.

This custom derive implements a core::fmt::Debug trait, but in case the std feature is enabled the implementation will actually print out the structure as regular derive(Debug) would do. If std is disabled the implementation will be empty.

This behaviour is useful to prevent bloating the runtime WASM blob from unneeded code.

#[derive(sp_debug_derive::RuntimeDebug)]
struct MyStruct;

assert_eq!(format!("{:?}", MyStruct), "MyStruct");