Function syntax_ext::deriving::generic::combine_substructure [] [src]

pub fn combine_substructure<'a>(
    f: CombineSubstructureFunc<'a>
) -> RefCell<CombineSubstructureFunc<'a>>
🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?