[−][src]Function rustc::ty::context::tls::with_context_opt
pub fn with_context_opt<F, R>(f: F) -> R where
F: for<'a, 'gcx, 'tcx> FnOnce(Option<&ImplicitCtxt<'a, 'gcx, 'tcx>>) -> R,
🔬 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?
Allows access to the current ImplicitCtxt in a closure if one is available