mirror of https://github.com/rust-lang/rust
53 lines
1.6 KiB
Rust
53 lines
1.6 KiB
Rust
// Under the 2015 edition with the keyword_idents lint, `dyn` is
|
|
// not entirely acceptable as an identifier.
|
|
//
|
|
// We currently do not attempt to detect or fix uses of `dyn` as an
|
|
// identifier under a macro, including under the declarative `macro`
|
|
// forms from macros 1.2 and macros 2.0.
|
|
//
|
|
//@ check-pass
|
|
//@ edition:2015
|
|
|
|
#![feature(decl_macro)]
|
|
#![allow(non_camel_case_types)]
|
|
#![deny(keyword_idents)]
|
|
|
|
mod outer_mod {
|
|
pub mod r#dyn {
|
|
pub struct r#dyn;
|
|
}
|
|
}
|
|
|
|
// Here we are illustrating that the current lint does not flag the
|
|
// occurrences of `dyn` in this macro definition; however, it
|
|
// certainly *could* (and it would be nice if it did), since these
|
|
// occurrences are not compatible with the 2018 edition's
|
|
// interpretation of `dyn` as a keyword.
|
|
macro defn_has_dyn_idents() { ::outer_mod::dyn::dyn }
|
|
|
|
struct X;
|
|
trait Trait { fn hello(&self) { }}
|
|
impl Trait for X { }
|
|
|
|
macro tt_trait($arg:tt) { & $arg Trait }
|
|
macro id_trait($id:ident) { & $id Trait }
|
|
|
|
fn main() {
|
|
defn_has_dyn_idents!();
|
|
|
|
// Here we are illustrating that the current lint does not flag
|
|
// the occurrences of `dyn` in these macro invocations. It
|
|
// definitely should *not* flag the one in `tt_trait`, since that
|
|
// is expanding in a valid fashion to `&dyn Trait`.
|
|
//
|
|
// It is arguable whether it would be valid to flag the occurrence
|
|
// in `id_trait`, since that macro specifies that it takes an
|
|
// `ident` as its input.
|
|
fn f_tt(x: &X) -> tt_trait!(dyn) { x }
|
|
fn f_id(x: &X) -> id_trait!(dyn) { x }
|
|
|
|
let x = X;
|
|
f_tt(&x).hello();
|
|
f_id(&x).hello();
|
|
}
|