| // Copyright 2015 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // normalize-stderr-test: "<\[closure@.+`" -> "$$CLOSURE`" |
| |
| #![allow(unused)] |
| |
| #![recursion_limit = "20"] |
| #![type_length_limit = "20000000"] |
| #![crate_type = "rlib"] |
| |
| #[derive(Clone)] |
| struct A (B); |
| |
| impl A { |
| pub fn matches<F: Fn()>(&self, f: &F) { |
| let &A(ref term) = self; |
| term.matches(f); |
| } |
| } |
| |
| #[derive(Clone)] |
| enum B { |
| Variant1, |
| Variant2(C), |
| } |
| |
| impl B { |
| pub fn matches<F: Fn()>(&self, f: &F) { |
| match self { |
| &B::Variant2(ref factor) => { |
| factor.matches(&|| ()) |
| } |
| _ => unreachable!("") |
| } |
| } |
| } |
| |
| #[derive(Clone)] |
| struct C (D); |
| |
| impl C { |
| pub fn matches<F: Fn()>(&self, f: &F) { |
| let &C(ref base) = self; |
| base.matches(&|| { |
| C(base.clone()).matches(f) |
| }) |
| } |
| } |
| |
| #[derive(Clone)] |
| struct D (Box<A>); |
| |
| impl D { |
| pub fn matches<F: Fn()>(&self, f: &F) { |
| //~^ ERROR reached the type-length limit while instantiating `D::matches::<[closure |
| let &D(ref a) = self; |
| a.matches(f) |
| } |
| } |
| |
| pub fn matches() { |
| A(B::Variant1).matches(&(|| ())) |
| } |