src/test/run-pass/issue-25700-2.rs

   1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 pub trait Parser {
  12     type Input;
  13 }
  14
  15 pub struct Iter<P: Parser>(P, P::Input);
  16
  17 pub struct Map<P, F>(P, F);
  18 impl<P, F> Parser for Map<P, F> where F: FnMut(P) {
  19     type Input = u8;
  20 }
  21
  22 trait AstId { type Untyped; }
  23 impl AstId for u32 { type Untyped = u32; }
  24
  25 fn record_type<Id: AstId>(i: Id::Untyped) -> u8 {
  26     Iter(Map(i, |_: Id::Untyped| {}), 42).1
  27 }
  28
  29 pub fn main() {
  30    assert_eq!(record_type::<u32>(3), 42);
  31 }