rust/src/test/compile-fail/block-coerce-no.rs
Niko Matsakis 9e3d0b002a librustc: Remove the fallback to int from typechecking.
This breaks a fair amount of code. The typical patterns are:

* `for _ in range(0, 10)`: change to `for _ in range(0u, 10)`;

* `println!("{}", 3)`: change to `println!("{}", 3i)`;

* `[1, 2, 3].len()`: change to `[1i, 2, 3].len()`.

RFC #30. Closes #6023.

[breaking-change]
2014-06-24 17:18:48 -07:00

29 lines
908 B
Rust

// Copyright 2012 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.
// Make sure that fn-to-block coercion isn't incorrectly lifted over
// other tycons.
extern crate debug;
fn coerce(b: ||) -> extern fn() {
fn lol(f: extern fn(v: ||) -> extern fn(),
g: ||) -> extern fn() { return f(g); }
fn fn_id(f: extern fn()) -> extern fn() { return f }
return lol(fn_id, b);
//~^ ERROR mismatched types
}
fn main() {
let i = 8i;
let f = coerce(|| println!("{:?}", i) );
f();
}