fn macros() {
    macro_rules! foo{
        ($p:pat, $e:expr, $b:block) => {{
            while let $p = $e $b
        }}
    }
    macro_rules! bar{
        ($p:pat, $e:expr, $b:block) => {{
            foo!($p, $e, $b)
        }}
    }

    foo!(a, 1, { //~ ERROR irrefutable while-let
        println!("irrefutable pattern");
    });
    bar!(a, 1, { //~ ERROR irrefutable while-let
        println!("irrefutable pattern");
    });
}
// Copyright 2014 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.


Licensed under the Apache License, Version 2.0  or the MIT license
, at your
option. This file may not be copied, modified, or distributed
except according to those terms.
Licensed under the Apache License Version 2 . 0 or the MIT license at your option . This file may not be copied modified or distributed except according to those terms .
fn macros() {
    macro_rules! foo{
        ($p:pat, $e:expr, $b:block) => {{
            while let $p = $e $b
        }}
    }
    macro_rules! bar{
        ($p:pat, $e:expr, $b:block) => {{
            foo!($p, $e, $b)
        }}
    }
    foo!(a, 1, { //~ ERROR irrefutable while-let
        println!("irrefutable pattern");
    });
    bar!(a, 1, { //~ ERROR irrefutable while-let
        println!("irrefutable pattern");
    });
}
fn macros ( ) { macro_rules! foo { ( $p : pat $e : expr $b : block ) => { { while let $p $e $b } } } macro_rules! bar { ( $p : pat $e : expr $b : block ) => { { foo ( $p $e $b ) } } } foo ! ( a 1 { //~ ERROR irrefutable while-let println ( " " ) } ) ; bar ! ( a 1 { //~ ERROR irrefutable while-let println ( " " ) } ) ; }
Copyright 2014 The Rust Project Developers.
Copyright 2014 The Rust Project Developers .