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test: add testcases for external iterators using foreach.

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graydon committed Jul 31, 2013
1 parent 62b6fa0 commit a696f0fecb9d11204f64d310eb66e095f64bd04a
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// 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.

fn main() {
let x = [1,..100];
let mut y = 0;
foreach i in x.iter() {
if y > 10 {
break;
}
y += *i;
}
assert!(y == 11);
}
@@ -0,0 +1,41 @@
// 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.

use std::hashmap::HashMap;

// This is a fancy one: it uses an external iterator established
// outside the loop, breaks, then _picks back up_ and continues
// iterating with it.

fn main() {
let mut h = HashMap::new();
let kvs = [(1, 10), (2, 20), (3, 30)];
foreach &(k,v) in kvs.iter() {
h.insert(k,v);
}
let mut x = 0;
let mut y = 0;

let mut i = h.iter();

foreach (&k,&v) in i {
x += k;
y += v;
break;
}

foreach (&k,&v) in i {
x += k;
y += v;
}

assert_eq!(x, 6);
assert_eq!(y, 60);
}
@@ -0,0 +1,27 @@
// 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.

use std::hashmap::HashMap;

fn main() {
let mut h = HashMap::new();
let kvs = [(1, 10), (2, 20), (3, 30)];
foreach &(k,v) in kvs.iter() {
h.insert(k,v);
}
let mut x = 0;
let mut y = 0;
foreach (&k,&v) in h.iter() {
x += k;
y += v;
}
assert_eq!(x, 6);
assert_eq!(y, 60);
}
@@ -0,0 +1,21 @@
// 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.

fn main() {
let x = [1,..100];
let mut y = 0;
foreach (n,i) in x.iter().enumerate() {
if n < 10 {
loop;
}
y += *i;
}
assert_eq!(y, 90);
}
@@ -0,0 +1,23 @@
// 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.

fn main() {
let x = [1,..100];
let y = [2,..100];
let mut p = 0;
let mut q = 0;
foreach i in x.iter() {
foreach j in y.iter() {
p += *j;
}
q += *i + p;
}
assert!(q == 1010100);
}
@@ -0,0 +1,18 @@
// 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.

fn main() {
let x = [1,..100];
let mut y = 0;
foreach i in x.iter() {
y += *i
}
assert!(y == 100);
}

5 comments on commit a696f0f

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@bors bors replied Jul 31, 2013

saw approval from brson
at graydon@a696f0f

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@bors bors replied Jul 31, 2013

merging graydon/rust/foreach-in-sketch = a696f0f into auto

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@bors bors replied Jul 31, 2013

graydon/rust/foreach-in-sketch = a696f0f merged ok, testing candidate = 6296dc0

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@bors bors replied Jul 31, 2013

fast-forwarding master to auto = 6296dc0

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