Add test case for #1894
This commit is contained in:
parent
1471b1f3ff
commit
072b015515
1 changed files with 31 additions and 0 deletions
31
src/test/run-pass/last-use-corner-cases.rs
Normal file
31
src/test/run-pass/last-use-corner-cases.rs
Normal file
|
@ -0,0 +1,31 @@
|
|||
fn main() {
|
||||
// Make sure closing over can be a last use
|
||||
let q = ~10;
|
||||
let addr = ptr::addr_of(*q);
|
||||
let f = fn@() -> *int { ptr::addr_of(*q) };
|
||||
assert addr == f();
|
||||
|
||||
// But only when it really is the last use
|
||||
let q = ~20;
|
||||
let f = fn@() -> *int { ptr::addr_of(*q) };
|
||||
assert ptr::addr_of(*q) != f();
|
||||
|
||||
// Ensure function arguments and box arguments interact sanely.
|
||||
fn call_me(x: fn() -> int, y: ~int) { assert x() == *y; }
|
||||
let q = ~30;
|
||||
call_me({|| *q}, q);
|
||||
|
||||
// Check that no false positives are found in loops.
|
||||
let q = ~40, p = 10;
|
||||
while true {
|
||||
let i = q;
|
||||
p += *i;
|
||||
if p > 100 { break; }
|
||||
}
|
||||
|
||||
// Verify that blocks can't interfere with each other.
|
||||
fn two_blocks(a: fn(), b: fn()) { a(); b(); a(); b(); }
|
||||
let q = ~50;
|
||||
two_blocks({|| let a = q; assert *a == 50;},
|
||||
{|| let a = q; assert *a == 50;});
|
||||
}
|
Loading…
Reference in a new issue