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// Resources can't be copied, but storing into data structures counts
// as a move unless the stored thing is used afterwards.
resource r(i: @mutable int) {
*i = *i + 1;
}
fn test_box() {
let i = @mutable 0;
{
let a <- @r(i);
}
assert *i == 1;
}
fn test_rec() {
let i = @mutable 0;
{
let a <- {x: r(i)};
}
assert *i == 1;
}
fn test_tag() {
enum t {
t0(r),
}
let i = @mutable 0;
{
let a <- t0(r(i));
}
assert *i == 1;
}
fn test_tup() {
let i = @mutable 0;
{
let a <- (r(i), 0);
}
assert *i == 1;
}
fn test_unique() {
let i = @mutable 0;
{
let a <- ~r(i);
}
assert *i == 1;
}
fn test_box_rec() {
let i = @mutable 0;
{
let a <- @{
x: r(i)
};
}
assert *i == 1;
}
fn main() {
test_box();
test_rec();
// FIXME: enum constructors don't optimize their arguments into moves
// test_tag();
test_tup();
test_unique();
test_box_rec();
}
|
