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// xfail-win32
use std;
import tuple::{first, second};
import std::list::{list, cons, nil};
import std::time::precise_time_s;
fn main() {
let (repeat, depth) = if os::getenv("RUST_BENCH").is_some() {
(50, 1000)
} else {
(10, 10)
};
run(repeat, depth);
}
fn run(repeat: int, depth: int) {
iter::repeat(repeat as uint) { ||
#debug("starting %.4f", precise_time_s());
task::try { ||
recurse_or_fail(depth, none)
};
#debug("stopping %.4f", precise_time_s());
}
}
type nillist = list<()>;
// Filled with things that have to be unwound
enum st {
st_({
box: @nillist,
unique: ~nillist,
fn_box: fn@() -> @nillist,
fn_unique: fn~() -> ~nillist,
tuple: (@nillist, ~nillist),
vec: [@nillist]/~,
res: r
})
}
class r {
let _l: @nillist;
new(l: @nillist) { self._l = l; }
drop {}
}
fn recurse_or_fail(depth: int, st: option<st>) {
if depth == 0 {
#debug("unwinding %.4f", precise_time_s());
fail;
} else {
let depth = depth - 1;
let st = alt st {
none {
st_({
box: @nil,
unique: ~nil,
fn_box: fn@() -> @nillist { @nil::<()> },
fn_unique: fn~() -> ~nillist { ~nil::<()> },
tuple: (@nil, ~nil),
vec: [@nil]/~,
res: r(@nil)
})
}
some(st) {
let fn_box = st.fn_box;
let fn_unique = st.fn_unique;
st_({
box: @cons((), st.box),
unique: ~cons((), @*st.unique),
fn_box: fn@() -> @nillist { @cons((), fn_box()) },
fn_unique: fn~() -> ~nillist { ~cons((), @*fn_unique()) },
tuple: (@cons((), first(st.tuple)),
~cons((), @*second(st.tuple))),
vec: st.vec + [@cons((), st.vec.last())]/~,
res: r(@cons((), st.res._l))
})
}
};
recurse_or_fail(depth, some(st));
}
}
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