rust/src/test/compile-fail/pred-swap.rs
Niko Matsakis 0d3811e275 improve liveness so it reports unused vars / dead assignments
doesn't warn about pattern bindings yet though
2012-05-24 09:52:16 -07:00

17 lines
319 B
Rust

// -*- rust -*-
// error-pattern:unsatisfied precondition constraint (for example, lt(a, b)
fn f(a: int, b: int) : lt(a, b) { }
pure fn lt(a: int, b: int) -> bool { ret a < b; }
fn main() {
let mut a: int = 10;
let mut b: int = 23;
let mut c: int = 77;
check (lt(a, b));
b <-> a;
f(a, b);
}