rust/src/test/compile-fail/fn-constraint.rs

// error-pattern: Unsatisfied precondition constraint (for example, le(a, b)
use std;
import std::str::*;

fn main() {
  let uint a = 4u;
  let uint b = 1u;
  log_err (safe_slice("kitties", a, b));
}
Serialize constraints in types (literal arguments still not supported) This involved, in part, changing the ast::def type so that a def_fn has a "purity" field. This lets the typechecker determine whether functions defined in other crates are pure. It also required updating some error messages in tests. As a test for cross-crate constrained functions, I added a safe_slice function to std::str (slice(), with one of the asserts replaced with a function precondition) and some test cases (various versions of fn-constraint.rs) that call it. Also, I changed "fn" to "pred" for some of the boolean functions in std::uint. 2011-06-20 19:29:54 -05:00			`// error-pattern: Unsatisfied precondition constraint (for example, le(a, b)`
			`use std;`
			`import std::str::*;`

			`fn main() {`
			`let uint a = 4u;`
			`let uint b = 1u;`
			`log_err (safe_slice("kitties", a, b));`
			`}`