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/*
Module: util
*/
/*
Function: id
The identity function
*/
pure fn id<T: copy>(x: T) -> T { x }
/*
Function: unreachable
A standard function to use to indicate unreachable code. Because the
function is guaranteed to fail typestate will correctly identify
any code paths following the appearance of this function as unreachable.
*/
fn unreachable() -> ! {
fail "Internal error: entered unreachable code";
}
/* FIXME (issue #141): See test/run-pass/constrained-type.rs. Uncomment
* the constraint once fixed. */
/*
Function: rational
A rational number
*/
type rational = {num: int, den: int}; // : int::positive(*.den);
/*
Function: rational_leq
*/
pure fn rational_leq(x: rational, y: rational) -> bool {
// NB: Uses the fact that rationals have positive denominators WLOG:
x.num * y.den <= y.num * x.den
}
// Local Variables:
// mode: rust;
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// End:
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