rust/src/libstd/util.rs

/// The identity function
pure fn id<T: copy>(x: T) -> T { x }

/* FIXME (issue #141):  See test/run-pass/constrained-type.rs.  Uncomment
 * the constraint once fixed. */
/// A rational number
type rational = {num: int, den: int}; // : int::positive(*.den);

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:
convert doc-attributes to doc-comments using ./src/etc/sugarise-doc-comments.py (and manually tweaking) - for issue #2498 2012-07-04 16:53:12 -05:00			`/// The identity function`
Switch to new param kind bound syntax And remove support for the old syntax 2012-01-05 08:35:37 -06:00			`pure fn id<T: copy>(x: T) -> T { x }`
Reformat source tree (minus a couple tests that are still grumpy). 2011-06-15 13:19:50 -05:00
More stdlib hashmap bits (plus some drive-by extras). 2010-08-03 19:52:35 -05:00			`/* FIXME (issue #141): See test/run-pass/constrained-type.rs. Uncomment`
			`* the constraint once fixed. */`
convert doc-attributes to doc-comments using ./src/etc/sugarise-doc-comments.py (and manually tweaking) - for issue #2498 2012-07-04 16:53:12 -05:00			`/// A rational number`
Add unreachable() fn, also nitpicking 2011-09-15 17:24:22 -05:00			`type rational = {num: int, den: int}; // : int::positive(*.den);`
Reformat a bunch of recent churn. 2011-06-16 18:55:46 -05:00
Add unreachable() fn, also nitpicking 2011-09-15 17:24:22 -05:00			`pure fn rational_leq(x: rational, y: rational) -> bool {`
Downcase std modules again, move to :: for module dereferencing This should be a snapshot transition. 2011-05-12 10:24:54 -05:00			`// NB: Uses the fact that rationals have positive denominators WLOG:`
Reformat standard library; no code changes. 2010-09-22 17:44:13 -05:00
Add unreachable() fn, also nitpicking 2011-09-15 17:24:22 -05:00			`x.num * y.den <= y.num * x.den`
Continued sketching out code for checking states against preconditions. It's still sketchy. I added a typestate annotation field to statements tagged stmt_decl or stmt_expr, because a stmt_decl statement has a typestate that's different from that of its child node. This necessitated trivial changes to a bunch of other files all over to the compiler. I also added a few small standard library functions, some of which I didn't actually end up using but which I thought might be useful anyway. 2011-04-06 19:56:44 -05:00			`}`

Reformat standard library; no code changes. 2010-09-22 17:44:13 -05:00			`// Local Variables:`
			`// mode: rust;`
			`// fill-column: 78;`
			`// indent-tabs-mode: nil`
			`// c-basic-offset: 4`
			`// buffer-file-coding-system: utf-8-unix`
			`// End:`