232424d995
This commit stabilizes the `std::num` module: * The `Int` and `Float` traits are deprecated in favor of (1) the newly-added inherent methods and (2) the generic traits available in rust-lang/num. * The `Zero` and `One` traits are reintroduced in `std::num`, which together with various other traits allow you to recover the most common forms of generic programming. * The `FromStrRadix` trait, and associated free function, is deprecated in favor of inherent implementations. * A wide range of methods and constants for both integers and floating point numbers are now `#[stable]`, having been adjusted for integer guidelines. * `is_positive` and `is_negative` are renamed to `is_sign_positive` and `is_sign_negative`, in order to address #22985 * The `Wrapping` type is moved to `std::num` and stabilized; `WrappingOps` is deprecated in favor of inherent methods on the integer types, and direct implementation of operations on `Wrapping<X>` for each concrete integer type `X`. Closes #22985 Closes #21069 [breaking-change]
67 lines
1.5 KiB
Rust
67 lines
1.5 KiB
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![allow(unused_variables)]
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#![allow(non_camel_case_types)]
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#![deny(dead_code)]
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#![feature(libc)]
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#![feature(core)]
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extern crate libc;
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struct Foo {
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x: usize,
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b: bool, //~ ERROR: struct field is never used
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marker: std::marker::NoCopy
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}
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fn field_read(f: Foo) -> usize {
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f.x.pow(2)
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}
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enum XYZ {
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X, //~ ERROR variant is never used
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Y { //~ ERROR variant is never used
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a: String,
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b: isize //~ ERROR: struct field is never used
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},
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Z
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}
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fn field_match_in_patterns(b: XYZ) -> String {
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match b {
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XYZ::Y { a, .. } => a,
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_ => "".to_string()
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}
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}
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struct Bar {
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x: usize, //~ ERROR: struct field is never used
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b: bool,
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_guard: ()
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}
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#[repr(C)]
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struct Baz {
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x: libc::c_uint
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}
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fn field_match_in_let(f: Bar) -> bool {
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let Bar { b, .. } = f;
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b
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}
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fn main() {
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field_read(Foo { x: 1, b: false, marker: std::marker::NoCopy });
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field_match_in_patterns(XYZ::Z);
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field_match_in_let(Bar { x: 42, b: true, _guard: () });
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let _ = Baz { x: 0 };
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}
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