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rust/src/test/run-pass/small-enum-range-edge.rs

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Initial implementation of enum discrimnant sizing. Allows an enum with a discriminant to use any of the primitive integer types to store it. By default the smallest usable type is chosen, but this can be overridden with an attribute: `#[repr(int)]` etc., or `#[repr(C)]` to match the target's C ABI for the equivalent C enum. This commit breaks a few things, due to transmutes that now no longer match in size, or u8 enums being passed to C that expects int, or reflection; later commits on this branch fix them.
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// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
rustdoc: Replace no-pretty-expanded with pretty-expanded Now that features must be declared expanded source often does not compile. This adds 'pretty-expanded' to a bunch of test cases that still work.
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Include feature `core` to get access to `wrapping_add`.
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// this is for the wrapping_add call below.
#![feature(core)]
Initial implementation of enum discrimnant sizing. Allows an enum with a discriminant to use any of the primitive integer types to store it. By default the smallest usable type is chosen, but this can be overridden with an attribute: `#[repr(int)]` etc., or `#[repr(C)]` to match the target's C ABI for the equivalent C enum. This commit breaks a few things, due to transmutes that now no longer match in size, or u8 enums being passed to C that expects int, or reflection; later commits on this branch fix them.
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/*!
Rename trans to codegen everywhere.
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* Tests the range assertion wraparound case when reading discriminants.
Initial implementation of enum discrimnant sizing. Allows an enum with a discriminant to use any of the primitive integer types to store it. By default the smallest usable type is chosen, but this can be overridden with an attribute: `#[repr(int)]` etc., or `#[repr(C)]` to match the target's C ABI for the equivalent C enum. This commit breaks a few things, due to transmutes that now no longer match in size, or u8 enums being passed to C that expects int, or reflection; later commits on this branch fix them.
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*/
#[repr(u8)]
Fallout in tests
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#[derive(Copy, Clone)]
Initial implementation of enum discrimnant sizing. Allows an enum with a discriminant to use any of the primitive integer types to store it. By default the smallest usable type is chosen, but this can be overridden with an attribute: `#[repr(int)]` etc., or `#[repr(C)]` to match the target's C ABI for the equivalent C enum. This commit breaks a few things, due to transmutes that now no longer match in size, or u8 enums being passed to C that expects int, or reflection; later commits on this branch fix them.
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enum Eu { Lu = 0, Hu = 255 }
librustc: Make `Copy` opt-in. This change makes the compiler no longer infer whether types (structures and enumerations) implement the `Copy` trait (and thus are implicitly copyable). Rather, you must implement `Copy` yourself via `impl Copy for MyType {}`. A new warning has been added, `missing_copy_implementations`, to warn you if a non-generic public type has been added that could have implemented `Copy` but didn't. For convenience, you may *temporarily* opt out of this behavior by using `#![feature(opt_out_copy)]`. Note though that this feature gate will never be accepted and will be removed by the time that 1.0 is released, so you should transition your code away from using it. This breaks code like: #[deriving(Show)] struct Point2D { x: int, y: int, } fn main() { let mypoint = Point2D { x: 1, y: 1, }; let otherpoint = mypoint; println!("{}{}", mypoint, otherpoint); } Change this code to: #[deriving(Show)] struct Point2D { x: int, y: int, } impl Copy for Point2D {} fn main() { let mypoint = Point2D { x: 1, y: 1, }; let otherpoint = mypoint; println!("{}{}", mypoint, otherpoint); } This is the backwards-incompatible part of #13231. Part of RFC #3. [breaking-change]
2014-12-05 19:01:33 -06:00
Switch to purely namespaced enums This breaks code that referred to variant names in the same namespace as their enum. Reexport the variants in the old location or alter code to refer to the new locations: ``` pub enum Foo { A, B } fn main() { let a = A; } ``` => ``` pub use self::Foo::{A, B}; pub enum Foo { A, B } fn main() { let a = A; } ``` or ``` pub enum Foo { A, B } fn main() { let a = Foo::A; } ``` [breaking-change]
2014-11-06 02:05:53 -06:00
static CLu: Eu = Eu::Lu;
static CHu: Eu = Eu::Hu;
Initial implementation of enum discrimnant sizing. Allows an enum with a discriminant to use any of the primitive integer types to store it. By default the smallest usable type is chosen, but this can be overridden with an attribute: `#[repr(int)]` etc., or `#[repr(C)]` to match the target's C ABI for the equivalent C enum. This commit breaks a few things, due to transmutes that now no longer match in size, or u8 enums being passed to C that expects int, or reflection; later commits on this branch fix them.
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#[repr(i8)]
Fallout in tests
2015-03-30 08:38:27 -05:00
#[derive(Copy, Clone)]
Initial implementation of enum discrimnant sizing. Allows an enum with a discriminant to use any of the primitive integer types to store it. By default the smallest usable type is chosen, but this can be overridden with an attribute: `#[repr(int)]` etc., or `#[repr(C)]` to match the target's C ABI for the equivalent C enum. This commit breaks a few things, due to transmutes that now no longer match in size, or u8 enums being passed to C that expects int, or reflection; later commits on this branch fix them.
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enum Es { Ls = -128, Hs = 127 }
librustc: Make `Copy` opt-in. This change makes the compiler no longer infer whether types (structures and enumerations) implement the `Copy` trait (and thus are implicitly copyable). Rather, you must implement `Copy` yourself via `impl Copy for MyType {}`. A new warning has been added, `missing_copy_implementations`, to warn you if a non-generic public type has been added that could have implemented `Copy` but didn't. For convenience, you may *temporarily* opt out of this behavior by using `#![feature(opt_out_copy)]`. Note though that this feature gate will never be accepted and will be removed by the time that 1.0 is released, so you should transition your code away from using it. This breaks code like: #[deriving(Show)] struct Point2D { x: int, y: int, } fn main() { let mypoint = Point2D { x: 1, y: 1, }; let otherpoint = mypoint; println!("{}{}", mypoint, otherpoint); } Change this code to: #[deriving(Show)] struct Point2D { x: int, y: int, } impl Copy for Point2D {} fn main() { let mypoint = Point2D { x: 1, y: 1, }; let otherpoint = mypoint; println!("{}{}", mypoint, otherpoint); } This is the backwards-incompatible part of #13231. Part of RFC #3. [breaking-change]
2014-12-05 19:01:33 -06:00
Switch to purely namespaced enums This breaks code that referred to variant names in the same namespace as their enum. Reexport the variants in the old location or alter code to refer to the new locations: ``` pub enum Foo { A, B } fn main() { let a = A; } ``` => ``` pub use self::Foo::{A, B}; pub enum Foo { A, B } fn main() { let a = A; } ``` or ``` pub enum Foo { A, B } fn main() { let a = Foo::A; } ``` [breaking-change]
2014-11-06 02:05:53 -06:00
static CLs: Es = Es::Ls;
static CHs: Es = Es::Hs;
Initial implementation of enum discrimnant sizing. Allows an enum with a discriminant to use any of the primitive integer types to store it. By default the smallest usable type is chosen, but this can be overridden with an attribute: `#[repr(int)]` etc., or `#[repr(C)]` to match the target's C ABI for the equivalent C enum. This commit breaks a few things, due to transmutes that now no longer match in size, or u8 enums being passed to C that expects int, or reflection; later commits on this branch fix them.
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pub fn main() {
Fallout from changes for overflow-checking during constant evaluation.
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assert_eq!((Eu::Hu as u8).wrapping_add(1), Eu::Lu as u8);
assert_eq!((Es::Hs as i8).wrapping_add(1), Es::Ls as i8);
Switch to purely namespaced enums This breaks code that referred to variant names in the same namespace as their enum. Reexport the variants in the old location or alter code to refer to the new locations: ``` pub enum Foo { A, B } fn main() { let a = A; } ``` => ``` pub use self::Foo::{A, B}; pub enum Foo { A, B } fn main() { let a = A; } ``` or ``` pub enum Foo { A, B } fn main() { let a = Foo::A; } ``` [breaking-change]
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assert_eq!(CLu as u8, Eu::Lu as u8);
assert_eq!(CHu as u8, Eu::Hu as u8);
assert_eq!(CLs as i8, Es::Ls as i8);
assert_eq!(CHs as i8, Es::Hs as i8);
Initial implementation of enum discrimnant sizing. Allows an enum with a discriminant to use any of the primitive integer types to store it. By default the smallest usable type is chosen, but this can be overridden with an attribute: `#[repr(int)]` etc., or `#[repr(C)]` to match the target's C ABI for the equivalent C enum. This commit breaks a few things, due to transmutes that now no longer match in size, or u8 enums being passed to C that expects int, or reflection; later commits on this branch fix them.
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}
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