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Diffstat (limited to 'third_party/rust/num-derive')
| -rw-r--r-- | third_party/rust/num-derive/.cargo-checksum.json | 1 | ||||
| -rw-r--r-- | third_party/rust/num-derive/Cargo.toml | 55 | ||||
| -rw-r--r-- | third_party/rust/num-derive/LICENSE-APACHE | 201 | ||||
| -rw-r--r-- | third_party/rust/num-derive/LICENSE-MIT | 25 | ||||
| -rw-r--r-- | third_party/rust/num-derive/README.md | 69 | ||||
| -rw-r--r-- | third_party/rust/num-derive/RELEASES.md | 105 | ||||
| -rw-r--r-- | third_party/rust/num-derive/src/lib.rs | 958 | ||||
| -rw-r--r-- | third_party/rust/num-derive/src/test.rs | 31 | ||||
| -rw-r--r-- | third_party/rust/num-derive/tests/empty_enum.rs | 23 | ||||
| -rw-r--r-- | third_party/rust/num-derive/tests/issue-6.rs | 17 | ||||
| -rw-r--r-- | third_party/rust/num-derive/tests/issue-9.rs | 18 | ||||
| -rw-r--r-- | third_party/rust/num-derive/tests/newtype-2015.rs | 2 | ||||
| -rw-r--r-- | third_party/rust/num-derive/tests/newtype.rs | 89 | ||||
| -rw-r--r-- | third_party/rust/num-derive/tests/num_derive_without_num.rs | 20 | ||||
| -rw-r--r-- | third_party/rust/num-derive/tests/trivial-2015.rs | 2 | ||||
| -rw-r--r-- | third_party/rust/num-derive/tests/trivial.rs | 64 | ||||
| -rw-r--r-- | third_party/rust/num-derive/tests/with_custom_values.rs | 70 |
17 files changed, 1750 insertions, 0 deletions
diff --git a/third_party/rust/num-derive/.cargo-checksum.json b/third_party/rust/num-derive/.cargo-checksum.json new file mode 100644 index 0000000000..fe87985b3c --- /dev/null +++ b/third_party/rust/num-derive/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"Cargo.toml":"aeffa6070dd5f4311b70d4baf3723f48c58bf5895a529ddd3f2548042ecedce8","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"6485b8ed310d3f0340bf1ad1f47645069ce4069dcc6bb46c7d5c6faf41de1fdb","README.md":"d772e283044982c8d132220666f831a2add33d2d891aee4faf61d6b1c8b81b6c","RELEASES.md":"a9031e1846496d2c19baea11378d038fc4c4789e224365c20f8e4f783a45fb23","src/lib.rs":"e0e97564d9e1ddb6bb70bc5e2a5b3825dbbfe689dacedd019d5e77cde8c56693","src/test.rs":"59cd2e3ab76bf4c4adae9bf9fe49d8c1f9e98d35f7c8ca47c8199b117bb13b22","tests/empty_enum.rs":"1b2312ec2fc9866fce7172e71e0aa2efcc3cb9d7659d0b633eb352bb1e080d53","tests/issue-6.rs":"b7fbbe86ff82933c15ec09fabadca02d2c70e184af30b9887cae83ed2f60367e","tests/issue-9.rs":"4c87f70a63e56c24480028fafa39a845d127620141df21bc0abfa23f84ff9bb7","tests/newtype-2015.rs":"163f76f0c139c3621ba7416cec5f9fb966c86c5ebed270df77196cf75d62402f","tests/newtype.rs":"bc1ff3fb3680935c2280cc91441c91ea104be24f525428987b49b86bc880217a","tests/num_derive_without_num.rs":"3ce528221a2cb752859e20c5423c4b474fec714b41d8c1b62f5614b165d7262b","tests/trivial-2015.rs":"1745e23dfafb8c717365e57d79323c61c7d4ceaa092d7399ed793fd4f2de8ff6","tests/trivial.rs":"a6b0faab04527f6835f43cd72317a00065a7a6cf4c506d04e77f898134f7a59b","tests/with_custom_values.rs":"9f15c4b732050a5498a9691c2b41902bd9172f0c7c5d3af152ea9bd4a272e885"},"package":"876a53fff98e03a936a674b29568b0e605f06b29372c2489ff4de23f1949743d"}
\ No newline at end of file diff --git a/third_party/rust/num-derive/Cargo.toml b/third_party/rust/num-derive/Cargo.toml new file mode 100644 index 0000000000..90c5d27238 --- /dev/null +++ b/third_party/rust/num-derive/Cargo.toml @@ -0,0 +1,55 @@ +# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO +# +# When uploading crates to the registry Cargo will automatically +# "normalize" Cargo.toml files for maximal compatibility +# with all versions of Cargo and also rewrite `path` dependencies +# to registry (e.g., crates.io) dependencies +# +# If you believe there's an error in this file please file an +# issue against the rust-lang/cargo repository. If you're +# editing this file be aware that the upstream Cargo.toml +# will likely look very different (and much more reasonable) + +[package] +edition = "2018" +name = "num-derive" +version = "0.3.3" +authors = ["The Rust Project Developers"] +exclude = ["/bors.toml", "/ci/*", "/.github/*"] +description = "Numeric syntax extensions" +homepage = "https://github.com/rust-num/num-derive" +documentation = "https://docs.rs/num-derive" +readme = "README.md" +keywords = ["mathematics", "numerics"] +categories = ["science"] +license = "MIT OR Apache-2.0" +repository = "https://github.com/rust-num/num-derive" + +[lib] +name = "num_derive" +test = false +proc-macro = true + +[[test]] +name = "newtype-2015" +edition = "2015" + +[[test]] +name = "trivial-2015" +edition = "2015" +[dependencies.proc-macro2] +version = "1" + +[dependencies.quote] +version = "1" + +[dependencies.syn] +version = "1" +[dev-dependencies.num] +version = "0.3" + +[dev-dependencies.num-traits] +version = "0.2" + +[features] +full-syntax = ["syn/full"] diff --git a/third_party/rust/num-derive/LICENSE-APACHE b/third_party/rust/num-derive/LICENSE-APACHE new file mode 100644 index 0000000000..16fe87b06e --- /dev/null +++ b/third_party/rust/num-derive/LICENSE-APACHE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + +TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + +1. 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IN NO EVENT +SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR +IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. diff --git a/third_party/rust/num-derive/README.md b/third_party/rust/num-derive/README.md new file mode 100644 index 0000000000..9826cdfc76 --- /dev/null +++ b/third_party/rust/num-derive/README.md @@ -0,0 +1,69 @@ +# num-derive + +[](https://crates.io/crates/num-derive) +[](https://docs.rs/num-derive) +[](https://rust-lang.github.io/rfcs/2495-min-rust-version.html) +[](https://github.com/rust-num/num-derive/actions) + +Procedural macros to derive numeric traits in Rust. + +## Usage + +Add this to your `Cargo.toml`: + +```toml +[dependencies] +num-traits = "0.2" +num-derive = "0.3" +``` + +and this to your crate root: + +```rust +#[macro_use] +extern crate num_derive; +``` + +Then you can derive traits on your own types: + +```rust +#[derive(FromPrimitive, ToPrimitive)] +enum Color { + Red, + Blue, + Green, +} +``` + +## Optional features + +- **`full-syntax`** — Enables `num-derive` to handle enum discriminants + represented by complex expressions. Usually can be avoided by + [utilizing constants], so only use this feature if namespace pollution is + undesired and [compile time doubling] is acceptable. + +[utilizing constants]: https://github.com/rust-num/num-derive/pull/3#issuecomment-359044704 +[compile time doubling]: https://github.com/rust-num/num-derive/pull/3#issuecomment-359172588 + +## Releases + +Release notes are available in [RELEASES.md](RELEASES.md). + +## Compatibility + +The `num-derive` crate is tested for rustc 1.31 and greater. + +## License + +Licensed under either of + + * [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0) + * [MIT license](http://opensource.org/licenses/MIT) + +at your option. + +### Contribution + +Unless you explicitly state otherwise, any contribution intentionally submitted +for inclusion in the work by you, as defined in the Apache-2.0 license, shall be +dual licensed as above, without any additional terms or conditions. diff --git a/third_party/rust/num-derive/RELEASES.md b/third_party/rust/num-derive/RELEASES.md new file mode 100644 index 0000000000..c3e18cca00 --- /dev/null +++ b/third_party/rust/num-derive/RELEASES.md @@ -0,0 +1,105 @@ +# Release 0.3.3 (2020-10-29) + +- [Make `NumOps` work with `no_std`][41] -- thanks @jedrzejboczar! + +[41]: https://github.com/rust-num/num-derive/pull/41 + +# Release 0.3.2 (2020-08-24) + +- [Add `#[inline]` to all derived functions][40] -- thanks @Amanieu! + +[40]: https://github.com/rust-num/num-derive/pull/40 + +# Release 0.3.1 (2020-07-28) + +- [Add `num_traits` proc_macro helper for explicit import][35] - thanks @jean-airoldie! +- [Provide nicer parse errors and suggest "full-syntax"][39] + +[35]: https://github.com/rust-num/num-derive/pull/35 +[39]: https://github.com/rust-num/num-derive/pull/39 + +# Release 0.3.0 (2019-09-27) + +- [Updated the `proc-macro2`, `quote`, and `syn` dependencies to 1.0][28], + which raises the minimum supported rustc to 1.31. + +[28]: https://github.com/rust-num/num-derive/pull/28 + +# Release 0.2.5 (2019-04-23) + +- [Improved the masking of lints in derived code][23]. + +[23]: https://github.com/rust-num/num-derive/pull/23 + +# Release 0.2.4 (2019-01-25) + +- [Adjusted dependencies to allow no-std targets][22]. + +[22]: https://github.com/rust-num/num-derive/pull/22 + +# Release 0.2.3 (2018-10-03) + +- [Added newtype deriving][17] for `FromPrimitive`, `ToPrimitive`, + `NumOps<Self, Self>`, `NumCast`, `Zero`, `One`, `Num`, and `Float`. + Thanks @asayers! + +[17]: https://github.com/rust-num/num-derive/pull/17 + +# Release 0.2.2 (2018-05-22) + +- [Updated dependencies][14]. + +[14]: https://github.com/rust-num/num-derive/pull/14 + +# Release 0.2.1 (2018-05-09) + +- [Updated dependencies][12] -- thanks @spearman! + +[12]: https://github.com/rust-num/num-derive/pull/12 + +# Release 0.2.0 (2018-02-21) + +- [Discriminant matching is now simplified][10], casting values directly by + name, rather than trying to compute offsets from known values manually. +- **breaking change**: [Derivations now import the traits from `num-traits`][11] + instead of the full `num` crate. These are still compatible, but users need + to have an explicit `num-traits = "0.2"` dependency in their `Cargo.toml`. + +[10]: https://github.com/rust-num/num-derive/pull/10 +[11]: https://github.com/rust-num/num-derive/pull/11 + + +# Release 0.1.44 (2018-01-26) + +- [The derived code now explicitly allows `unused_qualifications`][9], so users + that globally deny that lint don't encounter an error. + +[9]: https://github.com/rust-num/num-derive/pull/9 + + +# Release 0.1.43 (2018-01-23) + +- [The derived code now explicitly allows `trivial_numeric_casts`][7], so users + that globally deny that lint don't encounter an error. + +[7]: https://github.com/rust-num/num-derive/pull/7 + + +# Release 0.1.42 (2018-01-22) + +- [num-derive now has its own source repository][num-356] at [rust-num/num-derive][home]. +- [The derivation macros have been updated][3] to using `syn` 0.12. Support for complex + expressions in enum values can be enabled with the `full-syntax` feature. + +Thanks to @cuviper and @hcpl for their contributions! + +[home]: https://github.com/rust-num/num-derive +[num-356]: https://github.com/rust-num/num/pull/356 +[3]: https://github.com/rust-num/num-derive/pull/3 + + +# Prior releases + +No prior release notes were kept. Thanks all the same to the many +contributors that have made this crate what it is! + diff --git a/third_party/rust/num-derive/src/lib.rs b/third_party/rust/num-derive/src/lib.rs new file mode 100644 index 0000000000..ef55e4b0df --- /dev/null +++ b/third_party/rust/num-derive/src/lib.rs @@ -0,0 +1,958 @@ +// Copyright 2012-2015 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. + +#![crate_type = "proc-macro"] +#![doc(html_root_url = "https://docs.rs/num-derive/0.3")] +#![recursion_limit = "512"] + +//! Procedural macros to derive numeric traits in Rust. +//! +//! ## Usage +//! +//! Add this to your `Cargo.toml`: +//! +//! ```toml +//! [dependencies] +//! num-traits = "0.2" +//! num-derive = "0.3" +//! ``` +//! +//! Then you can derive traits on your own types: +//! +//! ```rust +//! #[macro_use] +//! extern crate num_derive; +//! +//! #[derive(FromPrimitive, ToPrimitive)] +//! enum Color { +//! Red, +//! Blue, +//! Green, +//! } +//! # fn main() {} +//! ``` +//! +//! ## Explicit import +//! +//! By default the `num_derive` procedural macros assume that the +//! `num_traits` crate is a direct dependency. If `num_traits` is instead +//! a transitive dependency, the `num_traits` helper attribute can be +//! used to tell `num_derive` to use a specific identifier for its imports. +//! +//! ```rust +//! #[macro_use] +//! extern crate num_derive; +//! // Lets pretend this is a transitive dependency from another crate +//! // reexported as `some_other_ident`. +//! extern crate num_traits as some_other_ident; +//! +//! #[derive(FromPrimitive, ToPrimitive)] +//! #[num_traits = "some_other_ident"] +//! enum Color { +//! Red, +//! Blue, +//! Green, +//! } +//! # fn main() {} +//! ``` + +extern crate proc_macro; + +use proc_macro::TokenStream; +use proc_macro2::{Span, TokenStream as TokenStream2}; +use quote::quote; +use syn::{Data, Fields, Ident}; + +/// Try to parse the tokens, or else return a compilation error +/// suggesting "full-syntax" if that's not already enabled. +macro_rules! parse { + ($tokens:ident as $type:ty) => { + match syn::parse::<$type>($tokens) { + Ok(parsed) => parsed, + Err(mut error) => { + if cfg!(not(feature = "full-syntax")) { + let hint = syn::Error::new( + Span::call_site(), + r#"this might need the "full-syntax" feature of `num-derive`"#, + ); + error.combine(hint); + } + return TokenStream::from(error.to_compile_error()); + } + } + }; +} + +// Within `exp`, you can bring things into scope with `extern crate`. +// +// We don't want to assume that `num_traits::` is in scope - the user may have imported it under a +// different name, or may have imported it in a non-toplevel module (common when putting impls +// behind a feature gate). +// +// Solution: let's just generate `extern crate num_traits as _num_traits` and then refer to +// `_num_traits` in the derived code. However, macros are not allowed to produce `extern crate` +// statements at the toplevel. +// +// Solution: let's generate `mod _impl_foo` and import num_traits within that. However, now we +// lose access to private members of the surrounding module. This is a problem if, for example, +// we're deriving for a newtype, where the inner type is defined in the same module, but not +// exported. +// +// Solution: use the dummy const trick. For some reason, `extern crate` statements are allowed +// here, but everything from the surrounding module is in scope. This trick is taken from serde. +fn dummy_const_trick(trait_: &str, name: &Ident, exp: TokenStream2) -> TokenStream2 { + let dummy_const = Ident::new( + &format!("_IMPL_NUM_{}_FOR_{}", trait_, unraw(name)), + Span::call_site(), + ); + quote! { + #[allow(non_upper_case_globals, unused_qualifications)] + const #dummy_const: () = { + #[allow(clippy::useless_attribute)] + #[allow(rust_2018_idioms)] + extern crate num_traits as _num_traits; + #exp + }; + } +} + +fn unraw(ident: &Ident) -> String { + ident.to_string().trim_start_matches("r#").to_owned() +} + +// If `data` is a newtype, return the type it's wrapping. +fn newtype_inner(data: &syn::Data) -> Option<syn::Type> { + match *data { + Data::Struct(ref s) => { + match s.fields { + Fields::Unnamed(ref fs) => { + if fs.unnamed.len() == 1 { + Some(fs.unnamed[0].ty.clone()) + } else { + None + } + } + Fields::Named(ref fs) => { + if fs.named.len() == 1 { + panic!("num-derive doesn't know how to handle newtypes with named fields yet. \ + Please use a tuple-style newtype, or submit a PR!"); + } + None + } + _ => None, + } + } + _ => None, + } +} + +struct NumTraits { + import: Ident, + explicit: bool, +} + +impl quote::ToTokens for NumTraits { + fn to_tokens(&self, tokens: &mut TokenStream2) { + self.import.to_tokens(tokens); + } +} + +impl NumTraits { + fn new(ast: &syn::DeriveInput) -> Self { + // If there is a `num_traits` MetaNameValue attribute on the input, + // retrieve its value, and use it to create an `Ident` to be used + // to import the `num_traits` crate. + for attr in &ast.attrs { + if let Ok(syn::Meta::NameValue(mnv)) = attr.parse_meta() { + if mnv.path.is_ident("num_traits") { + if let syn::Lit::Str(lit_str) = mnv.lit { + return NumTraits { + import: syn::Ident::new(&lit_str.value(), lit_str.span()), + explicit: true, + }; + } else { + panic!("#[num_traits] attribute value must be a str"); + } + } + } + } + + // Otherwise, we'll implicitly import our own. + NumTraits { + import: Ident::new("_num_traits", Span::call_site()), + explicit: false, + } + } + + fn wrap(&self, trait_: &str, name: &Ident, output: TokenStream2) -> TokenStream2 { + if self.explicit { + output + } else { + dummy_const_trick(trait_, &name, output) + } + } +} + +/// Derives [`num_traits::FromPrimitive`][from] for simple enums and newtypes. +/// +/// [from]: https://docs.rs/num-traits/0.2/num_traits/cast/trait.FromPrimitive.html +/// +/// # Examples +/// +/// Simple enums can be derived: +/// +/// ```rust +/// # #[macro_use] +/// # extern crate num_derive; +/// +/// #[derive(FromPrimitive)] +/// enum Color { +/// Red, +/// Blue, +/// Green = 42, +/// } +/// # fn main() {} +/// ``` +/// +/// Enums that contain data are not allowed: +/// +/// ```compile_fail +/// # #[macro_use] +/// # extern crate num_derive; +/// +/// #[derive(FromPrimitive)] +/// enum Color { +/// Rgb(u8, u8, u8), +/// Hsv(u8, u8, u8), +/// } +/// # fn main() {} +/// ``` +/// +/// Structs are not allowed: +/// +/// ```compile_fail +/// # #[macro_use] +/// # extern crate num_derive; +/// #[derive(FromPrimitive)] +/// struct Color { +/// r: u8, +/// g: u8, +/// b: u8, +/// } +/// # fn main() {} +/// ``` +#[proc_macro_derive(FromPrimitive, attributes(num_traits))] +pub fn from_primitive(input: TokenStream) -> TokenStream { + let ast = parse!(input as syn::DeriveInput); + let name = &ast.ident; + + let import = NumTraits::new(&ast); + + let impl_ = if let Some(inner_ty) = newtype_inner(&ast.data) { + quote! { + impl #import::FromPrimitive for #name { + #[inline] + fn from_i64(n: i64) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_i64(n).map(#name) + } + #[inline] + fn from_u64(n: u64) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_u64(n).map(#name) + } + #[inline] + fn from_isize(n: isize) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_isize(n).map(#name) + } + #[inline] + fn from_i8(n: i8) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_i8(n).map(#name) + } + #[inline] + fn from_i16(n: i16) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_i16(n).map(#name) + } + #[inline] + fn from_i32(n: i32) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_i32(n).map(#name) + } + #[inline] + fn from_i128(n: i128) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_i128(n).map(#name) + } + #[inline] + fn from_usize(n: usize) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_usize(n).map(#name) + } + #[inline] + fn from_u8(n: u8) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_u8(n).map(#name) + } + #[inline] + fn from_u16(n: u16) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_u16(n).map(#name) + } + #[inline] + fn from_u32(n: u32) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_u32(n).map(#name) + } + #[inline] + fn from_u128(n: u128) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_u128(n).map(#name) + } + #[inline] + fn from_f32(n: f32) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_f32(n).map(#name) + } + #[inline] + fn from_f64(n: f64) -> Option<Self> { + <#inner_ty as #import::FromPrimitive>::from_f64(n).map(#name) + } + } + } + } else { + let variants = match ast.data { + Data::Enum(ref data_enum) => &data_enum.variants, + _ => panic!( + "`FromPrimitive` can be applied only to enums and newtypes, {} is neither", + name + ), + }; + + let from_i64_var = quote! { n }; + let clauses: Vec<_> = variants + .iter() + .map(|variant| { + let ident = &variant.ident; + match variant.fields { + Fields::Unit => (), + _ => panic!( + "`FromPrimitive` can be applied only to unitary enums and newtypes, \ + {}::{} is either struct or tuple", + name, ident + ), + } + + quote! { + if #from_i64_var == #name::#ident as i64 { + Some(#name::#ident) + } + } + }) + .collect(); + + let from_i64_var = if clauses.is_empty() { + quote!(_) + } else { + from_i64_var + }; + + quote! { + impl #import::FromPrimitive for #name { + #[allow(trivial_numeric_casts)] + #[inline] + fn from_i64(#from_i64_var: i64) -> Option<Self> { + #(#clauses else)* { + None + } + } + + #[inline] + fn from_u64(n: u64) -> Option<Self> { + Self::from_i64(n as i64) + } + } + } + }; + + import.wrap("FromPrimitive", &name, impl_).into() +} + +/// Derives [`num_traits::ToPrimitive`][to] for simple enums and newtypes. +/// +/// [to]: https://docs.rs/num-traits/0.2/num_traits/cast/trait.ToPrimitive.html +/// +/// # Examples +/// +/// Simple enums can be derived: +/// +/// ```rust +/// # #[macro_use] +/// # extern crate num_derive; +/// +/// #[derive(ToPrimitive)] +/// enum Color { +/// Red, +/// Blue, +/// Green = 42, +/// } +/// # fn main() {} +/// ``` +/// +/// Enums that contain data are not allowed: +/// +/// ```compile_fail +/// # #[macro_use] +/// # extern crate num_derive; +/// +/// #[derive(ToPrimitive)] +/// enum Color { +/// Rgb(u8, u8, u8), +/// Hsv(u8, u8, u8), +/// } +/// # fn main() {} +/// ``` +/// +/// Structs are not allowed: +/// +/// ```compile_fail +/// # #[macro_use] +/// # extern crate num_derive; +/// #[derive(ToPrimitive)] +/// struct Color { +/// r: u8, +/// g: u8, +/// b: u8, +/// } +/// # fn main() {} +/// ``` +#[proc_macro_derive(ToPrimitive, attributes(num_traits))] +pub fn to_primitive(input: TokenStream) -> TokenStream { + let ast = parse!(input as syn::DeriveInput); + let name = &ast.ident; + + let import = NumTraits::new(&ast); + + let impl_ = if let Some(inner_ty) = newtype_inner(&ast.data) { + quote! { + impl #import::ToPrimitive for #name { + #[inline] + fn to_i64(&self) -> Option<i64> { + <#inner_ty as #import::ToPrimitive>::to_i64(&self.0) + } + #[inline] + fn to_u64(&self) -> Option<u64> { + <#inner_ty as #import::ToPrimitive>::to_u64(&self.0) + } + #[inline] + fn to_isize(&self) -> Option<isize> { + <#inner_ty as #import::ToPrimitive>::to_isize(&self.0) + } + #[inline] + fn to_i8(&self) -> Option<i8> { + <#inner_ty as #import::ToPrimitive>::to_i8(&self.0) + } + #[inline] + fn to_i16(&self) -> Option<i16> { + <#inner_ty as #import::ToPrimitive>::to_i16(&self.0) + } + #[inline] + fn to_i32(&self) -> Option<i32> { + <#inner_ty as #import::ToPrimitive>::to_i32(&self.0) + } + #[inline] + fn to_i128(&self) -> Option<i128> { + <#inner_ty as #import::ToPrimitive>::to_i128(&self.0) + } + #[inline] + fn to_usize(&self) -> Option<usize> { + <#inner_ty as #import::ToPrimitive>::to_usize(&self.0) + } + #[inline] + fn to_u8(&self) -> Option<u8> { + <#inner_ty as #import::ToPrimitive>::to_u8(&self.0) + } + #[inline] + fn to_u16(&self) -> Option<u16> { + <#inner_ty as #import::ToPrimitive>::to_u16(&self.0) + } + #[inline] + fn to_u32(&self) -> Option<u32> { + <#inner_ty as #import::ToPrimitive>::to_u32(&self.0) + } + #[inline] + fn to_u128(&self) -> Option<u128> { + <#inner_ty as #import::ToPrimitive>::to_u128(&self.0) + } + #[inline] + fn to_f32(&self) -> Option<f32> { + <#inner_ty as #import::ToPrimitive>::to_f32(&self.0) + } + #[inline] + fn to_f64(&self) -> Option<f64> { + <#inner_ty as #import::ToPrimitive>::to_f64(&self.0) + } + } + } + } else { + let variants = match ast.data { + Data::Enum(ref data_enum) => &data_enum.variants, + _ => panic!( + "`ToPrimitive` can be applied only to enums and newtypes, {} is neither", + name + ), + }; + + let variants: Vec<_> = variants + .iter() + .map(|variant| { + let ident = &variant.ident; + match variant.fields { + Fields::Unit => (), + _ => { + panic!("`ToPrimitive` can be applied only to unitary enums and newtypes, {}::{} is either struct or tuple", name, ident) + }, + } + + // NB: We have to check each variant individually, because we'll only have `&self` + // for the input. We can't move from that, and it might not be `Clone` or `Copy`. + // (Otherwise we could just do `*self as i64` without a `match` at all.) + quote!(#name::#ident => #name::#ident as i64) + }) + .collect(); + + let match_expr = if variants.is_empty() { + // No variants found, so do not use Some to not to trigger `unreachable_code` lint + quote! { + match *self {} + } + } else { + quote! { + Some(match *self { + #(#variants,)* + }) + } + }; + + quote! { + impl #import::ToPrimitive for #name { + #[inline] + #[allow(trivial_numeric_casts)] + fn to_i64(&self) -> Option<i64> { + #match_expr + } + + #[inline] + fn to_u64(&self) -> Option<u64> { + self.to_i64().map(|x| x as u64) + } + } + } + }; + + import.wrap("ToPrimitive", &name, impl_).into() +} + +const NEWTYPE_ONLY: &str = "This trait can only be derived for newtypes"; + +/// Derives [`num_traits::NumOps`][num_ops] for newtypes. The inner type must already implement +/// `NumOps`. +/// +/// [num_ops]: https://docs.rs/num-traits/0.2/num_traits/trait.NumOps.html +/// +/// Note that, since `NumOps` is really a trait alias for `Add + Sub + Mul + Div + Rem`, this macro +/// generates impls for _those_ traits. Furthermore, in all generated impls, `RHS=Self` and +/// `Output=Self`. +#[proc_macro_derive(NumOps)] +pub fn num_ops(input: TokenStream) -> TokenStream { + let ast = parse!(input as syn::DeriveInput); + let name = &ast.ident; + let inner_ty = newtype_inner(&ast.data).expect(NEWTYPE_ONLY); + let impl_ = quote! { + impl ::core::ops::Add for #name { + type Output = Self; + #[inline] + fn add(self, other: Self) -> Self { + #name(<#inner_ty as ::core::ops::Add>::add(self.0, other.0)) + } + } + impl ::core::ops::Sub for #name { + type Output = Self; + #[inline] + fn sub(self, other: Self) -> Self { + #name(<#inner_ty as ::core::ops::Sub>::sub(self.0, other.0)) + } + } + impl ::core::ops::Mul for #name { + type Output = Self; + #[inline] + fn mul(self, other: Self) -> Self { + #name(<#inner_ty as ::core::ops::Mul>::mul(self.0, other.0)) + } + } + impl ::core::ops::Div for #name { + type Output = Self; + #[inline] + fn div(self, other: Self) -> Self { + #name(<#inner_ty as ::core::ops::Div>::div(self.0, other.0)) + } + } + impl ::core::ops::Rem for #name { + type Output = Self; + #[inline] + fn rem(self, other: Self) -> Self { + #name(<#inner_ty as ::core::ops::Rem>::rem(self.0, other.0)) + } + } + }; + impl_.into() +} + +/// Derives [`num_traits::NumCast`][num_cast] for newtypes. The inner type must already implement +/// `NumCast`. +/// +/// [num_cast]: https://docs.rs/num-traits/0.2/num_traits/cast/trait.NumCast.html +#[proc_macro_derive(NumCast, attributes(num_traits))] +pub fn num_cast(input: TokenStream) -> TokenStream { + let ast = parse!(input as syn::DeriveInput); + let name = &ast.ident; + let inner_ty = newtype_inner(&ast.data).expect(NEWTYPE_ONLY); + + let import = NumTraits::new(&ast); + + let impl_ = quote! { + impl #import::NumCast for #name { + #[inline] + fn from<T: #import::ToPrimitive>(n: T) -> Option<Self> { + <#inner_ty as #import::NumCast>::from(n).map(#name) + } + } + }; + + import.wrap("NumCast", &name, impl_).into() +} + +/// Derives [`num_traits::Zero`][zero] for newtypes. The inner type must already implement `Zero`. +/// +/// [zero]: https://docs.rs/num-traits/0.2/num_traits/identities/trait.Zero.html +#[proc_macro_derive(Zero, attributes(num_traits))] +pub fn zero(input: TokenStream) -> TokenStream { + let ast = parse!(input as syn::DeriveInput); + let name = &ast.ident; + let inner_ty = newtype_inner(&ast.data).expect(NEWTYPE_ONLY); + + let import = NumTraits::new(&ast); + + let impl_ = quote! { + impl #import::Zero for #name { + #[inline] + fn zero() -> Self { + #name(<#inner_ty as #import::Zero>::zero()) + } + #[inline] + fn is_zero(&self) -> bool { + <#inner_ty as #import::Zero>::is_zero(&self.0) + } + } + }; + + import.wrap("Zero", &name, impl_).into() +} + +/// Derives [`num_traits::One`][one] for newtypes. The inner type must already implement `One`. +/// +/// [one]: https://docs.rs/num-traits/0.2/num_traits/identities/trait.One.html +#[proc_macro_derive(One, attributes(num_traits))] +pub fn one(input: TokenStream) -> TokenStream { + let ast = parse!(input as syn::DeriveInput); + let name = &ast.ident; + let inner_ty = newtype_inner(&ast.data).expect(NEWTYPE_ONLY); + + let import = NumTraits::new(&ast); + + let impl_ = quote! { + impl #import::One for #name { + #[inline] + fn one() -> Self { + #name(<#inner_ty as #import::One>::one()) + } + #[inline] + fn is_one(&self) -> bool { + <#inner_ty as #import::One>::is_one(&self.0) + } + } + }; + + import.wrap("One", &name, impl_).into() +} + +/// Derives [`num_traits::Num`][num] for newtypes. The inner type must already implement `Num`. +/// +/// [num]: https://docs.rs/num-traits/0.2/num_traits/trait.Num.html +#[proc_macro_derive(Num, attributes(num_traits))] +pub fn num(input: TokenStream) -> TokenStream { + let ast = parse!(input as syn::DeriveInput); + let name = &ast.ident; + let inner_ty = newtype_inner(&ast.data).expect(NEWTYPE_ONLY); + + let import = NumTraits::new(&ast); + + let impl_ = quote! { + impl #import::Num for #name { + type FromStrRadixErr = <#inner_ty as #import::Num>::FromStrRadixErr; + #[inline] + fn from_str_radix(s: &str, radix: u32) -> Result<Self, Self::FromStrRadixErr> { + <#inner_ty as #import::Num>::from_str_radix(s, radix).map(#name) + } + } + }; + + import.wrap("Num", &name, impl_).into() +} + +/// Derives [`num_traits::Float`][float] for newtypes. The inner type must already implement +/// `Float`. +/// +/// [float]: https://docs.rs/num-traits/0.2/num_traits/float/trait.Float.html +#[proc_macro_derive(Float, attributes(num_traits))] +pub fn float(input: TokenStream) -> TokenStream { + let ast = parse!(input as syn::DeriveInput); + let name = &ast.ident; + let inner_ty = newtype_inner(&ast.data).expect(NEWTYPE_ONLY); + + let import = NumTraits::new(&ast); + + let impl_ = quote! { + impl #import::Float for #name { + #[inline] + fn nan() -> Self { + #name(<#inner_ty as #import::Float>::nan()) + } + #[inline] + fn infinity() -> Self { + #name(<#inner_ty as #import::Float>::infinity()) + } + #[inline] + fn neg_infinity() -> Self { + #name(<#inner_ty as #import::Float>::neg_infinity()) + } + #[inline] + fn neg_zero() -> Self { + #name(<#inner_ty as #import::Float>::neg_zero()) + } + #[inline] + fn min_value() -> Self { + #name(<#inner_ty as #import::Float>::min_value()) + } + #[inline] + fn min_positive_value() -> Self { + #name(<#inner_ty as #import::Float>::min_positive_value()) + } + #[inline] + fn max_value() -> Self { + #name(<#inner_ty as #import::Float>::max_value()) + } + #[inline] + fn is_nan(self) -> bool { + <#inner_ty as #import::Float>::is_nan(self.0) + } + #[inline] + fn is_infinite(self) -> bool { + <#inner_ty as #import::Float>::is_infinite(self.0) + } + #[inline] + fn is_finite(self) -> bool { + <#inner_ty as #import::Float>::is_finite(self.0) + } + #[inline] + fn is_normal(self) -> bool { + <#inner_ty as #import::Float>::is_normal(self.0) + } + #[inline] + fn classify(self) -> ::std::num::FpCategory { + <#inner_ty as #import::Float>::classify(self.0) + } + #[inline] + fn floor(self) -> Self { + #name(<#inner_ty as #import::Float>::floor(self.0)) + } + #[inline] + fn ceil(self) -> Self { + #name(<#inner_ty as #import::Float>::ceil(self.0)) + } + #[inline] + fn round(self) -> Self { + #name(<#inner_ty as #import::Float>::round(self.0)) + } + #[inline] + fn trunc(self) -> Self { + #name(<#inner_ty as #import::Float>::trunc(self.0)) + } + #[inline] + fn fract(self) -> Self { + #name(<#inner_ty as #import::Float>::fract(self.0)) + } + #[inline] + fn abs(self) -> Self { + #name(<#inner_ty as #import::Float>::abs(self.0)) + } + #[inline] + fn signum(self) -> Self { + #name(<#inner_ty as #import::Float>::signum(self.0)) + } + #[inline] + fn is_sign_positive(self) -> bool { + <#inner_ty as #import::Float>::is_sign_positive(self.0) + } + #[inline] + fn is_sign_negative(self) -> bool { + <#inner_ty as #import::Float>::is_sign_negative(self.0) + } + #[inline] + fn mul_add(self, a: Self, b: Self) -> Self { + #name(<#inner_ty as #import::Float>::mul_add(self.0, a.0, b.0)) + } + #[inline] + fn recip(self) -> Self { + #name(<#inner_ty as #import::Float>::recip(self.0)) + } + #[inline] + fn powi(self, n: i32) -> Self { + #name(<#inner_ty as #import::Float>::powi(self.0, n)) + } + #[inline] + fn powf(self, n: Self) -> Self { + #name(<#inner_ty as #import::Float>::powf(self.0, n.0)) + } + #[inline] + fn sqrt(self) -> Self { + #name(<#inner_ty as #import::Float>::sqrt(self.0)) + } + #[inline] + fn exp(self) -> Self { + #name(<#inner_ty as #import::Float>::exp(self.0)) + } + #[inline] + fn exp2(self) -> Self { + #name(<#inner_ty as #import::Float>::exp2(self.0)) + } + #[inline] + fn ln(self) -> Self { + #name(<#inner_ty as #import::Float>::ln(self.0)) + } + #[inline] + fn log(self, base: Self) -> Self { + #name(<#inner_ty as #import::Float>::log(self.0, base.0)) + } + #[inline] + fn log2(self) -> Self { + #name(<#inner_ty as #import::Float>::log2(self.0)) + } + #[inline] + fn log10(self) -> Self { + #name(<#inner_ty as #import::Float>::log10(self.0)) + } + #[inline] + fn max(self, other: Self) -> Self { + #name(<#inner_ty as #import::Float>::max(self.0, other.0)) + } + #[inline] + fn min(self, other: Self) -> Self { + #name(<#inner_ty as #import::Float>::min(self.0, other.0)) + } + #[inline] + fn abs_sub(self, other: Self) -> Self { + #name(<#inner_ty as #import::Float>::abs_sub(self.0, other.0)) + } + #[inline] + fn cbrt(self) -> Self { + #name(<#inner_ty as #import::Float>::cbrt(self.0)) + } + #[inline] + fn hypot(self, other: Self) -> Self { + #name(<#inner_ty as #import::Float>::hypot(self.0, other.0)) + } + #[inline] + fn sin(self) -> Self { + #name(<#inner_ty as #import::Float>::sin(self.0)) + } + #[inline] + fn cos(self) -> Self { + #name(<#inner_ty as #import::Float>::cos(self.0)) + } + #[inline] + fn tan(self) -> Self { + #name(<#inner_ty as #import::Float>::tan(self.0)) + } + #[inline] + fn asin(self) -> Self { + #name(<#inner_ty as #import::Float>::asin(self.0)) + } + #[inline] + fn acos(self) -> Self { + #name(<#inner_ty as #import::Float>::acos(self.0)) + } + #[inline] + fn atan(self) -> Self { + #name(<#inner_ty as #import::Float>::atan(self.0)) + } + #[inline] + fn atan2(self, other: Self) -> Self { + #name(<#inner_ty as #import::Float>::atan2(self.0, other.0)) + } + #[inline] + fn sin_cos(self) -> (Self, Self) { + let (x, y) = <#inner_ty as #import::Float>::sin_cos(self.0); + (#name(x), #name(y)) + } + #[inline] + fn exp_m1(self) -> Self { + #name(<#inner_ty as #import::Float>::exp_m1(self.0)) + } + #[inline] + fn ln_1p(self) -> Self { + #name(<#inner_ty as #import::Float>::ln_1p(self.0)) + } + #[inline] + fn sinh(self) -> Self { + #name(<#inner_ty as #import::Float>::sinh(self.0)) + } + #[inline] + fn cosh(self) -> Self { + #name(<#inner_ty as #import::Float>::cosh(self.0)) + } + #[inline] + fn tanh(self) -> Self { + #name(<#inner_ty as #import::Float>::tanh(self.0)) + } + #[inline] + fn asinh(self) -> Self { + #name(<#inner_ty as #import::Float>::asinh(self.0)) + } + #[inline] + fn acosh(self) -> Self { + #name(<#inner_ty as #import::Float>::acosh(self.0)) + } + #[inline] + fn atanh(self) -> Self { + #name(<#inner_ty as #import::Float>::atanh(self.0)) + } + #[inline] + fn integer_decode(self) -> (u64, i16, i8) { + <#inner_ty as #import::Float>::integer_decode(self.0) + } + #[inline] + fn epsilon() -> Self { + #name(<#inner_ty as #import::Float>::epsilon()) + } + #[inline] + fn to_degrees(self) -> Self { + #name(<#inner_ty as #import::Float>::to_degrees(self.0)) + } + #[inline] + fn to_radians(self) -> Self { + #name(<#inner_ty as #import::Float>::to_radians(self.0)) + } + } + }; + + import.wrap("Float", &name, impl_).into() +} + +mod test; diff --git a/third_party/rust/num-derive/src/test.rs b/third_party/rust/num-derive/src/test.rs new file mode 100644 index 0000000000..c4cd7fe528 --- /dev/null +++ b/third_party/rust/num-derive/src/test.rs @@ -0,0 +1,31 @@ +//! This module uses doc-tests on modules for `compile_fail` + +// We need "syn/full" to parse macros. +// Use `--nocapture` to check the quality of the error message. +#[cfg(not(feature = "full-syntax"))] +/// ```compile_fail +/// macro_rules! get_an_isize { +/// () => (0_isize) +/// } +/// +/// #[derive(num_derive::FromPrimitive)] +/// pub enum CLikeEnum { +/// VarA = get_an_isize!(), // error without "syn/full" +/// VarB = 2, +/// } +/// ``` +mod issue16 {} + +#[cfg(feature = "full-syntax")] +/// ``` +/// macro_rules! get_an_isize { +/// () => (0_isize) +/// } +/// +/// #[derive(num_derive::FromPrimitive)] +/// pub enum CLikeEnum { +/// VarA = get_an_isize!(), // ok with "syn/full" +/// VarB = 2, +/// } +/// ``` +mod issue16 {} diff --git a/third_party/rust/num-derive/tests/empty_enum.rs b/third_party/rust/num-derive/tests/empty_enum.rs new file mode 100644 index 0000000000..173996c8ed --- /dev/null +++ b/third_party/rust/num-derive/tests/empty_enum.rs @@ -0,0 +1,23 @@ +// Copyright 2013-2015 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. + +extern crate num as num_renamed; +#[macro_use] +extern crate num_derive; + +#[derive(Debug, PartialEq, FromPrimitive, ToPrimitive)] +enum Color {} + +#[test] +fn test_empty_enum() { + let v: [Option<Color>; 1] = [num_renamed::FromPrimitive::from_u64(0)]; + + assert_eq!(v, [None]); +} diff --git a/third_party/rust/num-derive/tests/issue-6.rs b/third_party/rust/num-derive/tests/issue-6.rs new file mode 100644 index 0000000000..9eae7fb3f5 --- /dev/null +++ b/third_party/rust/num-derive/tests/issue-6.rs @@ -0,0 +1,17 @@ +#![deny(trivial_numeric_casts)] + +#[macro_use] +extern crate num_derive; + +#[derive(FromPrimitive, ToPrimitive)] +pub enum SomeEnum { + A = 1, +} + +#[test] +fn test_trivial_numeric_casts() { + use num::{FromPrimitive, ToPrimitive}; + assert!(SomeEnum::from_u64(1).is_some()); + assert!(SomeEnum::from_i64(-1).is_none()); + assert_eq!(SomeEnum::A.to_u64(), Some(1)); +} diff --git a/third_party/rust/num-derive/tests/issue-9.rs b/third_party/rust/num-derive/tests/issue-9.rs new file mode 100644 index 0000000000..30c04d2f46 --- /dev/null +++ b/third_party/rust/num-derive/tests/issue-9.rs @@ -0,0 +1,18 @@ +#![deny(unused_qualifications)] + +#[macro_use] +extern crate num_derive; +use num::FromPrimitive; +use num::ToPrimitive; + +#[derive(FromPrimitive, ToPrimitive)] +pub enum SomeEnum { + A = 1, +} + +#[test] +fn test_unused_qualifications() { + assert!(SomeEnum::from_u64(1).is_some()); + assert!(SomeEnum::from_i64(-1).is_none()); + assert!(SomeEnum::A.to_i64().is_some()); +} diff --git a/third_party/rust/num-derive/tests/newtype-2015.rs b/third_party/rust/num-derive/tests/newtype-2015.rs new file mode 100644 index 0000000000..2b581907ec --- /dev/null +++ b/third_party/rust/num-derive/tests/newtype-2015.rs @@ -0,0 +1,2 @@ +// Same source, just compiled for 2015 edition +include!("newtype.rs"); diff --git a/third_party/rust/num-derive/tests/newtype.rs b/third_party/rust/num-derive/tests/newtype.rs new file mode 100644 index 0000000000..6eafd0960b --- /dev/null +++ b/third_party/rust/num-derive/tests/newtype.rs @@ -0,0 +1,89 @@ +extern crate num as num_renamed; +#[macro_use] +extern crate num_derive; + +use crate::num_renamed::{Float, FromPrimitive, Num, NumCast, One, ToPrimitive, Zero}; +use std::ops::Neg; + +#[derive( + Debug, + Clone, + Copy, + PartialEq, + PartialOrd, + ToPrimitive, + FromPrimitive, + NumOps, + NumCast, + One, + Zero, + Num, + Float, +)] +struct MyFloat(f64); + +impl Neg for MyFloat { + type Output = MyFloat; + fn neg(self) -> Self { + MyFloat(self.0.neg()) + } +} + +#[test] +fn test_from_primitive() { + assert_eq!(MyFloat::from_u32(25), Some(MyFloat(25.0))); +} + +#[test] +fn test_from_primitive_128() { + assert_eq!( + MyFloat::from_i128(std::i128::MIN), + Some(MyFloat((-2.0).powi(127))) + ); +} + +#[test] +fn test_to_primitive() { + assert_eq!(MyFloat(25.0).to_u32(), Some(25)); +} + +#[test] +fn test_to_primitive_128() { + let f = MyFloat::from_f32(std::f32::MAX).unwrap(); + assert_eq!(f.to_i128(), None); + assert_eq!(f.to_u128(), Some(0xffff_ff00_0000_0000_0000_0000_0000_0000)); +} + +#[test] +fn test_num_ops() { + assert_eq!(MyFloat(25.0) + MyFloat(10.0), MyFloat(35.0)); + assert_eq!(MyFloat(25.0) - MyFloat(10.0), MyFloat(15.0)); + assert_eq!(MyFloat(25.0) * MyFloat(2.0), MyFloat(50.0)); + assert_eq!(MyFloat(25.0) / MyFloat(10.0), MyFloat(2.5)); + assert_eq!(MyFloat(25.0) % MyFloat(10.0), MyFloat(5.0)); +} + +#[test] +fn test_num_cast() { + assert_eq!(<MyFloat as NumCast>::from(25u8), Some(MyFloat(25.0))); +} + +#[test] +fn test_zero() { + assert_eq!(MyFloat::zero(), MyFloat(0.0)); +} + +#[test] +fn test_one() { + assert_eq!(MyFloat::one(), MyFloat(1.0)); +} + +#[test] +fn test_num() { + assert_eq!(MyFloat::from_str_radix("25", 10).ok(), Some(MyFloat(25.0))); +} + +#[test] +fn test_float() { + assert_eq!(MyFloat(4.0).log(MyFloat(2.0)), MyFloat(2.0)); +} diff --git a/third_party/rust/num-derive/tests/num_derive_without_num.rs b/third_party/rust/num-derive/tests/num_derive_without_num.rs new file mode 100644 index 0000000000..edebbecbfa --- /dev/null +++ b/third_party/rust/num-derive/tests/num_derive_without_num.rs @@ -0,0 +1,20 @@ +// Copyright 2013-2015 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. + +#[macro_use] +extern crate num_derive; + +#[derive(Debug, FromPrimitive, ToPrimitive)] +enum Direction { + Up, + Down, + Left, + Right, +} diff --git a/third_party/rust/num-derive/tests/trivial-2015.rs b/third_party/rust/num-derive/tests/trivial-2015.rs new file mode 100644 index 0000000000..8309f0e889 --- /dev/null +++ b/third_party/rust/num-derive/tests/trivial-2015.rs @@ -0,0 +1,2 @@ +// Same source, just compiled for 2015 edition +include!("trivial.rs"); diff --git a/third_party/rust/num-derive/tests/trivial.rs b/third_party/rust/num-derive/tests/trivial.rs new file mode 100644 index 0000000000..d3b56b6a25 --- /dev/null +++ b/third_party/rust/num-derive/tests/trivial.rs @@ -0,0 +1,64 @@ +// Copyright 2013-2015 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. + +extern crate num as num_renamed; +#[macro_use] +extern crate num_derive; + +#[derive(Debug, PartialEq, FromPrimitive, ToPrimitive)] +enum Color { + Red, + Blue, + Green, +} + +#[test] +fn test_from_primitive_for_trivial_case() { + let v: [Option<Color>; 4] = [ + num_renamed::FromPrimitive::from_u64(0), + num_renamed::FromPrimitive::from_u64(1), + num_renamed::FromPrimitive::from_u64(2), + num_renamed::FromPrimitive::from_u64(3), + ]; + + assert_eq!( + v, + [ + Some(Color::Red), + Some(Color::Blue), + Some(Color::Green), + None + ] + ); +} + +#[test] +fn test_to_primitive_for_trivial_case() { + let v: [Option<u64>; 3] = [ + num_renamed::ToPrimitive::to_u64(&Color::Red), + num_renamed::ToPrimitive::to_u64(&Color::Blue), + num_renamed::ToPrimitive::to_u64(&Color::Green), + ]; + + assert_eq!(v, [Some(0), Some(1), Some(2)]); +} + +#[test] +fn test_reflexive_for_trivial_case() { + let before: [u64; 3] = [0, 1, 2]; + let after: Vec<Option<u64>> = before + .iter() + .map(|&x| -> Option<Color> { num_renamed::FromPrimitive::from_u64(x) }) + .map(|x| x.and_then(|x| num_renamed::ToPrimitive::to_u64(&x))) + .collect(); + let before = before.iter().cloned().map(Some).collect::<Vec<_>>(); + + assert_eq!(before, after); +} diff --git a/third_party/rust/num-derive/tests/with_custom_values.rs b/third_party/rust/num-derive/tests/with_custom_values.rs new file mode 100644 index 0000000000..94c84458be --- /dev/null +++ b/third_party/rust/num-derive/tests/with_custom_values.rs @@ -0,0 +1,70 @@ +// Copyright 2013-2015 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. + +#![cfg(feature = "full-syntax")] + +extern crate num as num_renamed; +#[macro_use] +extern crate num_derive; + +#[derive(Debug, PartialEq, FromPrimitive, ToPrimitive)] +enum Color { + Red, + Blue = 5, + Green, + Alpha = (-3 - (-5isize)) - 10, +} + +#[test] +fn test_from_primitive_for_enum_with_custom_value() { + let v: [Option<Color>; 5] = [ + num_renamed::FromPrimitive::from_u64(0), + num_renamed::FromPrimitive::from_u64(5), + num_renamed::FromPrimitive::from_u64(6), + num_renamed::FromPrimitive::from_u64(-8isize as u64), + num_renamed::FromPrimitive::from_u64(3), + ]; + + assert_eq!( + v, + [ + Some(Color::Red), + Some(Color::Blue), + Some(Color::Green), + Some(Color::Alpha), + None + ] + ); +} + +#[test] +fn test_to_primitive_for_enum_with_custom_value() { + let v: [Option<u64>; 4] = [ + num_renamed::ToPrimitive::to_u64(&Color::Red), + num_renamed::ToPrimitive::to_u64(&Color::Blue), + num_renamed::ToPrimitive::to_u64(&Color::Green), + num_renamed::ToPrimitive::to_u64(&Color::Alpha), + ]; + + assert_eq!(v, [Some(0), Some(5), Some(6), Some(-8isize as u64)]); +} + +#[test] +fn test_reflexive_for_enum_with_custom_value() { + let before: [u64; 3] = [0, 5, 6]; + let after: Vec<Option<u64>> = before + .iter() + .map(|&x| -> Option<Color> { num_renamed::FromPrimitive::from_u64(x) }) + .map(|x| x.and_then(|x| num_renamed::ToPrimitive::to_u64(&x))) + .collect(); + let before = before.iter().cloned().map(Some).collect::<Vec<_>>(); + + assert_eq!(before, after); +} |