num-derive-0.4.2/.cargo_vcs_info.json0000644000000001360000000000100131120ustar { "git": { "sha1": "7cc33515dd2ae0eb43c5795c50ce49c554e8ba02" }, "path_in_vcs": "" }num-derive-0.4.2/.gitignore000064400000000000000000000000221046102023000136640ustar 00000000000000Cargo.lock target num-derive-0.4.2/Cargo.toml0000644000000026130000000000100111120ustar # 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 are reading this file be aware that the original Cargo.toml # will likely look very different (and much more reasonable). # See Cargo.toml.orig for the original contents. [package] edition = "2021" rust-version = "1.56.0" name = "num-derive" version = "0.4.2" authors = ["The Rust Project Developers"] exclude = [ "/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 = "newtype-2018" edition = "2018" [[test]] name = "trivial-2015" edition = "2015" [[test]] name = "trivial-2018" edition = "2018" [dependencies.proc-macro2] version = "1" [dependencies.quote] version = "1" [dependencies.syn] version = "2.0.5" [dev-dependencies.num] version = "0.4" [dev-dependencies.num-traits] version = "0.2" num-derive-0.4.2/Cargo.toml.orig000064400000000000000000000017151046102023000145750ustar 00000000000000[package] authors = ["The Rust Project Developers"] description = "Numeric syntax extensions" documentation = "https://docs.rs/num-derive" homepage = "https://github.com/rust-num/num-derive" keywords = ["mathematics", "numerics"] categories = [ "science" ] license = "MIT OR Apache-2.0" name = "num-derive" repository = "https://github.com/rust-num/num-derive" version = "0.4.2" readme = "README.md" exclude = ["/ci/*", "/.github/*"] edition = "2021" rust-version = "1.56.0" [dependencies] proc-macro2 = "1" quote = "1" syn = "2.0.5" [dev-dependencies] num = "0.4" num-traits = "0.2" [lib] name = "num_derive" proc-macro = true test = false # Most of the tests are left implicily detected, compiled for Rust 2021, # but let's try a few of them with the older editions too. [[test]] name = "newtype-2015" edition = "2015" [[test]] name = "newtype-2018" edition = "2018" [[test]] name = "trivial-2015" edition = "2015" [[test]] name = "trivial-2018" edition = "2018" num-derive-0.4.2/LICENSE-APACHE000064400000000000000000000251371046102023000136360ustar 00000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. 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See the License for the specific language governing permissions and limitations under the License. num-derive-0.4.2/LICENSE-MIT000064400000000000000000000020571046102023000133420ustar 00000000000000Copyright (c) 2014 The Rust Project Developers Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. 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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. num-derive-0.4.2/README.md000064400000000000000000000035721046102023000131700ustar 00000000000000# num-derive [![crate](https://img.shields.io/crates/v/num-derive.svg)](https://crates.io/crates/num-derive) [![documentation](https://docs.rs/num-derive/badge.svg)](https://docs.rs/num-derive) [![minimum rustc 1.56](https://img.shields.io/badge/rustc-1.56+-red.svg)](https://rust-lang.github.io/rfcs/2495-min-rust-version.html) [![build status](https://github.com/rust-num/num-derive/workflows/master/badge.svg)](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 = "0.4" ``` 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 1.56 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. num-derive-0.4.2/RELEASES.md000064400000000000000000000075351046102023000134410ustar 00000000000000# Release 0.4.2 (2024-02-06) - [Use anon-const to avoid RFC 3373 warnings.][62] [62]: https://github.com/rust-num/num-derive/pull/62 # Release 0.4.1 (2023-10-07) - [Make `Float` work with `no_std`][56] -- thanks @vkahl! - [Emit full paths for `Option` and `Result`.][57] - [Add derive macro for `num_traits::Signed` and `Unsigned`][55] -- thanks @tdelabro! [55]: https://github.com/rust-num/num-derive/pull/55 [56]: https://github.com/rust-num/num-derive/pull/56 [57]: https://github.com/rust-num/num-derive/pull/57 # Release 0.4.0 (2023-06-29) - [Update to syn-2][54] -- thanks @maurer! - This raises the minimum supported rustc to 1.56. - The "full-syntax" feature has also been removed. [54]: https://github.com/rust-num/num-derive/pull/54 # 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`, `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! num-derive-0.4.2/src/lib.rs000064400000000000000000001017411046102023000136110ustar 00000000000000// 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 or the MIT license // , 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 macro_rules! parse { ($tokens:ident as $type:ty) => { match syn::parse::<$type>($tokens) { Ok(parsed) => parsed, Err(error) => { 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 anonymous 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 anon_const_trick(exp: TokenStream2) -> TokenStream2 { quote! { #[allow(non_upper_case_globals, unused_qualifications)] const _: () = { #[allow(clippy::useless_attribute)] #[allow(rust_2018_idioms)] extern crate num_traits as _num_traits; #exp }; } } // If `data` is a newtype, return the type it's wrapping. fn newtype_inner(data: &syn::Data) -> Option { 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 attr.path().is_ident("num_traits") { if let Ok(syn::MetaNameValue { value: syn::Expr::Lit(syn::ExprLit { lit: syn::Lit::Str(ref lit_str), .. }), .. }) = attr.meta.require_name_value() { 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, output: TokenStream2) -> TokenStream2 { if self.explicit { output } else { anon_const_trick(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) -> ::core::option::Option { <#inner_ty as #import::FromPrimitive>::from_i64(n).map(#name) } #[inline] fn from_u64(n: u64) -> ::core::option::Option { <#inner_ty as #import::FromPrimitive>::from_u64(n).map(#name) } #[inline] fn from_isize(n: isize) -> ::core::option::Option { <#inner_ty as #import::FromPrimitive>::from_isize(n).map(#name) } #[inline] fn from_i8(n: i8) -> ::core::option::Option { <#inner_ty as #import::FromPrimitive>::from_i8(n).map(#name) } #[inline] fn from_i16(n: i16) -> ::core::option::Option { <#inner_ty as #import::FromPrimitive>::from_i16(n).map(#name) } #[inline] fn from_i32(n: i32) -> ::core::option::Option { <#inner_ty as #import::FromPrimitive>::from_i32(n).map(#name) } #[inline] fn from_i128(n: i128) -> ::core::option::Option { <#inner_ty as #import::FromPrimitive>::from_i128(n).map(#name) } #[inline] fn from_usize(n: usize) -> ::core::option::Option { <#inner_ty as #import::FromPrimitive>::from_usize(n).map(#name) } #[inline] fn from_u8(n: u8) -> ::core::option::Option { <#inner_ty as #import::FromPrimitive>::from_u8(n).map(#name) } #[inline] fn from_u16(n: u16) -> ::core::option::Option { <#inner_ty as #import::FromPrimitive>::from_u16(n).map(#name) } #[inline] fn from_u32(n: u32) -> ::core::option::Option { <#inner_ty as #import::FromPrimitive>::from_u32(n).map(#name) } #[inline] fn from_u128(n: u128) -> ::core::option::Option { <#inner_ty as #import::FromPrimitive>::from_u128(n).map(#name) } #[inline] fn from_f32(n: f32) -> ::core::option::Option { <#inner_ty as #import::FromPrimitive>::from_f32(n).map(#name) } #[inline] fn from_f64(n: f64) -> ::core::option::Option { <#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 { ::core::option::Option::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) -> ::core::option::Option { #(#clauses else)* { ::core::option::Option::None } } #[inline] fn from_u64(n: u64) -> ::core::option::Option { Self::from_i64(n as i64) } } } }; import.wrap(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) -> ::core::option::Option { <#inner_ty as #import::ToPrimitive>::to_i64(&self.0) } #[inline] fn to_u64(&self) -> ::core::option::Option { <#inner_ty as #import::ToPrimitive>::to_u64(&self.0) } #[inline] fn to_isize(&self) -> ::core::option::Option { <#inner_ty as #import::ToPrimitive>::to_isize(&self.0) } #[inline] fn to_i8(&self) -> ::core::option::Option { <#inner_ty as #import::ToPrimitive>::to_i8(&self.0) } #[inline] fn to_i16(&self) -> ::core::option::Option { <#inner_ty as #import::ToPrimitive>::to_i16(&self.0) } #[inline] fn to_i32(&self) -> ::core::option::Option { <#inner_ty as #import::ToPrimitive>::to_i32(&self.0) } #[inline] fn to_i128(&self) -> ::core::option::Option { <#inner_ty as #import::ToPrimitive>::to_i128(&self.0) } #[inline] fn to_usize(&self) -> ::core::option::Option { <#inner_ty as #import::ToPrimitive>::to_usize(&self.0) } #[inline] fn to_u8(&self) -> ::core::option::Option { <#inner_ty as #import::ToPrimitive>::to_u8(&self.0) } #[inline] fn to_u16(&self) -> ::core::option::Option { <#inner_ty as #import::ToPrimitive>::to_u16(&self.0) } #[inline] fn to_u32(&self) -> ::core::option::Option { <#inner_ty as #import::ToPrimitive>::to_u32(&self.0) } #[inline] fn to_u128(&self) -> ::core::option::Option { <#inner_ty as #import::ToPrimitive>::to_u128(&self.0) } #[inline] fn to_f32(&self) -> ::core::option::Option { <#inner_ty as #import::ToPrimitive>::to_f32(&self.0) } #[inline] fn to_f64(&self) -> ::core::option::Option { <#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! { ::core::option::Option::Some(match *self { #(#variants,)* }) } }; quote! { impl #import::ToPrimitive for #name { #[inline] #[allow(trivial_numeric_casts)] fn to_i64(&self) -> ::core::option::Option { #match_expr } #[inline] fn to_u64(&self) -> ::core::option::Option { self.to_i64().map(|x| x as u64) } } } }; import.wrap(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(n: T) -> ::core::option::Option { <#inner_ty as #import::NumCast>::from(n).map(#name) } } }; import.wrap(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(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(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) -> ::core::result::Result { <#inner_ty as #import::Num>::from_str_radix(s, radix).map(#name) } } }; import.wrap(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) -> ::core::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(impl_).into() } /// Derives [`num_traits::Signed`][signed] for newtypes. The inner type must already implement /// `Signed`. /// /// [signed]: https://docs.rs/num-traits/0.2/num_traits/sign/trait.Signed.html #[proc_macro_derive(Signed, attributes(num_traits))] pub fn signed(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::Signed for #name { #[inline] fn abs(&self) -> Self { #name(<#inner_ty as #import::Signed>::abs(&self.0)) } #[inline] fn abs_sub(&self, other: &Self) -> Self { #name(<#inner_ty as #import::Signed>::abs_sub(&self.0, &other.0)) } #[inline] fn signum(&self) -> Self { #name(<#inner_ty as #import::Signed>::signum(&self.0)) } #[inline] fn is_positive(&self) -> bool { <#inner_ty as #import::Signed>::is_positive(&self.0) } #[inline] fn is_negative(&self) -> bool { <#inner_ty as #import::Signed>::is_negative(&self.0) } } }; import.wrap(impl_).into() } /// Derives [`num_traits::Unsigned`][unsigned]. The inner type must already implement /// `Unsigned`. /// /// [unsigned]: https://docs.rs/num/latest/num/traits/trait.Unsigned.html #[proc_macro_derive(Unsigned, attributes(num_traits))] pub fn unsigned(input: TokenStream) -> TokenStream { let ast = parse!(input as syn::DeriveInput); let name = &ast.ident; let import = NumTraits::new(&ast); let impl_ = quote! { impl #import::Unsigned for #name {} }; import.wrap(impl_).into() } num-derive-0.4.2/tests/empty_enum.rs000064400000000000000000000013571046102023000156020ustar 00000000000000// 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 or the MIT license // , 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; 1] = [num_renamed::FromPrimitive::from_u64(0)]; assert_eq!(v, [None]); } num-derive-0.4.2/tests/issue-16.rs000064400000000000000000000002501046102023000147630ustar 00000000000000macro_rules! get_an_isize { () => { 0_isize }; } #[derive(num_derive::FromPrimitive)] pub enum CLikeEnum { VarA = get_an_isize!(), VarB = 2, } num-derive-0.4.2/tests/issue-6.rs000064400000000000000000000005631046102023000147110ustar 00000000000000#![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)); } num-derive-0.4.2/tests/issue-9.rs000064400000000000000000000005641046102023000147150ustar 00000000000000#![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()); } num-derive-0.4.2/tests/newtype-2015.rs000064400000000000000000000001071046102023000154700ustar 00000000000000// Same source, just compiled for 2015 edition include!("newtype.rs"); num-derive-0.4.2/tests/newtype-2018.rs000064400000000000000000000001071046102023000154730ustar 00000000000000// Same source, just compiled for 2018 edition include!("newtype.rs"); num-derive-0.4.2/tests/newtype.rs000064400000000000000000000041531046102023000151100ustar 00000000000000extern crate num as num_renamed; #[macro_use] extern crate num_derive; use crate::num_renamed::{ Float, FromPrimitive, Num, NumCast, One, Signed, ToPrimitive, Unsigned, Zero, }; use std::ops::Neg; #[derive(PartialEq, Zero, One, NumOps, Num, Unsigned)] struct MyNum(u32); #[test] fn test_derive_unsigned_works() { fn do_nothing_on_unsigned(_input: impl Unsigned) {} let x = MyNum(42); do_nothing_on_unsigned(x); } #[derive( Debug, Clone, Copy, PartialEq, PartialOrd, ToPrimitive, FromPrimitive, NumOps, NumCast, One, Zero, Num, Float, Signed, )] 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!(::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)); } #[test] fn test_signed() { assert!(MyFloat(-2.0).is_negative()) } num-derive-0.4.2/tests/no_implicit_prelude.rs000064400000000000000000000003511046102023000174370ustar 00000000000000#![no_implicit_prelude] use ::num_derive::*; #[derive(FromPrimitive, ToPrimitive)] enum Color { Red, Blue, Green, } #[derive(FromPrimitive, ToPrimitive, NumCast, PartialEq, Zero, One, NumOps, Num)] struct NewI32(i32); num-derive-0.4.2/tests/num_derive_without_num.rs000064400000000000000000000011461046102023000202130ustar 00000000000000// 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 or the MIT license // , 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, } num-derive-0.4.2/tests/trivial-2015.rs000064400000000000000000000001071046102023000154470ustar 00000000000000// Same source, just compiled for 2015 edition include!("trivial.rs"); num-derive-0.4.2/tests/trivial-2018.rs000064400000000000000000000001071046102023000154520ustar 00000000000000// Same source, just compiled for 2018 edition include!("trivial.rs"); num-derive-0.4.2/tests/trivial.rs000064400000000000000000000034461046102023000150730ustar 00000000000000// 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 or the MIT license // , 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; 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; 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> = before .iter() .map(|&x| -> Option { 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::>(); assert_eq!(before, after); } num-derive-0.4.2/tests/with_custom_values.rs000064400000000000000000000040301046102023000173330ustar 00000000000000// 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 or the MIT license // , 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 = 5, Green, Alpha = (-3 - (-5isize)) - 10, } #[test] fn test_from_primitive_for_enum_with_custom_value() { let v: [Option; 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; 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> = before .iter() .map(|&x| -> Option { 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::>(); assert_eq!(before, after); }