cast-0.2.3/.gitignore010064400017500001750000000000341356404311700126600ustar0000000000000000*.rs.bk Cargo.lock target/* cast-0.2.3/.travis.yml010064400017500001750000000007271356410467400130200ustar0000000000000000language: rust matrix: include: # MSRV - env: TARGET=x86_64-unknown-linux-gnu rust: 1.13.0 # 32-bit - env: TARGET=i686-unknown-linux-musl - env: TARGET=x86_64-unknown-linux-gnu before_install: set -e install: - bash ci/install.sh script: - bash ci/script.sh after_script: set +e cache: cargo before_cache: - chmod -R a+r $HOME/.cargo branches: only: - staging - trying notifications: email: on_success: never cast-0.2.3/CHANGELOG.md010064400017500001750000000025361356410467400125200ustar0000000000000000# Change Log All notable changes to this project will be documented in this file. The format is based on [Keep a Changelog](http://keepachangelog.com/) and this project adheres to [Semantic Versioning](http://semver.org/). ## [Unreleased] ## [v0.2.3] - 2018-11-17 ### Changed - Documented the guaranteed MRSV to be 1.13 - The `x128` feature now works on *stable* Rust 1.26+ ### Fixed - Overflow and underflow checks when casting a float to an unsigned integer ## [v0.2.2] - 2017-05-07 ### Fixed - UB in the checked cast from `f32` to `u128`. ## [v0.2.1] - 2017-05-06 ### Added - Support for 128-bit integers, behind the `x128` Cargo feature (nightly needed). ## [v0.2.0] - 2017-02-08 ### Added - Now `cast::Error` implements the `std::error::Error` trait among other traits like `Display`, `Clone`, etc. ### Changed - [breaking-change] This crate now depends on the `std` crate by default but you can make it `no_std` by opting out of the `std` Cargo feature. ## v0.1.0 - 2016-02-07 Initial release [Unreleased]: https://github.com/japaric/cast.rs/compare/v0.2.3...HEAD [v0.2.3]: https://github.com/japaric/cast.rs/compare/v0.2.2...v0.2.3 [v0.2.2]: https://github.com/japaric/cast.rs/compare/v0.2.1...v0.2.2 [v0.2.1]: https://github.com/japaric/cast.rs/compare/v0.2.0...v0.2.1 [v0.2.0]: https://github.com/japaric/cast.rs/compare/v0.1.0...v0.2.0 cast-0.2.3/Cargo.toml.orig010064400017500001750000000012521356410467400135700ustar0000000000000000[package] authors = ["Jorge Aparicio "] build = "build.rs" description = "Ergonomic, checked cast functions for primitive types" documentation = "https://docs.rs/cast" keywords = ["checked", "cast", "primitive", "integer", "float"] license = "MIT OR Apache-2.0" name = "cast" repository = "https://github.com/japaric/cast.rs" version = "0.2.3" [features] # Assume we should use `std` unless asked to do otherwise. default = ["std"] # Enable this to get a std::error::Error impl for convenient use with other # libraries. std = [] # Enable this for i128/u128 support x128 = [] [build-dependencies] rustc_version = "0.2.3" [dev-dependencies] quickcheck = "0.9.0" cast-0.2.3/Cargo.toml0000644000000020150000000000000100230ustar00# 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] name = "cast" version = "0.2.3" authors = ["Jorge Aparicio "] build = "build.rs" description = "Ergonomic, checked cast functions for primitive types" documentation = "https://docs.rs/cast" keywords = ["checked", "cast", "primitive", "integer", "float"] license = "MIT OR Apache-2.0" repository = "https://github.com/japaric/cast.rs" [dev-dependencies.quickcheck] version = "0.9.0" [build-dependencies.rustc_version] version = "0.2.3" [features] default = ["std"] std = [] x128 = [] cast-0.2.3/LICENSE-APACHE010064400017500001750000000251371356404311700126270ustar0000000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. 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See the License for the specific language governing permissions and limitations under the License. cast-0.2.3/LICENSE-MIT010064400017500001750000000020471356404311700123320ustar0000000000000000Copyright (c) 2014-2017 Jorge Aparicio 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. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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. cast-0.2.3/README.md010064400017500001750000000025471356404311700121620ustar0000000000000000[![crates.io](https://img.shields.io/crates/d/cast.svg)](https://crates.io/crates/cast) [![crates.io](https://img.shields.io/crates/v/cast.svg)](https://crates.io/crates/cast) # `cast` > Ergonomic, checked cast functions for primitive types ``` rust extern crate cast; // `u8` and `u16` are checked cast functions, use them to cast from any numeric // primitive to `u8`/`u16` respectively use cast::{u8, u16, Error}; // Infallible operations, like integer promotion, are equivalent to a normal // cast with `as` assert_eq!(u16(0u8), 0u16); // Everything else will return a `Result` depending on the success of the // operation assert_eq!(u8(0u16), Ok(0u8)); assert_eq!(u8(256u16), Err(Error::Overflow)); assert_eq!(u8(-1i8), Err(Error::Underflow)); assert_eq!(u8(1. / 0.), Err(Error::Infinite)); assert_eq!(u8(0. / 0.), Err(Error::NaN)); ``` ## [API docs](https://docs.rs/cast) ## License Licensed under either of - Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0) - MIT license ([LICENSE-MIT](LICENSE-MIT) or 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. cast-0.2.3/build.rs010064400017500001750000000003001356410467400123370ustar0000000000000000extern crate rustc_version; fn main() { let vers = rustc_version::version().unwrap(); if vers.major == 1 && vers.minor >= 26 { println!("cargo:rustc-cfg=stable_i128") } } cast-0.2.3/ci/install.sh010064400017500001750000000002031356410467400132710ustar0000000000000000set -euxo pipefail main() { if [ $TARGET != x86_64-unknown-linux-gnu ]; then rustup target add $TARGET fi } main cast-0.2.3/ci/script.sh010064400017500001750000000016761356410467400131460ustar0000000000000000set -euxo pipefail main() { # not MSRV if [ $TRAVIS_RUST_VERSION != 1.13.0 ]; then cargo check --target $TARGET --no-default-features cargo test --features x128 --target $TARGET cargo test --features x128 --target $TARGET --release else cargo build --target $TARGET --no-default-features cargo build --target $TARGET fi } # fake Travis variables to be able to run this on a local machine if [ -z ${TRAVIS_BRANCH-} ]; then TRAVIS_BRANCH=staging fi if [ -z ${TRAVIS_PULL_REQUEST-} ]; then TRAVIS_PULL_REQUEST=false fi if [ -z ${TRAVIS_RUST_VERSION-} ]; then case $(rustc -V) in *nightly*) TRAVIS_RUST_VERSION=nightly ;; *beta*) TRAVIS_RUST_VERSION=beta ;; *) TRAVIS_RUST_VERSION=stable ;; esac fi if [ -z ${TARGET-} ]; then TARGET=$(rustc -Vv | grep host | cut -d ' ' -f2) fi main cast-0.2.3/src/lib.rs010064400017500001750000000413531356410467400126120ustar0000000000000000//! Ergonomic, checked cast functions for primitive types //! //! This crate provides one checked cast function for each numeric primitive. //! Use these functions to perform a cast from any other numeric primitive: //! //! ``` //! extern crate cast; //! //! use cast::{u8, u16, Error}; //! //! # fn main() { //! // Infallible operations, like integer promotion, are equivalent to a normal //! // cast with `as` //! assert_eq!(u16(0u8), 0u16); //! //! // Everything else will return a `Result` depending on the success of the //! // operation //! assert_eq!(u8(0u16), Ok(0u8)); //! assert_eq!(u8(256u16), Err(Error::Overflow)); //! assert_eq!(u8(-1i8), Err(Error::Underflow)); //! assert_eq!(u8(1. / 0.), Err(Error::Infinite)); //! assert_eq!(u8(0. / 0.), Err(Error::NaN)); //! # } //! ``` //! //! There are no namespace problems between these functions, the "primitive //! modules" in `core`/`std` and the built-in primitive types, so all them can //! be in the same scope: //! //! ``` //! extern crate cast; //! //! use std::u8; //! use cast::{u8, u16}; //! //! # fn main() { //! // `u8` as a type //! let x: u8 = 0; //! // `u8` as a module //! let y = u16(u8::MAX); //! // `u8` as a function //! let z = u8(y).unwrap(); //! # } //! ``` //! //! The checked cast functionality is also usable with type aliases via the //! `cast` static method: //! //! ``` //! extern crate cast; //! //! use std::os::raw::c_ulonglong; //! // NOTE avoid shadowing `std::convert::From` - cf. rust-lang/rfcs#1311 //! use cast::From as _0; //! //! # fn main() { //! assert_eq!(c_ulonglong::cast(0u8), 0u64); //! # } //! ``` //! //! This crate also provides a `From` trait that can be used, for example, //! to create a generic function that accepts any type that can be infallibly //! casted to `u32`. //! //! ``` //! extern crate cast; //! //! fn to_u32(x: T) -> u32 //! // reads as: "where u32 can be casted from T with output u32" //! where u32: cast::From, //! { //! cast::u32(x) //! } //! //! # fn main() { //! assert_eq!(to_u32(0u8), 0u32); //! assert_eq!(to_u32(1u16), 1u32); //! assert_eq!(to_u32(2u32), 2u32); //! //! // to_u32(-1i32); // Compile error //! # } //! ``` //! //! ## Minimal Supported Rust Version //! //! This crate is guaranteed to compile on stable Rust 1.13 and up. It *might* compile on older //! versions but that may change in any new patch release. //! //! ## Building without `std` //! //! This crate can be used without Rust's `std` crate by declaring it as //! follows in your `Cargo.toml`: //! //! ``` toml //! cast = { version = "*", default-features = false } //! ``` #![deny(missing_docs)] #![deny(warnings)] #![allow(const_err)] #![cfg_attr(not(feature = "std"), no_std)] #![cfg_attr(all(feature = "x128", not(stable_i128)), feature(i128_type, i128))] #[cfg(feature = "std")] extern crate core; #[cfg(test)] #[macro_use] extern crate quickcheck; use core::fmt; #[cfg(feature = "std")] use std::error; #[cfg(test)] mod test; /// Cast errors #[derive(Clone, Copy, Debug, Eq, PartialEq)] pub enum Error { /// Infinite value casted to a type that can only represent finite values Infinite, /// NaN value casted to a type that can't represent a NaN value NaN, /// Source value is greater than the maximum value that the destination type /// can hold Overflow, /// Source value is smaller than the minimum value that the destination type /// can hold Underflow, } impl Error { /// A private helper function that implements `description`, because /// `description` is only available when we have `std` enabled. fn description_helper(&self) -> &str { match *self { Error::Infinite => "Cannot store infinite value in finite type", Error::NaN => "Cannot store NaN in type which does not support it", Error::Overflow => "Overflow during numeric conversion", Error::Underflow => "Underflow during numeric conversion", } } } impl fmt::Display for Error { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { write!(f, "{}", self.description_helper()) } } #[cfg(feature = "std")] impl error::Error for Error { fn description(&self) -> &str { self.description_helper() } } /// The "cast from" operation pub trait From { /// The result of the cast operation: either `Self` or `Result` type Output; /// Checked cast from `Src` to `Self` fn cast(Src) -> Self::Output; } macro_rules! fns { ($($ty:ident),+) => { $( /// Checked cast function #[inline] pub fn $ty(x: T) -> <$ty as From>::Output where $ty: From { <$ty as From>::cast(x) } )+ } } fns!(f32, f64, i8, i16, i32, i64, isize, u8, u16, u32, u64, usize); #[cfg(feature = "x128")] fns!(i128, u128); /// `$dst` can hold any value of `$src` macro_rules! promotion { ($($src:ty => $($dst: ty),+);+;) => { $( $( impl From<$src> for $dst { type Output = $dst; #[inline] fn cast(src: $src) -> $dst { src as $dst } } )+ )+ } } /// `$dst` can hold any positive value of `$src` macro_rules! half_promotion { ($($src:ty => $($dst:ty),+);+;) => { $( $( impl From<$src> for $dst { type Output = Result<$dst, Error>; #[inline] fn cast(src: $src) -> Self::Output { if src < 0 { Err(Error::Underflow) } else { Ok(src as $dst) } } } )+ )+ } } /// From an unsigned `$src` to a smaller `$dst` macro_rules! from_unsigned { ($($src:ident => $($dst:ident),+);+;) => { $( $( impl From<$src> for $dst { type Output = Result<$dst, Error>; #[inline] fn cast(src: $src) -> Self::Output { use core::$dst; if src > $dst::MAX as $src { Err(Error::Overflow) } else { Ok(src as $dst) } } } )+ )+ } } /// From a signed `$src` to a smaller `$dst` macro_rules! from_signed { ($($src:ident => $($dst:ident),+);+;) => { $( $( impl From<$src> for $dst { type Output = Result<$dst, Error>; #[inline] fn cast(src: $src) -> Self::Output { use core::$dst; Err(if src < $dst::MIN as $src { Error::Underflow } else if src > $dst::MAX as $src { Error::Overflow } else { return Ok(src as $dst); }) } } )+ )+ } } /// From a float `$src` to an integer `$dst` macro_rules! from_float { ($($src:ident, $usrc:ident => $($dst:ident),+);+;) => { $( $( impl From<$src> for $dst { type Output = Result<$dst, Error>; #[inline] fn cast(src: $src) -> Self::Output { use core::{$dst, $src}; Err(if src != src { Error::NaN } else if src == $src::INFINITY || src == $src::NEG_INFINITY { Error::Infinite } else if { // we subtract 1 ULP (unit of least precision) here because some // lossy conversions like `u64::MAX as f64` round *up* and we want // to avoid this evaluating to false in that case use core::mem::transmute; let max = unsafe { transmute::<_, $src>(transmute::<_, $usrc>($dst::MAX as $src) - 1) }; src > max } { Error::Overflow } else if $dst::MIN == 0 { // when casting to unsigned integer, negative values close to 0 but // larger than 1.0 should be truncated to 0; this behavior matches // casting from a float to a signed integer if src <= -1.0 { Error::Underflow } else { return Ok(src as $dst); } } else if src < $dst::MIN as $src { Error::Underflow } else { return Ok(src as $dst); }) } } )+ )+ } } /// From a float `$src` to an integer `$dst`, where $dst is large enough to contain /// all values of `$src`. We can't ever overflow here #[cfg(feature = "x128")] macro_rules! from_float_dst { ($($src:ident => $($dst:ident),+);+;) => { $( $( impl From<$src> for $dst { type Output = Result<$dst, Error>; #[inline] #[allow(unused_comparisons)] fn cast(src: $src) -> Self::Output { use core::{$dst, $src}; Err(if src != src { Error::NaN } else if src == $src::INFINITY || src == $src::NEG_INFINITY { Error::Infinite } else if ($dst::MIN == 0) && src <= -1.0 { Error::Underflow } else { return Ok(src as $dst); }) } } )+ )+ } } // PLAY TETRIS! ;-) #[cfg(target_pointer_width = "32")] mod _32 { use {Error, From}; // Signed promotion! { i8 => f32, f64, i8, i16, i32, isize, i64; i16 => f32, f64, i16, i32, isize, i64; i32 => f32, f64, i32, isize, i64; isize => f32, f64, i32, isize, i64; i64 => f32, f64, i64; } half_promotion! { i8 => u8, u16, u32, usize, u64; i16 => u16, u32, usize, u64; i32 => u32, usize, u64; isize => u32, usize, u64; i64 => u64; } from_signed! { i16 => i8, u8; i32 => i8, i16, u8, u16; isize => i8, i16, u8, u16; i64 => i8, i16, i32, isize, u8, u16, u32, usize; } // Unsigned promotion! { u8 => f32, f64, i16, i32, isize, i64, u8, u16, u32, usize, u64; u16 => f32, f64, i32, isize, i64, u16, u32, usize, u64; u32 => f32, f64, i64, u32, usize, u64; usize => f32, f64, i64, u32, usize, u64; u64 => f32, f64, u64; } from_unsigned! { u8 => i8; u16 => i8, i16, u8; u32 => i8, i16, i32, isize, u8, u16; usize => i8, i16, i32, isize, u8, u16; u64 => i8, i16, i32, isize, i64, u8, u16, u32, usize; } // Float promotion! { f32 => f32, f64; f64 => f64; } from_float! { f32, u32 => i8, i16, i32, isize, i64, u8, u16, u32, usize, u64; f64, u64 => i8, i16, i32, isize, i64, u8, u16, u32, usize, u64; } } #[cfg(target_pointer_width = "64")] mod _64 { use {Error, From}; // Signed promotion! { i8 => f32, f64, i8, i16, i32, i64, isize; i16 => f32, f64, i16, i32, i64, isize; i32 => f32, f64, i32, i64, isize; i64 => f32, f64, i64, isize; isize => f32, f64, i64, isize; } half_promotion! { i8 => u8, u16, u32, u64, usize; i16 => u16, u32, u64, usize; i32 => u32, u64, usize; i64 => u64, usize; isize => u64, usize; } from_signed! { i16 => i8, u8; i32 => i8, i16, u8, u16; i64 => i8, i16, i32, u8, u16, u32; isize => i8, i16, i32, u8, u16, u32; } // Unsigned promotion! { u8 => f32, f64, i16, i32, i64, isize, u8, u16, u32, u64, usize; u16 => f32, f64, i32, i64, isize, u16, u32, u64, usize; u32 => f32, f64, i64, isize, u32, u64, usize; u64 => f32, f64, u64, usize; usize => f32, f64, u64, usize; } from_unsigned! { u8 => i8; u16 => i8, i16, u8; u32 => i8, i16, i32, u8, u16; u64 => i8, i16, i32, i64, isize, u8, u16, u32; usize => i8, i16, i32, i64, isize, u8, u16, u32; } // Float promotion! { f32 => f32, f64; f64 => f64; } from_float! { f32, u32 => i8, i16, i32, i64, isize, u8, u16, u32, u64, usize; f64, u64 => i8, i16, i32, i64, isize, u8, u16, u32, u64, usize; } } #[cfg(feature = "x128")] mod _x128 { use {Error, From}; // Signed promotion! { i8 => i128; i16 => i128; i32 => i128; i64 => i128; isize => i128; i128 => f32, f64, i128; } half_promotion! { i8 => u128; i16 => u128; i32 => u128; i64 => u128; isize => u128; i128 => u128; } from_signed! { i128 => i8, i16, i32, i64, isize, u8, u16, u32, u64, usize; } // Unsigned promotion! { u8 => i128, u128; u16 => i128, u128; u32 => i128, u128; u64 => i128, u128; usize => i128, u128; u128 => f64, u128; } from_unsigned! { u128 => f32, i8, i16, i32, i64, i128, isize, u8, u16, u32, u64, usize; } // Float from_float! { f32, u32 => i128; f64, u64 => i128, u128; } from_float_dst! { f32 => u128; } } // The missing piece impl From for f32 { type Output = Result; #[inline] fn cast(src: f64) -> Self::Output { use core::{f32, f64}; if src != src || src == f64::INFINITY || src == f64::NEG_INFINITY { Ok(src as f32) } else if src < f32::MIN as f64 { Err(Error::Underflow) } else if src > f32::MAX as f64 { Err(Error::Overflow) } else { Ok(src as f32) } } } cast-0.2.3/src/test.rs010064400017500001750000000167531356410467400130310ustar0000000000000000// If `src` can be promoted to `$dst`, then it must be Ok to cast `dst` back to // `$src` macro_rules! promote_and_back { ($($src:ident => $($dst:ident),+);+;) => { mod demoting_to { $( mod $src { mod from { use From; $( quickcheck! { fn $dst(src: $src) -> bool { $src::cast($dst::cast(src)).is_ok() } } )+ } } )+ } } } #[cfg(target_pointer_width = "32")] promote_and_back! { i8 => f32, f64, i16, i32, isize, i64 ; i16 => f32, f64, i32, isize, i64 ; i32 => f32, f64, i64 ; isize => f32, f64, i64 ; i64 => f32, f64 ; u8 => f32, f64, i16, i32, isize, i64, u16, u32, usize, u64; u16 => f32, f64, i32, isize, i64, u32, usize, u64; u32 => f32, f64, i64, u64; usize => f32, f64, i64, u64; u64 => f32, f64 ; } #[cfg(target_pointer_width = "64")] promote_and_back! { i8 => f32, f64, i16, i32, i64, isize ; i16 => f32, f64, i32, i64, isize ; i32 => f32, f64, i64, isize ; i64 => f32, f64 ; isize => f32, f64 ; u8 => f32, f64, i16, i32, i64, isize, u16, u32, u64, usize; u16 => f32, f64, i32, i64, isize, u32, u64, usize; u32 => f32, f64, i64, isize, u64, usize; u64 => f32, f64 ; usize => f32, f64 ; } // TODO uncomment this once quickcheck supports Arbitrary for i128/u128 // https://github.com/BurntSushi/quickcheck/issues/162 /*#[cfg(feature = "x128")] promote_and_back! { i8 => i128 ; i16 => i128 ; i32 => i128 ; isize => i128 ; i64 => i128 ; i128 => f32, f64 ; u8 => i128, u128; u16 => i128, u128; u32 => i128, u128; usize => i128, u128; u64 => i128, u128; u128 => f32, f64 ; }*/ // If it's Ok to cast `src` to `$dst`, it must also be Ok to cast `dst` back to // `$src` macro_rules! symmetric_cast_between { ($($src:ident => $($dst:ident),+);+;) => { mod symmetric_cast_between { $( mod $src { mod and { use quickcheck::TestResult; use From; $( quickcheck! { fn $dst(src: $src) -> TestResult { if let Ok(dst) = $dst::cast(src) { TestResult::from_bool( $src::cast(dst).is_ok()) } else { TestResult::discard() } } } )+ } } )+ } } } #[cfg(target_pointer_width = "32")] symmetric_cast_between! { u8 => i8 ; u16 => i8, i16 ; u32 => i8, i16, i32 ; usize => i8, i16, i32 ; u64 => i8, i16, i32, i64, isize; } #[cfg(target_pointer_width = "64")] symmetric_cast_between! { u8 => i8 ; u16 => i8, i16 ; u32 => i8, i16, i32 ; u64 => i8, i16, i32, i64, isize; usize => i8, i16, i32, i64, isize; } // TODO uncomment this once quickcheck supports Arbitrary for i128/u128 // https://github.com/BurntSushi/quickcheck/issues/162 /*#[cfg(feature = "x128")] symmetric_cast_between! { u128 => i8, i16, i32, isize, i64, i128; }*/ macro_rules! from_float { ($($src:ident => $($dst:ident),+);+;) => { $( mod $src { mod inf { mod to { use {Error, From}; $( #[test] fn $dst() { let _0: $src = 0.; let _1: $src = 1.; let inf = _1 / _0; let neg_inf = -_1 / _0; assert_eq!($dst::cast(inf), Err(Error::Infinite)); assert_eq!($dst::cast(neg_inf), Err(Error::Infinite)); } )+ } } mod nan { mod to { use {Error, From}; $( #[test] fn $dst() { let _0: $src = 0.; let nan = _0 / _0; assert_eq!($dst::cast(nan), Err(Error::NaN)); } )+ } } } )+ } } from_float! { f32 => i8, i16, i32, i64, isize, u8, u16, u32, u64, usize; f64 => i8, i16, i32, i64, isize, u8, u16, u32, u64, usize; } // TODO uncomment this once quickcheck supports Arbitrary for i128/u128 // https://github.com/BurntSushi/quickcheck/issues/162 /*#[cfg(feature = "x128")] from_float! { f32 => i128, u128; f64 => i128, u128; }*/ #[test] #[cfg(feature = "x128")] fn test_fl_conversion() { use u128; assert_eq!(u128(42.0f32), Ok(42)); } #[test] fn gh16() { assert_eq!(super::u64(-0.01_f64), Ok(0)); assert_eq!(super::u64(-0.99_f32), Ok(0)); assert_eq!(super::u32(-0.99_f64), Ok(0)); assert_eq!(super::u32(-0.01_f32), Ok(0)); assert_eq!(super::u64(0.01_f64), Ok(0)); assert_eq!(super::u64(0.99_f32), Ok(0)); assert_eq!(super::u32(0.99_f64), Ok(0)); assert_eq!(super::u32(0.01_f32), Ok(0)); } #[test] fn gh15() { assert_eq!(super::u32(32_f32.exp2()), Err(super::Error::Overflow)); assert_eq!(super::u32(32_f64.exp2()), Err(super::Error::Overflow)); assert_eq!(super::u64(64_f32.exp2()), Err(super::Error::Overflow)); assert_eq!(super::u64(64_f64.exp2()), Err(super::Error::Overflow)); assert_eq!(super::u8(8_f32.exp2()), Err(super::Error::Overflow)); assert_eq!(super::u8(8_f64.exp2()), Err(super::Error::Overflow)); assert_eq!(super::u16(16_f32.exp2()), Err(super::Error::Overflow)); assert_eq!(super::u16(16_f64.exp2()), Err(super::Error::Overflow)); } cast-0.2.3/.cargo_vcs_info.json0000644000000001120000000000000120210ustar00{ "git": { "sha1": "74cec5dcf2014ecfe7cb05837b147cbb4f49024e" } }