diff options
Diffstat (limited to 'library/core/tests/num/mod.rs')
| -rw-r--r-- | library/core/tests/num/mod.rs | 871 |
1 files changed, 871 insertions, 0 deletions
diff --git a/library/core/tests/num/mod.rs b/library/core/tests/num/mod.rs new file mode 100644 index 000000000..49580cdcc --- /dev/null +++ b/library/core/tests/num/mod.rs @@ -0,0 +1,871 @@ +use core::cmp::PartialEq; +use core::convert::{TryFrom, TryInto}; +use core::fmt::Debug; +use core::marker::Copy; +use core::num::{can_not_overflow, IntErrorKind, ParseIntError, TryFromIntError}; +use core::ops::{Add, Div, Mul, Rem, Sub}; +use core::option::Option; +use core::option::Option::None; +use core::str::FromStr; + +#[macro_use] +mod int_macros; + +mod i128; +mod i16; +mod i32; +mod i64; +mod i8; + +#[macro_use] +mod uint_macros; + +mod u128; +mod u16; +mod u32; +mod u64; +mod u8; + +mod bignum; + +mod const_from; +mod dec2flt; +mod flt2dec; +mod int_log; +mod ops; +mod wrapping; + +mod ieee754; +mod nan; + +/// Adds the attribute to all items in the block. +macro_rules! cfg_block { + ($(#[$attr:meta]{$($it:item)*})*) => {$($( + #[$attr] + $it + )*)*} +} + +/// Groups items that assume the pointer width is either 16/32/64, and has to be altered if +/// support for larger/smaller pointer widths are added in the future. +macro_rules! assume_usize_width { + {$($it:item)*} => {#[cfg(not(any( + target_pointer_width = "16", target_pointer_width = "32", target_pointer_width = "64")))] + compile_error!("The current tests of try_from on usize/isize assume that \ + the pointer width is either 16, 32, or 64"); + $($it)* + } +} + +/// Helper function for testing numeric operations +pub fn test_num<T>(ten: T, two: T) +where + T: PartialEq + + Add<Output = T> + + Sub<Output = T> + + Mul<Output = T> + + Div<Output = T> + + Rem<Output = T> + + Debug + + Copy, +{ + assert_eq!(ten.add(two), ten + two); + assert_eq!(ten.sub(two), ten - two); + assert_eq!(ten.mul(two), ten * two); + assert_eq!(ten.div(two), ten / two); + assert_eq!(ten.rem(two), ten % two); +} + +/// Helper function for asserting number parsing returns a specific error +fn test_parse<T>(num_str: &str, expected: Result<T, IntErrorKind>) +where + T: FromStr<Err = ParseIntError>, + Result<T, IntErrorKind>: PartialEq + Debug, +{ + assert_eq!(num_str.parse::<T>().map_err(|e| e.kind().clone()), expected) +} + +#[test] +fn from_str_issue7588() { + let u: Option<u8> = u8::from_str_radix("1000", 10).ok(); + assert_eq!(u, None); + let s: Option<i16> = i16::from_str_radix("80000", 10).ok(); + assert_eq!(s, None); +} + +#[test] +fn test_int_from_str_overflow() { + test_parse::<i8>("127", Ok(127)); + test_parse::<i8>("128", Err(IntErrorKind::PosOverflow)); + + test_parse::<i8>("-128", Ok(-128)); + test_parse::<i8>("-129", Err(IntErrorKind::NegOverflow)); + + test_parse::<i16>("32767", Ok(32_767)); + test_parse::<i16>("32768", Err(IntErrorKind::PosOverflow)); + + test_parse::<i16>("-32768", Ok(-32_768)); + test_parse::<i16>("-32769", Err(IntErrorKind::NegOverflow)); + + test_parse::<i32>("2147483647", Ok(2_147_483_647)); + test_parse::<i32>("2147483648", Err(IntErrorKind::PosOverflow)); + + test_parse::<i32>("-2147483648", Ok(-2_147_483_648)); + test_parse::<i32>("-2147483649", Err(IntErrorKind::NegOverflow)); + + test_parse::<i64>("9223372036854775807", Ok(9_223_372_036_854_775_807)); + test_parse::<i64>("9223372036854775808", Err(IntErrorKind::PosOverflow)); + + test_parse::<i64>("-9223372036854775808", Ok(-9_223_372_036_854_775_808)); + test_parse::<i64>("-9223372036854775809", Err(IntErrorKind::NegOverflow)); +} + +#[test] +fn test_can_not_overflow() { + fn can_overflow<T>(radix: u32, input: &str) -> bool + where + T: std::convert::TryFrom<i8>, + { + !can_not_overflow::<T>(radix, T::try_from(-1_i8).is_ok(), input.as_bytes()) + } + + // Positive tests: + assert!(!can_overflow::<i8>(16, "F")); + assert!(!can_overflow::<u8>(16, "FF")); + + assert!(!can_overflow::<i8>(10, "9")); + assert!(!can_overflow::<u8>(10, "99")); + + // Negative tests: + + // Not currently in std lib (issue: #27728) + fn format_radix<T>(mut x: T, radix: T) -> String + where + T: std::ops::Rem<Output = T>, + T: std::ops::Div<Output = T>, + T: std::cmp::PartialEq, + T: std::default::Default, + T: Copy, + T: Default, + u32: TryFrom<T>, + { + let mut result = vec![]; + + loop { + let m = x % radix; + x = x / radix; + result.push( + std::char::from_digit(m.try_into().ok().unwrap(), radix.try_into().ok().unwrap()) + .unwrap(), + ); + if x == T::default() { + break; + } + } + result.into_iter().rev().collect() + } + + macro_rules! check { + ($($t:ty)*) => ($( + for base in 2..=36 { + let num = (<$t>::MAX as u128) + 1; + + // Calcutate the string length for the smallest overflowing number: + let max_len_string = format_radix(num, base as u128); + // Ensure that that string length is deemed to potentially overflow: + assert!(can_overflow::<$t>(base, &max_len_string)); + } + )*) + } + + check! { i8 i16 i32 i64 i128 isize usize u8 u16 u32 u64 } + + // Check u128 separately: + for base in 2..=36 { + let num = u128::MAX as u128; + let max_len_string = format_radix(num, base as u128); + // base 16 fits perfectly for u128 and won't overflow: + assert_eq!(can_overflow::<u128>(base, &max_len_string), base != 16); + } +} + +#[test] +fn test_leading_plus() { + test_parse::<u8>("+127", Ok(127)); + test_parse::<i64>("+9223372036854775807", Ok(9223372036854775807)); +} + +#[test] +fn test_invalid() { + test_parse::<i8>("--129", Err(IntErrorKind::InvalidDigit)); + test_parse::<i8>("++129", Err(IntErrorKind::InvalidDigit)); + test_parse::<u8>("Съешь", Err(IntErrorKind::InvalidDigit)); + test_parse::<u8>("123Hello", Err(IntErrorKind::InvalidDigit)); + test_parse::<i8>("--", Err(IntErrorKind::InvalidDigit)); + test_parse::<i8>("-", Err(IntErrorKind::InvalidDigit)); + test_parse::<i8>("+", Err(IntErrorKind::InvalidDigit)); + test_parse::<u8>("-1", Err(IntErrorKind::InvalidDigit)); +} + +#[test] +fn test_empty() { + test_parse::<u8>("", Err(IntErrorKind::Empty)); +} + +#[test] +fn test_infallible_try_from_int_error() { + let func = |x: i8| -> Result<i32, TryFromIntError> { Ok(x.try_into()?) }; + + assert!(func(0).is_ok()); +} + +macro_rules! test_impl_from { + ($fn_name:ident, bool, $target: ty) => { + #[test] + fn $fn_name() { + let one: $target = 1; + let zero: $target = 0; + assert_eq!(one, <$target>::from(true)); + assert_eq!(zero, <$target>::from(false)); + } + }; + ($fn_name: ident, $Small: ty, $Large: ty) => { + #[test] + fn $fn_name() { + let small_max = <$Small>::MAX; + let small_min = <$Small>::MIN; + let large_max: $Large = small_max.into(); + let large_min: $Large = small_min.into(); + assert_eq!(large_max as $Small, small_max); + assert_eq!(large_min as $Small, small_min); + } + }; +} + +// Unsigned -> Unsigned +test_impl_from! { test_u8u16, u8, u16 } +test_impl_from! { test_u8u32, u8, u32 } +test_impl_from! { test_u8u64, u8, u64 } +test_impl_from! { test_u8usize, u8, usize } +test_impl_from! { test_u16u32, u16, u32 } +test_impl_from! { test_u16u64, u16, u64 } +test_impl_from! { test_u32u64, u32, u64 } + +// Signed -> Signed +test_impl_from! { test_i8i16, i8, i16 } +test_impl_from! { test_i8i32, i8, i32 } +test_impl_from! { test_i8i64, i8, i64 } +test_impl_from! { test_i8isize, i8, isize } +test_impl_from! { test_i16i32, i16, i32 } +test_impl_from! { test_i16i64, i16, i64 } +test_impl_from! { test_i32i64, i32, i64 } + +// Unsigned -> Signed +test_impl_from! { test_u8i16, u8, i16 } +test_impl_from! { test_u8i32, u8, i32 } +test_impl_from! { test_u8i64, u8, i64 } +test_impl_from! { test_u16i32, u16, i32 } +test_impl_from! { test_u16i64, u16, i64 } +test_impl_from! { test_u32i64, u32, i64 } + +// Bool -> Integer +test_impl_from! { test_boolu8, bool, u8 } +test_impl_from! { test_boolu16, bool, u16 } +test_impl_from! { test_boolu32, bool, u32 } +test_impl_from! { test_boolu64, bool, u64 } +test_impl_from! { test_boolu128, bool, u128 } +test_impl_from! { test_booli8, bool, i8 } +test_impl_from! { test_booli16, bool, i16 } +test_impl_from! { test_booli32, bool, i32 } +test_impl_from! { test_booli64, bool, i64 } +test_impl_from! { test_booli128, bool, i128 } + +// Signed -> Float +test_impl_from! { test_i8f32, i8, f32 } +test_impl_from! { test_i8f64, i8, f64 } +test_impl_from! { test_i16f32, i16, f32 } +test_impl_from! { test_i16f64, i16, f64 } +test_impl_from! { test_i32f64, i32, f64 } + +// Unsigned -> Float +test_impl_from! { test_u8f32, u8, f32 } +test_impl_from! { test_u8f64, u8, f64 } +test_impl_from! { test_u16f32, u16, f32 } +test_impl_from! { test_u16f64, u16, f64 } +test_impl_from! { test_u32f64, u32, f64 } + +// Float -> Float +#[test] +fn test_f32f64() { + let max: f64 = f32::MAX.into(); + assert_eq!(max as f32, f32::MAX); + assert!(max.is_normal()); + + let min: f64 = f32::MIN.into(); + assert_eq!(min as f32, f32::MIN); + assert!(min.is_normal()); + + let min_positive: f64 = f32::MIN_POSITIVE.into(); + assert_eq!(min_positive as f32, f32::MIN_POSITIVE); + assert!(min_positive.is_normal()); + + let epsilon: f64 = f32::EPSILON.into(); + assert_eq!(epsilon as f32, f32::EPSILON); + assert!(epsilon.is_normal()); + + let zero: f64 = (0.0f32).into(); + assert_eq!(zero as f32, 0.0f32); + assert!(zero.is_sign_positive()); + + let neg_zero: f64 = (-0.0f32).into(); + assert_eq!(neg_zero as f32, -0.0f32); + assert!(neg_zero.is_sign_negative()); + + let infinity: f64 = f32::INFINITY.into(); + assert_eq!(infinity as f32, f32::INFINITY); + assert!(infinity.is_infinite()); + assert!(infinity.is_sign_positive()); + + let neg_infinity: f64 = f32::NEG_INFINITY.into(); + assert_eq!(neg_infinity as f32, f32::NEG_INFINITY); + assert!(neg_infinity.is_infinite()); + assert!(neg_infinity.is_sign_negative()); + + let nan: f64 = f32::NAN.into(); + assert!(nan.is_nan()); +} + +/// Conversions where the full width of $source can be represented as $target +macro_rules! test_impl_try_from_always_ok { + ($fn_name:ident, $source:ty, $target: ty) => { + #[test] + fn $fn_name() { + let max = <$source>::MAX; + let min = <$source>::MIN; + let zero: $source = 0; + assert_eq!(<$target as TryFrom<$source>>::try_from(max).unwrap(), max as $target); + assert_eq!(<$target as TryFrom<$source>>::try_from(min).unwrap(), min as $target); + assert_eq!(<$target as TryFrom<$source>>::try_from(zero).unwrap(), zero as $target); + } + }; +} + +test_impl_try_from_always_ok! { test_try_u8u8, u8, u8 } +test_impl_try_from_always_ok! { test_try_u8u16, u8, u16 } +test_impl_try_from_always_ok! { test_try_u8u32, u8, u32 } +test_impl_try_from_always_ok! { test_try_u8u64, u8, u64 } +test_impl_try_from_always_ok! { test_try_u8u128, u8, u128 } +test_impl_try_from_always_ok! { test_try_u8i16, u8, i16 } +test_impl_try_from_always_ok! { test_try_u8i32, u8, i32 } +test_impl_try_from_always_ok! { test_try_u8i64, u8, i64 } +test_impl_try_from_always_ok! { test_try_u8i128, u8, i128 } + +test_impl_try_from_always_ok! { test_try_u16u16, u16, u16 } +test_impl_try_from_always_ok! { test_try_u16u32, u16, u32 } +test_impl_try_from_always_ok! { test_try_u16u64, u16, u64 } +test_impl_try_from_always_ok! { test_try_u16u128, u16, u128 } +test_impl_try_from_always_ok! { test_try_u16i32, u16, i32 } +test_impl_try_from_always_ok! { test_try_u16i64, u16, i64 } +test_impl_try_from_always_ok! { test_try_u16i128, u16, i128 } + +test_impl_try_from_always_ok! { test_try_u32u32, u32, u32 } +test_impl_try_from_always_ok! { test_try_u32u64, u32, u64 } +test_impl_try_from_always_ok! { test_try_u32u128, u32, u128 } +test_impl_try_from_always_ok! { test_try_u32i64, u32, i64 } +test_impl_try_from_always_ok! { test_try_u32i128, u32, i128 } + +test_impl_try_from_always_ok! { test_try_u64u64, u64, u64 } +test_impl_try_from_always_ok! { test_try_u64u128, u64, u128 } +test_impl_try_from_always_ok! { test_try_u64i128, u64, i128 } + +test_impl_try_from_always_ok! { test_try_u128u128, u128, u128 } + +test_impl_try_from_always_ok! { test_try_i8i8, i8, i8 } +test_impl_try_from_always_ok! { test_try_i8i16, i8, i16 } +test_impl_try_from_always_ok! { test_try_i8i32, i8, i32 } +test_impl_try_from_always_ok! { test_try_i8i64, i8, i64 } +test_impl_try_from_always_ok! { test_try_i8i128, i8, i128 } + +test_impl_try_from_always_ok! { test_try_i16i16, i16, i16 } +test_impl_try_from_always_ok! { test_try_i16i32, i16, i32 } +test_impl_try_from_always_ok! { test_try_i16i64, i16, i64 } +test_impl_try_from_always_ok! { test_try_i16i128, i16, i128 } + +test_impl_try_from_always_ok! { test_try_i32i32, i32, i32 } +test_impl_try_from_always_ok! { test_try_i32i64, i32, i64 } +test_impl_try_from_always_ok! { test_try_i32i128, i32, i128 } + +test_impl_try_from_always_ok! { test_try_i64i64, i64, i64 } +test_impl_try_from_always_ok! { test_try_i64i128, i64, i128 } + +test_impl_try_from_always_ok! { test_try_i128i128, i128, i128 } + +test_impl_try_from_always_ok! { test_try_usizeusize, usize, usize } +test_impl_try_from_always_ok! { test_try_isizeisize, isize, isize } + +assume_usize_width! { + test_impl_try_from_always_ok! { test_try_u8usize, u8, usize } + test_impl_try_from_always_ok! { test_try_u8isize, u8, isize } + test_impl_try_from_always_ok! { test_try_i8isize, i8, isize } + + test_impl_try_from_always_ok! { test_try_u16usize, u16, usize } + test_impl_try_from_always_ok! { test_try_i16isize, i16, isize } + + test_impl_try_from_always_ok! { test_try_usizeu64, usize, u64 } + test_impl_try_from_always_ok! { test_try_usizeu128, usize, u128 } + test_impl_try_from_always_ok! { test_try_usizei128, usize, i128 } + + test_impl_try_from_always_ok! { test_try_isizei64, isize, i64 } + test_impl_try_from_always_ok! { test_try_isizei128, isize, i128 } + + cfg_block!( + #[cfg(target_pointer_width = "16")] { + test_impl_try_from_always_ok! { test_try_usizeu16, usize, u16 } + test_impl_try_from_always_ok! { test_try_isizei16, isize, i16 } + test_impl_try_from_always_ok! { test_try_usizeu32, usize, u32 } + test_impl_try_from_always_ok! { test_try_usizei32, usize, i32 } + test_impl_try_from_always_ok! { test_try_isizei32, isize, i32 } + test_impl_try_from_always_ok! { test_try_usizei64, usize, i64 } + } + + #[cfg(target_pointer_width = "32")] { + test_impl_try_from_always_ok! { test_try_u16isize, u16, isize } + test_impl_try_from_always_ok! { test_try_usizeu32, usize, u32 } + test_impl_try_from_always_ok! { test_try_isizei32, isize, i32 } + test_impl_try_from_always_ok! { test_try_u32usize, u32, usize } + test_impl_try_from_always_ok! { test_try_i32isize, i32, isize } + test_impl_try_from_always_ok! { test_try_usizei64, usize, i64 } + } + + #[cfg(target_pointer_width = "64")] { + test_impl_try_from_always_ok! { test_try_u16isize, u16, isize } + test_impl_try_from_always_ok! { test_try_u32usize, u32, usize } + test_impl_try_from_always_ok! { test_try_u32isize, u32, isize } + test_impl_try_from_always_ok! { test_try_i32isize, i32, isize } + test_impl_try_from_always_ok! { test_try_u64usize, u64, usize } + test_impl_try_from_always_ok! { test_try_i64isize, i64, isize } + } + ); +} + +/// Conversions where max of $source can be represented as $target, +macro_rules! test_impl_try_from_signed_to_unsigned_upper_ok { + ($fn_name:ident, $source:ty, $target:ty) => { + #[test] + fn $fn_name() { + let max = <$source>::MAX; + let min = <$source>::MIN; + let zero: $source = 0; + let neg_one: $source = -1; + assert_eq!(<$target as TryFrom<$source>>::try_from(max).unwrap(), max as $target); + assert!(<$target as TryFrom<$source>>::try_from(min).is_err()); + assert_eq!(<$target as TryFrom<$source>>::try_from(zero).unwrap(), zero as $target); + assert!(<$target as TryFrom<$source>>::try_from(neg_one).is_err()); + } + }; +} + +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i8u8, i8, u8 } +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i8u16, i8, u16 } +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i8u32, i8, u32 } +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i8u64, i8, u64 } +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i8u128, i8, u128 } + +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i16u16, i16, u16 } +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i16u32, i16, u32 } +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i16u64, i16, u64 } +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i16u128, i16, u128 } + +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i32u32, i32, u32 } +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i32u64, i32, u64 } +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i32u128, i32, u128 } + +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i64u64, i64, u64 } +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i64u128, i64, u128 } + +test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i128u128, i128, u128 } + +assume_usize_width! { + test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i8usize, i8, usize } + test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i16usize, i16, usize } + + test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_isizeu64, isize, u64 } + test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_isizeu128, isize, u128 } + test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_isizeusize, isize, usize } + + cfg_block!( + #[cfg(target_pointer_width = "16")] { + test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_isizeu16, isize, u16 } + test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_isizeu32, isize, u32 } + } + + #[cfg(target_pointer_width = "32")] { + test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_isizeu32, isize, u32 } + + test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i32usize, i32, usize } + } + + #[cfg(target_pointer_width = "64")] { + test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i32usize, i32, usize } + test_impl_try_from_signed_to_unsigned_upper_ok! { test_try_i64usize, i64, usize } + } + ); +} + +/// Conversions where max of $source can not be represented as $target, +/// but min can. +macro_rules! test_impl_try_from_unsigned_to_signed_upper_err { + ($fn_name:ident, $source:ty, $target:ty) => { + #[test] + fn $fn_name() { + let max = <$source>::MAX; + let min = <$source>::MIN; + let zero: $source = 0; + assert!(<$target as TryFrom<$source>>::try_from(max).is_err()); + assert_eq!(<$target as TryFrom<$source>>::try_from(min).unwrap(), min as $target); + assert_eq!(<$target as TryFrom<$source>>::try_from(zero).unwrap(), zero as $target); + } + }; +} + +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u8i8, u8, i8 } + +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u16i8, u16, i8 } +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u16i16, u16, i16 } + +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u32i8, u32, i8 } +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u32i16, u32, i16 } +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u32i32, u32, i32 } + +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u64i8, u64, i8 } +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u64i16, u64, i16 } +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u64i32, u64, i32 } +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u64i64, u64, i64 } + +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u128i8, u128, i8 } +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u128i16, u128, i16 } +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u128i32, u128, i32 } +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u128i64, u128, i64 } +test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u128i128, u128, i128 } + +assume_usize_width! { + test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u64isize, u64, isize } + test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u128isize, u128, isize } + + test_impl_try_from_unsigned_to_signed_upper_err! { test_try_usizei8, usize, i8 } + test_impl_try_from_unsigned_to_signed_upper_err! { test_try_usizei16, usize, i16 } + test_impl_try_from_unsigned_to_signed_upper_err! { test_try_usizeisize, usize, isize } + + cfg_block!( + #[cfg(target_pointer_width = "16")] { + test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u16isize, u16, isize } + test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u32isize, u32, isize } + } + + #[cfg(target_pointer_width = "32")] { + test_impl_try_from_unsigned_to_signed_upper_err! { test_try_u32isize, u32, isize } + test_impl_try_from_unsigned_to_signed_upper_err! { test_try_usizei32, usize, i32 } + } + + #[cfg(target_pointer_width = "64")] { + test_impl_try_from_unsigned_to_signed_upper_err! { test_try_usizei32, usize, i32 } + test_impl_try_from_unsigned_to_signed_upper_err! { test_try_usizei64, usize, i64 } + } + ); +} + +/// Conversions where min/max of $source can not be represented as $target. +macro_rules! test_impl_try_from_same_sign_err { + ($fn_name:ident, $source:ty, $target:ty) => { + #[test] + fn $fn_name() { + let max = <$source>::MAX; + let min = <$source>::MIN; + let zero: $source = 0; + let t_max = <$target>::MAX; + let t_min = <$target>::MIN; + assert!(<$target as TryFrom<$source>>::try_from(max).is_err()); + if min != 0 { + assert!(<$target as TryFrom<$source>>::try_from(min).is_err()); + } + assert_eq!(<$target as TryFrom<$source>>::try_from(zero).unwrap(), zero as $target); + assert_eq!( + <$target as TryFrom<$source>>::try_from(t_max as $source).unwrap(), + t_max as $target + ); + assert_eq!( + <$target as TryFrom<$source>>::try_from(t_min as $source).unwrap(), + t_min as $target + ); + } + }; +} + +test_impl_try_from_same_sign_err! { test_try_u16u8, u16, u8 } + +test_impl_try_from_same_sign_err! { test_try_u32u8, u32, u8 } +test_impl_try_from_same_sign_err! { test_try_u32u16, u32, u16 } + +test_impl_try_from_same_sign_err! { test_try_u64u8, u64, u8 } +test_impl_try_from_same_sign_err! { test_try_u64u16, u64, u16 } +test_impl_try_from_same_sign_err! { test_try_u64u32, u64, u32 } + +test_impl_try_from_same_sign_err! { test_try_u128u8, u128, u8 } +test_impl_try_from_same_sign_err! { test_try_u128u16, u128, u16 } +test_impl_try_from_same_sign_err! { test_try_u128u32, u128, u32 } +test_impl_try_from_same_sign_err! { test_try_u128u64, u128, u64 } + +test_impl_try_from_same_sign_err! { test_try_i16i8, i16, i8 } +test_impl_try_from_same_sign_err! { test_try_isizei8, isize, i8 } + +test_impl_try_from_same_sign_err! { test_try_i32i8, i32, i8 } +test_impl_try_from_same_sign_err! { test_try_i32i16, i32, i16 } + +test_impl_try_from_same_sign_err! { test_try_i64i8, i64, i8 } +test_impl_try_from_same_sign_err! { test_try_i64i16, i64, i16 } +test_impl_try_from_same_sign_err! { test_try_i64i32, i64, i32 } + +test_impl_try_from_same_sign_err! { test_try_i128i8, i128, i8 } +test_impl_try_from_same_sign_err! { test_try_i128i16, i128, i16 } +test_impl_try_from_same_sign_err! { test_try_i128i32, i128, i32 } +test_impl_try_from_same_sign_err! { test_try_i128i64, i128, i64 } + +assume_usize_width! { + test_impl_try_from_same_sign_err! { test_try_usizeu8, usize, u8 } + test_impl_try_from_same_sign_err! { test_try_u128usize, u128, usize } + test_impl_try_from_same_sign_err! { test_try_i128isize, i128, isize } + + cfg_block!( + #[cfg(target_pointer_width = "16")] { + test_impl_try_from_same_sign_err! { test_try_u32usize, u32, usize } + test_impl_try_from_same_sign_err! { test_try_u64usize, u64, usize } + + test_impl_try_from_same_sign_err! { test_try_i32isize, i32, isize } + test_impl_try_from_same_sign_err! { test_try_i64isize, i64, isize } + } + + #[cfg(target_pointer_width = "32")] { + test_impl_try_from_same_sign_err! { test_try_u64usize, u64, usize } + test_impl_try_from_same_sign_err! { test_try_usizeu16, usize, u16 } + + test_impl_try_from_same_sign_err! { test_try_i64isize, i64, isize } + test_impl_try_from_same_sign_err! { test_try_isizei16, isize, i16 } + } + + #[cfg(target_pointer_width = "64")] { + test_impl_try_from_same_sign_err! { test_try_usizeu16, usize, u16 } + test_impl_try_from_same_sign_err! { test_try_usizeu32, usize, u32 } + + test_impl_try_from_same_sign_err! { test_try_isizei16, isize, i16 } + test_impl_try_from_same_sign_err! { test_try_isizei32, isize, i32 } + } + ); +} + +/// Conversions where neither the min nor the max of $source can be represented by +/// $target, but max/min of the target can be represented by the source. +macro_rules! test_impl_try_from_signed_to_unsigned_err { + ($fn_name:ident, $source:ty, $target:ty) => { + #[test] + fn $fn_name() { + let max = <$source>::MAX; + let min = <$source>::MIN; + let zero: $source = 0; + let t_max = <$target>::MAX; + let t_min = <$target>::MIN; + assert!(<$target as TryFrom<$source>>::try_from(max).is_err()); + assert!(<$target as TryFrom<$source>>::try_from(min).is_err()); + assert_eq!(<$target as TryFrom<$source>>::try_from(zero).unwrap(), zero as $target); + assert_eq!( + <$target as TryFrom<$source>>::try_from(t_max as $source).unwrap(), + t_max as $target + ); + assert_eq!( + <$target as TryFrom<$source>>::try_from(t_min as $source).unwrap(), + t_min as $target + ); + } + }; +} + +test_impl_try_from_signed_to_unsigned_err! { test_try_i16u8, i16, u8 } + +test_impl_try_from_signed_to_unsigned_err! { test_try_i32u8, i32, u8 } +test_impl_try_from_signed_to_unsigned_err! { test_try_i32u16, i32, u16 } + +test_impl_try_from_signed_to_unsigned_err! { test_try_i64u8, i64, u8 } +test_impl_try_from_signed_to_unsigned_err! { test_try_i64u16, i64, u16 } +test_impl_try_from_signed_to_unsigned_err! { test_try_i64u32, i64, u32 } + +test_impl_try_from_signed_to_unsigned_err! { test_try_i128u8, i128, u8 } +test_impl_try_from_signed_to_unsigned_err! { test_try_i128u16, i128, u16 } +test_impl_try_from_signed_to_unsigned_err! { test_try_i128u32, i128, u32 } +test_impl_try_from_signed_to_unsigned_err! { test_try_i128u64, i128, u64 } + +assume_usize_width! { + test_impl_try_from_signed_to_unsigned_err! { test_try_isizeu8, isize, u8 } + test_impl_try_from_signed_to_unsigned_err! { test_try_i128usize, i128, usize } + + cfg_block! { + #[cfg(target_pointer_width = "16")] { + test_impl_try_from_signed_to_unsigned_err! { test_try_i32usize, i32, usize } + test_impl_try_from_signed_to_unsigned_err! { test_try_i64usize, i64, usize } + } + #[cfg(target_pointer_width = "32")] { + test_impl_try_from_signed_to_unsigned_err! { test_try_i64usize, i64, usize } + + test_impl_try_from_signed_to_unsigned_err! { test_try_isizeu16, isize, u16 } + } + #[cfg(target_pointer_width = "64")] { + test_impl_try_from_signed_to_unsigned_err! { test_try_isizeu16, isize, u16 } + test_impl_try_from_signed_to_unsigned_err! { test_try_isizeu32, isize, u32 } + } + } +} + +macro_rules! test_float { + ($modname: ident, $fty: ty, $inf: expr, $neginf: expr, $nan: expr) => { + mod $modname { + #[test] + fn min() { + assert_eq!((0.0 as $fty).min(0.0), 0.0); + assert!((0.0 as $fty).min(0.0).is_sign_positive()); + assert_eq!((-0.0 as $fty).min(-0.0), -0.0); + assert!((-0.0 as $fty).min(-0.0).is_sign_negative()); + assert_eq!((9.0 as $fty).min(9.0), 9.0); + assert_eq!((-9.0 as $fty).min(0.0), -9.0); + assert_eq!((0.0 as $fty).min(9.0), 0.0); + assert!((0.0 as $fty).min(9.0).is_sign_positive()); + assert_eq!((-0.0 as $fty).min(9.0), -0.0); + assert!((-0.0 as $fty).min(9.0).is_sign_negative()); + assert_eq!((-0.0 as $fty).min(-9.0), -9.0); + assert_eq!(($inf as $fty).min(9.0), 9.0); + assert_eq!((9.0 as $fty).min($inf), 9.0); + assert_eq!(($inf as $fty).min(-9.0), -9.0); + assert_eq!((-9.0 as $fty).min($inf), -9.0); + assert_eq!(($neginf as $fty).min(9.0), $neginf); + assert_eq!((9.0 as $fty).min($neginf), $neginf); + assert_eq!(($neginf as $fty).min(-9.0), $neginf); + assert_eq!((-9.0 as $fty).min($neginf), $neginf); + assert_eq!(($nan as $fty).min(9.0), 9.0); + assert_eq!(($nan as $fty).min(-9.0), -9.0); + assert_eq!((9.0 as $fty).min($nan), 9.0); + assert_eq!((-9.0 as $fty).min($nan), -9.0); + assert!(($nan as $fty).min($nan).is_nan()); + } + #[test] + fn max() { + assert_eq!((0.0 as $fty).max(0.0), 0.0); + assert!((0.0 as $fty).max(0.0).is_sign_positive()); + assert_eq!((-0.0 as $fty).max(-0.0), -0.0); + assert!((-0.0 as $fty).max(-0.0).is_sign_negative()); + assert_eq!((9.0 as $fty).max(9.0), 9.0); + assert_eq!((-9.0 as $fty).max(0.0), 0.0); + assert!((-9.0 as $fty).max(0.0).is_sign_positive()); + assert_eq!((-9.0 as $fty).max(-0.0), -0.0); + assert!((-9.0 as $fty).max(-0.0).is_sign_negative()); + assert_eq!((0.0 as $fty).max(9.0), 9.0); + assert_eq!((0.0 as $fty).max(-9.0), 0.0); + assert!((0.0 as $fty).max(-9.0).is_sign_positive()); + assert_eq!((-0.0 as $fty).max(-9.0), -0.0); + assert!((-0.0 as $fty).max(-9.0).is_sign_negative()); + assert_eq!(($inf as $fty).max(9.0), $inf); + assert_eq!((9.0 as $fty).max($inf), $inf); + assert_eq!(($inf as $fty).max(-9.0), $inf); + assert_eq!((-9.0 as $fty).max($inf), $inf); + assert_eq!(($neginf as $fty).max(9.0), 9.0); + assert_eq!((9.0 as $fty).max($neginf), 9.0); + assert_eq!(($neginf as $fty).max(-9.0), -9.0); + assert_eq!((-9.0 as $fty).max($neginf), -9.0); + assert_eq!(($nan as $fty).max(9.0), 9.0); + assert_eq!(($nan as $fty).max(-9.0), -9.0); + assert_eq!((9.0 as $fty).max($nan), 9.0); + assert_eq!((-9.0 as $fty).max($nan), -9.0); + assert!(($nan as $fty).max($nan).is_nan()); + } + #[test] + fn minimum() { + assert_eq!((0.0 as $fty).minimum(0.0), 0.0); + assert!((0.0 as $fty).minimum(0.0).is_sign_positive()); + assert_eq!((-0.0 as $fty).minimum(0.0), -0.0); + assert!((-0.0 as $fty).minimum(0.0).is_sign_negative()); + assert_eq!((-0.0 as $fty).minimum(-0.0), -0.0); + assert!((-0.0 as $fty).minimum(-0.0).is_sign_negative()); + assert_eq!((9.0 as $fty).minimum(9.0), 9.0); + assert_eq!((-9.0 as $fty).minimum(0.0), -9.0); + assert_eq!((0.0 as $fty).minimum(9.0), 0.0); + assert!((0.0 as $fty).minimum(9.0).is_sign_positive()); + assert_eq!((-0.0 as $fty).minimum(9.0), -0.0); + assert!((-0.0 as $fty).minimum(9.0).is_sign_negative()); + assert_eq!((-0.0 as $fty).minimum(-9.0), -9.0); + assert_eq!(($inf as $fty).minimum(9.0), 9.0); + assert_eq!((9.0 as $fty).minimum($inf), 9.0); + assert_eq!(($inf as $fty).minimum(-9.0), -9.0); + assert_eq!((-9.0 as $fty).minimum($inf), -9.0); + assert_eq!(($neginf as $fty).minimum(9.0), $neginf); + assert_eq!((9.0 as $fty).minimum($neginf), $neginf); + assert_eq!(($neginf as $fty).minimum(-9.0), $neginf); + assert_eq!((-9.0 as $fty).minimum($neginf), $neginf); + assert!(($nan as $fty).minimum(9.0).is_nan()); + assert!(($nan as $fty).minimum(-9.0).is_nan()); + assert!((9.0 as $fty).minimum($nan).is_nan()); + assert!((-9.0 as $fty).minimum($nan).is_nan()); + assert!(($nan as $fty).minimum($nan).is_nan()); + } + #[test] + fn maximum() { + assert_eq!((0.0 as $fty).maximum(0.0), 0.0); + assert!((0.0 as $fty).maximum(0.0).is_sign_positive()); + assert_eq!((-0.0 as $fty).maximum(0.0), 0.0); + assert!((-0.0 as $fty).maximum(0.0).is_sign_positive()); + assert_eq!((-0.0 as $fty).maximum(-0.0), -0.0); + assert!((-0.0 as $fty).maximum(-0.0).is_sign_negative()); + assert_eq!((9.0 as $fty).maximum(9.0), 9.0); + assert_eq!((-9.0 as $fty).maximum(0.0), 0.0); + assert!((-9.0 as $fty).maximum(0.0).is_sign_positive()); + assert_eq!((-9.0 as $fty).maximum(-0.0), -0.0); + assert!((-9.0 as $fty).maximum(-0.0).is_sign_negative()); + assert_eq!((0.0 as $fty).maximum(9.0), 9.0); + assert_eq!((0.0 as $fty).maximum(-9.0), 0.0); + assert!((0.0 as $fty).maximum(-9.0).is_sign_positive()); + assert_eq!((-0.0 as $fty).maximum(-9.0), -0.0); + assert!((-0.0 as $fty).maximum(-9.0).is_sign_negative()); + assert_eq!(($inf as $fty).maximum(9.0), $inf); + assert_eq!((9.0 as $fty).maximum($inf), $inf); + assert_eq!(($inf as $fty).maximum(-9.0), $inf); + assert_eq!((-9.0 as $fty).maximum($inf), $inf); + assert_eq!(($neginf as $fty).maximum(9.0), 9.0); + assert_eq!((9.0 as $fty).maximum($neginf), 9.0); + assert_eq!(($neginf as $fty).maximum(-9.0), -9.0); + assert_eq!((-9.0 as $fty).maximum($neginf), -9.0); + assert!(($nan as $fty).maximum(9.0).is_nan()); + assert!(($nan as $fty).maximum(-9.0).is_nan()); + assert!((9.0 as $fty).maximum($nan).is_nan()); + assert!((-9.0 as $fty).maximum($nan).is_nan()); + assert!(($nan as $fty).maximum($nan).is_nan()); + } + #[test] + fn rem_euclid() { + let a: $fty = 42.0; + assert!($inf.rem_euclid(a).is_nan()); + assert_eq!(a.rem_euclid($inf), a); + assert!(a.rem_euclid($nan).is_nan()); + assert!($inf.rem_euclid($inf).is_nan()); + assert!($inf.rem_euclid($nan).is_nan()); + assert!($nan.rem_euclid($inf).is_nan()); + } + #[test] + fn div_euclid() { + let a: $fty = 42.0; + assert_eq!(a.div_euclid($inf), 0.0); + assert!(a.div_euclid($nan).is_nan()); + assert!($inf.div_euclid($inf).is_nan()); + assert!($inf.div_euclid($nan).is_nan()); + assert!($nan.div_euclid($inf).is_nan()); + } + } + }; +} + +test_float!(f32, f32, f32::INFINITY, f32::NEG_INFINITY, f32::NAN); +test_float!(f64, f64, f64::INFINITY, f64::NEG_INFINITY, f64::NAN); |