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https://github.com/rust-lang/rust.git
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953 lines
39 KiB
Rust
953 lines
39 KiB
Rust
use core::fmt::Debug;
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use core::num::{IntErrorKind, ParseIntError, TryFromIntError, can_not_overflow};
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use core::ops::{Add, Div, Mul, Rem, Sub};
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use core::str::FromStr;
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#[macro_use]
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mod int_macros;
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mod i128;
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mod i16;
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mod i32;
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mod i64;
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mod i8;
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#[macro_use]
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mod uint_macros;
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mod u128;
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mod u16;
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mod u32;
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mod u64;
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mod u8;
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mod bignum;
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mod const_from;
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mod dec2flt;
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mod flt2dec;
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mod int_log;
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mod int_sqrt;
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mod midpoint;
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mod ops;
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mod wrapping;
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mod float_iter_sum_identity;
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mod ieee754;
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mod nan;
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/// Adds the attribute to all items in the block.
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macro_rules! cfg_block {
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($(#[$attr:meta]{$($it:item)*})*) => {$($(
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#[$attr]
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$it
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)*)*}
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}
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/// Groups items that assume the pointer width is either 16/32/64, and has to be altered if
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/// support for larger/smaller pointer widths are added in the future.
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macro_rules! assume_usize_width {
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{$($it:item)*} => {#[cfg(not(any(
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target_pointer_width = "16", target_pointer_width = "32", target_pointer_width = "64")))]
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compile_error!("The current tests of try_from on usize/isize assume that \
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the pointer width is either 16, 32, or 64");
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$($it)*
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}
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}
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/// Helper function for testing numeric operations
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pub fn test_num<T>(ten: T, two: T)
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where
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T: PartialEq
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+ Add<Output = T>
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+ Sub<Output = T>
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+ Mul<Output = T>
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+ Div<Output = T>
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+ Rem<Output = T>
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+ Debug
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+ Copy,
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{
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assert_eq!(ten.add(two), ten + two);
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assert_eq!(ten.sub(two), ten - two);
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assert_eq!(ten.mul(two), ten * two);
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assert_eq!(ten.div(two), ten / two);
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assert_eq!(ten.rem(two), ten % two);
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}
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/// Helper function for asserting number parsing returns a specific error
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fn test_parse<T>(num_str: &str, expected: Result<T, IntErrorKind>)
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where
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T: FromStr<Err = ParseIntError>,
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Result<T, IntErrorKind>: PartialEq + Debug,
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{
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assert_eq!(num_str.parse::<T>().map_err(|e| e.kind().clone()), expected)
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}
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#[test]
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fn from_str_issue7588() {
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let u: Option<u8> = u8::from_str_radix("1000", 10).ok();
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assert_eq!(u, None);
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let s: Option<i16> = i16::from_str_radix("80000", 10).ok();
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assert_eq!(s, None);
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}
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#[test]
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fn test_int_from_str_overflow() {
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test_parse::<i8>("127", Ok(127));
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test_parse::<i8>("128", Err(IntErrorKind::PosOverflow));
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test_parse::<i8>("-128", Ok(-128));
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test_parse::<i8>("-129", Err(IntErrorKind::NegOverflow));
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test_parse::<i16>("32767", Ok(32_767));
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test_parse::<i16>("32768", Err(IntErrorKind::PosOverflow));
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test_parse::<i16>("-32768", Ok(-32_768));
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test_parse::<i16>("-32769", Err(IntErrorKind::NegOverflow));
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test_parse::<i32>("2147483647", Ok(2_147_483_647));
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test_parse::<i32>("2147483648", Err(IntErrorKind::PosOverflow));
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test_parse::<i32>("-2147483648", Ok(-2_147_483_648));
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test_parse::<i32>("-2147483649", Err(IntErrorKind::NegOverflow));
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test_parse::<i64>("9223372036854775807", Ok(9_223_372_036_854_775_807));
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test_parse::<i64>("9223372036854775808", Err(IntErrorKind::PosOverflow));
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test_parse::<i64>("-9223372036854775808", Ok(-9_223_372_036_854_775_808));
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test_parse::<i64>("-9223372036854775809", Err(IntErrorKind::NegOverflow));
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}
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#[test]
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fn test_can_not_overflow() {
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fn can_overflow<T>(radix: u32, input: &str) -> bool
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where
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T: std::convert::TryFrom<i8>,
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{
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!can_not_overflow::<T>(radix, T::try_from(-1_i8).is_ok(), input.as_bytes())
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}
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// Positive tests:
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assert!(!can_overflow::<i8>(16, "F"));
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assert!(!can_overflow::<u8>(16, "FF"));
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assert!(!can_overflow::<i8>(10, "9"));
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assert!(!can_overflow::<u8>(10, "99"));
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// Negative tests:
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// Not currently in std lib (issue: #27728)
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fn format_radix<T>(mut x: T, radix: T) -> String
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where
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T: std::ops::Rem<Output = T>,
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T: std::ops::Div<Output = T>,
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T: std::cmp::PartialEq,
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T: std::default::Default,
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T: Copy,
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T: Default,
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u32: TryFrom<T>,
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{
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let mut result = vec![];
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loop {
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let m = x % radix;
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x = x / radix;
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result.push(
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std::char::from_digit(m.try_into().ok().unwrap(), radix.try_into().ok().unwrap())
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.unwrap(),
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);
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if x == T::default() {
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break;
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}
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}
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result.into_iter().rev().collect()
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}
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macro_rules! check {
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($($t:ty)*) => ($(
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for base in 2..=36 {
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let num = (<$t>::MAX as u128) + 1;
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// Calculate the string length for the smallest overflowing number:
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let max_len_string = format_radix(num, base as u128);
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// Ensure that string length is deemed to potentially overflow:
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assert!(can_overflow::<$t>(base, &max_len_string));
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}
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)*)
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}
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check! { i8 i16 i32 i64 i128 isize usize u8 u16 u32 u64 }
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// Check u128 separately:
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for base in 2..=36 {
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let num = <u128>::MAX;
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let max_len_string = format_radix(num, base as u128);
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// base 16 fits perfectly for u128 and won't overflow:
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assert_eq!(can_overflow::<u128>(base, &max_len_string), base != 16);
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}
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}
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#[test]
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fn test_leading_plus() {
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test_parse::<u8>("+127", Ok(127));
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test_parse::<i64>("+9223372036854775807", Ok(9223372036854775807));
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}
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#[test]
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fn test_invalid() {
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test_parse::<i8>("--129", Err(IntErrorKind::InvalidDigit));
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test_parse::<i8>("++129", Err(IntErrorKind::InvalidDigit));
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test_parse::<u8>("Съешь", Err(IntErrorKind::InvalidDigit));
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test_parse::<u8>("123Hello", Err(IntErrorKind::InvalidDigit));
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test_parse::<i8>("--", Err(IntErrorKind::InvalidDigit));
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test_parse::<i8>("-", Err(IntErrorKind::InvalidDigit));
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test_parse::<i8>("+", Err(IntErrorKind::InvalidDigit));
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test_parse::<u8>("-1", Err(IntErrorKind::InvalidDigit));
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}
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#[test]
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fn test_empty() {
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test_parse::<u8>("", Err(IntErrorKind::Empty));
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}
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#[test]
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fn test_infallible_try_from_int_error() {
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let func = |x: i8| -> Result<i32, TryFromIntError> { Ok(x.try_into()?) };
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assert!(func(0).is_ok());
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}
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const _TEST_CONST_PARSE: () = {
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let Ok(-0x8000) = i16::from_str_radix("-8000", 16) else { panic!() };
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let Ok(12345) = u64::from_str_radix("12345", 10) else { panic!() };
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if let Err(e) = i8::from_str_radix("+", 10) {
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let IntErrorKind::InvalidDigit = e.kind() else { panic!() };
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} else {
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panic!()
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}
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};
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macro_rules! test_impl_from {
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($fn_name:ident, bool, $target: ty) => {
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#[test]
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fn $fn_name() {
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let one: $target = 1;
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let zero: $target = 0;
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assert_eq!(one, <$target>::from(true));
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assert_eq!(zero, <$target>::from(false));
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}
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};
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($fn_name: ident, $Small: ty, $Large: ty) => {
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#[test]
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fn $fn_name() {
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let small_max = <$Small>::MAX;
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let small_min = <$Small>::MIN;
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let large_max: $Large = small_max.into();
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let large_min: $Large = small_min.into();
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assert_eq!(large_max as $Small, small_max);
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assert_eq!(large_min as $Small, small_min);
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}
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};
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}
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// Unsigned -> Unsigned
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test_impl_from! { test_u8u16, u8, u16 }
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test_impl_from! { test_u8u32, u8, u32 }
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test_impl_from! { test_u8u64, u8, u64 }
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test_impl_from! { test_u8usize, u8, usize }
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test_impl_from! { test_u16u32, u16, u32 }
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test_impl_from! { test_u16u64, u16, u64 }
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test_impl_from! { test_u32u64, u32, u64 }
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// Signed -> Signed
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test_impl_from! { test_i8i16, i8, i16 }
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test_impl_from! { test_i8i32, i8, i32 }
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test_impl_from! { test_i8i64, i8, i64 }
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test_impl_from! { test_i8isize, i8, isize }
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test_impl_from! { test_i16i32, i16, i32 }
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test_impl_from! { test_i16i64, i16, i64 }
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test_impl_from! { test_i32i64, i32, i64 }
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// Unsigned -> Signed
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test_impl_from! { test_u8i16, u8, i16 }
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test_impl_from! { test_u8i32, u8, i32 }
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test_impl_from! { test_u8i64, u8, i64 }
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test_impl_from! { test_u16i32, u16, i32 }
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test_impl_from! { test_u16i64, u16, i64 }
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test_impl_from! { test_u32i64, u32, i64 }
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// Bool -> Integer
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test_impl_from! { test_boolu8, bool, u8 }
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test_impl_from! { test_boolu16, bool, u16 }
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test_impl_from! { test_boolu32, bool, u32 }
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test_impl_from! { test_boolu64, bool, u64 }
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test_impl_from! { test_boolu128, bool, u128 }
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test_impl_from! { test_booli8, bool, i8 }
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test_impl_from! { test_booli16, bool, i16 }
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test_impl_from! { test_booli32, bool, i32 }
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test_impl_from! { test_booli64, bool, i64 }
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test_impl_from! { test_booli128, bool, i128 }
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// Signed -> Float
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test_impl_from! { test_i8f32, i8, f32 }
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test_impl_from! { test_i8f64, i8, f64 }
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test_impl_from! { test_i16f32, i16, f32 }
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test_impl_from! { test_i16f64, i16, f64 }
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test_impl_from! { test_i32f64, i32, f64 }
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// Unsigned -> Float
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test_impl_from! { test_u8f32, u8, f32 }
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test_impl_from! { test_u8f64, u8, f64 }
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test_impl_from! { test_u16f32, u16, f32 }
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test_impl_from! { test_u16f64, u16, f64 }
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test_impl_from! { test_u32f64, u32, f64 }
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// Float -> Float
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#[test]
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fn test_f32f64() {
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let max: f64 = f32::MAX.into();
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assert_eq!(max as f32, f32::MAX);
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assert!(max.is_normal());
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let min: f64 = f32::MIN.into();
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assert_eq!(min as f32, f32::MIN);
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assert!(min.is_normal());
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let min_positive: f64 = f32::MIN_POSITIVE.into();
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assert_eq!(min_positive as f32, f32::MIN_POSITIVE);
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assert!(min_positive.is_normal());
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let epsilon: f64 = f32::EPSILON.into();
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assert_eq!(epsilon as f32, f32::EPSILON);
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assert!(epsilon.is_normal());
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let zero: f64 = (0.0f32).into();
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assert_eq!(zero as f32, 0.0f32);
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assert!(zero.is_sign_positive());
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let neg_zero: f64 = (-0.0f32).into();
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assert_eq!(neg_zero as f32, -0.0f32);
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assert!(neg_zero.is_sign_negative());
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let infinity: f64 = f32::INFINITY.into();
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assert_eq!(infinity as f32, f32::INFINITY);
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assert!(infinity.is_infinite());
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assert!(infinity.is_sign_positive());
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let neg_infinity: f64 = f32::NEG_INFINITY.into();
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assert_eq!(neg_infinity as f32, f32::NEG_INFINITY);
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assert!(neg_infinity.is_infinite());
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assert!(neg_infinity.is_sign_negative());
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let nan: f64 = f32::NAN.into();
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assert!(nan.is_nan());
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}
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/// Conversions where the full width of $source can be represented as $target
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macro_rules! test_impl_try_from_always_ok {
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($fn_name:ident, $source:ty, $target: ty) => {
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#[test]
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fn $fn_name() {
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let max = <$source>::MAX;
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let min = <$source>::MIN;
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let zero: $source = 0;
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assert_eq!(<$target as TryFrom<$source>>::try_from(max).unwrap(), max as $target);
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assert_eq!(<$target as TryFrom<$source>>::try_from(min).unwrap(), min as $target);
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assert_eq!(<$target as TryFrom<$source>>::try_from(zero).unwrap(), zero as $target);
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}
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};
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}
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test_impl_try_from_always_ok! { test_try_u8u8, u8, u8 }
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test_impl_try_from_always_ok! { test_try_u8u16, u8, u16 }
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test_impl_try_from_always_ok! { test_try_u8u32, u8, u32 }
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test_impl_try_from_always_ok! { test_try_u8u64, u8, u64 }
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test_impl_try_from_always_ok! { test_try_u8u128, u8, u128 }
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test_impl_try_from_always_ok! { test_try_u8i16, u8, i16 }
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test_impl_try_from_always_ok! { test_try_u8i32, u8, i32 }
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test_impl_try_from_always_ok! { test_try_u8i64, u8, i64 }
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test_impl_try_from_always_ok! { test_try_u8i128, u8, i128 }
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test_impl_try_from_always_ok! { test_try_u16u16, u16, u16 }
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test_impl_try_from_always_ok! { test_try_u16u32, u16, u32 }
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test_impl_try_from_always_ok! { test_try_u16u64, u16, u64 }
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test_impl_try_from_always_ok! { test_try_u16u128, u16, u128 }
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test_impl_try_from_always_ok! { test_try_u16i32, u16, i32 }
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test_impl_try_from_always_ok! { test_try_u16i64, u16, i64 }
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test_impl_try_from_always_ok! { test_try_u16i128, u16, i128 }
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test_impl_try_from_always_ok! { test_try_u32u32, u32, u32 }
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test_impl_try_from_always_ok! { test_try_u32u64, u32, u64 }
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test_impl_try_from_always_ok! { test_try_u32u128, u32, u128 }
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test_impl_try_from_always_ok! { test_try_u32i64, u32, i64 }
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test_impl_try_from_always_ok! { test_try_u32i128, u32, i128 }
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test_impl_try_from_always_ok! { test_try_u64u64, u64, u64 }
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test_impl_try_from_always_ok! { test_try_u64u128, u64, u128 }
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test_impl_try_from_always_ok! { test_try_u64i128, u64, i128 }
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test_impl_try_from_always_ok! { test_try_u128u128, u128, u128 }
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test_impl_try_from_always_ok! { test_try_i8i8, i8, i8 }
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test_impl_try_from_always_ok! { test_try_i8i16, i8, i16 }
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test_impl_try_from_always_ok! { test_try_i8i32, i8, i32 }
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test_impl_try_from_always_ok! { test_try_i8i64, i8, i64 }
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test_impl_try_from_always_ok! { test_try_i8i128, i8, i128 }
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test_impl_try_from_always_ok! { test_try_i16i16, i16, i16 }
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test_impl_try_from_always_ok! { test_try_i16i32, i16, i32 }
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test_impl_try_from_always_ok! { test_try_i16i64, i16, i64 }
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test_impl_try_from_always_ok! { test_try_i16i128, i16, i128 }
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test_impl_try_from_always_ok! { test_try_i32i32, i32, i32 }
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test_impl_try_from_always_ok! { test_try_i32i64, i32, i64 }
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test_impl_try_from_always_ok! { test_try_i32i128, i32, i128 }
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test_impl_try_from_always_ok! { test_try_i64i64, i64, i64 }
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test_impl_try_from_always_ok! { test_try_i64i128, i64, i128 }
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test_impl_try_from_always_ok! { test_try_i128i128, i128, i128 }
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test_impl_try_from_always_ok! { test_try_usizeusize, usize, usize }
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test_impl_try_from_always_ok! { test_try_isizeisize, isize, isize }
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assume_usize_width! {
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test_impl_try_from_always_ok! { test_try_u8usize, u8, usize }
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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, $min: expr, $max: expr, $min_pos: expr, $max_exp: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 midpoint() {
|
|
assert_eq!((0.5 as $fty).midpoint(0.5), 0.5);
|
|
assert_eq!((0.5 as $fty).midpoint(2.5), 1.5);
|
|
assert_eq!((3.0 as $fty).midpoint(4.0), 3.5);
|
|
assert_eq!((-3.0 as $fty).midpoint(4.0), 0.5);
|
|
assert_eq!((3.0 as $fty).midpoint(-4.0), -0.5);
|
|
assert_eq!((-3.0 as $fty).midpoint(-4.0), -3.5);
|
|
assert_eq!((0.0 as $fty).midpoint(0.0), 0.0);
|
|
assert_eq!((-0.0 as $fty).midpoint(-0.0), -0.0);
|
|
assert_eq!((-5.0 as $fty).midpoint(5.0), 0.0);
|
|
assert_eq!(($max as $fty).midpoint($min), 0.0);
|
|
assert_eq!(($min as $fty).midpoint($max), -0.0);
|
|
assert_eq!(($max as $fty).midpoint($min_pos), $max / 2.);
|
|
assert_eq!((-$max as $fty).midpoint($min_pos), -$max / 2.);
|
|
assert_eq!(($max as $fty).midpoint(-$min_pos), $max / 2.);
|
|
assert_eq!((-$max as $fty).midpoint(-$min_pos), -$max / 2.);
|
|
assert_eq!(($min_pos as $fty).midpoint($max), $max / 2.);
|
|
assert_eq!(($min_pos as $fty).midpoint(-$max), -$max / 2.);
|
|
assert_eq!((-$min_pos as $fty).midpoint($max), $max / 2.);
|
|
assert_eq!((-$min_pos as $fty).midpoint(-$max), -$max / 2.);
|
|
assert_eq!(($max as $fty).midpoint($max), $max);
|
|
assert_eq!(($min_pos as $fty).midpoint($min_pos), $min_pos);
|
|
assert_eq!((-$min_pos as $fty).midpoint(-$min_pos), -$min_pos);
|
|
assert_eq!(($max as $fty).midpoint(5.0), $max / 2.0 + 2.5);
|
|
assert_eq!(($max as $fty).midpoint(-5.0), $max / 2.0 - 2.5);
|
|
assert_eq!(($inf as $fty).midpoint($inf), $inf);
|
|
assert_eq!(($neginf as $fty).midpoint($neginf), $neginf);
|
|
assert!(($nan as $fty).midpoint(1.0).is_nan());
|
|
assert!((1.0 as $fty).midpoint($nan).is_nan());
|
|
assert!(($nan as $fty).midpoint($nan).is_nan());
|
|
|
|
// test if large differences in magnitude are still correctly computed.
|
|
// NOTE: that because of how small x and y are, x + y can never overflow
|
|
// so (x + y) / 2.0 is always correct
|
|
// in particular, `2.pow(i)` will never be at the max exponent, so it could
|
|
// be safely doubled, while j is significantly smaller.
|
|
for i in $max_exp.saturating_sub(64)..$max_exp {
|
|
for j in 0..64u8 {
|
|
let large = <$fty>::from(2.0f32).powi(i);
|
|
// a much smaller number, such that there is no chance of overflow to test
|
|
// potential double rounding in midpoint's implementation.
|
|
let small = <$fty>::from(2.0f32).powi($max_exp - 1)
|
|
* <$fty>::EPSILON
|
|
* <$fty>::from(j);
|
|
|
|
let naive = (large + small) / 2.0;
|
|
let midpoint = large.midpoint(small);
|
|
|
|
assert_eq!(naive, midpoint);
|
|
}
|
|
}
|
|
}
|
|
#[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,
|
|
f32::MIN,
|
|
f32::MAX,
|
|
f32::MIN_POSITIVE,
|
|
f32::MAX_EXP
|
|
);
|
|
test_float!(
|
|
f64,
|
|
f64,
|
|
f64::INFINITY,
|
|
f64::NEG_INFINITY,
|
|
f64::NAN,
|
|
f64::MIN,
|
|
f64::MAX,
|
|
f64::MIN_POSITIVE,
|
|
f64::MAX_EXP
|
|
);
|