src/tools/clippy/tests/ui/cast.rs - third_party/rust - Git at Google

 //@no-rustfix

 #![feature(repr128)]
 #![allow(incomplete_features)]
 #![warn(
     clippy::cast_precision_loss,
     clippy::cast_possible_truncation,
     clippy::cast_sign_loss,
     clippy::cast_possible_wrap
 )]
 #![allow(
     clippy::cast_abs_to_unsigned,
     clippy::no_effect,
     clippy::unnecessary_min_or_max,
     clippy::unnecessary_operation,
     clippy::unnecessary_literal_unwrap,
     clippy::identity_op
 )]

 // FIXME(f16_f128): add tests once const casting is available for these types

 fn main() {
     // Test clippy::cast_precision_loss
     let x0 = 1i32;
     x0 as f32;
     //~^ ERROR: casting `i32` to `f32` causes a loss of precision (`i32` is 32 bits wide,
     //~| NOTE: `-D clippy::cast-precision-loss` implied by `-D warnings`
     let x1 = 1i64;
     x1 as f32;
     //~^ ERROR: casting `i64` to `f32` causes a loss of precision (`i64` is 64 bits wide,
     x1 as f64;
     //~^ ERROR: casting `i64` to `f64` causes a loss of precision (`i64` is 64 bits wide,
     let x2 = 1u32;
     x2 as f32;
     //~^ ERROR: casting `u32` to `f32` causes a loss of precision (`u32` is 32 bits wide,
     let x3 = 1u64;
     x3 as f32;
     //~^ ERROR: casting `u64` to `f32` causes a loss of precision (`u64` is 64 bits wide,
     x3 as f64;
     //~^ ERROR: casting `u64` to `f64` causes a loss of precision (`u64` is 64 bits wide,
     // Test clippy::cast_possible_truncation
     1f32 as i32;
     //~^ ERROR: casting `f32` to `i32` may truncate the value
     1f32 as u32;
     //~^ ERROR: casting `f32` to `u32` may truncate the value
     //~| ERROR: casting `f32` to `u32` may lose the sign of the value
     //~| NOTE: `-D clippy::cast-sign-loss` implied by `-D warnings`
     1f64 as f32;
     //~^ ERROR: casting `f64` to `f32` may truncate the value
     1i32 as i8;
     //~^ ERROR: casting `i32` to `i8` may truncate the value
     1i32 as u8;
     //~^ ERROR: casting `i32` to `u8` may truncate the value
     1f64 as isize;
     //~^ ERROR: casting `f64` to `isize` may truncate the value
     1f64 as usize;
     //~^ ERROR: casting `f64` to `usize` may truncate the value
     //~| ERROR: casting `f64` to `usize` may lose the sign of the value
     1f32 as u32 as u16;
     //~^ ERROR: casting `u32` to `u16` may truncate the value
     //~| ERROR: casting `f32` to `u32` may truncate the value
     //~| ERROR: casting `f32` to `u32` may lose the sign of the value
     {
         let _x: i8 = 1i32 as _;
         //~^ ERROR: casting `i32` to `i8` may truncate the value
         1f32 as i32;
         //~^ ERROR: casting `f32` to `i32` may truncate the value
         1f64 as i32;
         //~^ ERROR: casting `f64` to `i32` may truncate the value
         1f32 as u8;
         //~^ ERROR: casting `f32` to `u8` may truncate the value
         //~| ERROR: casting `f32` to `u8` may lose the sign of the value
     }
     // Test clippy::cast_possible_wrap
     1u8 as i8;
     //~^ ERROR: casting `u8` to `i8` may wrap around the value
     //~| NOTE: `-D clippy::cast-possible-wrap` implied by `-D warnings`
     1u16 as i16;
     //~^ ERROR: casting `u16` to `i16` may wrap around the value
     1u32 as i32;
     //~^ ERROR: casting `u32` to `i32` may wrap around the value
     1u64 as i64;
     //~^ ERROR: casting `u64` to `i64` may wrap around the value
     1usize as isize;
     //~^ ERROR: casting `usize` to `isize` may wrap around the value
     // should not wrap, usize is never 8 bits
     1usize as i8;
     //~^ ERROR: casting `usize` to `i8` may truncate the value
     // wraps on 16 bit ptr size
     1usize as i16;
     //~^ ERROR: casting `usize` to `i16` may truncate the value
     //~| ERROR: casting `usize` to `i16` may wrap around the value on targets with 16-bit
     //~| NOTE: `usize` and `isize` may be as small as 16 bits on some platforms
     // wraps on 32 bit ptr size
     1usize as i32;
     //~^ ERROR: casting `usize` to `i32` may truncate the value on targets with 64-bit wid
     //~| ERROR: casting `usize` to `i32` may wrap around the value on targets with 32-bit
     // wraps on 64 bit ptr size
     1usize as i64;
     //~^ ERROR: casting `usize` to `i64` may wrap around the value on targets with 64-bit
     // should not wrap, isize is never 8 bits
     1u8 as isize;
     // wraps on 16 bit ptr size
     1u16 as isize;
     //~^ ERROR: casting `u16` to `isize` may wrap around the value on targets with 16-bit
     //~| NOTE: `usize` and `isize` may be as small as 16 bits on some platforms
     // wraps on 32 bit ptr size
     1u32 as isize;
     //~^ ERROR: casting `u32` to `isize` may wrap around the value on targets with 32-bit
     // wraps on 64 bit ptr size
     1u64 as isize;
     //~^ ERROR: casting `u64` to `isize` may truncate the value on targets with 32-bit wid
     //~| ERROR: casting `u64` to `isize` may wrap around the value on targets with 64-bit
     // Test clippy::cast_sign_loss
     1i32 as u32;
     -1i32 as u32;
     //~^ ERROR: casting `i32` to `u32` may lose the sign of the value
     1isize as usize;
     -1isize as usize;
     //~^ ERROR: casting `isize` to `usize` may lose the sign of the value
     0i8 as u8;
     i8::MAX as u8;
     i16::MAX as u16;
     i32::MAX as u32;
     i64::MAX as u64;
     i128::MAX as u128;

     (-1i8).saturating_abs() as u8;
     // abs() can return a negative value in release builds
     (i8::MIN).abs() as u8;
     //~^ ERROR: casting `i8` to `u8` may lose the sign of the value
     (-1i16).saturating_abs() as u16;
     (-1i32).saturating_abs() as u32;
     (-1i64).abs() as u64;
     (-1isize).abs() as usize;

     (-1i8).checked_abs().unwrap() as u8;
     (i8::MIN).checked_abs().unwrap() as u8;
     (-1i16).checked_abs().unwrap() as u16;
     (-1i32).checked_abs().unwrap() as u32;
     // SAFETY: -1 is a small number which will always return Some
     (unsafe { (-1i64).checked_abs().unwrap_unchecked() }) as u64;
     (-1isize).checked_abs().expect("-1 is a small number") as usize;

     (-1i8).isqrt() as u8;
     (i8::MIN).isqrt() as u8;
     (-1i16).isqrt() as u16;
     (-1i32).isqrt() as u32;
     (-1i64).isqrt() as u64;
     (-1isize).isqrt() as usize;

     (-1i8).checked_isqrt().unwrap() as u8;
     (i8::MIN).checked_isqrt().unwrap() as u8;
     (-1i16).checked_isqrt().unwrap() as u16;
     (-1i32).checked_isqrt().unwrap() as u32;
     // SAFETY: -1 is a small number which will always return Some
     (unsafe { (-1i64).checked_isqrt().unwrap_unchecked() }) as u64;
     (-1isize).checked_isqrt().expect("-1 is a small number") as usize;

     (-1i8).rem_euclid(1i8) as u8;
     (-1i8).wrapping_rem_euclid(1i8) as u16;
     (-1i16).rem_euclid(1i16) as u16;
     (-1i16).rem_euclid(1i16) as u32;
     (-1i32).rem_euclid(1i32) as u32;
     (-1i32).rem_euclid(1i32) as u64;
     (-1i64).rem_euclid(1i64) as u64;
     (-1i64).rem_euclid(1i64) as u128;
     (-1isize).rem_euclid(1isize) as usize;
     (1i8).rem_euclid(-1i8) as u8;
     (1i8).wrapping_rem_euclid(-1i8) as u16;
     (1i16).rem_euclid(-1i16) as u16;
     (1i16).rem_euclid(-1i16) as u32;
     (1i32).rem_euclid(-1i32) as u32;
     (1i32).rem_euclid(-1i32) as u64;
     (1i64).rem_euclid(-1i64) as u64;
     (1i64).rem_euclid(-1i64) as u128;
     (1isize).rem_euclid(-1isize) as usize;

     (-1i8).checked_rem_euclid(1i8).unwrap() as u8;
     (-1i8).checked_rem_euclid(1i8).unwrap() as u16;
     (-1i16).checked_rem_euclid(1i16).unwrap() as u16;
     (-1i16).checked_rem_euclid(1i16).unwrap() as u32;
     (-1i32).checked_rem_euclid(1i32).unwrap() as u32;
     (-1i32).checked_rem_euclid(1i32).unwrap() as u64;
     (-1i64).checked_rem_euclid(1i64).unwrap() as u64;
     (-1i64).checked_rem_euclid(1i64).unwrap() as u128;
     (-1isize).checked_rem_euclid(1isize).unwrap() as usize;
     (1i8).checked_rem_euclid(-1i8).unwrap() as u8;
     (1i8).checked_rem_euclid(-1i8).unwrap() as u16;
     (1i16).checked_rem_euclid(-1i16).unwrap() as u16;
     (1i16).checked_rem_euclid(-1i16).unwrap() as u32;
     (1i32).checked_rem_euclid(-1i32).unwrap() as u32;
     (1i32).checked_rem_euclid(-1i32).unwrap() as u64;
     (1i64).checked_rem_euclid(-1i64).unwrap() as u64;
     (1i64).checked_rem_euclid(-1i64).unwrap() as u128;
     (1isize).checked_rem_euclid(-1isize).unwrap() as usize;

     // no lint for `cast_possible_truncation`
     // with `signum` method call (see issue #5395)
     let x: i64 = 5;
     let _ = x.signum() as i32;

     let s = x.signum();
     let _ = s as i32;

     // Test for signed min
     // should be linted because signed
     (-99999999999i64).min(1) as i8;
     //~^ ERROR: casting `i64` to `i8` may truncate the value

     // Test for various operations that remove enough bits for the result to fit
     (999999u64 & 1) as u8;
     (999999u64 % 15) as u8;
     (999999u64 / 0x1_0000_0000_0000) as u16;
     ({ 999999u64 >> 56 }) as u8;
     ({
         let x = 999999u64;
         x.min(1)
     }) as u8;
     999999u64.clamp(0, 255) as u8;
     // should still be linted
     999999u64.clamp(0, 256) as u8;
     //~^ ERROR: casting `u64` to `u8` may truncate the value

     #[derive(Clone, Copy)]
     enum E1 {
         A,
         B,
         C,
     }
     impl E1 {
         fn test(self) {
             // Don't lint. `0..=2` fits in u8
             let _ = self as u8;
         }
     }

     #[derive(Clone, Copy)]
     enum E2 {
         A = 255,
         B,
     }
     impl E2 {
         fn test(self) {
             let _ = self as u8;
             //~^ ERROR: casting `main::E2` to `u8` may truncate the value
             let _ = Self::B as u8;
             //~^ ERROR: casting `main::E2::B` to `u8` will truncate the value
             //~| NOTE: `-D clippy::cast-enum-truncation` implied by `-D warnings`
             // Don't lint. `255..=256` fits in i16
             let _ = self as i16;
             // Don't lint.
             let _ = Self::A as u8;
         }
     }

     #[derive(Clone, Copy)]
     enum E3 {
         A = -1,
         B,
         C = 50,
     }
     impl E3 {
         fn test(self) {
             // Don't lint. `-1..=50` fits in i8
             let _ = self as i8;
         }
     }

     #[derive(Clone, Copy)]
     enum E4 {
         A = -128,
         B,
     }
     impl E4 {
         fn test(self) {
             // Don't lint. `-128..=-127` fits in i8
             let _ = self as i8;
         }
     }

     #[derive(Clone, Copy)]
     enum E5 {
         A = -129,
         B = 127,
     }
     impl E5 {
         fn test(self) {
             let _ = self as i8;
             //~^ ERROR: casting `main::E5` to `i8` may truncate the value
             let _ = Self::A as i8;
             //~^ ERROR: casting `main::E5::A` to `i8` will truncate the value
             // Don't lint. `-129..=127` fits in i16
             let _ = self as i16;
             // Don't lint.
             let _ = Self::B as u8;
         }
     }

     #[derive(Clone, Copy)]
     #[repr(u32)]
     enum E6 {
         A = u16::MAX as u32,
         B,
     }
     impl E6 {
         fn test(self) {
             let _ = self as i16;
             //~^ ERROR: casting `main::E6` to `i16` may truncate the value
             // Don't lint. `2^16-1` fits in u16
             let _ = Self::A as u16;
             // Don't lint. `2^16-1..=2^16` fits in u32
             let _ = self as u32;
             // Don't lint.
             let _ = Self::A as u16;
         }
     }

     #[derive(Clone, Copy)]
     #[repr(u64)]
     enum E7 {
         A = u32::MAX as u64,
         B,
     }
     impl E7 {
         fn test(self) {
             let _ = self as usize;
             //~^ ERROR: casting `main::E7` to `usize` may truncate the value on targets wi
             // Don't lint.
             let _ = Self::A as usize;
             // Don't lint. `2^32-1..=2^32` fits in u64
             let _ = self as u64;
         }
     }

     #[derive(Clone, Copy)]
     #[repr(i128)]
     enum E8 {
         A = i128::MIN,
         B,
         C = 0,
         D = i128::MAX,
     }
     impl E8 {
         fn test(self) {
             // Don't lint. `-(2^127)..=2^127-1` fits it i128
             let _ = self as i128;
         }
     }

     #[derive(Clone, Copy)]
     #[repr(u128)]
     enum E9 {
         A,
         B = u128::MAX,
     }
     impl E9 {
         fn test(self) {
             // Don't lint.
             let _ = Self::A as u8;
             // Don't lint. `0..=2^128-1` fits in u128
             let _ = self as u128;
         }
     }

     #[derive(Clone, Copy)]
     #[repr(usize)]
     enum E10 {
         A,
         B = u32::MAX as usize,
     }
     impl E10 {
         fn test(self) {
             let _ = self as u16;
             //~^ ERROR: casting `main::E10` to `u16` may truncate the value
             // Don't lint.
             let _ = Self::B as u32;
             // Don't lint.
             let _ = self as u64;
         }
     }
 }

 fn avoid_subtract_overflow(q: u32) {
     let c = (q >> 16) as u8;
     //~^ ERROR: casting `u32` to `u8` may truncate the value
     c as usize;

     let c = (q / 1000) as u8;
     //~^ ERROR: casting `u32` to `u8` may truncate the value
     c as usize;
 }

 fn issue11426() {
     (&42u8 >> 0xa9008fb6c9d81e42_0e25730562a601c8_u128) as usize;
 }

 fn issue11642() {
     fn square(x: i16) -> u32 {
         let x = x as i32;
         (x * x) as u32;
         x.pow(2) as u32;
         (-2_i32).saturating_pow(2) as u32
     }

     let _a = |x: i32| -> u32 { (x * x * x * x) as u32 };

     (2_i32).checked_pow(3).unwrap() as u32;
     (-2_i32).pow(3) as u32;
     //~^ ERROR: casting `i32` to `u32` may lose the sign of the value

     (3_i32 % 2) as u32;
     (3_i32 % -2) as u32;
     (-5_i32 % 2) as u32;
     //~^ ERROR: casting `i32` to `u32` may lose the sign of the value
     (-5_i32 % -2) as u32;
     //~^ ERROR: casting `i32` to `u32` may lose the sign of the value
     (2_i32 >> 1) as u32;
     (-2_i32 >> 1) as u32;
     //~^ ERROR: casting `i32` to `u32` may lose the sign of the value

     let x: i32 = 10;
     (x * x) as u32;
     (x * x * x) as u32;
     //~^ ERROR: casting `i32` to `u32` may lose the sign of the value

     let y: i16 = -2;
     (y * y * y * y * -2) as u16;
     //~^ ERROR: casting `i16` to `u16` may lose the sign of the value
     (y * y * y / y * 2) as u16;
     (y * y / y * 2) as u16;
     //~^ ERROR: casting `i16` to `u16` may lose the sign of the value
     (y / y * y * -2) as u16;
     //~^ ERROR: casting `i16` to `u16` may lose the sign of the value

     (y + y + y + -2) as u16;
     //~^ ERROR: casting `i16` to `u16` may lose the sign of the value
     (y + y + y + 2) as u16;
     //~^ ERROR: casting `i16` to `u16` may lose the sign of the value

     let z: i16 = 2;
     (z + -2) as u16;
     //~^ ERROR: casting `i16` to `u16` may lose the sign of the value
     (z + z + 2) as u16;

     fn foo(a: i32, b: i32, c: i32) -> u32 {
         (a * a * b * b * c * c) as u32;
         (a * b * c) as u32;
         //~^ ERROR: casting `i32` to `u32` may lose the sign of the value
         (a * -b * c) as u32;
         //~^ ERROR: casting `i32` to `u32` may lose the sign of the value
         (a * b * c * c) as u32;
         (a * -2) as u32;
         //~^ ERROR: casting `i32` to `u32` may lose the sign of the value
         (a * b * c * -2) as u32;
         //~^ ERROR: casting `i32` to `u32` may lose the sign of the value
         (a / b) as u32;
         (a / b * c) as u32;
         //~^ ERROR: casting `i32` to `u32` may lose the sign of the value
         (a / b + b * c) as u32;
         //~^ ERROR: casting `i32` to `u32` may lose the sign of the value
         a.saturating_pow(3) as u32;
         //~^ ERROR: casting `i32` to `u32` may lose the sign of the value
         (a.abs() * b.pow(2) / c.abs()) as u32
         //~^ ERROR: casting `i32` to `u32` may lose the sign of the value
     }
 }

 fn issue11738() {
     macro_rules! m {
         () => {
             let _ = i32::MIN as u32; // cast_sign_loss
             let _ = u32::MAX as u8; // cast_possible_truncation
             let _ = std::f64::consts::PI as f32; // cast_possible_truncation
             let _ = 0i8 as i32; // cast_lossless
         };
     }
     m!();
 }

 fn issue12506() -> usize {
     let bar: Result<Option<i64>, u32> = Ok(Some(10));
     bar.unwrap().unwrap() as usize
 }

 fn issue12721() {
     fn x() -> u64 {
         u64::MAX
     }

     // Don't lint.
     (255 & 999999u64) as u8;
     // Don't lint.
     let _ = ((x() & 255) & 999999) as u8;
     // Don't lint.
     let _ = (999999 & (x() & 255)) as u8;

     (256 & 999999u64) as u8;
     //~^ ERROR: casting `u64` to `u8` may truncate the value
     (255 % 999999u64) as u8;
     //~^ ERROR: casting `u64` to `u8` may truncate the value
 }
	//@no-rustfix

	#![feature(repr128)]
	#![allow(incomplete_features)]
	#![warn(
	clippy::cast_precision_loss,
	clippy::cast_possible_truncation,
	clippy::cast_sign_loss,
	clippy::cast_possible_wrap
	)]
	#![allow(
	clippy::cast_abs_to_unsigned,
	clippy::no_effect,
	clippy::unnecessary_min_or_max,
	clippy::unnecessary_operation,
	clippy::unnecessary_literal_unwrap,
	clippy::identity_op
	)]

	// FIXME(f16_f128): add tests once const casting is available for these types

	fn main() {
	// Test clippy::cast_precision_loss
	let x0 = 1i32;
	x0 as f32;
	//~^ ERROR: casting `i32` to `f32` causes a loss of precision (`i32` is 32 bits wide,
	//~\| NOTE: `-D clippy::cast-precision-loss` implied by `-D warnings`
	let x1 = 1i64;
	x1 as f32;
	//~^ ERROR: casting `i64` to `f32` causes a loss of precision (`i64` is 64 bits wide,
	x1 as f64;
	//~^ ERROR: casting `i64` to `f64` causes a loss of precision (`i64` is 64 bits wide,
	let x2 = 1u32;
	x2 as f32;
	//~^ ERROR: casting `u32` to `f32` causes a loss of precision (`u32` is 32 bits wide,
	let x3 = 1u64;
	x3 as f32;
	//~^ ERROR: casting `u64` to `f32` causes a loss of precision (`u64` is 64 bits wide,
	x3 as f64;
	//~^ ERROR: casting `u64` to `f64` causes a loss of precision (`u64` is 64 bits wide,
	// Test clippy::cast_possible_truncation
	1f32 as i32;
	//~^ ERROR: casting `f32` to `i32` may truncate the value
	1f32 as u32;
	//~^ ERROR: casting `f32` to `u32` may truncate the value
	//~\| ERROR: casting `f32` to `u32` may lose the sign of the value
	//~\| NOTE: `-D clippy::cast-sign-loss` implied by `-D warnings`
	1f64 as f32;
	//~^ ERROR: casting `f64` to `f32` may truncate the value
	1i32 as i8;
	//~^ ERROR: casting `i32` to `i8` may truncate the value
	1i32 as u8;
	//~^ ERROR: casting `i32` to `u8` may truncate the value
	1f64 as isize;
	//~^ ERROR: casting `f64` to `isize` may truncate the value
	1f64 as usize;
	//~^ ERROR: casting `f64` to `usize` may truncate the value
	//~\| ERROR: casting `f64` to `usize` may lose the sign of the value
	1f32 as u32 as u16;
	//~^ ERROR: casting `u32` to `u16` may truncate the value
	//~\| ERROR: casting `f32` to `u32` may truncate the value
	//~\| ERROR: casting `f32` to `u32` may lose the sign of the value
	{
	let _x: i8 = 1i32 as _;
	//~^ ERROR: casting `i32` to `i8` may truncate the value
	1f32 as i32;
	//~^ ERROR: casting `f32` to `i32` may truncate the value
	1f64 as i32;
	//~^ ERROR: casting `f64` to `i32` may truncate the value
	1f32 as u8;
	//~^ ERROR: casting `f32` to `u8` may truncate the value
	//~\| ERROR: casting `f32` to `u8` may lose the sign of the value
	}
	// Test clippy::cast_possible_wrap
	1u8 as i8;
	//~^ ERROR: casting `u8` to `i8` may wrap around the value
	//~\| NOTE: `-D clippy::cast-possible-wrap` implied by `-D warnings`
	1u16 as i16;
	//~^ ERROR: casting `u16` to `i16` may wrap around the value
	1u32 as i32;
	//~^ ERROR: casting `u32` to `i32` may wrap around the value
	1u64 as i64;
	//~^ ERROR: casting `u64` to `i64` may wrap around the value
	1usize as isize;
	//~^ ERROR: casting `usize` to `isize` may wrap around the value
	// should not wrap, usize is never 8 bits
	1usize as i8;
	//~^ ERROR: casting `usize` to `i8` may truncate the value
	// wraps on 16 bit ptr size
	1usize as i16;
	//~^ ERROR: casting `usize` to `i16` may truncate the value
	//~\| ERROR: casting `usize` to `i16` may wrap around the value on targets with 16-bit
	//~\| NOTE: `usize` and `isize` may be as small as 16 bits on some platforms
	// wraps on 32 bit ptr size
	1usize as i32;
	//~^ ERROR: casting `usize` to `i32` may truncate the value on targets with 64-bit wid
	//~\| ERROR: casting `usize` to `i32` may wrap around the value on targets with 32-bit
	// wraps on 64 bit ptr size
	1usize as i64;
	//~^ ERROR: casting `usize` to `i64` may wrap around the value on targets with 64-bit
	// should not wrap, isize is never 8 bits
	1u8 as isize;
	// wraps on 16 bit ptr size
	1u16 as isize;
	//~^ ERROR: casting `u16` to `isize` may wrap around the value on targets with 16-bit
	//~\| NOTE: `usize` and `isize` may be as small as 16 bits on some platforms
	// wraps on 32 bit ptr size
	1u32 as isize;
	//~^ ERROR: casting `u32` to `isize` may wrap around the value on targets with 32-bit
	// wraps on 64 bit ptr size
	1u64 as isize;
	//~^ ERROR: casting `u64` to `isize` may truncate the value on targets with 32-bit wid
	//~\| ERROR: casting `u64` to `isize` may wrap around the value on targets with 64-bit
	// Test clippy::cast_sign_loss
	1i32 as u32;
	-1i32 as u32;
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
	1isize as usize;
	-1isize as usize;
	//~^ ERROR: casting `isize` to `usize` may lose the sign of the value
	0i8 as u8;
	i8::MAX as u8;
	i16::MAX as u16;
	i32::MAX as u32;
	i64::MAX as u64;
	i128::MAX as u128;

	(-1i8).saturating_abs() as u8;
	// abs() can return a negative value in release builds
	(i8::MIN).abs() as u8;
	//~^ ERROR: casting `i8` to `u8` may lose the sign of the value
	(-1i16).saturating_abs() as u16;
	(-1i32).saturating_abs() as u32;
	(-1i64).abs() as u64;
	(-1isize).abs() as usize;

	(-1i8).checked_abs().unwrap() as u8;
	(i8::MIN).checked_abs().unwrap() as u8;
	(-1i16).checked_abs().unwrap() as u16;
	(-1i32).checked_abs().unwrap() as u32;
	// SAFETY: -1 is a small number which will always return Some
	(unsafe { (-1i64).checked_abs().unwrap_unchecked() }) as u64;
	(-1isize).checked_abs().expect("-1 is a small number") as usize;

	(-1i8).isqrt() as u8;
	(i8::MIN).isqrt() as u8;
	(-1i16).isqrt() as u16;
	(-1i32).isqrt() as u32;
	(-1i64).isqrt() as u64;
	(-1isize).isqrt() as usize;

	(-1i8).checked_isqrt().unwrap() as u8;
	(i8::MIN).checked_isqrt().unwrap() as u8;
	(-1i16).checked_isqrt().unwrap() as u16;
	(-1i32).checked_isqrt().unwrap() as u32;
	// SAFETY: -1 is a small number which will always return Some
	(unsafe { (-1i64).checked_isqrt().unwrap_unchecked() }) as u64;
	(-1isize).checked_isqrt().expect("-1 is a small number") as usize;

	(-1i8).rem_euclid(1i8) as u8;
	(-1i8).wrapping_rem_euclid(1i8) as u16;
	(-1i16).rem_euclid(1i16) as u16;
	(-1i16).rem_euclid(1i16) as u32;
	(-1i32).rem_euclid(1i32) as u32;
	(-1i32).rem_euclid(1i32) as u64;
	(-1i64).rem_euclid(1i64) as u64;
	(-1i64).rem_euclid(1i64) as u128;
	(-1isize).rem_euclid(1isize) as usize;
	(1i8).rem_euclid(-1i8) as u8;
	(1i8).wrapping_rem_euclid(-1i8) as u16;
	(1i16).rem_euclid(-1i16) as u16;
	(1i16).rem_euclid(-1i16) as u32;
	(1i32).rem_euclid(-1i32) as u32;
	(1i32).rem_euclid(-1i32) as u64;
	(1i64).rem_euclid(-1i64) as u64;
	(1i64).rem_euclid(-1i64) as u128;
	(1isize).rem_euclid(-1isize) as usize;

	(-1i8).checked_rem_euclid(1i8).unwrap() as u8;
	(-1i8).checked_rem_euclid(1i8).unwrap() as u16;
	(-1i16).checked_rem_euclid(1i16).unwrap() as u16;
	(-1i16).checked_rem_euclid(1i16).unwrap() as u32;
	(-1i32).checked_rem_euclid(1i32).unwrap() as u32;
	(-1i32).checked_rem_euclid(1i32).unwrap() as u64;
	(-1i64).checked_rem_euclid(1i64).unwrap() as u64;
	(-1i64).checked_rem_euclid(1i64).unwrap() as u128;
	(-1isize).checked_rem_euclid(1isize).unwrap() as usize;
	(1i8).checked_rem_euclid(-1i8).unwrap() as u8;
	(1i8).checked_rem_euclid(-1i8).unwrap() as u16;
	(1i16).checked_rem_euclid(-1i16).unwrap() as u16;
	(1i16).checked_rem_euclid(-1i16).unwrap() as u32;
	(1i32).checked_rem_euclid(-1i32).unwrap() as u32;
	(1i32).checked_rem_euclid(-1i32).unwrap() as u64;
	(1i64).checked_rem_euclid(-1i64).unwrap() as u64;
	(1i64).checked_rem_euclid(-1i64).unwrap() as u128;
	(1isize).checked_rem_euclid(-1isize).unwrap() as usize;

	// no lint for `cast_possible_truncation`
	// with `signum` method call (see issue #5395)
	let x: i64 = 5;
	let _ = x.signum() as i32;

	let s = x.signum();
	let _ = s as i32;

	// Test for signed min
	// should be linted because signed
	(-99999999999i64).min(1) as i8;
	//~^ ERROR: casting `i64` to `i8` may truncate the value

	// Test for various operations that remove enough bits for the result to fit
	(999999u64 & 1) as u8;
	(999999u64 % 15) as u8;
	(999999u64 / 0x1_0000_0000_0000) as u16;
	({ 999999u64 >> 56 }) as u8;
	({
	let x = 999999u64;
	x.min(1)
	}) as u8;
	999999u64.clamp(0, 255) as u8;
	// should still be linted
	999999u64.clamp(0, 256) as u8;
	//~^ ERROR: casting `u64` to `u8` may truncate the value

	#[derive(Clone, Copy)]
	enum E1 {
	A,
	B,
	C,
	}
	impl E1 {
	fn test(self) {
	// Don't lint. `0..=2` fits in u8
	let _ = self as u8;
	}
	}

	#[derive(Clone, Copy)]
	enum E2 {
	A = 255,
	B,
	}
	impl E2 {
	fn test(self) {
	let _ = self as u8;
	//~^ ERROR: casting `main::E2` to `u8` may truncate the value
	let _ = Self::B as u8;
	//~^ ERROR: casting `main::E2::B` to `u8` will truncate the value
	//~\| NOTE: `-D clippy::cast-enum-truncation` implied by `-D warnings`
	// Don't lint. `255..=256` fits in i16
	let _ = self as i16;
	// Don't lint.
	let _ = Self::A as u8;
	}
	}

	#[derive(Clone, Copy)]
	enum E3 {
	A = -1,
	B,
	C = 50,
	}
	impl E3 {
	fn test(self) {
	// Don't lint. `-1..=50` fits in i8
	let _ = self as i8;
	}
	}

	#[derive(Clone, Copy)]
	enum E4 {
	A = -128,
	B,
	}
	impl E4 {
	fn test(self) {
	// Don't lint. `-128..=-127` fits in i8
	let _ = self as i8;
	}
	}

	#[derive(Clone, Copy)]
	enum E5 {
	A = -129,
	B = 127,
	}
	impl E5 {
	fn test(self) {
	let _ = self as i8;
	//~^ ERROR: casting `main::E5` to `i8` may truncate the value
	let _ = Self::A as i8;
	//~^ ERROR: casting `main::E5::A` to `i8` will truncate the value
	// Don't lint. `-129..=127` fits in i16
	let _ = self as i16;
	// Don't lint.
	let _ = Self::B as u8;
	}
	}

	#[derive(Clone, Copy)]
	#[repr(u32)]
	enum E6 {
	A = u16::MAX as u32,
	B,
	}
	impl E6 {
	fn test(self) {
	let _ = self as i16;
	//~^ ERROR: casting `main::E6` to `i16` may truncate the value
	// Don't lint. `2^16-1` fits in u16
	let _ = Self::A as u16;
	// Don't lint. `2^16-1..=2^16` fits in u32
	let _ = self as u32;
	// Don't lint.
	let _ = Self::A as u16;
	}
	}

	#[derive(Clone, Copy)]
	#[repr(u64)]
	enum E7 {
	A = u32::MAX as u64,
	B,
	}
	impl E7 {
	fn test(self) {
	let _ = self as usize;
	//~^ ERROR: casting `main::E7` to `usize` may truncate the value on targets wi
	// Don't lint.
	let _ = Self::A as usize;
	// Don't lint. `2^32-1..=2^32` fits in u64
	let _ = self as u64;
	}
	}

	#[derive(Clone, Copy)]
	#[repr(i128)]
	enum E8 {
	A = i128::MIN,
	B,
	C = 0,
	D = i128::MAX,
	}
	impl E8 {
	fn test(self) {
	// Don't lint. `-(2^127)..=2^127-1` fits it i128
	let _ = self as i128;
	}
	}

	#[derive(Clone, Copy)]
	#[repr(u128)]
	enum E9 {
	A,
	B = u128::MAX,
	}
	impl E9 {
	fn test(self) {
	// Don't lint.
	let _ = Self::A as u8;
	// Don't lint. `0..=2^128-1` fits in u128
	let _ = self as u128;
	}
	}

	#[derive(Clone, Copy)]
	#[repr(usize)]
	enum E10 {
	A,
	B = u32::MAX as usize,
	}
	impl E10 {
	fn test(self) {
	let _ = self as u16;
	//~^ ERROR: casting `main::E10` to `u16` may truncate the value
	// Don't lint.
	let _ = Self::B as u32;
	// Don't lint.
	let _ = self as u64;
	}
	}
	}

	fn avoid_subtract_overflow(q: u32) {
	let c = (q >> 16) as u8;
	//~^ ERROR: casting `u32` to `u8` may truncate the value
	c as usize;

	let c = (q / 1000) as u8;
	//~^ ERROR: casting `u32` to `u8` may truncate the value
	c as usize;
	}

	fn issue11426() {
	(&42u8 >> 0xa9008fb6c9d81e42_0e25730562a601c8_u128) as usize;
	}

	fn issue11642() {
	fn square(x: i16) -> u32 {
	let x = x as i32;
	(x * x) as u32;
	x.pow(2) as u32;
	(-2_i32).saturating_pow(2) as u32
	}

	let _a = \|x: i32\| -> u32 { (x * x * x * x) as u32 };

	(2_i32).checked_pow(3).unwrap() as u32;
	(-2_i32).pow(3) as u32;
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value

	(3_i32 % 2) as u32;
	(3_i32 % -2) as u32;
	(-5_i32 % 2) as u32;
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
	(-5_i32 % -2) as u32;
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
	(2_i32 >> 1) as u32;
	(-2_i32 >> 1) as u32;
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value

	let x: i32 = 10;
	(x * x) as u32;
	(x * x * x) as u32;
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value

	let y: i16 = -2;
	(y * y * y * y * -2) as u16;
	//~^ ERROR: casting `i16` to `u16` may lose the sign of the value
	(y * y * y / y * 2) as u16;
	(y * y / y * 2) as u16;
	//~^ ERROR: casting `i16` to `u16` may lose the sign of the value
	(y / y * y * -2) as u16;
	//~^ ERROR: casting `i16` to `u16` may lose the sign of the value

	(y + y + y + -2) as u16;
	//~^ ERROR: casting `i16` to `u16` may lose the sign of the value
	(y + y + y + 2) as u16;
	//~^ ERROR: casting `i16` to `u16` may lose the sign of the value

	let z: i16 = 2;
	(z + -2) as u16;
	//~^ ERROR: casting `i16` to `u16` may lose the sign of the value
	(z + z + 2) as u16;

	fn foo(a: i32, b: i32, c: i32) -> u32 {
	(a * a * b * b * c * c) as u32;
	(a * b * c) as u32;
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
	(a * -b * c) as u32;
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
	(a * b * c * c) as u32;
	(a * -2) as u32;
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
	(a * b * c * -2) as u32;
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
	(a / b) as u32;
	(a / b * c) as u32;
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
	(a / b + b * c) as u32;
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
	a.saturating_pow(3) as u32;
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
	(a.abs() * b.pow(2) / c.abs()) as u32
	//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
	}
	}

	fn issue11738() {
	macro_rules! m {
	() => {
	let _ = i32::MIN as u32; // cast_sign_loss
	let _ = u32::MAX as u8; // cast_possible_truncation
	let _ = std::f64::consts::PI as f32; // cast_possible_truncation
	let _ = 0i8 as i32; // cast_lossless
	};
	}
	m!();
	}

	fn issue12506() -> usize {
	let bar: Result<Option<i64>, u32> = Ok(Some(10));
	bar.unwrap().unwrap() as usize
	}

	fn issue12721() {
	fn x() -> u64 {
	u64::MAX
	}

	// Don't lint.
	(255 & 999999u64) as u8;
	// Don't lint.
	let _ = ((x() & 255) & 999999) as u8;
	// Don't lint.
	let _ = (999999 & (x() & 255)) as u8;

	(256 & 999999u64) as u8;
	//~^ ERROR: casting `u64` to `u8` may truncate the value
	(255 % 999999u64) as u8;
	//~^ ERROR: casting `u64` to `u8` may truncate the value
	}