501 lines
16 KiB
Rust
501 lines
16 KiB
Rust
//@no-rustfix
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#![feature(repr128)]
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#![feature(isqrt)]
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#![allow(incomplete_features)]
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#![warn(
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clippy::cast_precision_loss,
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clippy::cast_possible_truncation,
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clippy::cast_sign_loss,
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clippy::cast_possible_wrap
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)]
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#![allow(
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clippy::cast_abs_to_unsigned,
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clippy::no_effect,
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clippy::unnecessary_operation,
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clippy::unnecessary_literal_unwrap,
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clippy::identity_op
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)]
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fn main() {
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// Test clippy::cast_precision_loss
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let x0 = 1i32;
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x0 as f32;
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//~^ ERROR: casting `i32` to `f32` causes a loss of precision (`i32` is 32 bits wide,
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//~| NOTE: `-D clippy::cast-precision-loss` implied by `-D warnings`
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let x1 = 1i64;
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x1 as f32;
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//~^ ERROR: casting `i64` to `f32` causes a loss of precision (`i64` is 64 bits wide,
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x1 as f64;
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//~^ ERROR: casting `i64` to `f64` causes a loss of precision (`i64` is 64 bits wide,
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let x2 = 1u32;
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x2 as f32;
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//~^ ERROR: casting `u32` to `f32` causes a loss of precision (`u32` is 32 bits wide,
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let x3 = 1u64;
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x3 as f32;
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//~^ ERROR: casting `u64` to `f32` causes a loss of precision (`u64` is 64 bits wide,
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x3 as f64;
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//~^ ERROR: casting `u64` to `f64` causes a loss of precision (`u64` is 64 bits wide,
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// Test clippy::cast_possible_truncation
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1f32 as i32;
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//~^ ERROR: casting `f32` to `i32` may truncate the value
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1f32 as u32;
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//~^ ERROR: casting `f32` to `u32` may truncate the value
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//~| ERROR: casting `f32` to `u32` may lose the sign of the value
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//~| NOTE: `-D clippy::cast-sign-loss` implied by `-D warnings`
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1f64 as f32;
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//~^ ERROR: casting `f64` to `f32` may truncate the value
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1i32 as i8;
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//~^ ERROR: casting `i32` to `i8` may truncate the value
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1i32 as u8;
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//~^ ERROR: casting `i32` to `u8` may truncate the value
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1f64 as isize;
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//~^ ERROR: casting `f64` to `isize` may truncate the value
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1f64 as usize;
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//~^ ERROR: casting `f64` to `usize` may truncate the value
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//~| ERROR: casting `f64` to `usize` may lose the sign of the value
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1f32 as u32 as u16;
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//~^ ERROR: casting `u32` to `u16` may truncate the value
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//~| ERROR: casting `f32` to `u32` may truncate the value
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//~| ERROR: casting `f32` to `u32` may lose the sign of the value
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{
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let _x: i8 = 1i32 as _;
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//~^ ERROR: casting `i32` to `i8` may truncate the value
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1f32 as i32;
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//~^ ERROR: casting `f32` to `i32` may truncate the value
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1f64 as i32;
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//~^ ERROR: casting `f64` to `i32` may truncate the value
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1f32 as u8;
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//~^ ERROR: casting `f32` to `u8` may truncate the value
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//~| ERROR: casting `f32` to `u8` may lose the sign of the value
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}
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// Test clippy::cast_possible_wrap
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1u8 as i8;
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//~^ ERROR: casting `u8` to `i8` may wrap around the value
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//~| NOTE: `-D clippy::cast-possible-wrap` implied by `-D warnings`
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1u16 as i16;
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//~^ ERROR: casting `u16` to `i16` may wrap around the value
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1u32 as i32;
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//~^ ERROR: casting `u32` to `i32` may wrap around the value
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1u64 as i64;
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//~^ ERROR: casting `u64` to `i64` may wrap around the value
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1usize as isize;
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//~^ ERROR: casting `usize` to `isize` may wrap around the value
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// should not wrap, usize is never 8 bits
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1usize as i8;
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//~^ ERROR: casting `usize` to `i8` may truncate the value
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// wraps on 16 bit ptr size
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1usize as i16;
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//~^ ERROR: casting `usize` to `i16` may truncate the value
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//~| ERROR: casting `usize` to `i16` may wrap around the value on targets with 16-bit
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//~| NOTE: `usize` and `isize` may be as small as 16 bits on some platforms
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// wraps on 32 bit ptr size
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1usize as i32;
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//~^ ERROR: casting `usize` to `i32` may truncate the value on targets with 64-bit wid
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//~| ERROR: casting `usize` to `i32` may wrap around the value on targets with 32-bit
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// wraps on 64 bit ptr size
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1usize as i64;
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//~^ ERROR: casting `usize` to `i64` may wrap around the value on targets with 64-bit
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// should not wrap, isize is never 8 bits
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1u8 as isize;
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// wraps on 16 bit ptr size
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1u16 as isize;
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//~^ ERROR: casting `u16` to `isize` may wrap around the value on targets with 16-bit
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//~| NOTE: `usize` and `isize` may be as small as 16 bits on some platforms
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// wraps on 32 bit ptr size
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1u32 as isize;
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//~^ ERROR: casting `u32` to `isize` may wrap around the value on targets with 32-bit
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// wraps on 64 bit ptr size
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1u64 as isize;
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//~^ ERROR: casting `u64` to `isize` may truncate the value on targets with 32-bit wid
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//~| ERROR: casting `u64` to `isize` may wrap around the value on targets with 64-bit
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// Test clippy::cast_sign_loss
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1i32 as u32;
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-1i32 as u32;
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//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
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1isize as usize;
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-1isize as usize;
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//~^ ERROR: casting `isize` to `usize` may lose the sign of the value
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0i8 as u8;
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i8::MAX as u8;
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i16::MAX as u16;
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i32::MAX as u32;
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i64::MAX as u64;
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i128::MAX as u128;
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(-1i8).saturating_abs() as u8;
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// abs() can return a negative value in release builds
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(i8::MIN).abs() as u8;
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//~^ ERROR: casting `i8` to `u8` may lose the sign of the value
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(-1i16).saturating_abs() as u16;
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(-1i32).saturating_abs() as u32;
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(-1i64).abs() as u64;
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(-1isize).abs() as usize;
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(-1i8).checked_abs().unwrap() as u8;
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(i8::MIN).checked_abs().unwrap() as u8;
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(-1i16).checked_abs().unwrap() as u16;
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(-1i32).checked_abs().unwrap() as u32;
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// SAFETY: -1 is a small number which will always return Some
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(unsafe { (-1i64).checked_abs().unwrap_unchecked() }) as u64;
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(-1isize).checked_abs().expect("-1 is a small number") as usize;
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(-1i8).isqrt() as u8;
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(i8::MIN).isqrt() as u8;
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(-1i16).isqrt() as u16;
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(-1i32).isqrt() as u32;
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(-1i64).isqrt() as u64;
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(-1isize).isqrt() as usize;
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(-1i8).checked_isqrt().unwrap() as u8;
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(i8::MIN).checked_isqrt().unwrap() as u8;
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(-1i16).checked_isqrt().unwrap() as u16;
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(-1i32).checked_isqrt().unwrap() as u32;
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// SAFETY: -1 is a small number which will always return Some
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(unsafe { (-1i64).checked_isqrt().unwrap_unchecked() }) as u64;
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(-1isize).checked_isqrt().expect("-1 is a small number") as usize;
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(-1i8).rem_euclid(1i8) as u8;
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(-1i8).wrapping_rem_euclid(1i8) as u16;
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(-1i16).rem_euclid(1i16) as u16;
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(-1i16).rem_euclid(1i16) as u32;
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(-1i32).rem_euclid(1i32) as u32;
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(-1i32).rem_euclid(1i32) as u64;
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(-1i64).rem_euclid(1i64) as u64;
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(-1i64).rem_euclid(1i64) as u128;
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(-1isize).rem_euclid(1isize) as usize;
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(1i8).rem_euclid(-1i8) as u8;
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(1i8).wrapping_rem_euclid(-1i8) as u16;
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(1i16).rem_euclid(-1i16) as u16;
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(1i16).rem_euclid(-1i16) as u32;
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(1i32).rem_euclid(-1i32) as u32;
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(1i32).rem_euclid(-1i32) as u64;
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(1i64).rem_euclid(-1i64) as u64;
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(1i64).rem_euclid(-1i64) as u128;
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(1isize).rem_euclid(-1isize) as usize;
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(-1i8).checked_rem_euclid(1i8).unwrap() as u8;
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(-1i8).checked_rem_euclid(1i8).unwrap() as u16;
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(-1i16).checked_rem_euclid(1i16).unwrap() as u16;
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(-1i16).checked_rem_euclid(1i16).unwrap() as u32;
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(-1i32).checked_rem_euclid(1i32).unwrap() as u32;
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(-1i32).checked_rem_euclid(1i32).unwrap() as u64;
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(-1i64).checked_rem_euclid(1i64).unwrap() as u64;
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(-1i64).checked_rem_euclid(1i64).unwrap() as u128;
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(-1isize).checked_rem_euclid(1isize).unwrap() as usize;
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(1i8).checked_rem_euclid(-1i8).unwrap() as u8;
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(1i8).checked_rem_euclid(-1i8).unwrap() as u16;
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(1i16).checked_rem_euclid(-1i16).unwrap() as u16;
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(1i16).checked_rem_euclid(-1i16).unwrap() as u32;
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(1i32).checked_rem_euclid(-1i32).unwrap() as u32;
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(1i32).checked_rem_euclid(-1i32).unwrap() as u64;
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(1i64).checked_rem_euclid(-1i64).unwrap() as u64;
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(1i64).checked_rem_euclid(-1i64).unwrap() as u128;
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(1isize).checked_rem_euclid(-1isize).unwrap() as usize;
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// no lint for `cast_possible_truncation`
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// with `signum` method call (see issue #5395)
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let x: i64 = 5;
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let _ = x.signum() as i32;
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let s = x.signum();
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let _ = s as i32;
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// Test for signed min
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// should be linted because signed
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(-99999999999i64).min(1) as i8;
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//~^ ERROR: casting `i64` to `i8` may truncate the value
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// Test for various operations that remove enough bits for the result to fit
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(999999u64 & 1) as u8;
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(999999u64 % 15) as u8;
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(999999u64 / 0x1_0000_0000_0000) as u16;
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({ 999999u64 >> 56 }) as u8;
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({
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let x = 999999u64;
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x.min(1)
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}) as u8;
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999999u64.clamp(0, 255) as u8;
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// should still be linted
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999999u64.clamp(0, 256) as u8;
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//~^ ERROR: casting `u64` to `u8` may truncate the value
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#[derive(Clone, Copy)]
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enum E1 {
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A,
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B,
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C,
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}
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impl E1 {
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fn test(self) {
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// Don't lint. `0..=2` fits in u8
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let _ = self as u8;
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}
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}
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#[derive(Clone, Copy)]
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enum E2 {
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A = 255,
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B,
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}
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impl E2 {
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fn test(self) {
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let _ = self as u8;
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//~^ ERROR: casting `main::E2` to `u8` may truncate the value
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let _ = Self::B as u8;
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//~^ ERROR: casting `main::E2::B` to `u8` will truncate the value
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//~| NOTE: `-D clippy::cast-enum-truncation` implied by `-D warnings`
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// Don't lint. `255..=256` fits in i16
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let _ = self as i16;
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// Don't lint.
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let _ = Self::A as u8;
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}
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}
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#[derive(Clone, Copy)]
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enum E3 {
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A = -1,
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B,
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C = 50,
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}
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impl E3 {
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fn test(self) {
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// Don't lint. `-1..=50` fits in i8
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let _ = self as i8;
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}
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}
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#[derive(Clone, Copy)]
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enum E4 {
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A = -128,
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B,
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}
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impl E4 {
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fn test(self) {
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// Don't lint. `-128..=-127` fits in i8
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let _ = self as i8;
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}
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}
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#[derive(Clone, Copy)]
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enum E5 {
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A = -129,
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B = 127,
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}
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impl E5 {
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fn test(self) {
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let _ = self as i8;
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//~^ ERROR: casting `main::E5` to `i8` may truncate the value
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let _ = Self::A as i8;
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//~^ ERROR: casting `main::E5::A` to `i8` will truncate the value
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// Don't lint. `-129..=127` fits in i16
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let _ = self as i16;
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// Don't lint.
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let _ = Self::B as u8;
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}
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}
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#[derive(Clone, Copy)]
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#[repr(u32)]
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enum E6 {
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A = u16::MAX as u32,
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B,
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}
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impl E6 {
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fn test(self) {
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let _ = self as i16;
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//~^ ERROR: casting `main::E6` to `i16` may truncate the value
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// Don't lint. `2^16-1` fits in u16
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let _ = Self::A as u16;
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// Don't lint. `2^16-1..=2^16` fits in u32
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let _ = self as u32;
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// Don't lint.
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let _ = Self::A as u16;
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}
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}
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#[derive(Clone, Copy)]
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#[repr(u64)]
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enum E7 {
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A = u32::MAX as u64,
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B,
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}
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impl E7 {
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fn test(self) {
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let _ = self as usize;
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//~^ ERROR: casting `main::E7` to `usize` may truncate the value on targets wi
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// Don't lint.
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let _ = Self::A as usize;
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// Don't lint. `2^32-1..=2^32` fits in u64
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let _ = self as u64;
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}
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}
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#[derive(Clone, Copy)]
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#[repr(i128)]
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enum E8 {
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A = i128::MIN,
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B,
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C = 0,
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D = i128::MAX,
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}
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impl E8 {
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fn test(self) {
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// Don't lint. `-(2^127)..=2^127-1` fits it i128
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let _ = self as i128;
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}
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}
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#[derive(Clone, Copy)]
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#[repr(u128)]
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enum E9 {
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A,
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B = u128::MAX,
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}
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impl E9 {
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fn test(self) {
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// Don't lint.
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let _ = Self::A as u8;
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// Don't lint. `0..=2^128-1` fits in u128
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let _ = self as u128;
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}
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}
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#[derive(Clone, Copy)]
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#[repr(usize)]
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enum E10 {
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A,
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B = u32::MAX as usize,
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}
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impl E10 {
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fn test(self) {
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let _ = self as u16;
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//~^ ERROR: casting `main::E10` to `u16` may truncate the value
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// Don't lint.
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let _ = Self::B as u32;
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// Don't lint.
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let _ = self as u64;
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}
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}
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}
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fn avoid_subtract_overflow(q: u32) {
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let c = (q >> 16) as u8;
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//~^ ERROR: casting `u32` to `u8` may truncate the value
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c as usize;
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let c = (q / 1000) as u8;
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//~^ ERROR: casting `u32` to `u8` may truncate the value
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c as usize;
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}
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fn issue11426() {
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(&42u8 >> 0xa9008fb6c9d81e42_0e25730562a601c8_u128) as usize;
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}
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fn issue11642() {
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fn square(x: i16) -> u32 {
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let x = x as i32;
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(x * x) as u32;
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x.pow(2) as u32;
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(-2_i32).saturating_pow(2) as u32
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}
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let _a = |x: i32| -> u32 { (x * x * x * x) as u32 };
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(2_i32).checked_pow(3).unwrap() as u32;
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(-2_i32).pow(3) as u32;
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//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
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(3_i32 % 2) as u32;
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(3_i32 % -2) as u32;
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(-5_i32 % 2) as u32;
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//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
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(-5_i32 % -2) as u32;
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//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
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(2_i32 >> 1) as u32;
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(-2_i32 >> 1) as u32;
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//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
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let x: i32 = 10;
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(x * x) as u32;
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(x * x * x) as u32;
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//~^ ERROR: casting `i32` to `u32` may lose the sign of the value
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let y: i16 = -2;
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(y * y * y * y * -2) as u16;
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//~^ ERROR: casting `i16` to `u16` may lose the sign of the value
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(y * y * y / y * 2) as u16;
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(y * y / y * 2) as u16;
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//~^ ERROR: casting `i16` to `u16` may lose the sign of the value
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(y / y * y * -2) as u16;
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//~^ ERROR: casting `i16` to `u16` may lose the sign of the value
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(y + y + y + -2) as u16;
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//~^ ERROR: casting `i16` to `u16` may lose the sign of the value
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(y + y + y + 2) as u16;
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//~^ 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
|
|
}
|