rust-clippy/tests/ui/cast.stderr

error: casting `i32` to `f32` causes a loss of precision (`i32` is 32 bits wide, but `f32`'s mantissa is only 23 bits wide)
  --> $DIR/cast.rs:14:5
   |
LL |     x0 as f32;
   |     ^^^^^^^^^
   |
   = note: `-D clippy::cast-precision-loss` implied by `-D warnings`

error: casting `i64` to `f32` causes a loss of precision (`i64` is 64 bits wide, but `f32`'s mantissa is only 23 bits wide)
  --> $DIR/cast.rs:16:5
   |
LL |     x1 as f32;
   |     ^^^^^^^^^

error: casting `i64` to `f64` causes a loss of precision (`i64` is 64 bits wide, but `f64`'s mantissa is only 52 bits wide)
  --> $DIR/cast.rs:17:5
   |
LL |     x1 as f64;
   |     ^^^^^^^^^

error: casting `u32` to `f32` causes a loss of precision (`u32` is 32 bits wide, but `f32`'s mantissa is only 23 bits wide)
  --> $DIR/cast.rs:19:5
   |
LL |     x2 as f32;
   |     ^^^^^^^^^

error: casting `u64` to `f32` causes a loss of precision (`u64` is 64 bits wide, but `f32`'s mantissa is only 23 bits wide)
  --> $DIR/cast.rs:21:5
   |
LL |     x3 as f32;
   |     ^^^^^^^^^

error: casting `u64` to `f64` causes a loss of precision (`u64` is 64 bits wide, but `f64`'s mantissa is only 52 bits wide)
  --> $DIR/cast.rs:22:5
   |
LL |     x3 as f64;
   |     ^^^^^^^^^

error: casting `f32` to `i32` may truncate the value
  --> $DIR/cast.rs:24:5
   |
LL |     1f32 as i32;
   |     ^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
   = note: `-D clippy::cast-possible-truncation` implied by `-D warnings`

error: casting `f32` to `u32` may truncate the value
  --> $DIR/cast.rs:25:5
   |
LL |     1f32 as u32;
   |     ^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...

error: casting `f32` to `u32` may lose the sign of the value
  --> $DIR/cast.rs:25:5
   |
LL |     1f32 as u32;
   |     ^^^^^^^^^^^
   |
   = note: `-D clippy::cast-sign-loss` implied by `-D warnings`

error: casting `f64` to `f32` may truncate the value
  --> $DIR/cast.rs:26:5
   |
LL |     1f64 as f32;
   |     ^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...

error: casting `i32` to `i8` may truncate the value
  --> $DIR/cast.rs:27:5
   |
LL |     1i32 as i8;
   |     ^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |     i8::try_from(1i32);
   |     ~~~~~~~~~~~~~~~~~~

error: casting `i32` to `u8` may truncate the value
  --> $DIR/cast.rs:28:5
   |
LL |     1i32 as u8;
   |     ^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |     u8::try_from(1i32);
   |     ~~~~~~~~~~~~~~~~~~

error: casting `f64` to `isize` may truncate the value
  --> $DIR/cast.rs:29:5
   |
LL |     1f64 as isize;
   |     ^^^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...

error: casting `f64` to `usize` may truncate the value
  --> $DIR/cast.rs:30:5
   |
LL |     1f64 as usize;
   |     ^^^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...

error: casting `f64` to `usize` may lose the sign of the value
  --> $DIR/cast.rs:30:5
   |
LL |     1f64 as usize;
   |     ^^^^^^^^^^^^^

error: casting `u32` to `u16` may truncate the value
  --> $DIR/cast.rs:31:5
   |
LL |     1f32 as u32 as u16;
   |     ^^^^^^^^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |     u16::try_from(1f32 as u32);
   |     ~~~~~~~~~~~~~~~~~~~~~~~~~~

error: casting `f32` to `u32` may truncate the value
  --> $DIR/cast.rs:31:5
   |
LL |     1f32 as u32 as u16;
   |     ^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...

error: casting `f32` to `u32` may lose the sign of the value
  --> $DIR/cast.rs:31:5
   |
LL |     1f32 as u32 as u16;
   |     ^^^^^^^^^^^

error: casting `i32` to `i8` may truncate the value
  --> $DIR/cast.rs:33:22
   |
LL |         let _x: i8 = 1i32 as _;
   |                      ^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |         let _x: i8 = 1i32.try_into();
   |                      ~~~~~~~~~~~~~~~

error: casting `f32` to `i32` may truncate the value
  --> $DIR/cast.rs:34:9
   |
LL |         1f32 as i32;
   |         ^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...

error: casting `f64` to `i32` may truncate the value
  --> $DIR/cast.rs:35:9
   |
LL |         1f64 as i32;
   |         ^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...

error: casting `f32` to `u8` may truncate the value
  --> $DIR/cast.rs:36:9
   |
LL |         1f32 as u8;
   |         ^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...

error: casting `f32` to `u8` may lose the sign of the value
  --> $DIR/cast.rs:36:9
   |
LL |         1f32 as u8;
   |         ^^^^^^^^^^

error: casting `u8` to `i8` may wrap around the value
  --> $DIR/cast.rs:39:5
   |
LL |     1u8 as i8;
   |     ^^^^^^^^^
   |
   = note: `-D clippy::cast-possible-wrap` implied by `-D warnings`

error: casting `u16` to `i16` may wrap around the value
  --> $DIR/cast.rs:40:5
   |
LL |     1u16 as i16;
   |     ^^^^^^^^^^^

error: casting `u32` to `i32` may wrap around the value
  --> $DIR/cast.rs:41:5
   |
LL |     1u32 as i32;
   |     ^^^^^^^^^^^

error: casting `u64` to `i64` may wrap around the value
  --> $DIR/cast.rs:42:5
   |
LL |     1u64 as i64;
   |     ^^^^^^^^^^^

error: casting `usize` to `isize` may wrap around the value
  --> $DIR/cast.rs:43:5
   |
LL |     1usize as isize;
   |     ^^^^^^^^^^^^^^^

error: casting `usize` to `i8` may truncate the value
  --> $DIR/cast.rs:44:5
   |
LL |     1usize as i8; // should not wrap, usize is never 8 bits
   |     ^^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |     i8::try_from(1usize); // should not wrap, usize is never 8 bits
   |     ~~~~~~~~~~~~~~~~~~~~

error: casting `usize` to `i16` may truncate the value
  --> $DIR/cast.rs:45:5
   |
LL |     1usize as i16; // wraps on 16 bit ptr size
   |     ^^^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |     i16::try_from(1usize); // wraps on 16 bit ptr size
   |     ~~~~~~~~~~~~~~~~~~~~~

error: casting `usize` to `i16` may wrap around the value on targets with 16-bit wide pointers
  --> $DIR/cast.rs:45:5
   |
LL |     1usize as i16; // wraps on 16 bit ptr size
   |     ^^^^^^^^^^^^^
   |
   = note: `usize` and `isize` may be as small as 16 bits on some platforms
   = note: for more information see https://doc.rust-lang.org/reference/types/numeric.html#machine-dependent-integer-types

error: casting `usize` to `i32` may truncate the value on targets with 64-bit wide pointers
  --> $DIR/cast.rs:46:5
   |
LL |     1usize as i32; // wraps on 32 bit ptr size
   |     ^^^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |     i32::try_from(1usize); // wraps on 32 bit ptr size
   |     ~~~~~~~~~~~~~~~~~~~~~

error: casting `usize` to `i32` may wrap around the value on targets with 32-bit wide pointers
  --> $DIR/cast.rs:46:5
   |
LL |     1usize as i32; // wraps on 32 bit ptr size
   |     ^^^^^^^^^^^^^

error: casting `usize` to `i64` may wrap around the value on targets with 64-bit wide pointers
  --> $DIR/cast.rs:47:5
   |
LL |     1usize as i64; // wraps on 64 bit ptr size
   |     ^^^^^^^^^^^^^

error: casting `u16` to `isize` may wrap around the value on targets with 16-bit wide pointers
  --> $DIR/cast.rs:49:5
   |
LL |     1u16 as isize; // wraps on 16 bit ptr size
   |     ^^^^^^^^^^^^^
   |
   = note: `usize` and `isize` may be as small as 16 bits on some platforms
   = note: for more information see https://doc.rust-lang.org/reference/types/numeric.html#machine-dependent-integer-types

error: casting `u32` to `isize` may wrap around the value on targets with 32-bit wide pointers
  --> $DIR/cast.rs:50:5
   |
LL |     1u32 as isize; // wraps on 32 bit ptr size
   |     ^^^^^^^^^^^^^

error: casting `u64` to `isize` may truncate the value on targets with 32-bit wide pointers
  --> $DIR/cast.rs:51:5
   |
LL |     1u64 as isize; // wraps on 64 bit ptr size
   |     ^^^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |     isize::try_from(1u64); // wraps on 64 bit ptr size
   |     ~~~~~~~~~~~~~~~~~~~~~

error: casting `u64` to `isize` may wrap around the value on targets with 64-bit wide pointers
  --> $DIR/cast.rs:51:5
   |
LL |     1u64 as isize; // wraps on 64 bit ptr size
   |     ^^^^^^^^^^^^^

error: casting `i32` to `u32` may lose the sign of the value
  --> $DIR/cast.rs:54:5
   |
LL |     -1i32 as u32;
   |     ^^^^^^^^^^^^

error: casting `isize` to `usize` may lose the sign of the value
  --> $DIR/cast.rs:56:5
   |
LL |     -1isize as usize;
   |     ^^^^^^^^^^^^^^^^

error: casting `i64` to `i8` may truncate the value
  --> $DIR/cast.rs:123:5
   |
LL |     (-99999999999i64).min(1) as i8; // should be linted because signed
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |     i8::try_from((-99999999999i64).min(1)); // should be linted because signed
   |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

error: casting `u64` to `u8` may truncate the value
  --> $DIR/cast.rs:135:5
   |
LL |     999999u64.clamp(0, 256) as u8; // should still be linted
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |     u8::try_from(999999u64.clamp(0, 256)); // should still be linted
   |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

error: casting `main::E2` to `u8` may truncate the value
  --> $DIR/cast.rs:156:21
   |
LL |             let _ = self as u8;
   |                     ^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |             let _ = u8::try_from(self);
   |                     ~~~~~~~~~~~~~~~~~~

error: casting `main::E2::B` to `u8` will truncate the value
  --> $DIR/cast.rs:157:21
   |
LL |             let _ = Self::B as u8;
   |                     ^^^^^^^^^^^^^
   |
   = note: `-D clippy::cast-enum-truncation` implied by `-D warnings`

error: casting `main::E5` to `i8` may truncate the value
  --> $DIR/cast.rs:193:21
   |
LL |             let _ = self as i8;
   |                     ^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |             let _ = i8::try_from(self);
   |                     ~~~~~~~~~~~~~~~~~~

error: casting `main::E5::A` to `i8` will truncate the value
  --> $DIR/cast.rs:194:21
   |
LL |             let _ = Self::A as i8;
   |                     ^^^^^^^^^^^^^

error: casting `main::E6` to `i16` may truncate the value
  --> $DIR/cast.rs:208:21
   |
LL |             let _ = self as i16;
   |                     ^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |             let _ = i16::try_from(self);
   |                     ~~~~~~~~~~~~~~~~~~~

error: casting `main::E7` to `usize` may truncate the value on targets with 32-bit wide pointers
  --> $DIR/cast.rs:223:21
   |
LL |             let _ = self as usize;
   |                     ^^^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |             let _ = usize::try_from(self);
   |                     ~~~~~~~~~~~~~~~~~~~~~

error: casting `main::E10` to `u16` may truncate the value
  --> $DIR/cast.rs:264:21
   |
LL |             let _ = self as u16;
   |                     ^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |             let _ = u16::try_from(self);
   |                     ~~~~~~~~~~~~~~~~~~~

error: casting `u32` to `u8` may truncate the value
  --> $DIR/cast.rs:272:13
   |
LL |     let c = (q >> 16) as u8;
   |             ^^^^^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |     let c = u8::try_from(q >> 16);
   |             ~~~~~~~~~~~~~~~~~~~~~

error: casting `u32` to `u8` may truncate the value
  --> $DIR/cast.rs:275:13
   |
LL |     let c = (q / 1000) as u8;
   |             ^^^^^^^^^^^^^^^^
   |
   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
   |
LL |     let c = u8::try_from(q / 1000);
   |             ~~~~~~~~~~~~~~~~~~~~~~

error: aborting due to 51 previous errors