rust-clippy/tests/ui/eager_transmute.stderr

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:21:33
   |
LL |     (op < 4).then_some(unsafe { std::mem::transmute(op) })
   |                                 ^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::eager-transmute` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::eager_transmute)]`
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     (op < 4).then(|| unsafe { std::mem::transmute(op) })
   |              ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:27:33
   |
LL |     (op < 4).then_some(unsafe { std::mem::transmute::<_, Opcode>(op) });
   |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     (op < 4).then(|| unsafe { std::mem::transmute::<_, Opcode>(op) });
   |              ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:28:33
   |
LL |     (op > 4).then_some(unsafe { std::mem::transmute::<_, Opcode>(op) });
   |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     (op > 4).then(|| unsafe { std::mem::transmute::<_, Opcode>(op) });
   |              ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:29:34
   |
LL |     (op == 0).then_some(unsafe { std::mem::transmute::<_, Opcode>(op) });
   |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     (op == 0).then(|| unsafe { std::mem::transmute::<_, Opcode>(op) });
   |               ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:31:68
   |
LL |     let _: Option<Opcode> = (op > 0 && op < 10).then_some(unsafe { std::mem::transmute(op) });
   |                                                                    ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     let _: Option<Opcode> = (op > 0 && op < 10).then(|| unsafe { std::mem::transmute(op) });
   |                                                 ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:32:86
   |
LL |     let _: Option<Opcode> = (op > 0 && op < 10 && unrelated == 0).then_some(unsafe { std::mem::transmute(op) });
   |                                                                                      ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     let _: Option<Opcode> = (op > 0 && op < 10 && unrelated == 0).then(|| unsafe { std::mem::transmute(op) });
   |                                                                   ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:35:84
   |
LL |     let _: Option<Opcode> = (op2.foo[0] > 0 && op2.foo[0] < 10).then_some(unsafe { std::mem::transmute(op2.foo[0]) });
   |                                                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     let _: Option<Opcode> = (op2.foo[0] > 0 && op2.foo[0] < 10).then(|| unsafe { std::mem::transmute(op2.foo[0]) });
   |                                                                 ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:47:70
   |
LL |     let _: Option<Opcode> = (1..=3).contains(&op).then_some(unsafe { std::mem::transmute(op) });
   |                                                                      ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     let _: Option<Opcode> = (1..=3).contains(&op).then(|| unsafe { std::mem::transmute(op) });
   |                                                   ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:48:83
   |
LL |     let _: Option<Opcode> = ((1..=3).contains(&op) || op == 4).then_some(unsafe { std::mem::transmute(op) });
   |                                                                                   ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     let _: Option<Opcode> = ((1..=3).contains(&op) || op == 4).then(|| unsafe { std::mem::transmute(op) });
   |                                                                ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:49:69
   |
LL |     let _: Option<Opcode> = (1..3).contains(&op).then_some(unsafe { std::mem::transmute(op) });
   |                                                                     ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     let _: Option<Opcode> = (1..3).contains(&op).then(|| unsafe { std::mem::transmute(op) });
   |                                                  ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:50:68
   |
LL |     let _: Option<Opcode> = (1..).contains(&op).then_some(unsafe { std::mem::transmute(op) });
   |                                                                    ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     let _: Option<Opcode> = (1..).contains(&op).then(|| unsafe { std::mem::transmute(op) });
   |                                                 ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:51:68
   |
LL |     let _: Option<Opcode> = (..3).contains(&op).then_some(unsafe { std::mem::transmute(op) });
   |                                                                    ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     let _: Option<Opcode> = (..3).contains(&op).then(|| unsafe { std::mem::transmute(op) });
   |                                                 ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:52:69
   |
LL |     let _: Option<Opcode> = (..=3).contains(&op).then_some(unsafe { std::mem::transmute(op) });
   |                                                                     ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     let _: Option<Opcode> = (..=3).contains(&op).then(|| unsafe { std::mem::transmute(op) });
   |                                                  ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:61:24
   |
LL |     (op < 4).then_some(std::mem::transmute::<_, Opcode>(op));
   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     (op < 4).then(|| std::mem::transmute::<_, Opcode>(op));
   |              ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:90:60
   |
LL |     let _: Option<NonZeroU8> = (v1 > 0).then_some(unsafe { std::mem::transmute(v1) });
   |                                                            ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     let _: Option<NonZeroU8> = (v1 > 0).then(|| unsafe { std::mem::transmute(v1) });
   |                                         ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:96:86
   |
LL |     let _: Option<NonMaxU8> = (v2 < NonZeroU8::new(255).unwrap()).then_some(unsafe { std::mem::transmute(v2) });
   |                                                                                      ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     let _: Option<NonMaxU8> = (v2 < NonZeroU8::new(255).unwrap()).then(|| unsafe { std::mem::transmute(v2) });
   |                                                                   ~~~~ ++

error: this transmute is always evaluated eagerly, even if the condition is false
  --> $DIR/eager_transmute.rs:102:93
   |
LL |     let _: Option<NonZeroNonMaxU8> = (v2 < NonZeroU8::new(255).unwrap()).then_some(unsafe { std::mem::transmute(v2) });
   |                                                                                             ^^^^^^^^^^^^^^^^^^^^^^^
   |
help: consider using `bool::then` to only transmute if the condition holds
   |
LL |     let _: Option<NonZeroNonMaxU8> = (v2 < NonZeroU8::new(255).unwrap()).then(|| unsafe { std::mem::transmute(v2) });
   |                                                                          ~~~~ ++

error: aborting due to 17 previous errors