error[E0308]: mismatched types
  --> $DIR/mismatch-ty-unwrap-expect.rs:10:18
   |
LL |     let v: i32 = b;
   |            ---   ^ expected `i32`, found `Result<i32, ()>`
   |            |
   |            expected due to this
   |
   = note: expected type `i32`
              found enum `Result<i32, ()>`
help: use the `?` operator to extract the `Result<i32, ()>` value, propagating a `Result::Err` value to the caller
   |
LL |     let v: i32 = b?;
   |                   +

error[E0308]: mismatched types
  --> $DIR/mismatch-ty-unwrap-expect.rs:16:18
   |
LL |     let v: i32 = b;
   |            ---   ^ expected `i32`, found `Option<{integer}>`
   |            |
   |            expected due to this
   |
   = note: expected type `i32`
              found enum `Option<{integer}>`
help: use the `?` operator to extract the `Option<{integer}>` value, propagating an `Option::None` value to the caller
   |
LL |     let v: i32 = b?;
   |                   +

error[E0308]: mismatched types
  --> $DIR/mismatch-ty-unwrap-expect.rs:22:18
   |
LL |     let v: i32 = a;
   |            ---   ^ expected `i32`, found `Option<{integer}>`
   |            |
   |            expected due to this
   |
   = note: expected type `i32`
              found enum `Option<{integer}>`
help: consider using `Option::expect` to unwrap the `Option<{integer}>` value, panicking if the value is an `Option::None`
   |
LL |     let v: i32 = a.expect("REASON");
   |                   +++++++++++++++++

error[E0308]: mismatched types
  --> $DIR/mismatch-ty-unwrap-expect.rs:25:18
   |
LL |     let v: i32 = b;
   |            ---   ^ expected `i32`, found `Result<i32, ()>`
   |            |
   |            expected due to this
   |
   = note: expected type `i32`
              found enum `Result<i32, ()>`
help: consider using `Result::expect` to unwrap the `Result<i32, ()>` value, panicking if the value is a `Result::Err`
   |
LL |     let v: i32 = b.expect("REASON");
   |                   +++++++++++++++++

error[E0308]: mismatched types
  --> $DIR/mismatch-ty-unwrap-expect.rs:27:18
   |
LL |     let v: i32 = func();
   |            ---   ^^^^^^ expected `i32`, found `Option<i32>`
   |            |
   |            expected due to this
   |
   = note: expected type `i32`
              found enum `Option<i32>`
help: consider using `Option::expect` to unwrap the `Option<i32>` value, panicking if the value is an `Option::None`
   |
LL |     let v: i32 = func().expect("REASON");
   |                        +++++++++++++++++

error[E0308]: mismatched types
  --> $DIR/mismatch-ty-unwrap-expect.rs:30:18
   |
LL |     let v: i32 = a;
   |            ---   ^ expected `i32`, found `Option<_>`
   |            |
   |            expected due to this
   |
   = note: expected type `i32`
              found enum `Option<_>`
help: consider using `Option::expect` to unwrap the `Option<_>` value, panicking if the value is an `Option::None`
   |
LL |     let v: i32 = a.expect("REASON");
   |                   +++++++++++++++++

error: aborting due to 6 previous errors

For more information about this error, try `rustc --explain E0308`.