rust/tests/ui/binop/binop-mul-i32-f32.rs

fn foo(x: i32, y: f32) -> f32 {
    x * y //~ ERROR cannot multiply `i32` by `f32`
}

fn main() {}
Improve wording of "cannot multiply" type error For example, if you had this code: fn foo(x: i32, y: f32) -> f32 { x * y } You would get this error: error[E0277]: cannot multiply `f32` to `i32` --> src/lib.rs:2:7 \| 2 \| x * y \| ^ no implementation for `i32 * f32` \| = help: the trait `Mul<f32>` is not implemented for `i32` However, that's not usually how people describe multiplication. People usually describe multiplication like how the division error words it: error[E0277]: cannot divide `i32` by `f32` --> src/lib.rs:2:7 \| 2 \| x / y \| ^ no implementation for `i32 / f32` \| = help: the trait `Div<f32>` is not implemented for `i32` So that's what this change does. It changes this: error[E0277]: cannot multiply `f32` to `i32` --> src/lib.rs:2:7 \| 2 \| x * y \| ^ no implementation for `i32 * f32` \| = help: the trait `Mul<f32>` is not implemented for `i32` To this: error[E0277]: cannot multiply `i32` by `f32` --> src/lib.rs:2:7 \| 2 \| x * y \| ^ no implementation for `i32 * f32` \| = help: the trait `Mul<f32>` is not implemented for `i32` 2020-10-18 02:59:51 +00:00			`fn foo(x: i32, y: f32) -> f32 {`
			x * y //~ ERROR cannot multiply `i32` by `f32`
			`}`

			`fn main() {}`