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a3cf3822d2
When the return type of a function call depends on the type of an
argument, e.g.
```
fn foo<T>(x: T) -> T {
x
}
```
and the expected type is set due to either an explicitly typed
binding, or because the call to the function is in a tail position
without semicolon, the current error implies that the argument in the
call has the wrong type.
This new hint highlights that the expected type doesn't match the
returned type, which matches the argument type, and that that's why
we're flagging the argument type.
Fixes #43608.
108 lines
4.0 KiB
Plaintext
108 lines
4.0 KiB
Plaintext
error[E0061]: this enum variant takes 1 argument but 2 arguments were supplied
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--> $DIR/args-instead-of-tuple-errors.rs:6:34
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LL | let _: Option<(i32, bool)> = Some(1, 2);
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| ^^^^ - argument of type `{integer}` unexpected
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note: expected tuple, found integer
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--> $DIR/args-instead-of-tuple-errors.rs:6:39
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LL | let _: Option<(i32, bool)> = Some(1, 2);
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| ^
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= note: expected tuple `(i32, bool)`
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found type `{integer}`
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help: the type constructed contains `{integer}` due to the type of the argument passed
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--> $DIR/args-instead-of-tuple-errors.rs:6:34
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LL | let _: Option<(i32, bool)> = Some(1, 2);
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| ^^^^^-^^^^
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| |
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| this argument influences the type of `Some`
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note: tuple variant defined here
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--> $SRC_DIR/core/src/option.rs:LL:COL
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help: remove the extra argument
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LL | let _: Option<(i32, bool)> = Some(/* (i32, bool) */);
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| ~~~~~~~~~~~~~~~~~~~
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error[E0061]: this function takes 1 argument but 2 arguments were supplied
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--> $DIR/args-instead-of-tuple-errors.rs:8:5
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LL | int_bool(1, 2);
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| ^^^^^^^^ - argument of type `{integer}` unexpected
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note: expected tuple, found integer
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--> $DIR/args-instead-of-tuple-errors.rs:8:14
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LL | int_bool(1, 2);
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| ^
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= note: expected tuple `(i32, bool)`
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found type `{integer}`
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note: function defined here
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--> $DIR/args-instead-of-tuple-errors.rs:21:4
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LL | fn int_bool(_: (i32, bool)) {
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| ^^^^^^^^ --------------
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help: remove the extra argument
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LL | int_bool(/* (i32, bool) */);
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| ~~~~~~~~~~~~~~~~~~~
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error[E0061]: this enum variant takes 1 argument but 0 arguments were supplied
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--> $DIR/args-instead-of-tuple-errors.rs:11:28
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LL | let _: Option<(i8,)> = Some();
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| ^^^^-- an argument of type `(i8,)` is missing
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note: tuple variant defined here
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--> $SRC_DIR/core/src/option.rs:LL:COL
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help: provide the argument
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LL | let _: Option<(i8,)> = Some(/* (i8,) */);
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| ~~~~~~~~~~~~~
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error[E0308]: mismatched types
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--> $DIR/args-instead-of-tuple-errors.rs:14:34
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LL | let _: Option<(i32,)> = Some(5_usize);
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| ---- ^^^^^^^ expected tuple, found `usize`
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| |
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| arguments to this enum variant are incorrect
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= note: expected tuple `(i32,)`
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found type `usize`
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help: the type constructed contains `usize` due to the type of the argument passed
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--> $DIR/args-instead-of-tuple-errors.rs:14:29
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LL | let _: Option<(i32,)> = Some(5_usize);
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| ^^^^^-------^
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| |
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| this argument influences the type of `Some`
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note: tuple variant defined here
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--> $SRC_DIR/core/src/option.rs:LL:COL
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error[E0308]: mismatched types
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--> $DIR/args-instead-of-tuple-errors.rs:17:34
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LL | let _: Option<(i32,)> = Some((5_usize));
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| ---- ^^^^^^^^^ expected tuple, found `usize`
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| |
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| arguments to this enum variant are incorrect
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= note: expected tuple `(i32,)`
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found type `usize`
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help: the type constructed contains `usize` due to the type of the argument passed
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--> $DIR/args-instead-of-tuple-errors.rs:17:29
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LL | let _: Option<(i32,)> = Some((5_usize));
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| ^^^^^---------^
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| |
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| this argument influences the type of `Some`
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note: tuple variant defined here
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--> $SRC_DIR/core/src/option.rs:LL:COL
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error: aborting due to 5 previous errors
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Some errors have detailed explanations: E0061, E0308.
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For more information about an error, try `rustc --explain E0061`.
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