diff options
Diffstat (limited to 'tests/ui/mismatched_types/suggest-option-asderef.stderr')
| -rw-r--r-- | tests/ui/mismatched_types/suggest-option-asderef.stderr | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/tests/ui/mismatched_types/suggest-option-asderef.stderr b/tests/ui/mismatched_types/suggest-option-asderef.stderr new file mode 100644 index 000000000..01341603d --- /dev/null +++ b/tests/ui/mismatched_types/suggest-option-asderef.stderr @@ -0,0 +1,88 @@ +error[E0631]: type mismatch in function arguments + --> $DIR/suggest-option-asderef.rs:25:52 + | +LL | fn takes_str(_: &str) -> Option<()> { + | ----------------------------------- found signature defined here +... +LL | let _: Option<()> = produces_string().and_then(takes_str); + | -------- ^^^^^^^^^ expected due to this + | | + | required by a bound introduced by this call + | + = note: expected function signature `fn(String) -> _` + found function signature `for<'a> fn(&'a str) -> _` +note: required by a bound in `Option::<T>::and_then` + --> $SRC_DIR/core/src/option.rs:LL:COL +help: call `Option::as_deref()` first + | +LL | let _: Option<()> = produces_string().as_deref().and_then(takes_str); + | +++++++++++ + +error[E0631]: type mismatch in function arguments + --> $DIR/suggest-option-asderef.rs:28:55 + | +LL | fn takes_str(_: &str) -> Option<()> { + | ----------------------------------- found signature defined here +... +LL | let _: Option<Option<()>> = produces_string().map(takes_str); + | --- ^^^^^^^^^ expected due to this + | | + | required by a bound introduced by this call + | + = note: expected function signature `fn(String) -> _` + found function signature `for<'a> fn(&'a str) -> _` +note: required by a bound in `Option::<T>::map` + --> $SRC_DIR/core/src/option.rs:LL:COL +help: call `Option::as_deref()` first + | +LL | let _: Option<Option<()>> = produces_string().as_deref().map(takes_str); + | +++++++++++ + +error[E0631]: type mismatch in function arguments + --> $DIR/suggest-option-asderef.rs:31:55 + | +LL | fn takes_str_mut(_: &mut str) -> Option<()> { + | ------------------------------------------- found signature defined here +... +LL | let _: Option<Option<()>> = produces_string().map(takes_str_mut); + | --- ^^^^^^^^^^^^^ expected due to this + | | + | required by a bound introduced by this call + | + = note: expected function signature `fn(String) -> _` + found function signature `for<'a> fn(&'a mut str) -> _` +note: required by a bound in `Option::<T>::map` + --> $SRC_DIR/core/src/option.rs:LL:COL +help: call `Option::as_deref_mut()` first + | +LL | let _: Option<Option<()>> = produces_string().as_deref_mut().map(takes_str_mut); + | +++++++++++++++ + +error[E0631]: type mismatch in function arguments + --> $DIR/suggest-option-asderef.rs:36:40 + | +LL | fn generic_ref<T>(_: &T) -> Option<()> { + | -------------------------------------- found signature defined here +... +LL | let _ = produces_string().and_then(generic_ref); + | -------- ^^^^^^^^^^^ expected due to this + | | + | required by a bound introduced by this call + | + = note: expected function signature `fn(String) -> _` + found function signature `for<'a> fn(&'a _) -> _` +note: required by a bound in `Option::<T>::and_then` + --> $SRC_DIR/core/src/option.rs:LL:COL +help: do not borrow the argument + | +LL - fn generic_ref<T>(_: &T) -> Option<()> { +LL + fn generic_ref<T>(_: T) -> Option<()> { + | +help: call `Option::as_deref()` first + | +LL | let _ = produces_string().as_deref().and_then(generic_ref); + | +++++++++++ + +error: aborting due to 4 previous errors + +For more information about this error, try `rustc --explain E0631`. |