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https://github.com/rust-lang/rust
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6efddac288
Expand the primary span of E0277 when the immediate unmet bound is not what the user wrote:
```
error[E0277]: the trait bound `i32: Bar` is not satisfied
--> f100.rs:6:6
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6 | <i32 as Foo>::foo();
| ^^^ the trait `Bar` is not implemented for `i32`, which is required by `i32: Foo`
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help: this trait has no implementations, consider adding one
--> f100.rs:2:1
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2 | trait Bar {}
| ^^^^^^^^^
note: required for `i32` to implement `Foo`
--> f100.rs:3:14
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3 | impl<T: Bar> Foo for T {}
| --- ^^^ ^
| |
| unsatisfied trait bound introduced here
```
Fix #40120.
58 lines
2.7 KiB
Plaintext
58 lines
2.7 KiB
Plaintext
error[E0277]: the type `str` cannot be indexed by `{integer}`
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--> $DIR/str-idx.rs:3:19
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LL | let _: u8 = s[4];
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| ^ string indices are ranges of `usize`
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= help: the trait `SliceIndex<str>` is not implemented for `{integer}`, which is required by `str: Index<_>`
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= note: you can use `.chars().nth()` or `.bytes().nth()`
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for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
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= help: the trait `SliceIndex<[_]>` is implemented for `usize`
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= help: for that trait implementation, expected `[_]`, found `str`
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= note: required for `str` to implement `Index<{integer}>`
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error[E0277]: the type `str` cannot be indexed by `{integer}`
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--> $DIR/str-idx.rs:4:19
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LL | let _ = s.get(4);
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| --- ^ string indices are ranges of `usize`
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| required by a bound introduced by this call
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= help: the trait `SliceIndex<str>` is not implemented for `{integer}`
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= note: you can use `.chars().nth()` or `.bytes().nth()`
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for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
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= help: the trait `SliceIndex<[_]>` is implemented for `usize`
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= help: for that trait implementation, expected `[_]`, found `str`
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note: required by a bound in `core::str::<impl str>::get`
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--> $SRC_DIR/core/src/str/mod.rs:LL:COL
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error[E0277]: the type `str` cannot be indexed by `{integer}`
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--> $DIR/str-idx.rs:5:29
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LL | let _ = s.get_unchecked(4);
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| ------------- ^ string indices are ranges of `usize`
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| required by a bound introduced by this call
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= help: the trait `SliceIndex<str>` is not implemented for `{integer}`
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= note: you can use `.chars().nth()` or `.bytes().nth()`
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for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
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= help: the trait `SliceIndex<[_]>` is implemented for `usize`
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= help: for that trait implementation, expected `[_]`, found `str`
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note: required by a bound in `core::str::<impl str>::get_unchecked`
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--> $SRC_DIR/core/src/str/mod.rs:LL:COL
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error[E0277]: the type `str` cannot be indexed by `char`
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--> $DIR/str-idx.rs:6:19
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LL | let _: u8 = s['c'];
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| ^^^ string indices are ranges of `usize`
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= help: the trait `SliceIndex<str>` is not implemented for `char`, which is required by `str: Index<_>`
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= note: required for `str` to implement `Index<char>`
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error: aborting due to 4 previous errors
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For more information about this error, try `rustc --explain E0277`.
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