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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="28px"><tspan class="fg-ansi256-009 bold">error[E0277]</tspan><tspan class="bold">: the trait bound `Struct: Foo&lt;i32&gt;` is not satisfied</tspan>
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<tspan x="10px" y="46px"><tspan> </tspan><tspan class="fg-ansi256-012 bold">--&gt; </tspan><tspan>$DIR/highlight-difference-between-expected-trait-and-found-trait.rs:16:13</tspan>
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<tspan x="10px" y="64px"><tspan> </tspan><tspan class="fg-ansi256-012 bold">|</tspan>
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<tspan x="10px" y="82px"><tspan class="fg-ansi256-012 bold">LL</tspan><tspan> </tspan><tspan class="fg-ansi256-012 bold">|</tspan><tspan> fn foo() -&gt; impl Foo&lt;i32&gt; {</tspan>
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Remove detail from label/note that is already available in other note Remove the "which is required by `{root_obligation}`" post-script in "the trait `X` is not implemented for `Y`" explanation in E0277. This information is already conveyed in the notes explaining requirements, making it redundant while making the text (particularly in labels) harder to read. ``` error[E0277]: the trait bound `NotCopy: Copy` is not satisfied --> $DIR/wf-static-type.rs:10:13 | LL | static FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None }; | ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `NotCopy` | = note: required for `Option<NotCopy>` to implement `Copy` note: required by a bound in `IsCopy` --> $DIR/wf-static-type.rs:7:17 | LL | struct IsCopy<T:Copy> { t: T } | ^^^^ required by this bound in `IsCopy` ``` vs the prior ``` error[E0277]: the trait bound `NotCopy: Copy` is not satisfied --> $DIR/wf-static-type.rs:10:13 | LL | static FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None }; | ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `NotCopy`, which is required by `Option<NotCopy>: Copy` | = note: required for `Option<NotCopy>` to implement `Copy` note: required by a bound in `IsCopy` --> $DIR/wf-static-type.rs:7:17 | LL | struct IsCopy<T:Copy> { t: T } | ^^^^ required by this bound in `IsCopy` ```
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<tspan x="10px" y="100px"><tspan> </tspan><tspan class="fg-ansi256-012 bold">|</tspan><tspan> </tspan><tspan class="fg-ansi256-009 bold">^^^^^^^^^^^^^</tspan><tspan> </tspan><tspan class="fg-ansi256-009 bold">the trait `Bar&lt;i32&gt;` is not implemented for `Struct`</tspan>
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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="118px"><tspan class="fg-ansi256-012 bold">LL</tspan><tspan> </tspan><tspan class="fg-ansi256-012 bold">|</tspan><tspan> Struct</tspan>
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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="136px"><tspan> </tspan><tspan class="fg-ansi256-012 bold">|</tspan><tspan> </tspan><tspan class="fg-ansi256-012 bold">------</tspan><tspan> </tspan><tspan class="fg-ansi256-012 bold">return type was inferred to be `Struct` here</tspan>
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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="154px"><tspan> </tspan><tspan class="fg-ansi256-012 bold">|</tspan>
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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="172px"><tspan> </tspan><tspan class="fg-ansi256-012 bold">= </tspan><tspan class="bold">help</tspan><tspan>: the trait `Bar&lt;</tspan><tspan class="fg-magenta bold">i32</tspan><tspan>&gt;` </tspan><tspan class="fg-magenta bold">is not</tspan><tspan> implemented for `Struct`</tspan>
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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="190px"><tspan> but trait `Bar&lt;</tspan><tspan class="fg-magenta bold">()</tspan><tspan>&gt;` </tspan><tspan class="fg-magenta bold">is</tspan><tspan> implemented for it</tspan>
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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="208px"><tspan> </tspan><tspan class="fg-ansi256-012 bold">= </tspan><tspan class="bold">help</tspan><tspan>: for that trait implementation, expected `</tspan><tspan class="fg-magenta bold">()</tspan><tspan>`, found `</tspan><tspan class="fg-magenta bold">i32</tspan><tspan>`</tspan>
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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="226px"><tspan class="fg-ansi256-010 bold">note</tspan><tspan>: required for `Struct` to implement `Foo&lt;i32&gt;`</tspan>
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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="244px"><tspan> </tspan><tspan class="fg-ansi256-012 bold">--&gt; </tspan><tspan>$DIR/highlight-difference-between-expected-trait-and-found-trait.rs:11:12</tspan>
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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="262px"><tspan> </tspan><tspan class="fg-ansi256-012 bold">|</tspan>
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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="280px"><tspan class="fg-ansi256-012 bold">LL</tspan><tspan> </tspan><tspan class="fg-ansi256-012 bold">|</tspan><tspan> impl&lt;T, K&gt; Foo&lt;K&gt; for T where T: Bar&lt;K&gt;</tspan>
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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="298px"><tspan> </tspan><tspan class="fg-ansi256-012 bold">|</tspan><tspan> </tspan><tspan class="fg-ansi256-010 bold">^^^^^^</tspan><tspan> </tspan><tspan class="fg-ansi256-010 bold">^</tspan><tspan> </tspan><tspan class="fg-ansi256-012 bold">------</tspan><tspan> </tspan><tspan class="fg-ansi256-012 bold">unsatisfied trait bound introduced here</tspan>
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Add trait diff highlighting logic and use it in E0277 When a trait is not implemented for a type, but there *is* an `impl` for another type or different trait params, we format the output to use highlighting in the same way that E0308 does for types. The logic accounts for 3 cases: - When both the type and trait in the expected predicate and the candidate are different - When only the types are different - When only the trait generic params are different For each case, we use slightly different formatting and wording.
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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="334px"><tspan class="fg-ansi256-009 bold">error</tspan><tspan class="bold">: aborting due to 1 previous error</tspan>
Add trait diff highlighting logic and use it in E0277 When a trait is not implemented for a type, but there *is* an `impl` for another type or different trait params, we format the output to use highlighting in the same way that E0308 does for types. The logic accounts for 3 cases: - When both the type and trait in the expected predicate and the candidate are different - When only the types are different - When only the trait generic params are different For each case, we use slightly different formatting and wording.
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Point at tail expression on rpit E0277 ``` error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied --> $DIR/gen_block_is_coro.rs:6:13 | LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` LL | gen { yield 42 } | ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here ``` The secondary span label is new.
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<tspan x="10px" y="370px"><tspan class="bold">For more information about this error, try `rustc --explain E0277`.</tspan>
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