Enum rustc::traits::ObligationCauseCode[][src]

pub enum ObligationCauseCode<'tcx> {
    MiscObligation,
    SliceOrArrayElem,
    TupleElem,
    ProjectionWf(ProjectionTy<'tcx>),
    ItemObligation(DefId),
    ReferenceOutlivesReferent(Ty<'tcx>),
    ObjectTypeBound(Ty<'tcx>, Region<'tcx>),
    ObjectCastObligation(Ty<'tcx>),
    AssignmentLhsSized,
    TupleInitializerSized,
    StructInitializerSized,
    VariableType(NodeId),
    SizedReturnType,
    SizedYieldType,
    RepeatVec,
    FieldSized(AdtKind),
    ConstSized,
    SharedStatic,
    BuiltinDerivedObligation(DerivedObligationCause<'tcx>),
    ImplDerivedObligation(DerivedObligationCause<'tcx>),
    CompareImplMethodObligation {
        item_name: Name,
        impl_item_def_id: DefId,
        trait_item_def_id: DefId,
    },
    ExprAssignable,
    MatchExpressionArm {
        arm_span: Span,
        source: MatchSource,
    },
    IfExpression,
    IfExpressionWithNoElse,
    MainFunctionType,
    StartFunctionType,
    IntrinsicType,
    MethodReceiver,
    ReturnNoExpression,
    ReturnType(NodeId),
    BlockTailExpression(NodeId),
    TrivialBound,
}
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Variants

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Not well classified or should be obvious from span.

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A slice or array is WF only if T: Sized

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A tuple is WF only if its middle elements are Sized

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This is the trait reference from the given projection

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In an impl of trait X for type Y, type Y must also implement all supertraits of X.

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A type like &'a T is WF only if T: 'a.

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A type like Box<Foo<'a> + 'b> is WF only if 'b: 'a.

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Obligation incurred due to an object cast.

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L = X implies that L is Sized

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(x1, .., xn) must be Sized

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S { ... } must be Sized

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Type of each variable must be Sized

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Return type must be Sized

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Yield type must be Sized

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[T,..n] --> T must be Copy

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Types of fields (other than the last) in a struct must be sized.

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Constant expressions must be sized.

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static items must have Sync type

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error derived when matching traits/impls; see ObligationCause for more details

Fields of CompareImplMethodObligation

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🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

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Checking that this expression can be assigned where it needs to be

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Computing common supertype in the arms of a match expression

Fields of MatchExpressionArm

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Computing common supertype in an if expression

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Computing common supertype of an if expression with no else counter-part

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main has wrong type

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start has wrong type

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intrinsic has wrong type

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method receiver

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return with no expression

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return with an expression

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Block implicit return

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#[feature(trivial_bounds)] is not enabled

Trait Implementations

impl<'a, 'tcx> Lift<'tcx> for ObligationCauseCode<'a>
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

impl<'tcx> Clone for ObligationCauseCode<'tcx>
[src]

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl<'tcx> Debug for ObligationCauseCode<'tcx>
[src]

Formats the value using the given formatter. Read more

impl<'tcx> PartialEq for ObligationCauseCode<'tcx>
[src]

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

impl<'tcx> Eq for ObligationCauseCode<'tcx>
[src]

impl<'tcx> Hash for ObligationCauseCode<'tcx>
[src]

Feeds this value into the given [Hasher]. Read more

Feeds a slice of this type into the given [Hasher]. Read more

Auto Trait Implementations

impl<'tcx> !Send for ObligationCauseCode<'tcx>

impl<'tcx> !Sync for ObligationCauseCode<'tcx>