Trait miri::Value

pub trait Value<'mir, 'tcx, M>: Sizedwhere
    M: Machine<'mir, 'tcx>,{
    fn layout(&self) -> TyAndLayout<'tcx, Ty<'tcx>>;
    fn to_op_for_read(
        &self,
        ecx: &InterpCx<'mir, 'tcx, M>
    ) -> Result<OpTy<'tcx, <M as Machine<'mir, 'tcx>>::Provenance>, InterpErrorInfo<'tcx>>;
    fn from_op(op: &OpTy<'tcx, <M as Machine<'mir, 'tcx>>::Provenance>) -> Self;
    fn project_downcast(
        &self,
        ecx: &InterpCx<'mir, 'tcx, M>,
        variant: VariantIdx
    ) -> Result<Self, InterpErrorInfo<'tcx>>;
    fn project_field(
        &self,
        ecx: &InterpCx<'mir, 'tcx, M>,
        field: usize
    ) -> Result<Self, InterpErrorInfo<'tcx>>;

    fn to_op_for_proj(
        &self,
        ecx: &InterpCx<'mir, 'tcx, M>
    ) -> Result<OpTy<'tcx, <M as Machine<'mir, 'tcx>>::Provenance>, InterpErrorInfo<'tcx>> { ... }
}

A thing that we can project into, and that has a layout. This wouldn’t have to depend on Machine but with the current type inference, that’s just more convenient to work with (avoids repeating all the Machine bounds).

Required Methods

fn layout(&self) -> TyAndLayout<'tcx, Ty<'tcx>>

Gets this value’s layout.

fn to_op_for_read(
    &self,
    ecx: &InterpCx<'mir, 'tcx, M>
) -> Result<OpTy<'tcx, <M as Machine<'mir, 'tcx>>::Provenance>, InterpErrorInfo<'tcx>>

Makes this into an OpTy, in a cheap way that is good for reading.

fn from_op(op: &OpTy<'tcx, <M as Machine<'mir, 'tcx>>::Provenance>) -> Self

Creates this from an OpTy.

If to_op_for_proj only ever produces Indirect operands, then this one is definitely Indirect.

fn project_downcast(
    &self,
    ecx: &InterpCx<'mir, 'tcx, M>,
    variant: VariantIdx
) -> Result<Self, InterpErrorInfo<'tcx>>

Projects to the given enum variant.

fn project_field(
    &self,
    ecx: &InterpCx<'mir, 'tcx, M>,
    field: usize
) -> Result<Self, InterpErrorInfo<'tcx>>

Projects to the n-th field.

Provided Methods

fn to_op_for_proj(
    &self,
    ecx: &InterpCx<'mir, 'tcx, M>
) -> Result<OpTy<'tcx, <M as Machine<'mir, 'tcx>>::Provenance>, InterpErrorInfo<'tcx>>

Makes this into an OpTy, in a potentially more expensive way that is good for projections.

Implementors