Trait IntegerExt

Source

pub trait IntegerExt {
    // Required methods
    fn to_ty<'tcx>(&self, tcx: TyCtxt<'tcx>, signed: bool) -> Ty<'tcx>;
    fn from_int_ty<C: HasDataLayout>(cx: &C, ity: IntTy) -> Integer;
    fn from_uint_ty<C: HasDataLayout>(cx: &C, ity: UintTy) -> Integer;
    fn discr_range_of_repr<'tcx>(
        tcx: TyCtxt<'tcx>,
        ty: Ty<'tcx>,
        repr: &ReprOptions,
        min: i128,
        max: i128,
    ) -> (Integer, bool);
}

Required Methods§

Source

fn discr_range_of_repr<'tcx>( tcx: TyCtxt<'tcx>, ty: Ty<'tcx>, repr: &ReprOptions, min: i128, max: i128, ) -> (Integer, bool)

Finds the appropriate Integer type and signedness for the given signed discriminant range and #[repr] attribute. N.B.: u128 values above i128::MAX will be treated as signed, but that shouldn’t affect anything, other than maybe debuginfo.

This is the basis for computing the type of the tag of an enum (which can be smaller than the type of the discriminant, which is determined by ReprOptions::discr_type).

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types§

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impl IntegerExt for Integer

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fn discr_range_of_repr<'tcx>( tcx: TyCtxt<'tcx>, ty: Ty<'tcx>, repr: &ReprOptions, min: i128, max: i128, ) -> (Integer, bool)

Finds the appropriate Integer type and signedness for the given signed discriminant range and #[repr] attribute. N.B.: u128 values above i128::MAX will be treated as signed, but that shouldn’t affect anything, other than maybe debuginfo.

This is the basis for computing the type of the tag of an enum (which can be smaller than the type of the discriminant, which is determined by ReprOptions::discr_type).

Source §