Combines a span (with length assumed to be a valid rank) with a bit vector indicating which values are hard constraints as opposed to soft constraints.

This type serves as a base class for option types like ChunkLayout::GridOrigin.

Constructors¶

explicit MaybeHardConstraintSpan();

Constructs a zero-length span with no hard constraints.

explicit MaybeHardConstraintSpan(
    span<const T> s,
    DimensionSet hard_constraint = DimensionSet(true));

explicit MaybeHardConstraintSpan(
    const T (&s)[N],
    DimensionSet hard_constraint = DimensionSet(true));

Constructs from a vector and hard constraint dimension set.

Methods¶

constexpr bool valid() const;

Checks if the span has non-zero length.

Friend functions¶

friend bool operator==(const MaybeHardConstraintSpan& a,
                       const MaybeHardConstraintSpan& b);

friend bool operator!=(const MaybeHardConstraintSpan& a,
                       const MaybeHardConstraintSpan& b);

Compares two constraints for equality.

Data members¶

DimensionSet hard_constraint;

Set of dimensions for which the corresponding constraint value should be treated as a hard constraint.