Combines an Index (which defaults to kImplicit) with a bool indicating whether the value is a hard constraint as opposed to a default value.

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

Constructors¶

explicit MaybeHardConstraintIndex(Index value = kImplicit,
                                  bool hard_constraint = true);

Constructs from a value.

Conversion operators¶

constexpr operator Index() const;

Implicitly converts to the Index value.

Methods¶

bool valid() const;

Checks if the constraint is specified, i.e. value != kImplicit.

Friend functions¶

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

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

Compares two constraints for equality.

Data members¶

Index value;

Index value.

bool hard_constraint;

Indicates whether value should be treated as a hard constraint.