easylocal::cost::hierarchical
A hierarchical cost: the hard cost has strict priority, the soft cost is compared only when the hard costs are equivalent (neither is less).
Synopsis
Declared in <easylocal/cost/hierarchical.hpp>
template<
class HardCost,
class SoftCost>
class hierarchical;Description
Each branch may itself be scalar or structured. Its delta never accepts a hard degradation: minus infinity when the hard cost improves, plus infinity when it worsens, the soft delta otherwise.
Type Aliases
| Name | Description |
|---|---|
hard_cost_type | The type of the hard cost. |
soft_cost_type | The type of the soft cost. |
Member Functions
| Name | Description |
|---|---|
hierarchical [constructor] | From its hard and soft costs. |
hard | The hard cost. |
soft | The soft cost. |
Friends
| Name | Description |
|---|---|
easylocal::cost::operator- | delta(candidate, current), when the soft cost has a delta. |
easylocal::cost::operator== | Whether the hard and the soft costs are equal. |
easylocal::cost::operator<=> | The order of the costs: by the hard costs, then by the soft costs; each branch compares with its <=>, or else with its <. |
Non-Member Functions
| Name | Description |
|---|---|
delta | Hard-preserving numeric delta: minus infinity when the hard cost improves, infinity when it worsens, the soft delta otherwise. |