38template<
typename T,
typename V>
57 virtual bool exist(
const T& block,
const V&
id)
const = 0;
Abstract interface for reading parameters and basic metadata.
virtual double get_scale(const T &block) const =0
Returns the scale associated to a block.
virtual scalar_t operator()(const T &x, const V &y) const =0
Retrieves the scalar value for (block, id).
virtual bool exist(const T &block, const V &id) const =0
Checks if a parameter exists for (block, id).
double T(double x)
Wilson coefficient T(x).