ScalarTemperatureGradient.hpp

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// Copyright © 2020-2024 Alexandre Coderre-Chabot
//
// This file is part of Physical Quantities (PhQ), a C++ library of physical quantities, physical
// models, and units of measure for scientific computing.
//
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//     https://github.com/acodcha/phq
//
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//     https://mit-license.org
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#ifndef PHQ_SCALAR_TEMPERATURE_GRADIENT_HPP
#define PHQ_SCALAR_TEMPERATURE_GRADIENT_HPP
 
#include <cstddef>
#include <functional>
#include <ostream>
 
#include "DimensionalScalar.hpp"
#include "Length.hpp"
#include "TemperatureDifference.hpp"
#include "Unit/TemperatureGradient.hpp"
 
namespace PhQ {
 
// Forward declaration for class PhQ::ScalarTemperatureGradient.
template <typename NumericType>
class Direction;
 
// Forward declaration for class PhQ::ScalarTemperatureGradient.
template <typename NumericType>
class PlanarDirection;
 
// Forward declaration for class PhQ::ScalarTemperatureGradient.
template <typename NumericType>
class PlanarTemperatureGradient;
 
// Forward declaration for class PhQ::ScalarTemperatureGradient.
template <typename NumericType>
class TemperatureGradient;
 
/// \brief Scalar temperature gradient component or magnitude of a temperature gradient vector. For
/// a three-dimensional Euclidean temperature gradient vector, see PhQ::TemperatureGradient. For a
/// two-dimensional Euclidean temperature gradient vector in the XY plane, see
/// PhQ::PlanarTemperatureGradient.
template <typename NumericType = double>
class ScalarTemperatureGradient : public DimensionalScalar<Unit::TemperatureGradient, NumericType> {
public:
  /// \brief Default constructor. Constructs a scalar temperature gradient with an uninitialized
  /// value.
  ScalarTemperatureGradient() = default;
 
  /// \brief Constructor. Constructs a scalar temperature gradient with a given value expressed in a
  /// given temperature gradient unit.
  ScalarTemperatureGradient(const NumericType value, const Unit::TemperatureGradient unit)
    : DimensionalScalar<Unit::TemperatureGradient, NumericType>(value, unit) {}
 
  /// \brief Constructor. Constructs a scalar temperature gradient from a given temperature
  /// difference and length using the definition of temperature gradient.
  constexpr ScalarTemperatureGradient(
      const TemperatureDifference<NumericType>& temperature_difference,
      const Length<NumericType>& length)
    : ScalarTemperatureGradient<NumericType>(temperature_difference.Value() / length.Value()) {}
 
  /// \brief Destructor. Destroys this scalar temperature gradient.
  ~ScalarTemperatureGradient() noexcept = default;
 
  /// \brief Copy constructor. Constructs a scalar temperature gradient by copying another one.
  constexpr ScalarTemperatureGradient(
      const ScalarTemperatureGradient<NumericType>& other) = default;
 
  /// \brief Copy constructor. Constructs a scalar temperature gradient by copying another one.
  template <typename OtherNumericType>
  explicit constexpr ScalarTemperatureGradient(
      const ScalarTemperatureGradient<OtherNumericType>& other)
    : ScalarTemperatureGradient(static_cast<NumericType>(other.Value())) {}
 
  /// \brief Move constructor. Constructs a scalar temperature gradient by moving another one.
  constexpr ScalarTemperatureGradient(
      ScalarTemperatureGradient<NumericType>&& other) noexcept = default;
 
  /// \brief Copy assignment operator. Assigns this scalar temperature gradient by copying another
  /// one.
  constexpr ScalarTemperatureGradient<NumericType>& operator=(
      const ScalarTemperatureGradient<NumericType>& other) = default;
 
  /// \brief Copy assignment operator. Assigns this scalar temperature gradient by copying another
  /// one.
  template <typename OtherNumericType>
  constexpr ScalarTemperatureGradient<NumericType>& operator=(
      const ScalarTemperatureGradient<OtherNumericType>& other) {
    this->value = static_cast<NumericType>(other.Value());
    return *this;
  }
 
  /// \brief Move assignment operator. Assigns this scalar temperature gradient by moving another
  /// one.
  constexpr ScalarTemperatureGradient<NumericType>& operator=(
      ScalarTemperatureGradient<NumericType>&& other) noexcept = default;
 
  /// \brief Statically creates a scalar temperature gradient of zero.
  [[nodiscard]] static constexpr ScalarTemperatureGradient<NumericType> Zero() {
    return ScalarTemperatureGradient<NumericType>{static_cast<NumericType>(0)};
  }
 
  /// \brief Statically creates a scalar temperature gradient with a given value expressed in a
  /// given temperature gradient unit.
  template <Unit::TemperatureGradient Unit>
  [[nodiscard]] static constexpr ScalarTemperatureGradient<NumericType> Create(
      const NumericType value) {
    return ScalarTemperatureGradient<NumericType>{
      ConvertStatically<Unit::TemperatureGradient, Unit, Standard<Unit::TemperatureGradient>>(
          value)};
  }
 
  constexpr ScalarTemperatureGradient<NumericType> operator+(
      const ScalarTemperatureGradient<NumericType>& scalar_temperature_gradient) const {
    return ScalarTemperatureGradient<NumericType>{this->value + scalar_temperature_gradient.value};
  }
 
  constexpr ScalarTemperatureGradient<NumericType> operator-(
      const ScalarTemperatureGradient<NumericType>& scalar_temperature_gradient) const {
    return ScalarTemperatureGradient<NumericType>{this->value - scalar_temperature_gradient.value};
  }
 
  constexpr ScalarTemperatureGradient<NumericType> operator*(const NumericType number) const {
    return ScalarTemperatureGradient<NumericType>{this->value * number};
  }
 
  constexpr TemperatureDifference<NumericType> operator*(const Length<NumericType>& length) const {
    return TemperatureDifference<NumericType>{*this, length};
  }
 
  constexpr PlanarTemperatureGradient<NumericType> operator*(
      const PlanarDirection<NumericType>& planar_direction) const;
 
  constexpr TemperatureGradient<NumericType> operator*(
      const Direction<NumericType>& direction) const;
 
  constexpr ScalarTemperatureGradient<NumericType> operator/(const NumericType number) const {
    return ScalarTemperatureGradient<NumericType>{this->value / number};
  }
 
  constexpr NumericType operator/(
      const ScalarTemperatureGradient<NumericType>& scalar_temperature_gradient) const noexcept {
    return this->value / scalar_temperature_gradient.value;
  }
 
  constexpr void operator+=(
      const ScalarTemperatureGradient<NumericType>& scalar_temperature_gradient) noexcept {
    this->value += scalar_temperature_gradient.value;
  }
 
  constexpr void operator-=(
      const ScalarTemperatureGradient<NumericType>& scalar_temperature_gradient) noexcept {
    this->value -= scalar_temperature_gradient.value;
  }
 
  constexpr void operator*=(const NumericType number) noexcept {
    this->value *= number;
  }
 
  constexpr void operator/=(const NumericType number) noexcept {
    this->value /= number;
  }
 
private:
  /// \brief Constructor. Constructs a scalar temperature gradient with a given value expressed in
  /// the standard temperature gradient unit.
  explicit constexpr ScalarTemperatureGradient(const NumericType value)
    : DimensionalScalar<Unit::TemperatureGradient, NumericType>(value) {}
 
  template <typename OtherNumericType>
  friend class PlanarTemperatureGradient;
 
  template <typename OtherNumericType>
  friend class TemperatureGradient;
};
 
template <typename NumericType>
inline constexpr bool operator==(const ScalarTemperatureGradient<NumericType>& left,
                                 const ScalarTemperatureGradient<NumericType>& right) noexcept {
  return left.Value() == right.Value();
}
 
template <typename NumericType>
inline constexpr bool operator!=(const ScalarTemperatureGradient<NumericType>& left,
                                 const ScalarTemperatureGradient<NumericType>& right) noexcept {
  return left.Value() != right.Value();
}
 
template <typename NumericType>
inline constexpr bool operator<(const ScalarTemperatureGradient<NumericType>& left,
                                const ScalarTemperatureGradient<NumericType>& right) noexcept {
  return left.Value() < right.Value();
}
 
template <typename NumericType>
inline constexpr bool operator>(const ScalarTemperatureGradient<NumericType>& left,
                                const ScalarTemperatureGradient<NumericType>& right) noexcept {
  return left.Value() > right.Value();
}
 
template <typename NumericType>
inline constexpr bool operator<=(const ScalarTemperatureGradient<NumericType>& left,
                                 const ScalarTemperatureGradient<NumericType>& right) noexcept {
  return left.Value() <= right.Value();
}
 
template <typename NumericType>
inline constexpr bool operator>=(const ScalarTemperatureGradient<NumericType>& left,
                                 const ScalarTemperatureGradient<NumericType>& right) noexcept {
  return left.Value() >= right.Value();
}
 
template <typename NumericType>
inline std::ostream& operator<<(
    std::ostream& stream,
    const ScalarTemperatureGradient<NumericType>& scalar_temperature_gradient) {
  stream << scalar_temperature_gradient.Print();
  return stream;
}
 
template <typename NumericType>
inline constexpr ScalarTemperatureGradient<NumericType> operator*(
    const NumericType number,
    const ScalarTemperatureGradient<NumericType>& scalar_temperature_gradient) {
  return scalar_temperature_gradient * number;
}
 
template <typename NumericType>
inline constexpr TemperatureDifference<NumericType>::TemperatureDifference(
    const ScalarTemperatureGradient<NumericType>& scalar_temperature_gradient,
    const Length<NumericType>& length)
  : TemperatureDifference<NumericType>(scalar_temperature_gradient.Value() * length.Value()) {}
 
template <typename NumericType>
inline constexpr ScalarTemperatureGradient<NumericType> TemperatureDifference<NumericType>::
operator/(const Length<NumericType>& length) const {
  return ScalarTemperatureGradient<NumericType>{*this, length};
}
 
}  // namespace PhQ
 
namespace std {
 
template <typename NumericType>
struct hash<PhQ::ScalarTemperatureGradient<NumericType>> {
  inline size_t operator()(
      const PhQ::ScalarTemperatureGradient<NumericType>& scalar_temperature_gradient) const {
    return hash<NumericType>()(scalar_temperature_gradient.Value());
  }
};
 
}  // namespace std
 
#endif  // PHQ_SCALAR_TEMPERATURE_GRADIENT_HPP