operator_equal_equal.hpp

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#ifndef STAN_MATH_PRIM_CORE_OPERATOR_EQUAL_EQUAL_HPP
#define STAN_MATH_PRIM_CORE_OPERATOR_EQUAL_EQUAL_HPP
 
#include <stan/math/prim/meta.hpp>
#include <complex>
 
namespace stan {
namespace math {
 
template <typename U, typename V,
          typename = require_any_autodiff_scalar_t<U, V>>
inline bool operator==(const std::complex<U>& x, const std::complex<V>& y) {
  return x.real() == y.real() && x.imag() == y.imag();
}
 
template <typename U, typename V,
          typename = require_any_autodiff_scalar_t<U, V>>
inline bool operator==(const std::complex<U>& x, const V& y) {
  return x.real() == y && x.imag() == 0;
}
 
template <typename U, typename V,
          typename = require_any_autodiff_scalar_t<U, V>>
inline bool operator==(const U& x, const std::complex<V>& y) {
  return x == y.real() && 0 == y.imag();
}
 
}  // namespace math
}  // namespace stan
#endif