Skip to content

[math] Support TComplex arithmetic operations with any possible type #13746

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
guitargeek merged 1 commit into from
Oct 2, 2023
Merged

[math] Support TComplex arithmetic operations with any possible type #13746

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
47 changes: 28 additions & 19 deletions math/mathcore/inc/TComplex.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,9 @@
#include "TMath.h"

#include "Rtypes.h"

#include <string>
#include <type_traits>


class TComplex {
Expand Down Expand Up @@ -74,25 +76,32 @@ class TComplex {
TComplex operator +()
{return *this;}

// Simple operators complex - double
TComplex operator *(Double_t c) const
{return TComplex(fRe*c,fIm*c);}
TComplex operator +(Double_t c) const
{return TComplex(fRe+c, fIm);}
TComplex operator /(Double_t c) const
{return TComplex(fRe/c,fIm/c);}
TComplex operator -(Double_t c) const
{return TComplex(fRe-c, fIm);}

// Simple operators double - complex
friend TComplex operator *(Double_t d, const TComplex & c)
{return TComplex(d*c.fRe,d*c.fIm);}
friend TComplex operator +(Double_t d, const TComplex & c)
{return TComplex(d+c.fRe, c.fIm);}
friend TComplex operator /(Double_t d, const TComplex & c)
{return TComplex(d*c.fRe,-d*c.fIm)/c.Rho2();}
friend TComplex operator -(Double_t d, const TComplex & c)
{return TComplex(d-c.fRe, -c.fIm);}
// Metafunction to figure out whether a type is arithmetic. This is used for
// the arithmetic operator implementation, so we can be sure that nothing
// unexpected will happen for non-arithmetic types that implement these
// operators with `double` themselves.
template<class T>
using enable_if_arithmetic = typename std::enable_if<std::is_arithmetic<T>::value, bool>::type;

// Simple operators complex - arithmetic
template <class T, enable_if_arithmetic<T> = true>
TComplex operator *(T c) const { return {fRe*c,fIm*c}; }
template <class T, enable_if_arithmetic<T> = true>
TComplex operator +(T c) const { return {fRe+c, fIm}; }
template <class T, enable_if_arithmetic<T> = true>
TComplex operator /(T c) const { return {fRe/c,fIm/c}; }
template <class T, enable_if_arithmetic<T> = true>
TComplex operator -(T c) const { return {fRe-c, fIm}; }

// Simple operators arithmetic - complex
template <class T, enable_if_arithmetic<T> = true>
friend TComplex operator *(T d, const TComplex & c) { return {d*c.fRe,d*c.fIm}; }
template <class T, enable_if_arithmetic<T> = true>
friend TComplex operator +(T d, const TComplex & c) { return {d+c.fRe, c.fIm}; }
template <class T, enable_if_arithmetic<T> = true>
friend TComplex operator /(T d, const TComplex & c) { return TComplex{d*c.fRe,-d*c.fIm} / c.Rho2(); }
template <class T, enable_if_arithmetic<T> = true>
friend TComplex operator -(T d, const TComplex & c) { return {d-c.fRe, -c.fIm}; }

// Convertors
operator Double_t () const {return fRe;}
Expand Down