<complex>: avoid unnecessary conversion of real arguments to complex (#2855)

Co-authored-by: Stephan T. Lavavej <[email protected]>

Author: MattStephanson

stl/inc/complex

@@ -1402,14 +1402,14 @@ _NODISCARD _CONSTEXPR20 complex<_Ty> operator+(const complex<_Ty>& _Left, const
 template <class _Ty>
 _NODISCARD _CONSTEXPR20 complex<_Ty> operator+(const complex<_Ty>& _Left, const _Ty& _Right) {
     complex<_Ty> _Tmp(_Left);
-    _Tmp.real(_Tmp.real() + _Right);
+    _Tmp += _Right;
     return _Tmp;
 }
 
 template <class _Ty>
 _NODISCARD _CONSTEXPR20 complex<_Ty> operator+(const _Ty& _Left, const complex<_Ty>& _Right) {
-    complex<_Ty> _Tmp(_Left);
-    _Tmp += _Right;
+    complex<_Ty> _Tmp(_Right);
+    _Tmp += _Left;
     return _Tmp;
 }
 
@@ -1423,7 +1423,7 @@ _NODISCARD _CONSTEXPR20 complex<_Ty> operator-(const complex<_Ty>& _Left, const
 template <class _Ty>
 _NODISCARD _CONSTEXPR20 complex<_Ty> operator-(const complex<_Ty>& _Left, const _Ty& _Right) {
     complex<_Ty> _Tmp(_Left);
-    _Tmp.real(_Tmp.real() - _Right);
+    _Tmp -= _Right;
     return _Tmp;
 }
 
@@ -1444,15 +1444,14 @@ _NODISCARD _CONSTEXPR20 complex<_Ty> operator*(const complex<_Ty>& _Left, const
 template <class _Ty>
 _NODISCARD _CONSTEXPR20 complex<_Ty> operator*(const complex<_Ty>& _Left, const _Ty& _Right) {
     complex<_Ty> _Tmp(_Left);
-    _Tmp.real(_Tmp.real() * _Right);
-    _Tmp.imag(_Tmp.imag() * _Right);
+    _Tmp *= _Right;
     return _Tmp;
 }
 
 template <class _Ty>
 _NODISCARD _CONSTEXPR20 complex<_Ty> operator*(const _Ty& _Left, const complex<_Ty>& _Right) {
-    complex<_Ty> _Tmp(_Left);
-    _Tmp *= _Right;
+    complex<_Ty> _Tmp(_Right);
+    _Tmp *= _Left;
     return _Tmp;
 }
 
@@ -1466,8 +1465,7 @@ _NODISCARD _CONSTEXPR20 complex<_Ty> operator/(const complex<_Ty>& _Left, const
 template <class _Ty>
 _NODISCARD _CONSTEXPR20 complex<_Ty> operator/(const complex<_Ty>& _Left, const _Ty& _Right) {
     complex<_Ty> _Tmp(_Left);
-    _Tmp.real(_Tmp.real() / _Right);
-    _Tmp.imag(_Tmp.imag() / _Right);
+    _Tmp /= _Right;
     return _Tmp;
 }