MinusFunctionOptimizations

Functions
template<class F >
static auto	Dune::ACFem::operator- (const UnaryGridFunctionExpression< MinusOperation, F > &expr) -> decltype(+expr.function())
	-(-f) = f
template<class F1 , class F2 >
static auto	Dune::ACFem::operator- (const BinaryGridFunctionExpression< MinusOperation, F1, F2 > &expr) -> decltype(expr.rightFunction() - expr.leftFunction())
	-(f - g) = g - f
template<class F1 , class F2 >
static auto	Dune::ACFem::operator- (const BinaryGridFunctionExpression< PlusOperation, UnaryGridFunctionExpression< MinusOperation, F1 >, F2 > &expr) -> decltype(expr.leftFunction().function() - expr.rightFunction())
	-(-f + g) = f - g

Detailed Description