operator-()

Matrix<common_value, common_allocator, void, common_policy> Chusov::Math::operator-	(	const Matrix< val1_t, alloc1_t, der1_t, policy1_t > &	left,
		const Matrix< val2_t, alloc2_t, der2_t, policy2_t > &	right
	)

Subtracts two matrices.

Template Parameters

val1_t	is a type of an element of the left matrix.
alloc1_t	is a type of an allocator used by the left operand.
der1_t	is a derived type of the first operand. See Matrix::derived_type.
policy1_t	is an execution policy of the first operand.
val2_t	is a type of an element of the right matrix.
alloc2_t	is a type of an allocator used by the right operand. It must match the first allocator so that std::is_same<alloc_1, std::allocator_traits<alloc2>::template rebind_alloc<val1_t>>::value; is true.
der2_t	is a derived type of the second operand. See Matrix::derived_type.
policy2_t	is an execution policy of the second operand.

Parameters

left	is a reference to the left operand.
right	is a reference to the right operand.

Returns

A new matrix which is a difference of the operands. The elements of the resulting matrix type are defines as follows:

- A type of an element is determined by the [std::common_type](http://en.cppreference.com/w/cpp/types/common_type) metafunction.
- A type of allocator is determined by the [std::allocator_traits<alloc1_t>::rebind_alloc](http://en.cppreference.com/w/cpp/memory/allocator_traits)
  for the resulting type of elements.
- The implementing matrix type is \p void (i.e. the implementor of the result is the \re Matrix class).
- An execution policy is determined by the \ref Chusov::Math::common_policy "common_policy" metafunction.

Remarks

The operation is defined only when a common type of the resulting matrix meets the requirements of the additive group concept.

Exceptions

Chusov::Exceptions::InvalidParameterException

Dimensions of the matrices do not match.

Examples

chsvmath\algebraic_traits.cpp.