Invert

Invert an input range.

template <typename TInput>
class invert : public etl::unary_function<TInput, TInput>

TInput The input data type.

invert() 

Description
offset = 0 minuend = etl::numeric_limits<TInput>::is_signed) ? TInput(0) : etl::numeric_limits<TInput>::max())

If the type is signed then the input values have their sign changed.
i.e. 10 => -10, -10 => 10.
If the type is unsigned then the input values are subtracted from the type’s maximum value.

invert(TInput offset, TInput minuend)

Description
Sets the offset and minuend.

TInput operator()(TInput value) const

Description
Invert a value. Calculates minuend - (value - offset)

Example

std::array<int, 10> input = 
{ 
  10, 11, 12, 13, 14, 15, 16, 17, 18, 19
};

std::array<int, 10> output;

etl::invert<int> invert(10, 100); // offset = 10, minuend = 100

std::transform(input.begin(), input.end(), output.begin(), invert);

// output = 100.0, 99.0, 98.0, 97.0, 96.0, 95.0, 94.0, 93.0, 92.0, 91.0