Invert

20.9.0

Invert an input range.

template <typename TInput>

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

TInput The input data type.

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invert()

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)

Sets the offset and minuend.

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TInput operator()(TInput value) const

Invert a value.

Calculates minuend - (value - offset)

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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

invert.h