numeric - CTL - C Container Template library

Defined in header <ctl/numeric.h>, requested via #define INCLUDE_NUMERIC.

SYNOPSIS

#define T int
#define N 20
#define INCLUDE_NUMERIC
#include <ctl/array.h>

arr20_double_iota (&a, 0);

DESCRIPTION

The numerics library includes common mathematical functions and types, as well as optimized numeric arrays and support for random number generation. It is only included when you define INCLUDE_NUMERIC before loading the container.

Numeric operations

iota (A* self, T value)
iota_range (I* range, T value)

fills a range with successive increments of the starting value. When T is a struct, you need to define a T_inc postfix increment method, as in tests/func/digi.hh, returning an old copy:

static digi
digi_inc(digi* a)
{
    digi old = digi_init(*a->value);
    (*a->value)++;
    return old;
}

equivalent to the matching C++ postfix increment operator:

DIGI operator++(int)
{
    DIGI old = *this;
    (*value)++;
    return old;
}


accumulate

sums up a range of elements.

inner_product

computes the inner product of two ranges of elements.

adjacent_difference

computes the differences between adjacent elements in a range.

partial_sum

computes the partial sum of a range of elements.

reduce (C++17)

similar to std::accumulate, except out of order.

exclusive_scan (C++17)

similar to partial_sum, excludes the ith input element from the i-th sum.

inclusive_scan (C++17)

similar to partial_sum, includes the ith input element in the i-th sum.

transform_reduce (C++17)

applies an invocable, then reduces out of order.

transform_exclusive_scan (C++17)

applies an invocable, then calculates exclusive scan.

transform_inclusive_scan (C++17)

applies an invocable, then calculates inclusive scan.