Sequences

Generation of sequences. More...

Classes
struct	tgen::sequence< T >
	Sequence generator. More...
struct	tgen::sequence< T >::instance
	Sequence instance. More...

Detailed Description

Generation of sequences.

Its instances have the properties:

• tgen::is_sequential
• tgen::has_subset_defined

Examples

Random 20 distinct values from 1 to 100.

std::cout <<
    tgen::sequence<int>(20, 1, 100).distinct().gen() << std::endl;
// "67 96 80 11 46 52 42 2 93 1 28 3 48 82 90 99 53 98 94 88"

Random Palindrome of length 7.

auto s = tgen::sequence<int>(7, 0, 9);
for (int i = 0; i <= 2; ++i) s.equal(i, 6-i);
std::cout << s.gen() << std::endl;
// "3 1 9 6 9 1 3"

Random 3 runs of 4 equal numbers. Values between runs are distinct.

std::cout <<
    tgen::sequence<int>(12, 1, 10)
    .equal_range(0, 3).equal_range(4, 7).equal_range(8, 11)
    .distinct({0, 4, 8}).gen() << std::endl;
// "3 3 3 3 2 2 2 2 9 9 9 9"

Random DNA sequence of length 8 with no equal adjacent values.

auto s2 = tgen::sequence(8, {'A','C','G','T'});
for (int i = 1; i < 8; i++) s2.different(i-1, i);
std::cout << s2.gen() << std::endl;
// "T C T G T G A C"

Random binary sequence of length 10 with 5 1's that start with 1.

std::cout <<
    tgen::sequence<int>(10, 0, 1)
    .fix(0, 1)
    .gen_until([](const auto& inst) {
        auto vec = inst.to_std();
        return accumulate(vec.begin(), vec.end(), 0) == 5;
    }, 100) << std::endl;
// "1 0 0 1 0 1 1 0 1 0"