avl/example.cpp at main · moshikod/avl · GitHub

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/**
 * @file example.cpp
 * @author Moshe Pontch (pontch at gmail.com)
 * @brief Simple, concise usage example of the AVL library
 * @date 2025-06-24
 *
 */
#include <bitset>
#include <iostream>
#include <thread>

#include "avl_tool.h"

struct TestData
{
    int i;
};

template <typename Char, typename Traits>
std::basic_ostream<Char, Traits> &operator<<(std::basic_ostream<Char, Traits> &os, const TestData &data)
{
    const auto flags = avl_flags(os);

    if (flags & avl::preorder)
    {
        os << std::bitset<8>(data.i);
    }
    else if (flags & avl::inorder)
    {
        os << std::oct << std::showbase << data.i;
    }
    else if (flags & avl::postorder)
    {
        os << std::hex << std::showbase << data.i;
    }
    else
    {
        os << std::dec << data.i;
    }

    return os;
}

template <typename Char, typename Traits>
void example(std::basic_ostream<Char, Traits> &os)
{
    AvlTree<TestData> tree;

    srand(time(0));

    for (int i = 0; i < 24; i++)
    {
        const auto key = rand() % 100;
        tree.insert(key, {key});
    }

    os << "summary with the default flat representation" << std::endl;
    os << avl_summary << tree;
    os << avl_simple; // reset summary
    os << std::endl
       << "preorder traversal using binary base" << std::endl;
    os << avl_preorder << tree;
    os << std::endl
       << "inorder traversal using octal base" << std::endl;
    os << avl_inorder << tree;
    os << std::endl
       << "postorder traversal using hexadecimal base" << std::endl;
    os << avl_postorder << tree;
    os << std::endl
       << "levelorder traversal using decimal base" << std::endl;
    os << avl_levelorder << tree;
}

#ifdef __cplusplus
extern "C"
{
#endif

    int main()
    {
        try
        {
            /* attempt to use wide characters */
            std::locale::global(std::locale(""));
            std::cout.imbue(std::locale());
            example(std::wcout);
        }
        catch (const std::exception &e)
        {
            std::locale::global(std::locale::classic());
            std::cout.imbue(std::locale::classic());
            example(std::cout);
        }
        return 0;
    }

#ifdef __cplusplus
}
#endif