policy_container_example.cpp

Demonstrates policy-based container with pluggable storage.

Demonstrates policy-based container with pluggable storage.Shows dynamic_storage_policy and indexed_storage_policy for different access patterns and performance characteristics.

See also

kcenon::container::basic_value_container

kcenon::container::policy::dynamic_storage_policy

// BSD 3-Clause License
// Copyright (c) 2021-2025, 🍀☀🌕🌥 🌊
// See the LICENSE file in the project root for full license information.
 
 
#include <kcenon/container/policy_container.h>
#include <kcenon/container/storage_policy.h>
 
#include <iostream>
#include <string>
 
using namespace kcenon::container;
 
int main()
{
    std::cout << "=== Policy Container Example ===" << std::endl;
 
    // 1. Dynamic storage policy (default, flexible)
    std::cout << "\n1. Dynamic storage policy:" << std::endl;
    basic_value_container<policy::dynamic_storage_policy> dynamic_container;
 
    dynamic_container.set("name", "Alice");
    dynamic_container.set("score", 95.5);
    dynamic_container.set("level", static_cast<int64_t>(42));
 
    std::cout << "   Added 3 fields to dynamic container" << std::endl;
    std::cout << "   Size: " << dynamic_container.size() << std::endl;
 
    // 2. Indexed storage policy (optimized for key lookup)
    std::cout << "\n2. Indexed storage policy:" << std::endl;
    basic_value_container<policy::indexed_storage_policy> indexed_container;
 
    indexed_container.set("id", static_cast<int64_t>(1001));
    indexed_container.set("status", "active");
 
    std::cout << "   Added 2 fields to indexed container" << std::endl;
    std::cout << "   Size: " << indexed_container.size() << std::endl;
 
    // 3. StoragePolicy concept check
    std::cout << "\n3. Storage policy traits:" << std::endl;
    std::cout << "   dynamic_storage_policy satisfies StoragePolicy: "
              << policy::StoragePolicy<policy::dynamic_storage_policy> << std::endl;
    std::cout << "   indexed_storage_policy satisfies StoragePolicy: "
              << policy::StoragePolicy<policy::indexed_storage_policy> << std::endl;
 
    std::cout << "\nDone." << std::endl;
    return 0;
}