### JSON Configuration Management Example (C++)

Source: https://context7.com/bouncmpe/cpp-project-template/llms.txt

An integration example in C++ demonstrating a `ConfigManager` class that uses the `bouncmpe::jsonmerge` function to apply multiple updates to a base JSON configuration. It shows dynamic configuration loading and merging for application settings. Dependencies include Boost.JSON and the library's `jsonmerge` functionality.

```cpp
#include "bouncmpe/jsonmerge.hpp"
#include <boost/json.hpp>
#include <iostream>
#include <fstream>

class ConfigManager {
public:
    ConfigManager(const boost::json::value& base_config)
        : config(base_config) {}

    void applyUpdate(const boost::json::value& update) {
        config = bouncmpe::jsonmerge(config, update);
    }

    boost::json::value getConfig() const {
        return config;
    }

private:
    boost::json::value config;
};

int main() {
    // Base configuration
    boost::json::value base_config = {
        {"database", {
            {"host", "localhost"},
            {"port", 5432},
            {"timeout", 30}
        }},
        {"logging", {
            {"level", "info"},
            {"format", "json"}
        }}
    };

    ConfigManager manager(base_config);

    // Apply production overrides
    boost::json::value prod_override = {
        {"database", {
            {"host", "prod-db.example.com"},
            {"port", 5433}
        }},
        {"logging", {
            {"level", "warn"}
        }}
    };

    manager.applyUpdate(prod_override);

    // Apply environment-specific settings
    boost::json::value env_settings = {
        {"database", {
            {"pool_size", 20}
        }},
        {"cache", {
            {"enabled", true},
            {"ttl", 3600}
        }}
    };

    manager.applyUpdate(env_settings);

    std::cout << "Final config: " << manager.getConfig() << std::endl;

    return 0;
}
```

--------------------------------

### add_two_integer - Integer Addition Utility

Source: https://context7.com/bouncmpe/cpp-project-template/llms.txt

A simple utility function that adds two integers and returns their sum. This function serves as a basic example of the library's interface pattern and can be used for testing the build system integration.

```APIDOC
## Integer Addition Utility

### Description
A simple utility function that adds two integers and returns their sum.

### Method
Internal Library Function (not a direct API endpoint)

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

### Request Example
```cpp
#include "bouncmpe/jsonmerge.hpp"

int main() {
    int a = 10;
    int b = 12;
    int result = bouncmpe::add_two_integer(a, b);
    // Expected result: 22
    return 0;
}
```

### Response
#### Success Response
- **result** (int) - The sum of the two input integers.
```

--------------------------------

### Add Two Integers Utility Function (C++)

Source: https://context7.com/bouncmpe/cpp-project-template/llms.txt

A simple C++ utility function that performs addition on two integers. It serves as a basic example of the library's interface and is useful for verifying build system integration. It takes two integers as input and returns their sum. No external dependencies are required beyond standard C++ libraries.

```cpp
#include "bouncmpe/jsonmerge.hpp"

int main() {
    int a = 10;
    int b = 12;

    // Add two integers
    int result = bouncmpe::add_two_integer(a, b);

    // Expected result: 22
    std::cout << "Result: " << result << std::endl;

    return 0;
}
```

--------------------------------

### Build and Test C++ Project with CMake and Make (Bash)

Source: https://context7.com/bouncmpe/cpp-project-template/llms.txt

Shell commands for building and testing the C++ project using CMake and Make. The `make all` command configures, builds, and tests the project. Individual steps include CMake configuration, building, and running tests via CTest. Requires CMake, Make, and a C++ compiler.

```bash
# Configure, build, and test in one command
make all

# Or run steps individually:

# Configure CMake project
cmake -S . -B /tmp/build -DCMAKE_BUILD_TYPE=Release -DENABLE_TESTS=ON

# Build the library
cmake --build /tmp/build

# Run test suite
ctest --test-dir /tmp/build --output-on-failure
```

--------------------------------

### CMake Configuration for C++ Project with Boost.JSON

Source: https://github.com/bouncmpe/cpp-project-template/blob/main/CMakeLists.txt

This CMakeLists.txt file configures a C++ project named 'LIBBOUNCMPE'. It sets the C++ standard to 17, finds and links the Boost.JSON library (version 1.81), and defines include directories. It also conditionally includes subdirectories for tests and applications based on build flags.

```cmake
cmake_minimum_required(VERSION 3.20)

project("LIBBOUNCMPE" CXX)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

add_library(bouncmpe)
find_package(Boost 1.81 COMPONENTS json REQUIRED)

target_include_directories(
  bouncmpe
  PUBLIC 
    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
    $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}>/include
)
target_sources(
  bouncmpe
  PRIVATE 
    "src/jsonmerge.cpp"
)
target_link_libraries(
  bouncmpe
  PUBLIC 
    Boost::json
)

if (ENABLE_TESTS)
    add_subdirectory(tests)
    enable_testing()
endif()

if (BOUNCMPE_BUILD_APPS)
    add_subdirectory(apps)
endif()
```

--------------------------------

### Merge JSON Objects with Boost.JSON (C++)

Source: https://context7.com/bouncmpe/cpp-project-template/llms.txt

Core C++ function for merging two JSON objects using Boost.JSON. It takes a target JSON object and a patch object, applying the patch's values to the target. This function is essential for updating configurations or combining API responses. It requires Boost.JSON and standard C++ exception handling.

```cpp
#include "bouncmpe/jsonmerge.hpp"
#include <boost/json.hpp>
#include <iostream>

int main() {
    // Create target JSON object
    boost::json::value target = {
        {"key1", "v1"},
        {"key2", "a"},
        {"nested", {
            {"field1", 100},
            {"field2", "original"}
        }}
    };

    // Create patch JSON object
    boost::json::value patch = {
        {"key1", "v2"},  // Override existing key
        {"key3", "new"}  // Add new key
    };

    try {
        // Perform merge operation
        boost::json::value result = bouncmpe::jsonmerge(target, patch);

        // Expected result: {"key1":"v2", "key2":"a", "key3":"new", "nested":{...}}
        std::cout << "Merged JSON: " << result << std::endl;

    } catch (const std::exception& e) {
        std::cerr << "Error during merge: " << e.what() << std::endl;
        return 1;
    }

    return 0;
}
```

--------------------------------

### jsonmerge - JSON Object Merging

Source: https://context7.com/bouncmpe/cpp-project-template/llms.txt

Merges two JSON values by applying patch values to a target JSON object. The function takes two Boost.JSON value objects and returns a merged result. This is the core functionality of the library, enabling dynamic JSON manipulation.

```APIDOC
## JSON Object Merging

### Description
Merges two JSON values by applying patch values to a target JSON object. This function is the core functionality of the library.

### Method
Internal Library Function (not a direct API endpoint)

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

### Request Example
```cpp
#include "bouncmpe/jsonmerge.hpp"
#include <boost/json.hpp>
#include <iostream>

int main() {
    boost::json::value target = {
        {"key1", "v1"},
        {"key2", "a"},
        {"nested", {
            {"field1", 100},
            {"field2", "original"}
        }}
    };

    boost::json::value patch = {
        {"key1", "v2"}, 
        {"key3", "new"}
    };

    try {
        boost::json::value result = bouncmpe::jsonmerge(target, patch);
        // Expected result: {"key1":"v2", "key2":"a", "key3":"new", "nested":{...}}
        std::cout << "Merged JSON: " << result << std::endl;
    } catch (const std::exception& e) {
        std::cerr << "Error during merge: " << e.what() << std::endl;
        return 1;
    }

    return 0;
}
```

### Response
#### Success Response
- **result** (boost::json::value) - The merged JSON object.
```

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