Setting up simdjson 3.12.1 in Visual Studio 2022 using CMake

• Install simdjson using this guide: How to install simdjson 3.12.1 using CMake and Visual Studio 2022 for Desktop
• Run Visual Studio
• Click on the "Create a new project" button:

• Click on the "CMake Project" and click on the "Next" button:

• Type a project name, set a project location, check the "Place solution and project in the same directory" checkbox, and click on the "Create" button:

• Wait a few seconds for "Ready" in the left bottom corner:

• Run the project by click on the empty green triangle (or Ctrl+F5):

• The program prints "Hello CMake" to the console:

• Double click on the "CMakePresets.json" file:

• Add the "simdjson_DIR" variable for "Debug" and "Release":

        {
            "name": "x64-debug",
            "displayName": "x64 Debug",
            "inherits": "windows-base",
            "architecture": {
                "value": "x64",
                "strategy": "external"
            },
            "cacheVariables": {
                "CMAKE_BUILD_TYPE": "Debug",
                "simdjson_DIR": {
                    "value": "E:/libs/simdjson-3.12.1-msvc/win/debug/lib/cmake/simdjson",
                    "type": "PATH"
                }
            }
        },
        {
            "name": "x64-release",
            "displayName": "x64 Release",
            "inherits": "x64-debug",
            "cacheVariables": {
                "CMAKE_BUILD_TYPE": "Release",
                "simdjson_DIR": {
                    "value": "E:/libs/simdjson-3.12.1-msvc/win/release/lib/cmake/simdjson",
                    "type": "PATH"
                }
            }
        },

• Create the empty "assets" folder inside of the "hello-simdjson" project folder
• Create the "users.json" file inside of the "assets" folder:

• Copy and paste the following content to the "users.json" file:

{
  "people": [
    {
      "person": {
        "name": "Alice",
        "age": 30
      }
    },
    {
      "person": {
        "name": "Bob",
        "age": 25
      }
    },
    {
      "person": {
        "name": "Charlie",
        "age": 35
      }
    },
    {
      "person": {
        "name": "David",
        "age": 28
      }
    },
    {
      "person": {
        "name": "Eve",
        "age": 22
      }
    },
    {
      "person": {
        "name": "Frank",
        "age": 40
      }
    },
    {
      "person": {
        "name": "Grace",
        "age": 32
      }
    },
    {
      "person": {
        "name": "Henry",
        "age": 27
      }
    },
    {
      "person": {
        "name": "Ivy",
        "age": 29
      }
    },
    {
      "person": {
        "name": "Jack",
        "age": 31
      }
    }
  ]
}

• Double click on the "CMakeLists.txt" file:

• Add this code to the "CMakeLists.txt" file:

find_package(simdjson)
target_link_libraries(hello-simdjson PRIVATE simdjson::simdjson)

# Copy the assets folder to the dist folder
add_custom_command(TARGET hello-simdjson POST_BUILD
    COMMAND ${CMAKE_COMMAND} -E copy_directory
    ${CMAKE_SOURCE_DIR}/assets $<TARGET_FILE_DIR:hello-simdjson>/assets)

• Double click on the "hello-simdjson.cpp" file:

• Replace the "hello-simdjson.cpp" file content with this one:

#include <fstream>
#include <iostream>
#include <simdjson.h>

std::string readFile(const std::string& path)
{
    std::ifstream f(path);
    if (!f.is_open())
    {
        std::cout << "Failed to open the file: " << path << std::endl;
        return "";
    }
    std::stringstream sstr;
    f >> sstr.rdbuf();
    std::string content = sstr.str();
    f.close();
    return content;
}

int main()
{
    // Read the JSON-file content
    std::string fileContent = readFile("./assets/users.json");

    // Create the simdjson document and load a file content to the document
    simdjson::dom::parser parser;
    simdjson::dom::element doc = parser.parse(fileContent);

    // Get names and ages and print them
    simdjson::dom::array people = doc["people"].get_array();
    for (simdjson::dom::object person : people)
    {
        //std::string name = std::string(person["name"].get_string());
        std::string name(person["person"]["name"].get_c_str());
        int age = person["person"]["age"].get_int64();
        std::cout << name << ": " << age << std::endl;
    }

    return 0;
}

• Press Ctrl+F5 to run the application
• You see this result:

Alice: 30
Bob: 25
Charlie: 35
David: 28
Eve: 22
Frank: 40
Grace: 32
Henry: 27
Ivy: 29
Jack: 31