unreal ensureMsgf example

The ensureMsgf function in Unreal Engine is used for error handling and debugging purposes. It is commonly used to ensure that certain conditions are met during runtime, and if not, it will log an error message with the specified format.

Here is an example of how the ensureMsgf function is used in C++:

void DoSomething(int value)
{
    ensureMsgf(value > 0, TEXT("Value must be greater than zero!"));

    // Rest of the function implementation
}

Explanation of each step:

  1. ensureMsgf is the name of the function. It is a macro defined in the Unreal Engine codebase that expands to a series of statements.

  2. value > 0 is the condition that needs to be checked. In this example, it checks if the value parameter is greater than zero.

  3. TEXT("Value must be greater than zero!") is the error message format string. The TEXT macro is used to ensure that the string literal is correctly encoded for the platform's character set.

  4. If the condition value > 0 is false (i.e., the value is not greater than zero), the ensureMsgf function will log an error message using the specified format string. The error message will typically be displayed in the Unreal Engine editor's output log or in the console.

  5. If the ensureMsgf function is triggered, it will cause the program execution to halt or break, depending on the debugging settings.

It is important to note that the ensureMsgf function is primarily used for development and debugging purposes. It is typically removed or disabled in release builds to improve performance.

I hope this explanation helps you understand the ensureMsgf function in Unreal Engine's C++ programming language. If you have any further questions, feel free to ask!