Guard() [8/10]

static bool Debug.Guard ( bool  condition, [NotNull] Expression< Func< object >>  classMember, Object  context = null  )

static

If condition is false logs to the Console an error message containing the name and value of classMember class member and returns true.

If condition is true returns false without logging anything.

This can be useful for checking that the arguments passed to a function are valid and if not returning early with an error.

An error is only logged the first time during a session that the condition evaluates to false to avoid flooding the log file.

In release builds an error will only be logged if the UNITY_ASSERTIONS symbol is defined.

private void CopyComponent(Component component, GameObject to)
{
    if(Debug.Guard(component != null, ()=>component) || Debug.Guard(to != null, ()=>to))
    {
        return;
    }
 
    var copy = to.AddComponent(component.GetType());
    var json = JsonUtility.ToJson(component);
    JsonUtility.FromJsonOverwrite(json, copy);
}

Parameters

condition	Condition you expect to be true.
classMember	Expression pointing to a class member whose name and value will be logged.
context	Object to which the assertion applies.

Returns

true if condition was false; otherwise, false.