[JoBullet]

Today I learned that there exists a keyword named "defined", its design is very much same as sizeof though its functionality is similar to "#if defined" pre-processor construct. "defined" keyword resolves at compile-time to constant-expression(in this case bool: tagged). Its functionality is to deduce existance of either local or global variable, function, state variable or macro.
Syntax: (parentheses are optional)

Код:

if(defined symbol)
{}
if(defined(symbol))
{}
new const symbol_exists = defined(symbol);