complex Lexer
Only public method of the class, evaluates a ComplexList to convert the Tokens.REAL_NUMBER and Tokens.IMAGINARY_NUMBER values into Tokens.COMPLEX_NUMBER values.
the returned value should be passed to the AstTree class constructor
Return
a ComplexList with Tokens.COMPLEX_NUMBER values instead of Tokens.REAL_NUMBER and Tokens.IMAGINARY_NUMBER
Since
Version 1.0