TASKING Script Debugger User Guide

TASKING Script Debugger User Guideinvalid: abc, $0, $_abc.There is no maximum length for identifiers and they are case-sensitive.Identifiers beginning with $_ are used or reserved for internal purposes. With the exception of thosementioned in this document, they are not accessible.2.3. Special IdentifiersThe following table lists identifiers that have a special meaning.Identifier$__FILE__$__LINE__$args and $_args$global$thisDescriptionevaluates to a string equal to the name of the script file, for example"myscript.dscr"evaluates to a number equal to the (one-based) line number where thisidentifier appearssee Section 2.12.4, Variable Argument Listglobal scope prefix; (see Section 2.12.2, Accessing Global Variables)class instance (see Section 2.13, Classes)2.4. Whitespace and CommentsWhitespace is significant in essentially the same situations as it is in C.You can include C++ style sourcecomments or use the number sign (#), which extends to (but does not include) the next line break.Comments of the form /* … */ can be nested. Here are some examples:$c =$a + $b; // Same as $c = $a + $b;/* Following /* code */ will be executed. */ $printnl("Hello");$printnl("world."); # This is a comment.2.5. Include StatementsUsing include "file name", a script can include another script. This inclusion takes place only once,when the including script is compiled.2.6. Nil, $defined(...) and $delete(...)Internally, every variable and expression is represented by a so-called "handle". This handle can refer toan existing object, but may also be nil, which is comparable to NULL in C/C++. Note however that nil isnot a keyword.In many cases, if you try to use a nil handle, an error occurs and the script will cause an exception of type"#NIL_OBJECT".10