[fpc-pascal] optional parameter

[spir ☣]

Hello,

A few questions on the topic:

* Is it possible to define an optional parameter without default value?

* Is it at all possible for an optional *argument* not to be the last in actual call? Eg
     procedure p(a:Integer=0 ; b:Integer=0)
  How can the caller pass b and not a?

* The ref states: "For dynamic arrays or other types that can be considered as equivalent to a pointer, the only possible default value is Nil."
Does this apply to any non-atomic type? Which are the "other types that can be considered as equivalent to a pointer"?
Tried with a record, but cannot make it be accepted by the compiler. Needed to change the parameter to be a pointer to the record instead (so the default can be nil), but this creates a trap for the calling code.
Else, is there a common trick or workaround?


Denis
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vit esse estrany ☣

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