xsharp.eu

Hi guys!

I want to apply this attribute to a property :

[Option('i',"input",Required := true, HelpText := "Input file to read.")];

But I get this error:

XS0182 An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute parameter type

What am I doing wrong?

TIA
Meinhard

Meinhard,

What happens if you use "i" in stead of 'i' ?

Robert

Hi Meinhard,

a complete shot in the dark (before Robert gives the right answer):

I would try
Wolfgang

Hi Robert,

same message.

Regards
Meinhard

Hi Wolfgang,

already tried, but accroding to the grammar this is invalid syntax anyway.

Regards
Meinhard

Meinhard,

what type is the OptionAttribute ?
And what happens if you omit one or more values from the definition ?
Can you send me the assembly that defines the optionattribute class ?

Robert

Hi Robert,

just sent you the complete solution (small) via email.

TIA & Regards
Meinhard

For those reading :

We have found the problem with Meinhards code: there is a problem handling literal character values in Attributes and Switch statements.
In this case the OptionAttribute class expects a literal character followed by a literal string, and this is not handled properly by the compiler.

We will fix this asap.

Robert

Hi,

again this fast reaction of the development team confirms my decision to use X# as my primary development tool.

Wolfgang

Indeed!