Simple Ast Node property question

Hi Zach,

You can do this sort of thing in a tree construction portion of a production (when using our LL(*) Parser Framework):

Ast<QualifiedName>().SetProperty(qn => qn.IsGlobal, true);

The above is what we do in our VB grammar for the .NET Languages Add-on in one spot.

I may have misunderstood something, but setting the property to true results in the variable always being true.  I understand how to set the property, the issue is doing so conditionally based on whether or not an optional terminal is present.

Hi Zach,

Ok in that case, you can do the same thing but instead of passing true explicitly, you can have it look at a matched result like AstFrom("myterminal").  If that value is "true" then it will set the property as true.  Likewise, "false" will set the property as false.  Any other value won't touch the property.

So the related production could be like:

aNonTerminal.Production = ... + @myterminal["myterminal"].Optional() + ...

And then you'd have your tree construction per above for this production.  I hope that clarifies it better.