[Done] 4.5 b2 x86 Structured pointer access to map fails

[netmaestro]

Code: Select all

Structure zoo
  Map cat.l()
EndStructure

*buf.zoo = AllocateMemory(SizeOf(zoo))

*buf\cat("felix") = 36

Debug *buf\cat("felix") 

A variable of type zoo works without error, however the structured memory block causes an IMA.

[ts-soft]

You have to Initialisize the structure:

Code: Select all

 Structure  zoo
  Map cat.l()
EndStructure

*buf.zoo = AllocateMemory(SizeOf(zoo))
InitializeStructure(*buf, zoo)
*buf\cat("felix") = 36

Debug *buf\cat("felix")

greetings
Thomas

[netmaestro]

Thanks Thomas - so that's what InitializeStructure is for. The docs don't properly explain that.

[ts-soft]

I have asked in the German forum for this function and freak has explained the function to me

[milan1612]

makes sense, thanks for the explanation ts

[gnasen]

InitializeStructure() is a very powerful command you can use for example to create trees (which are some lists in lists in lists...). Its some kind of tricky, but very powerful, example:
http://www.purebasic.fr/german/viewtopi ... =8&t=22177