How to delete or destruct an instance of a data structure or a record?
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19-06-2021 - |
سؤال
I have a data structure as follows.
TJustCalGroup = record
SigName,GroupName:string;
RawMin,RawMax:LongInt;
end;
I create an instance of the record or data structure as follows.
var ARecord := new TJustCalGroup;
Then, I want to delete the instance or mark it as being unused. So, I am doing the following.
ARecord := Nil;
However, it is not working. It keeps raising an error, "Can not assign nil to TJustCalGroup."
So, then how do you make it nil or null or free up its memory?
المحلول
A delphi prism (or Oxygene)record is equivalent to a Struct , the structs (or records) are value types and is allocated always on the stack (even when you uses the new operator), so you don't need free the memory.
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