Count
function Count: Integer;
Example
procedure HasBoundary(const BoundaryStack: TIdMIMEBoundary;
var Value: Variant);
begin
Value := BoundaryStack.Count > 0;
end;
Usage
Count returns the number of stored boundary strings, which is the MIME nesting depth and the authoritative empty-stack check.
Additional Technical Info
Count returns the item count of the internal boundary-string list. Under normal paired operation this is also the current MIME nesting depth and the number of stored parent-part indexes.
Use Count > 0 to determine whether Boundary represents a stack entry. Testing Boundary <> '' is not equivalent because Push permits an empty boundary string.
The method deliberately does not compare the parallel parent-part list. If an earlier partial failure or unsafe concurrent mutation desynchronized the two lists, Count reports only the boundary side and does not detect or repair the mismatch.
The read is constant-time and has no side effects, but the mutable object provides no synchronization. The source-reviewed example uses it as the authoritative empty check and was not runtime-tested.
External references
- Embarcadero DocWiki:
System.Classes.TStringList.Count- underlying count property. - Free Pascal:
TStringList- compatible core list context; Velox uses Delphi.