Why `TRVStyleTemplate(nil).ApplyToTextStyle` works??

[edwinyzh]

I've found many occurrences of

Code: Select all

TRVStyleTemplate(nil).ApplyToTextStyle

in the TRichView codebase, but it puzzles me - why casting nil as TRVStyleTemplate works??

Anyone can tell me? Thanks.

[Sergey Tkachenko]

TRVStyleTemplate.ApplyToTextStyle was designed to work correctly if called for nil objects.
The code inside this method checks if Self = nil, and if True, it unassigns the text style (from the parameter) from a text style template.

[edwinyzh]

Oh I see, thanks!