[fpc-pascal] a proposal about "with" syntax

[Paul Ishenin]

17.03.13, 20:16, Sven Barth пишет:

> But we aren't in a constant or type section here. Also one uses ":=" in
> the for-loop header.

I agree that ':=' should be used but I would not say that '=' is not 
pascalish :)

Let's look look at possibilities:

1. 'as' can't be used because we can use expressions in with and we can 
'as' typecasting.
2. '=' can't be used because we can use expressions and '=' can be a 
part of expression. For example 'with DoSomething(a = b) do'.
3. ':=' can be used since we can't use assignments in with expressions.
4. ':' (Marco suggesion) can be used - it is not used in expressions. 
':' is used in pascal to:
   - separate variable and type,
   - in write intristic
   - in record constants to separate field and value
5. We can use some new keyword or reuse some keyword which is not used 
in expressions.

If I need to choose from 3, 4 and 5 I would use ':=' syntax because it 
more like to assignment:

with a := TStringList.Create do
begin
   Text := 'bla';
   DoSomething(a);
   Free;
end;

Best regards,
Paul Ishenin