On Wednesday, 25 May 2016 at 00:36:04 UTC, Seb wrote:
On Tuesday, 24 May 2016 at 19:03:11 UTC, ArturG wrote:
would something like this be usefull?

A general word of advice - try to keep your post short & concise. It is more likely to get replies then.


Yes i might have used to many examples, should have used dpaste for all of them.

Yes it would be to me, but I am not sure whether it would justify the rather uncommon #{} syntax. Does any language out there use it?


The syntax is of course up for debate, but similar to the with statement and others it creates its own scope so it should'nt be and exception and also use the {}. Just picked the # because i needed a separator for the input and its optional parameters and it's a easy to reach single symbol which isnt ambigius with other D symbols.

We cant use the syntax from freatures which provide similar functionality from other languages[1], because they use existing D syntax and are'nt as flexible as the with expression/statement.

D already has similar syntax for struct initialiser and anonymous classes and as it can be chained it also kinda behaves like a eagerly called function/delegate.

[1] https://en.wikipedia.org/wiki/Method_cascading

For the expression?, imho it is very useful - existence checks are very common. I know that at least ruby and CoffeeScript have it. Do you know more?

c#, dart and others but they only have the ?. operator.
c# has ?[ for checked index and you might also want ?( for checked opCall which i didnt want to propose because it can be done with the with expression.

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