[Rd] Capturing environment associated with a promise

Hi all, It's possible to capture the expression associated with a promise (using substitute). Is there any way to capture the environment associated with a promise? Similarly, is there any way to tell if something is a promise without accidentally evaluating it? Thanks! Hadley -- RStudio /

Re: [Rd] Capturing environment associated with a promise

On 12-10-08 9:22 AM, Hadley Wickham wrote: Hi all, It's possible to capture the expression associated with a promise (using substitute). Is there any way to capture the environment associated with a promise? Similarly, is there any way to tell if something is a promise without accidentally

Re: [Rd] Capturing environment associated with a promise

Promises are an implementation detail -- we need to be able to change them, optimize them away, etc, so there is a limit on what we want to expose. Allowing a query of whether a binding is delayed or not should be OK but would want to think that through more carefully before committing to this.

Re: [Rd] Effect of the R framework on ctype.c

Sylvain, I can see two possible reasons for this (both just speculative without an actual example): a) it could be a conflict in (probably system) headers. isupper is typically a macro so I suspect what happens is that you have two definitions and depending on the sequence of includes and

Re: [Rd] Capturing environment associated with a promise

On Mon, Oct 8, 2012 at 9:22 AM, Hadley Wickham h.wick...@gmail.com wrote: Hi all, It's possible to capture the expression associated with a promise (using substitute). Is there any way to capture the environment associated with a promise? Similarly, is there any way to tell if something is