Actually, it's name is "n":
julia> function getfn()
return function(); 1; end
end
getfn (generic function with 1 method)
julia> const n = getfn()
(anonymous function)
julia> n()
1
On Sat, May 30, 2015 at 5:09 PM, David P. Sanders <dpsand...@gmail.com>
wrote:
>
>
> El domingo, 31 de mayo de 2015, 0:37:45 (UTC+2), Jameson escribió:
>>
>> But "@eval" is still a macro, so it is even better to rewrite this
>> without that:
>> function getfn()
>> return function(); 1; end
>> end
>> const n = getfn()
>>
>
> This does not give quite the same answer, though, since the function does
> not have a name.
> Is there a way to specify the name of a generated function like this?
>
>
>>
>> On Sat, May 30, 2015 at 2:30 PM David Gold <david....@gmail.com> wrote:
>>
>>> Something to note about Tom's method is that the name function must be
>>> passed to gf as a symbol, unlike in the case of a macro. However, in most
>>> cases this slight difference probably will not warrant a macro.
>>>
>>>
>>> On Friday, May 29, 2015 at 8:58:56 PM UTC-4, Tom Lee wrote:
>>>>
>>>> You don't need to use a macro, a function can do this:
>>>>
>>>> julia> function gf(n::Symbol = gensym())
>>>> @eval function $(n)()
>>>> 1
>>>> end
>>>> end
>>>>
>>>> I've also made the n argument optional, with gensym creating a unique
>>>> name by default - the newly defined function is returned by gf, so you
>>>> don't necessarily need to know its name. And of course if you give gf
>>>> additional arguments you can programatically construct expressions based
>>>> those and easily $ them into the @eval block. It's all very awesome.
>>>>
>>>> But the point is a macro probably isn't appropriate for this type of
>>>> thing. My understanding is that you should never use a macro if you can
>>>> easily write an equivalent function.
>>>>
>>>> Cheers,
>>>>
>>>> Tom
>>>>
>>>> On Thursday, 28 May 2015 23:26:39 UTC+10, Mauro wrote:
>>>>>
>>>>> Like this:
>>>>>
>>>>> julia> macro gf(n)
>>>>> quote
>>>>> function $(esc(n))()
>>>>> 1
>>>>> end
>>>>> end
>>>>> end
>>>>>
>>>>> julia> @gf foo
>>>>> foo (generic function with 1 method)
>>>>>
>>>>> julia> foo()
>>>>> 1
>>>>>
>>>>> On Thu, 2015-05-28 at 12:06, Vasudha Khandelwal <
>>>>> vasudhakh...@gmail.com> wrote:
>>>>> > Can I use macros to generate functions with names passed as argument
>>>>> to the
>>>>> > macro?
>>>>>
>>>>>
