Just to be clear: I’m aware that there’s probably no way to get this
working with e.g. any string variable. But I don’t see a reason why it
shouldn’t be possible when passing a constant, or especially a literal
constant, to the macro, such as with @foo("bar") (rather than bar="bar";
@foo(bar), which I understand might be impossible).
// T
On Thursday, June 26, 2014 11:54:55 PM UTC+2, Tomas Lycken wrote:
This gets me quite far - thanks a lot! However, to make it work, I have to
> hard-code the value of datafile, since I can’t figure out how to get the
> macro to create the string "$datafile.jld" correctly. This is probably OK
> for my use case - I only have two datafiles, so I can create two macros :P
> But it would be nice to learn how to do it, if it’s possible.
>
> Basically, is there a way to make the following work?
>
> @macro foo(bar)
> esc(quote
> "$bar.baz"
> end)
> end
>
> Currently @foo("fizz") is just the string literal "$bar.baz".
>
> // T
>
> On Thursday, June 26, 2014 9:25:18 PM UTC+2, Mauro wrote:
>
> Maybe something like this should work:
>>
>> julia> macro A()
>> esc(quote
>> a=5
>> b=7
>> end)
>> end
>>
>> julia> function f(x)
>> @A
>> x+a+b
>> end
>> f (generic function with 1 method)
>>
>> julia> f(5)
>> 17
>>
>> If you don't want your variable names to be mangled then do the `esc`.
>>
>> So, basically just write normal code in the `esc(quote ... end)` bit.
>>
>> On Thu, 2014-06-26 at 19:21, [email protected] wrote:
>> > That explains it, thanks.
>> >
>> > In my actual problem, what I wanted to do in the included file was
>> > something like this:
>> >
>> > ```
>> > sall,sloops,slost,Nbins,psibins,initialhist,finalhist,vols =
>> > jldopen("$datafile.jld") do f
>> > read(f, "sall"),
>> > read(f, "sloops"),
>> > read(f, "sloss"),
>> > read(f, "Nbins"),
>> > read(f, "psibins"),
>> > read(f, "initialhist"),
>> > read(f, "finalhist"),
>> > read(f, "vols")
>> > end
>> > ```
>> >
>> > where `datafile` is the variable defined in the function. In other
>> words,
>> > including the file would define and assign to all those variables. Is
>> it
>> > maybe possible to write a macro that does this?
>> >
>> > // T
>> >
>> > On Thursday, June 26, 2014 8:17:29 PM UTC+2, Simon Kornblith wrote:
>> >>
>> >> include evaluates at top-level, so this would only work if foo were a
>> >> global variable. It not possible to include in a function context for
>> the
>> >> same reason it is not possible to eval in a function context.
>> >>
>> >> Simon
>> >>
>> >> On Thursday, June 26, 2014 1:03:00 PM UTC-4, Tomas Lycken wrote:
>> >>>
>> >>> I have the following two files:
>> >>>
>> >>> *includetest1.jl*:
>> >>>
>> >>> module IncludeTest
>> >>>
>> >>> function testinclude()
>> >>> foo = "foo"
>> >>> println(foo)
>> >>> include("includetest2.jl")
>> >>> end
>> >>>
>> >>> end
>> >>>
>> >>> *includetest2.jl*
>> >>>
>> >>> println(foo)
>> >>>
>> >>> If I now try to execute this the function from the REPL, I get errors
>> >>> stating that foo is not defined:
>> >>>
>> >>> julia> include("includetest1.jl")
>> >>>
>> >>> julia> IncludeTest.testinclude()
>> >>> foo
>> >>> ERROR: foo not defined
>> >>> in include at boot.jl:244
>> >>> while loading [...]/includetest2.jl, in expression starting on line 1
>> >>>
>> >>> I thought include was supposed to just insert the contents of the
>> file
>> >>> in whatever context you’re in? If include is not the way to do this,
>> is
>> >>> there another?
>> >>>
>> >>> For completeness:
>> >>>
>> >>>
>> >>> julia> versioninfo()
>> >>> Julia Version 0.3.0-prerelease+3884
>> >>> Commit 3e6a6c7* (2014-06-25 10:41 UTC)
>> >>> Platform Info:
>> >>> System: Linux (x86_64-linux-gnu)
>> >>> CPU: Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz
>> >>> WORD_SIZE: 64
>> >>> BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY)
>> >>> LAPACK: libopenblas
>> >>> LIBM: libopenlibm
>> >>>
>> >>> // T
>> >>>
>> >>>
>> >>
>>
>> --
>>
>>
>
