One way of doing this would be to generate named functions that do a
particular formatting, e.g. when someone does printf("%5.2d %-s %73f\n",
...) do
@eval function $(symbol("__printf__%5.2d %-s %73f\n"))(arg1, arg2, arg3)
# generate code here
end
Then call that function. That uses the module as a lookup table.
Unfortunately, there's still overhead to lookup the function – using a hash
table might be more efficient anyway. Honestly, the whole printf way of
doing formatting is kind of a horrid hack and should probably be replaced
with something saner.
On Thu, Dec 4, 2014 at 9:24 AM, Tony Fong <tony.hf.f...@gmail.com> wrote:
> That's exactly the approach in the c-style portion of Formatting.jl.
>
> On Thursday, December 4, 2014 8:49:15 PM UTC+7, Ivar Nesje wrote:
>>
>> A function wrapping Julia @sprintf will be typesafe, but will have
>> terrible performance. One could cache the generated functions though, so
>> that the format string will only be used as a lookup in a hash table that
>> points to the specialized (typesafe) function for that format string.
>>
>
