I have something that this in C++ I would write like
double f(double x){
// do something with x
#ifdef MACROVAR
// do something else with x
#endif
return(x)
}
I was trying to understand how i could use julia macro's to achieve
something similar. I have seen how the Logging.jl uses macros to this end,
at least that's how I understand
it: https://github.com/kmsquire/Logging.jl/blob/master/src/logging_macros.jl
. However I'm a bit unclear as to how to use this in my case. in my case,
the condition of whether or not to insert a piece of code is stored in a
custom type. Here is what I tried:
# simplified type:
type Param
nD_rent :: Int
end
# macro:
macro add_buy(p::Param)
quote
if $(esc(p.nD_rent)) > 4
# insert some additional code
println("here comes additional code")
println(typeof(p))
else
println(typeof(p))
:nothing
end
end
end
*julia> **bk.@add_buy(p)*
*ERROR: MethodError: no method matching @add_buy(::Symbol)*
Closest candidates are:
@add_buy(*::bk.Param*) at
/Users/florian.oswald/git/bk/bk.jl/src/solver.jl:641
so, I have a type `Param`, and depending on the value in field nD_rent, I
would like to insert that code or not. thanks for any suggestions.
