Thanks for this - very helpful.
Just to clarify what you mean by "exactly equivalent" is that while the AST
may be different, the LLVM generated is identical. Interestingly all the
above (including f(i)=i appear to be const).
So it was the anonymous nature of the function that causes the differences
in LLVM. @Jake: that's why I was getting different results. From my
original post:
julia> f = i->i
(anonymous function)
julia> [f(x) for x in [1,2,3]]
3-element Array{*Any*,1}:
1
2
3
julia> function fn(i)
i
end
fn (generic function with 1 method)
julia> [fn(x) for x in [1,2,3]]
3-element Array{*Int64*,1}:
1
2
3
The difference is that the first instance was using anonymous function,
while the second a named one. Anonymous functions seem to have issues
preserving type information, even when provably const - but @Jake was still
right the first case was a global variable and therefore that was my first
problem.
Hope my embarrassment (somewhat rehashed issue) is of some value to someone.
Regards, Fil.
