@SVector & @MVector fail when their inputs use non global scope variables

[dpinol]

This works

       tmp=[1,2]
       @SVector [1 for i in 1:length(tmp)]

but this does not work

function g()
       tmp2=[1,2]
       @SVector [1 for i in 1:length(tmp2)]
end
g()

ERROR: LoadError: UndefVarError: tmp2 not defined
Stacktrace:
 [1] top-level scope
   @ none:1
 [2] eval(m::Module, e::Any)
   @ Core ./boot.jl:368
 [3] var"@SVector"(__source__::LineNumberNode, __module__::Module, ex::Any)
   @ StaticArrays ~/.julia/packages/StaticArrays/0bweZ/src/SVector.jl:60
in expression starting at REPL[2]:3

The problem is the following line in the macros will not access non global scope variables.

rng = Core.eval(__module__, ex.args[2].args[2])

[martinholters]

The argument to @SVector is evaluated at macro expansion time. And that is necessary to have the size available at compilation time. So I don't think there is much to be done here, except better documentation maybe. E.g. try

tmp2=[1,2]
function g()
    @SVector [1 for i in 1:length(tmp2)]
end
tmp2="Hello world!"
g()

[dpinol]

hi, thanks. Yes, since it's a limitation of the macro, a better documentation will be appreciated by users.