Re: [julia-users] question: why no inarg specification in Julia

[ggggg]

For the best performance users are advised to write functions such that the 
return type is stable.  And the compiler reasons out the return type, so 
would it be possible to have a function like isstable(f::Function) that 
checks whether a method is actually type stable? Or returntype(f::Function) 
that returns a list of possible return types?