There isn't any special syntax for listing some of the type's fields, but you might be able to pull it off with some metaprogramming.
setdiff(names(Point), [:x]) will give you the leftover fields to use as default. You might be able to write a macro you could insert into the constructor call to copy all the other fields given that list as input. On Monday, December 8, 2014 12:15:23 PM UTC-5, Utkarsh Upadhyay wrote: > > I have just tried playing with Julia and I find myself often copying > `immutable` objects while changing just one field: > > function setX(pt::Point, x::Float64) > # Only changing the `x` field > return Point(x, pt.y, pt.z, pt.color, pt.collision, pt.foo, pt.bar); > end > > Is there is any syntactical sugar to avoid having to write out all the > other fields which are not changing (e.g. pt.y, pt.z, etc.) while creating > a new object? > Apart from making the function much easier to understand, this will also > make it much less of a hassle to change fields on the type. > > Thanks. >
