# Static fieldnames

**URL:** <https://discourse.julialang.org/t/static-fieldnames/5619>\
**Category:** General Usage\
**Created:** [August 28, 2017, 8:10pm UTC](https://discourse.julialang.org/t/static-fieldnames/5619 "2017-08-28T20:10:54Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![yuyichao](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/yuyichao/32/20_2.png) [@yuyichao](https://discourse.julialang.org/u/yuyichao)\
**Post date:** [August 28, 2017, 8:33pm UTC](https://discourse.julialang.org/t/static-fieldnames/5619/2 "2017-08-28T20:33:51Z")

</div>

```julia
julia> @generated f(obj) = :(string($((:(getfield(obj, $i)) for i in 1:fieldcount(obj))...)))
f (generic function with 1 method)

julia> f(1im)
"01"

julia> f((1, 2, 2.4))
"122.4"

julia> @code_warntype f(1im)
Variables:
  #self# <optimized out>
  obj::Complex{Int64}

Body:
  begin
      #= REPL[4]:1 =#
      # meta: location REPL[4] @generated body
      return $(Expr(:invoke, MethodInstance for #print_to_string#245(::Void, ::Function, ::Int64, ::Vararg{Int64,N} where N), :(Base.#print_to_string#245), :($(QuoteNode(nothing))), :($(QuoteNode(Base.print_to_string))), :((Main.getfield)(obj, 1)::Int64), :((Main.getfield)(obj, 2)::Int64)))::String
      # meta: pop location
  end::String

julia> @code_warntype f((1, 2, "", 3))
Variables:
  #self# <optimized out>
  obj::Tuple{Int64,Int64,String,Int64}

Body:
  begin
      #= REPL[4]:1 =#
      # meta: location REPL[4] @generated body
      return $(Expr(:invoke, MethodInstance for #print_to_string#245(::Void, ::Function, ::Int64, ::Vararg{Any,N} where N), :(Base.#print_to_string#245), :($(QuoteNode(nothing))), :($(QuoteNode(Base.print_to_string))), :((Main.getfield)(obj, 1)::Int64), :((Main.getfield)(obj, 2)::Int64), :((Main.getfield)(obj, 3)::String), :((Main.getfield)(obj, 4)::Int64)))::String
      # meta: pop location
  end::String

```

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