# Documenting Fields of Parametric Type
**URL:** https://discourse.julialang.org/t/documenting-fields-of-parametric-type/15760
**Category:** General Usage
**Tags:** parametric-types
**Created:** [October 1, 2018, 9:31pm UTC](https://discourse.julialang.org/t/documenting-fields-of-parametric-type/15760 "2018-10-01T21:31:36Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@JaredCrean2](https://discourse.julialang.org/u/JaredCrean2)
#### Post date: [October 1, 2018, 9:31pm UTC](https://discourse.julialang.org/t/documenting-fields-of-parametric-type/15760/1 "2018-10-01T21:31:36Z")
I am having trouble documenting the fields of a parametric type, but not of a non-parametric type. Example:
```julia
"""
This is struct Foo
"""
struct Foo{T}
"""
This is field x
"""
x
end
"""
This is struct Bar
"""
struct Bar
"""
This is field x
"""
x
end
```
If this code is in file `tmp4.jl`, then in the repl I can get documentation for `Bar.x` but not `Foo.x` or `Foo{Float64}.x`:
```julia
julia> include("tmp4.jl")
Bar
help?> Foo
search: floor pointer_from_objref OverflowError RoundFromZero FileMonitor functionloc StackOverflowError
This is struct Foo
help?> Foo{Float64}.x
ERROR: MethodError: no method matching Base.Docs.Binding(::Type{Foo{Float64}}, ::Symbol)
Closest candidates are:
Base.Docs.Binding(::Module, ::Symbol) at docs/bindings.jl:12
help?> Foo.x
ERROR: MethodError: no method matching Base.Docs.Binding(::Type{Foo}, ::Symbol)
Closest candidates are:
Base.Docs.Binding(::Module, ::Symbol) at docs/bindings.jl:12
help?> Bar
search: baremodule SubArray GlobalRef BitArray clipboard backtrace BitMatrix takebuf_array catch_backtrace
This is struct Bar
help?> Bar.x
```
Did I do something wrong with the documentation, or is this a bug? The output is from julia 0.6, and is similar on 1.0
---
### Author:  [@mauro3](https://discourse.julialang.org/u/mauro3)
#### Post date: [October 2, 2018, 5:12am UTC](https://discourse.julialang.org/t/documenting-fields-of-parametric-type/15760/2 "2018-10-02T05:12:06Z")
I think this is a bug.
---
### Author:  [@JaredCrean2](https://discourse.julialang.org/u/JaredCrean2)
#### Post date: [October 2, 2018, 1:43pm UTC](https://discourse.julialang.org/t/documenting-fields-of-parametric-type/15760/3 "2018-10-02T13:43:45Z")
Filed issue: [https://github.com/JuliaLang/julia/issues/29478](https://github.com/JuliaLang/julia/issues/29478)