Skip to content

Help mode's field access hints are strange #51180

Open

Description

I don't really see a pattern of when the REPL provides useful hints on this sort of field access and when it throws what appears to be an internal error:

julia> module M
           struct T 
               "a field with a docstring"
               my_field
           end
           const C = T
           f() = T
       end
WARNING: replacing module M.
Main.M

help?> M.T.field
  Main.M.T has fields my_field.

help?> M.C.field
  Main.M.T has fields my_field.

help?> M.f().field
ERROR: MethodError: no method matching Base.Docs.Binding(::Type{Main.M.T}, ::Symbol)

Closest candidates are:
  Base.Docs.Binding(::Module, ::Symbol)
   @ Base docs/bindings.jl:9

Stacktrace:
 [1] top-level scope
   @ none:1

help?> M.T(1).field
ERROR: MethodError: no method matching Base.Docs.Binding(::Main.M.T, ::Symbol)

Closest candidates are:
  Base.Docs.Binding(::Module, ::Symbol)
   @ Base docs/bindings.jl:9

Stacktrace:
 [1] top-level scope
   @ none:1

help?> M.T(1).my_field
ERROR: MethodError: no method matching Base.Docs.Binding(::Main.M.T, ::Symbol)

Closest candidates are:
  Base.Docs.Binding(::Module, ::Symbol)
   @ Base docs/bindings.jl:9

Stacktrace:
 [1] top-level scope
   @ none:1

julia> x = M.T(1)
Main.M.T(1)

help?> x.field
ERROR: MethodError: no method matching Base.Docs.Binding(::Main.M.T, ::Symbol)

Closest candidates are:
  Base.Docs.Binding(::Module, ::Symbol)
   @ Base docs/bindings.jl:9

Stacktrace:
 [1] top-level scope
   @ ~/.julia/juliaup/julia-1.10.0-beta2+0.aarch64.apple.darwin14/share/julia/stdlib/v1.10/REPL/src/docview.jl:558
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Assignees

No one assigned

    Labels

    REPLJulia's REPL (Read Eval Print Loop)bugIndicates an unexpected problem or unintended behaviordocsystemThe documentation building system

    Type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions