Add usings to names in REPL completions.

[NHDaly]

Add usings to names in REPL completions.

Follow up to #42092, rest of #36529.

This enables the REPL to use the names imported via usings in completions.

[NHDaly]

Actually, @aviatesk - i'm not sure if this PR is right... Can you expand on what you meant in your comment?:
#36529 (comment)

What are situations that don't work like you expect, and how would you want them to change?

I'm going to downgrade this PR to a draft, since i'm not sure what the desired behavior actually is... please feel free to commit directly to the PR and change it however you'd like!! 😁

[aviatesk]

Thanks for taking the initiative on this @NHDaly !
I added several test cases that can benefit from your PR #42092, all of which should not work on master. I hope they explain the possible improvements.

[ViralBShah]

Merge?

[vtjnash]

Do these not show up via usings=true normally? I guess I don't really know how names works

[vtjnash]

Note that this doesn't merge into master, but into that other PR (which should be merged first instead)

[aviatesk]

• closes REPL shell completion fail to detect imported symbol #49109
• closes Autocompletion after selective using #53524

[KnutAM]

I was about to open an issue, but I guess this falls under the same?

module A
    module B
        struct C end
    end
end
julia> import .A.B.<tab>┌ Error: Error in the keymap
│   exception =
│    UndefVarError: `out` not defined
│    Stacktrace:

(Works fine on 1.9 though)

Full stack trace and versioninfo

julia> import .A.B.┌ Error: Error in the keymap
│   exception =
│    UndefVarError: `out` not defined
│    Stacktrace:
│      [1] complete_identifiers!(suggestions::Vector{REPL.REPLCompletions.Completion}, ffunc::Any, context_module::Module, string::String, name::String, pos::Int64, dotpos::Int64, startpos::Int64; comp_keywords::Bool)
│        @ REPL.REPLCompletions C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\REPLCompletions.jl:1055
│      [2] complete_identifiers!
│        @ C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\REPLCompletions.jl:983 [inlined]
│      [3] completions(string::String, pos::Int64, context_module::Module, shift::Bool)
│        @ REPL.REPLCompletions C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\REPLCompletions.jl:1299
│      [4] complete_line(c::REPL.REPLCompletionProvider, s::REPL.LineEdit.PromptState, mod::Module)
│        @ REPL C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\REPL.jl:545
│      [5] complete_line(s::REPL.LineEdit.PromptState, repeats::Int64, mod::Module)
│        @ REPL.LineEdit C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\LineEdit.jl:376
│      [6] complete_line(s::REPL.LineEdit.MIState)
│        @ REPL.LineEdit C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\LineEdit.jl:367
│      [7] edit_tab(s::REPL.LineEdit.MIState, jump_spaces::Bool, delete_trailing::Bool)
│        @ REPL.LineEdit C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\LineEdit.jl:2320
│      [8] edit_tab
│        @ C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\LineEdit.jl:2320 [inlined]
│      [9] (::REPL.LineEdit.var"#114#170")(::REPL.LineEdit.MIState, ::Any, ::Vararg{Any})
│        @ REPL.LineEdit C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\LineEdit.jl:2366
│     [10] #invokelatest#2
│        @ .\essentials.jl:892 [inlined]
│     [11] invokelatest
│        @ .\essentials.jl:889 [inlined]
│     [12] (::REPL.LineEdit.var"#27#28"{REPL.LineEdit.var"#114#170", String})(s::Any, p::Any)
│        @ REPL.LineEdit C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\LineEdit.jl:1612
│     [13] prompt!(term::REPL.Terminals.TextTerminal, prompt::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
│        @ REPL.LineEdit C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\LineEdit.jl:2749
│     [14] run_interface(terminal::REPL.Terminals.TextTerminal, m::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
│        @ REPL.LineEdit C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\LineEdit.jl:2651
│     [15] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
│        @ REPL C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\REPL.jl:1312
│     [16] (::REPL.var"#62#68"{REPL.LineEditREPL, REPL.REPLBackendRef})()
│        @ REPL C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\REPL.jl:386
└ @ REPL.LineEdit C:\Users\meyer\.julia\juliaup\julia-1.10.1+0.x64.w64.mingw32\share\julia\stdlib\v1.10\REPL\src\LineEdit.jl:2751

# Versioninfo
Julia Version 1.10.1
Commit 7790d6f064 (2024-02-13 20:41 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: 8 × 11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-15.0.7 (ORCJIT, tigerlake)
Threads: 1 default, 0 interactive, 1 GC (on 8 virtual cores)
Environment:
  JULIA_PKG_OFFLINE = false
  JULIA_PKG_USE_CLI_GIT = true

[aviatesk]

That's a separate issue. We need to backport #53273 to v1.10.