Remove restrictions on kwarg tab completion (#59692)

Co-authored-by: Jameson Nash <[email protected]>

Author: mbauman

stdlib/REPL/src/REPLCompletions.jl

@@ -901,12 +901,6 @@ function complete_keyword_argument!(suggestions::Vector{Completion},
     kwargs_flag == 2 && return false # one of the previous kwargs is invalid
 
     methods = Completion[]
-    # Limit kwarg completions to cases when function is concretely known; looking up
-    # matching methods for abstract functions — particularly `Any` or `Function` — can
-    # take many seconds to run over the thousands of possible methods. Note that
-    # isabstracttype would return naively return true for common constructor calls
-    # like Array, but the REPL's introspection here may know their Type{T}.
-    isconcretetype(funct) || return false
     complete_methods!(methods, funct, Any[Vararg{Any}], kwargs_ex, -1, arg_pos == :kwargs)
     # TODO: use args_ex instead of Any[Vararg{Any}] and only provide kwarg completion for
     # method calls compatible with the current arguments.

stdlib/REPL/test/replcompletions.jl

@@ -2688,8 +2688,54 @@ f54131 = F54131()
 
     s = "f54131.x(kwa"
     a, b, c = completions(s, lastindex(s), @__MODULE__, false)
-    @test_broken REPLCompletions.KeywordArgumentCompletion("kwarg") in a
-    @test (@elapsed completions(s, lastindex(s), @__MODULE__, false)) < 1
+    @test REPLCompletions.KeywordArgumentCompletion("kwarg") in a
+    @test (@elapsed completions(s, lastindex(s), @__MODULE__, false)) < 100
+end
+
+@kwdef struct T59244
+    asdf = 1
+    qwer = 2
+end
+@kwdef struct S59244{T}
+    asdf::T = 1
+    qwer::T = 2
+end
+@testset "kwarg completion of types" begin
+    s = "T59244(as"
+    a, b, c = completions(s, lastindex(s), @__MODULE__, #= shift =# false)
+    @test REPLCompletions.KeywordArgumentCompletion("asdf") in a
+
+    s = "T59244(; qw"
+    a, b, c = completions(s, lastindex(s), @__MODULE__, #= shift =# false)
+    @test REPLCompletions.KeywordArgumentCompletion("qwer") in a
+    @test REPLCompletions.KeywordArgumentCompletion("qwer") == only(a)
+
+    s = "S59244(as"
+    a, b, c = completions(s, lastindex(s), @__MODULE__, #= shift =# false)
+    @test REPLCompletions.KeywordArgumentCompletion("asdf") in a
+
+    s = "S59244(; qw"
+    a, b, c = completions(s, lastindex(s), @__MODULE__, #= shift =# false)
+    @test REPLCompletions.KeywordArgumentCompletion("qwer") in a
+    @test REPLCompletions.KeywordArgumentCompletion("qwer") == only(a)
+
+    s = "S59244{Int}(as"
+    a, b, c = completions(s, lastindex(s), @__MODULE__, #= shift =# false)
+    @test REPLCompletions.KeywordArgumentCompletion("asdf") in a
+
+    s = "S59244{Int}(; qw"
+    a, b, c = completions(s, lastindex(s), @__MODULE__, #= shift =# false)
+    @test REPLCompletions.KeywordArgumentCompletion("qwer") in a
+    @test REPLCompletions.KeywordArgumentCompletion("qwer") == only(a)
+
+    s = "S59244{Any}(as"
+    a, b, c = completions(s, lastindex(s), @__MODULE__, #= shift =# false)
+    @test REPLCompletions.KeywordArgumentCompletion("asdf") in a
+
+    s = "S59244{Any}(; qw"
+    a, b, c = completions(s, lastindex(s), @__MODULE__, #= shift =# false)
+    @test REPLCompletions.KeywordArgumentCompletion("qwer") in a
+    @test REPLCompletions.KeywordArgumentCompletion("qwer") == only(a)
 end
 
 # Completion inside string interpolation