REPL: tab completion for non-struct types (JuliaLang#41679)

stdlib/REPL/src/REPLCompletions.jl

@@ -144,7 +144,7 @@ function complete_symbol(sym::String, ffunc, context_module::Module=Main)
             if isa(b, Module)
                 mod = b
                 lookup_module = true
-            elseif Base.isstructtype(typeof(b))
+            else
                 lookup_module = false
                 t = typeof(b)
             end

stdlib/REPL/test/replcompletions.jl

@@ -32,6 +32,10 @@ let ex = quote
             :()
         end
 
+        primitive type NonStruct 8 end
+        Base.propertynames(::NonStruct) = (:a, :b, :c)
+        x = reinterpret(NonStruct, 0x00)
+
         # Support non-Dict AbstractDicts, #19441
         mutable struct CustomDict{K, V} <: AbstractDict{K, V}
             mydict::Dict{K, V}
@@ -1145,6 +1149,11 @@ let s = "test_dict[\"ab"
     @test c == Any["\"abc\"", "\"abcd\""]
 end
 
+let s = "CompletionFoo.x."
+    c, r = test_complete(s)
+    @test "a" in c
+end
+
 # https://github.com/JuliaLang/julia/issues/27184
 let
     (test_complete("@noexist."); @test true)