Support generated functions with kwargs

Fixes timholy/Revise.jl#290

Author: timholy

src/LoweredCodeUtils.jl

@@ -386,12 +386,30 @@ function methoddef!(@nospecialize(recurse), signatures, frame::Frame, @nospecial
     if isa(name, Bool)
         error("not valid for anonymous methods")
     end
+    if !define && String(name)[1] == '#'
+        # We will have to correct the name.
+        # We can only correct one at a time, so work backwards from a non-gensymmed name
+        # (https://github.com/timholy/Revise.jl/issues/290)
+        pc0 = pc
+        idx1 = findall(ismethod1, frame.framecode.src.code)
+        idx1 = idx1[idx1 .>= pc]
+        i = 1
+        while i < length(idx1) && startswith(String(pc_expr(frame, idx1[i]).args[1]), '#')
+            i += 1
+        end
+        while i > 2
+            i -= 1
+            frame.pc = idx1[i]
+            methoddef!(recurse, [], frame, frame.pc; define=define)
+        end
+        frame.pc = pc0
+    end
     parentname = get_parentname(name)  # e.g., name = #foo#7 and parentname = foo
     nextstmt = pc_expr(frame, pc+1)
     if ismethod1(nextstmt)
         name = nextstmt.args[1]
     end
-    if name != parentname
+    if name != parentname && !define
         name, endpc = correct_name!(recurse, frame, pc, name, parentname)
     end
     while true  # methods containing inner methods may need multiple trips through this loop

test/runtests.jl

@@ -56,6 +56,7 @@ bodymethtest5(x, y=Dict(1=>2)) = 5
                        end
                    end
                end,
+               :(@generated genkw(; b=2) = nothing),  # https://github.com/timholy/Revise.jl/issues/290
                # Generated constructors
                quote
                    function Gen{T}(x) where T
@@ -203,6 +204,12 @@ bodymethtest5(x, y=Dict(1=>2)) = 5
     methoddefs!(signatures, frame; define=true)
     @test length(signatures) == 5
     @test Lowering.another_kwdef(0) == 333
+    ex = :(@generated genkw2(; b=2) = nothing)  # https://github.com/timholy/Revise.jl/issues/290
+    frame = JuliaInterpreter.prepare_thunk(Lowering, ex)
+    empty!(signatures)
+    methoddefs!(signatures, frame; define=true)
+    @test length(signatures) == 4
+    @test Lowering.genkw2() === nothing
 
     # Test for correct exit (example from base/namedtuples.jl)
     ex = quote