Support direct breakpointing in atsign-interpret

The commented-out tests cause a weird breakage of Test.

Author: timholy

src/JuliaInterpreter.jl

@@ -1119,6 +1119,10 @@ macro interpret(arg)
         if frame === nothing
             return eval(Expr(:call, map(QuoteNode, theargs)...))
         end
+        if shouldbreak(frame, 1)
+            push!(stack, frame)
+            return stack, BreakpointRef(frame.code, 1)
+        end
         finish_and_return!(stack, frame)
     end
 end

test/breakpoints.jl

@@ -74,6 +74,15 @@ end
     @test isa(bp, Breakpoints.BreakpointRef)
     @test JuliaInterpreter.finish_stack!(stack) == 2
 
+    # Direct return
+    @breakpoint gcd(1,1) a==5
+    @test @interpret(gcd(10,20)) == 10
+    # FIXME: even though they pass, these tests break Test!
+    # stack, bp = @interpret gcd(5, 20)
+    # @test length(stack) == 1 && isa(stack[1], JuliaStackFrame)
+    # @test isa(bp, Breakpoints.BreakpointRef)
+    remove()
+
     # break on error
     inner(x) = error("oops")
     outer() = inner(1)

test/toplevel.jl

@@ -195,6 +195,7 @@ module Toplevel end
     @test @interpret(Toplevel.paramtype(Vector)) == Toplevel.NoParam
     @test @interpret(Toplevel.Inner.g()) == 5
     @test @interpret(Toplevel.Inner.InnerInner.g()) == 6
+    # FIXME: even though they pass, these tests break Test!
     # @test @interpret(isdefined(Toplevel, :Beat))
     # @test @interpret(Toplevel.Beat <: Toplevel.DatesMod.Period)