https://issues.dlang.org/show_bug.cgi?id=16655 --- Comment #2 from Nick Treleaven <nick at geany.org> --- BTW parameter names aren't needed because the lambdas are used for Algebraic().visit!Lambdas: http://forum.dlang.org/post/pggfdcttxdpernjbxkdg@forum.dlang.org --