Ppx_apply (melange.Melange_ppx_lib.Ppx

val apply_lazy : 
  source:string ->
  target:string ->
  (Melange_compiler_libs.Parsetree.structure ->
    Melange_compiler_libs.Parsetree.structure) ->
  (Melange_compiler_libs.Parsetree.signature ->
    Melange_compiler_libs.Parsetree.signature) ->
  unit