OCaml compiler library : Pprintast

`sig
type space_formatter = (unit, Stdlib.Format.formatter, unit) Stdlib.format
val longident : Stdlib.Format.formatter -> Longident.t -> unit
val constr : Stdlib.Format.formatter -> Longident.t -> unit
val expression : Stdlib.Format.formatter -> Parsetree.expression -> unit
val string_of_expression : Parsetree.expression -> string
val pattern : Stdlib.Format.formatter -> Parsetree.pattern -> unit
val core_type : Stdlib.Format.formatter -> Parsetree.core_type -> unit
val signature : Stdlib.Format.formatter -> Parsetree.signature -> unit
val structure : Stdlib.Format.formatter -> Parsetree.structure -> unit
val string_of_structure : Parsetree.structure -> string
val module_expr : Stdlib.Format.formatter -> Parsetree.module_expr -> unit
val toplevel_phrase :
Stdlib.Format.formatter -> Parsetree.toplevel_phrase -> unit
val top_phrase :
Stdlib.Format.formatter -> Parsetree.toplevel_phrase -> unit
val class_field : Stdlib.Format.formatter -> Parsetree.class_field -> unit
val class_type_field :
Stdlib.Format.formatter -> Parsetree.class_type_field -> unit
val class_expr : Stdlib.Format.formatter -> Parsetree.class_expr -> unit
val class_type : Stdlib.Format.formatter -> Parsetree.class_type -> unit
val module_type : Stdlib.Format.formatter -> Parsetree.module_type -> unit
val structure_item :
Stdlib.Format.formatter -> Parsetree.structure_item -> unit
val signature_item :
Stdlib.Format.formatter -> Parsetree.signature_item -> unit
val binding : Stdlib.Format.formatter -> Parsetree.value_binding -> unit
val payload : Stdlib.Format.formatter -> Parsetree.payload -> unit
val tyvar_of_name : string -> string
val tyvar : Stdlib.Format.formatter -> string -> unit
module Doc :
sig
val longident : Longident.t Format_doc.printer
val constr : Longident.t Format_doc.printer
val tyvar : string Format_doc.printer
val nominal_exp : Parsetree.expression -> Format_doc.t option
end
end`