NAME

       Ast_iterator  -  Ast_iterator.iterator  allows  to  implement  AST  inspection  using open
       recursion.

Module

       Module   Ast_iterator

Documentation

       Module Ast_iterator
        : sig end

       Ast_iterator.iterator allows to implement AST inspection using open recursion.  A  typical
       mapper would be based on Ast_iterator.default_iterator , a trivial iterator, and will fall
       back on it for handling the syntax it does not modify.

       === A generic Parsetree iterator ===

       type iterator = {
        attribute : iterator -> Parsetree.attribute -> unit ;
        attributes : iterator -> Parsetree.attribute list -> unit ;
        case : iterator -> Parsetree.case -> unit ;
        cases : iterator -> Parsetree.case list -> unit ;
        class_declaration : iterator -> Parsetree.class_declaration -> unit ;
        class_description : iterator -> Parsetree.class_description -> unit ;
        class_expr : iterator -> Parsetree.class_expr -> unit ;
        class_field : iterator -> Parsetree.class_field -> unit ;
        class_signature : iterator -> Parsetree.class_signature -> unit ;
        class_structure : iterator -> Parsetree.class_structure -> unit ;
        class_type : iterator -> Parsetree.class_type -> unit ;
        class_type_declaration : iterator -> Parsetree.class_type_declaration -> unit ;
        class_type_field : iterator -> Parsetree.class_type_field -> unit ;
        constructor_declaration : iterator -> Parsetree.constructor_declaration -> unit ;
        expr : iterator -> Parsetree.expression -> unit ;
        extension : iterator -> Parsetree.extension -> unit ;
        extension_constructor : iterator -> Parsetree.extension_constructor -> unit ;
        include_declaration : iterator -> Parsetree.include_declaration -> unit ;
        include_description : iterator -> Parsetree.include_description -> unit ;
        label_declaration : iterator -> Parsetree.label_declaration -> unit ;
        location : iterator -> Location.t -> unit ;
        module_binding : iterator -> Parsetree.module_binding -> unit ;
        module_declaration : iterator -> Parsetree.module_declaration -> unit ;
        module_expr : iterator -> Parsetree.module_expr -> unit ;
        module_type : iterator -> Parsetree.module_type -> unit ;
        module_type_declaration : iterator -> Parsetree.module_type_declaration -> unit ;
        open_description : iterator -> Parsetree.open_description -> unit ;
        pat : iterator -> Parsetree.pattern -> unit ;
        payload : iterator -> Parsetree.payload -> unit ;
        signature : iterator -> Parsetree.signature -> unit ;
        signature_item : iterator -> Parsetree.signature_item -> unit ;
        structure : iterator -> Parsetree.structure -> unit ;
        structure_item : iterator -> Parsetree.structure_item -> unit ;
        typ : iterator -> Parsetree.core_type -> unit ;
        type_declaration : iterator -> Parsetree.type_declaration -> unit ;
        type_extension : iterator -> Parsetree.type_extension -> unit ;
        type_kind : iterator -> Parsetree.type_kind -> unit ;
        value_binding : iterator -> Parsetree.value_binding -> unit ;
        value_description : iterator -> Parsetree.value_description -> unit ;
        with_constraint : iterator -> Parsetree.with_constraint -> unit ;
        }

       A iterator record implements one "method" per syntactic category, using an open  recursion
       style:  each  method takes as its first argument the iterator to be applied to children in
       the syntax tree.

       val default_iterator : iterator

       A default iterator, which implements a "do not do anything" mapping.