ppx_core
Ppx_core is a standard library for OCaml AST transformers. It
contains:
various auto-generated AST traversal using an open recursion scheme
helpers for building AST fragments
helpers for matching AST fragments
a framework for dealing with attributes and extension points
When used in combination with
ppx_driver, it features:
spellchecking and other hints on misspelled/misplaced attributes and
extension pointschecks for unused attributes (they are otherwise silently dropped by
the compiler)
Ast version
Ppx_core uses the specific version of the OCaml Abstract Syntax Tree
as defined by Ppx_ast.
Compatibility
If you want to write code that works with several versions of
Ppx_core using different AST versions, you can use the versionned
alternatives for Ast_builder
and Ast_pattern
. For instance:
open Ppx_core
module Ast_builder = Ast_builder_403
module Ast_pattern = Ast_pattern_403
>= "5.0.0" & < "5.0.3"
>= "1.3.0" & < "2.0.0"
< "0.8.1"
< "1.1.0"
< "0.2.1" | >= "0.4.2" & < "0.6.0"
< "3.1.3"