Replace camlp5 with ppx_parser (#11860)

* Use ppx_parser instead of camlp5

* Port camlp5 parser to ppx_parser

* Add git url for ppx_parser

* Replace instances of Stream.Error ""

ppx_parser's default message is "Parse error."

* Remove unnecessarily added match expression

This previously did not have a match expression and it is not necessary

* remove some [%s s] noise

---------

Co-authored-by: Simon Krajewski <[email protected]>

haxe.opam

@@ -19,19 +19,22 @@ build: [
 install: [make "install" "INSTALL_DIR=%{prefix}%"]
 remove: [make "uninstall" "INSTALL_DIR=%{prefix}%"]
 depends: [
-  ("ocaml" {>= "5.0"} & ("camlp5" {build}))
-    | ("ocaml" {>= "4.08" & < "5.0"} & ("camlp5" {build & = "8.00.03"}))
+  "ocaml"
   "ocamlfind" {build}
   "dune" {>= "1.11" & < "3.16"}
   "sedlex" {>= "2.0"}
   "xml-light"
   "extlib" {>= "1.7.8"}
   "sha"
   "camlp-streams"
+  "ppx_parser"
   "conf-libpcre2-8"
   "conf-zlib"
   "conf-neko"
   "luv" {>= "0.5.13"}
   "ipaddr"
   "terminal_size"
 ]
+pin-depends: [
+  ["ppx_parser.dev" "git+https://github.com/tobil4sk/ppx_parser#relax-ocaml-constraint"]
+]

src/dune

@@ -26,6 +26,7 @@
 	(modules (:standard \ haxe))
 	(preprocess (per_module
 		((pps sedlex.ppx) json lexer)
+		((pps ppx_parser) grammar)
 	))
 	(wrapped false)
 )