c++: Starting the json codec impl

.nix/derivation.nix

@@ -1,5 +1,5 @@
 { lib
-, stdenv
+, stdenvNoCC
 , zlib
 , fetchFromGitHub
 , scons
@@ -9,14 +9,14 @@
 , gnutls
 }:
 
-stdenv.mkDerivation {
+stdenvNoCC.mkDerivation {
   pname = "forstio";
   version = "0.0.0";
 
   nativeBuildInputs = [
     scons
-    clang_12
-    clang-tools
+    clang_15
+    clang-tools_15
   ];
 
   buildInputs = [

source/forstio/codec/json.cpp

@@ -0,0 +1,17 @@
+#include "json.h"
+
+
+
+namespace saw {
+
+class json_codec::impl {
+	public:
+		
+};
+
+json_codec::json_codec():
+  impl_{heap<json_codec::impl>()}
+	  {}
+
+json_codec::~json_codec(){}
+}

source/forstio/codec/json.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include "common.h"
+
+namespace saw {
+class json_codec {
+public:
+	struct limits {
+		size_t depth = 8;
+		size_t length = 2048;
+	};
+
+	json_codec();
+	~json_codec();
+
+	template<class Schema, class Container>
+	error encode(typename message<Schema, Container>::reader reader, buffer& buffer);
+
+	template<class Schema, class Container>
+	error decode(typename message<Schema, Container>::builder builder, buffer& buffer, const limits& lim = limits{});
+private:
+	class impl;
+	own<impl> impl_;
+};
+}