[cpp] Fix interface casting for cppia. Do not inline native functions on cppia. Export IMap interface

gencpp.ml

@@ -4603,6 +4603,7 @@ type cppia_op =
    | IaNoMain
    | IaResources
    | IaReso
+   | IaNoCast
 
 	| IaBinOp of Ast.binop
 ;;
@@ -4685,7 +4686,7 @@ let cppia_op_info = function
    | IaNoMain -> ("NOMAIN", 76)
    | IaResources -> ("RESOURCES", 77)
    | IaReso -> ("RESO", 78)
-
+	| IaNoCast -> ("NOCAST", 79)
 
 	| IaBinOp OpAdd -> ("+", 101)
 	| IaBinOp OpMult -> ("*", 102)
@@ -4954,8 +4955,13 @@ class script_writer common_ctx ctx filename asciiOut =
 
    if (not was_cast) then begin
       if (forceCast) then begin
-         let toType = (type_string expr.etype) in
-         this#writeOpLine (if toType="int" then IaCastInt else if toType=="bool" then IaCastBool else IaCast);
+         let op =match (type_string expr.etype) with
+         | "int" -> IaCastInt
+         | "bool" -> IaCastBool
+         | _ when is_interface_type toType -> IaNoCast
+         | _ -> IaCast
+         in
+         this#writeOpLine op;
       end;
       this#gen_expression expr;
    end

std/haxe/io/Bytes.hx

@@ -213,7 +213,7 @@ class Bytes {
 		Returns the IEEE double precision value at given position (in low endian encoding).
 		Result is unspecified if reading outside of the bounds
 	**/
-	#if (neko_v21 || cpp) inline #end
+	#if (neko_v21 || (cpp && !cppia)) inline #end
 	public function getDouble( pos : Int ) : Float {
 		#if neko_v21
 		return untyped $sgetd(b, pos, false);
@@ -232,7 +232,7 @@ class Bytes {
 		Returns the IEEE single precision value at given position (in low endian encoding).
 		Result is unspecified if reading outside of the bounds
 	**/
-	#if (neko_v21 || cpp) inline #end
+	#if (neko_v21 || (cpp && !cppia)) inline #end
 	public function getFloat( pos : Int ) : Float {
 		#if neko_v21
 		return untyped $sgetf(b, pos, false);

tests/unit/compile-cppia-host.hxml

@@ -1,6 +1,6 @@
 -main cpp.cppia.Host
 -D scriptable
--D dll_export=""
+-D dll_export=
 -debug
 -dce no
 -cpp bin/cppia