let cores define versions

Author: MESYETI

source/app.d

@@ -377,6 +377,7 @@ int main(string[] args) {
 	}
 
 	auto preproc        = new Preprocessor();
+	preproc.disabled    = disabled;
 	preproc.includeDirs = includeDirs;
 	preproc.versions    = versions;
 

source/backends/arm64.d

@@ -106,12 +106,11 @@ class BackendARM64 : CompilerBackend {
 		// OS features
 		switch (os) {
 			case "linux": {
-				ret ~= ["Linux", "IO", "File", "Args", "Time", "Heap", "Exit"];
+				ret ~= ["Linux"];
 				break;
 			}
 			case "osx": {
-				ret ~= ["OSX", "IO", "File", "Args", "Time", "Exit"];
-				if (useLibc) ret ~= "Heap";
+				ret ~= ["OSX"];
 				break;
 			}
 			default: break;

source/preprocessor.d

@@ -14,7 +14,8 @@ class Preprocessor {
 	string[] includeDirs;
 	string[] included;
 	string[] versions;
-	string[] restricted = ["IO", "File", "Time", "Exit"];
+	string[] restricted;
+	string[] disabled;
 	bool     success = true;
 
 	final void Error(Char, A...)(ErrorInfo error, in Char[] fmt, A args) {
@@ -89,6 +90,8 @@ class Preprocessor {
 						);
 					}
 
+					if (disabled.canFind(node.ver)) break;
+
 					if (!versions.canFind(node.ver)) {
 						versions ~= node.ver;
 					}
@@ -97,12 +100,6 @@ class Preprocessor {
 				case NodeType.Restrict: {
 					auto node = cast(RestrictNode) inode;
 
-					if (versions.canFind(node.ver)) {
-						Error(
-							node.error, "Restricted version '%s' is enabled", node.ver
-						);
-					}
-
 					restricted ~= node.ver;
 					break;
 				}