diff --git a/hscript/Expr.hx b/hscript/Expr.hx
index f949fb9..42536d3 100644
--- a/hscript/Expr.hx
+++ b/hscript/Expr.hx
@@ -40,6 +40,7 @@ typedef Expr = {
 }
 enum ExprDef {
 #else
+typedef ExprDef = Expr;
 enum Expr {
 #end
 	EConst( c : Const );
diff --git a/hscript/Interp.hx b/hscript/Interp.hx
index b8a81c4..4468257 100644
--- a/hscript/Interp.hx
+++ b/hscript/Interp.hx
@@ -122,7 +122,7 @@ class Interp {
 
 	function assign( e1 : Expr, e2 : Expr ) : Dynamic {
 		var v = expr(e2);
-		switch( edef(e1) ) {
+		switch( Tools.expr(e1) ) {
 		case EIdent(id):
 			var l = locals.get(id);
 			if( l == null )
@@ -154,7 +154,7 @@ class Interp {
 
 	function evalAssignOp(op,fop,e1,e2) : Dynamic {
 		var v;
-		switch( edef(e1) ) {
+		switch( Tools.expr(e1) ) {
 		case EIdent(id):
 			var l = locals.get(id);
 			v = fop(expr(e1),expr(e2));
@@ -280,14 +280,6 @@ class Interp {
 		}
 	}
 
-	inline function edef( e : Expr ) {
-		#if hscriptPos
-		return e.e;
-		#else
-		return e;
-		#end
-	}
-
 	inline function error(e : #if hscriptPos ErrorDef #else Error #end, rethrow=false ) : Dynamic {
 		#if hscriptPos var e = new Error(e, curExpr.pmin, curExpr.pmax, curExpr.origin, curExpr.line); #end
 		if( rethrow ) this.rethrow(e) else throw e;
@@ -372,7 +364,7 @@ class Interp {
 			for( p in params )
 				args.push(expr(p));
 
-			switch( edef(e) ) {
+			switch( Tools.expr(e) ) {
 			case EField(e,f):
 				var obj = expr(e);
 				if( obj == null ) error(EInvalidAccess(f));
@@ -468,7 +460,7 @@ class Interp {
 			}
 			return f;
 		case EArrayDecl(arr):
-			if (arr.length > 0 && edef(arr[0]).match(EBinop("=>", _))) {
+			if (arr.length > 0 && Tools.expr(arr[0]).match(EBinop("=>", _))) {
 				var isAllString:Bool = true;
 				var isAllInt:Bool = true;
 				var isAllObject:Bool = true;
@@ -476,7 +468,7 @@ class Interp {
 				var keys:Array<Dynamic> = [];
 				var values:Array<Dynamic> = [];
 				for (e in arr) {
-					switch(edef(e)) {
+					switch(Tools.expr(e)) {
 						case EBinop("=>", eKey, eValue): {
 							var key:Dynamic = expr(eKey);
 							var value:Dynamic = expr(eValue);
diff --git a/hscript/Tools.hx b/hscript/Tools.hx
index c1b554a..77a8699 100644
--- a/hscript/Tools.hx
+++ b/hscript/Tools.hx
@@ -25,7 +25,7 @@ import hscript.Expr;
 class Tools {
 
 	public static function iter( e : Expr, f : Expr -> Void ) {
-		switch( #if hscriptPos e.e #else e #end ) {
+		switch( expr(e) ) {
 		case EConst(_), EIdent(_):
 		case EVar(_, _, e): if( e != null ) f(e);
 		case EParent(e): f(e);
@@ -61,12 +61,8 @@ class Tools {
 	}
 
 	public static function map( e : Expr, f : Expr -> Expr ) {
-		#if hscriptPos
 		var edef = switch( e.e ) {
-		#else
-		return switch( e ) {
-		#end
-		case EConst(_), EIdent(_), EBreak, EContinue: #if hscriptPos e.e #else e #end;
+		case EConst(_), EIdent(_), EBreak, EContinue: expr(e);
 		case EVar(n, t, e): EVar(n, t, if( e != null ) f(e) else null);
 		case EParent(e): EParent(f(e));
 		case EBlock(el): EBlock([for( e in el ) f(e)]);
@@ -91,8 +87,22 @@ class Tools {
 		case EMeta(name, args, e): EMeta(name, args == null ? null : [for( a in args ) f(a)], f(e));
 		case ECheckType(e,t): ECheckType(f(e), t);
 		}
+		return mk(edef, e);
+	}
+
+	public static inline function expr( e : Expr ) : ExprDef {
 		#if hscriptPos
-		return { e : edef, pmin : e.pmin, pmax : e.pmax, origin : e.origin, line : e.line };
+		return e.e;
+		#else
+		return e;
+		#end
+	}
+
+	public static inline function mk( e : ExprDef, p : Expr ) {
+		#if hscriptPos
+		return { e : e, pmin : p.pmin, pmax : p.pmax, origin : p.origin, line : p.line };
+		#else
+		return e;
 		#end
 	}