Do not generate evalName when parent's is null

Force vscode to use value in copy value in watch, instead of evaluating the evalName. (We can't use watch expr as evalName directly because they might contains hint or command.)

Author: yuxiaomao

src/HLAdapter.hx

@@ -802,7 +802,7 @@ class HLAdapter extends DebugSession {
 				for( f in fields ) {
 					try {
 						var value = dbg.eval.readField(v, f);
-						vars.push(makeVar(f, value, evalName+"."+f));
+						vars.push(makeVar(f, value, evalName == null ? null : evalName+"."+f));
 					} catch( e : Dynamic ) {
 						vars.push({
 							name : f,
@@ -817,7 +817,7 @@ class HLAdapter extends DebugSession {
 				for( i in start...start+count ) {
 					try {
 						var value = get(i);
-						vars.push(makeVar("" + i, value, evalName+"["+i+"]"));
+						vars.push(makeVar("" + i, value, evalName == null ? null : evalName+"["+i+"]"));
 					} catch( e : Dynamic ) {
 						vars.push({
 							name : "" + i,
@@ -898,7 +898,7 @@ class HLAdapter extends DebugSession {
 				for( f in fields )
 					try {
 						var value = dbg.eval.readField(v, f.name);
-						vars.push(makeVar(f.name, value, evalName+"."+f.name));
+						vars.push(makeVar(f.name, value, evalName == null ? null : evalName+"."+f.name));
 					} catch( e : Dynamic ) {
 						vars.push({
 							name : f.name,