Use hscript to manage ?.

include revert of eb4605a

.github/workflows/main.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Install haxelib dependencies
       run: |
         haxelib git format https://github.com/HaxeFoundation/format.git
-        haxelib install hscript
+        haxelib git hscript https://github.com/HaxeFoundation/hscript.git
         haxelib install vshaxe
         haxelib install vscode
         haxelib install vscode-debugadapter

README.md

@@ -18,8 +18,8 @@ Additionally, you need to install these dependencies:
 haxelib install vshaxe
 haxelib install vscode
 haxelib install vscode-debugadapter
-haxelib install hscript
-haxelib install format
+haxelib git hscript https://github.com/HaxeFoundation/hscript.git
+haxelib git format https://github.com/HaxeFoundation/format.git
 ```
 
 You will need [NodeJS](https://nodejs.org/en/download), if you would like to compile vscode extension or use commandline nodejs version.

hld/Eval.hx

@@ -237,8 +237,18 @@ class Eval {
 			}
 		case EBlock(el):
 			var v : Value = { v : VNull, t : HDyn };
-			for( e in el )
-				v = evalExpr(e);
+			switch(el) {
+			case [EVar(id,_,e), ETernary(EBinop("==",EIdent(id2),EIdent("null")), EIdent("null"), EField(EIdent(id3),f))] if ( id == id2 && id == id3 ):
+				// Special case for e?.field
+				var ve : Value = evalExpr(e);
+				if( compare(ve, v) != 0 ) {
+					v = readField(ve, f);
+					if( v == null ) throw valueStr(ve)+" has no field "+f;
+				}
+			default:
+				for( e in el )
+					v = evalExpr(e);
+			}
 			return v;
 		case EField(e, f):
 			var e = e;

src/HLAdapter.hx

@@ -948,8 +948,6 @@ class HLAdapter extends DebugSession {
 			// ?ident => hover on optional param (most likely)
 			if( ~/^\?[A-Za-z0-9_]+$/.match(args.expression) )
 				args.expression = args.expression.substr(1);
-			// ?. => likely null safe field access, replace to .
-			args.expression = StringTools.replace(args.expression, "?.", ".");
 			if( KEYWORDS.exists(args.expression) ) {
 				// Do nothing
 			} else {