Fix field visibility in objectHas for extended objects (#737)

builtins.go

@@ -1224,7 +1224,10 @@ func builtinObjectHasEx(i *interpreter, objv value, fnamev value, includeHiddenV
 		return nil, err
 	}
 	h := withHiddenFromBool(includeHidden.value)
-	hasField := objectHasField(objectBinding(obj), string(fname.getRunes()), h)
+
+	hide, hasField := objectFieldsVisibility(obj)[string(fname.getRunes())]
+	hasField = hasField && (h == withHidden || hide != ast.ObjectFieldHidden)
+
 	return makeValueBoolean(hasField), nil
 }
 

interpreter.go

@@ -585,7 +585,7 @@ func (i *interpreter) rawevaluate(a ast.Node, tc tailCallStatus) (value, error)
 		if err != nil {
 			return nil, err
 		}
-		hasField := objectHasField(i.stack.getSelfBinding().super(), indexStr.getGoString(), withHidden)
+		hasField := objectHasField(i.stack.getSelfBinding().super(), indexStr.getGoString())
 		return makeValueBoolean(hasField), nil
 
 	case *ast.Function:

testdata/std.objectHasEx5.golden

@@ -0,0 +1 @@
+false

testdata/std.objectHasEx5.jsonnet

@@ -0,0 +1 @@
+std.objectHasEx({"x":: null} + {"x": null}, "x", false)

testdata/stdlib_smoke_test.golden

@@ -88,6 +88,8 @@
    "format": "test blah 42",
    "get": [
       17,
+      42,
+      18,
       42
    ],
    "isArray": true,

testdata/stdlib_smoke_test.jsonnet

@@ -26,6 +26,8 @@
     get: [
         std.get(o={a:: 17}, f="a"),
         std.get(o={a:: 17}, f="a", default=42, inc_hidden=false),
+        std.get(o={a:: 17} + {a: 18}, f="a", default=42),
+        std.get(o={a:: 17} + {a: 18}, f="a", default=42, inc_hidden=false),
     ],
 
     // isSomething

thunks.go

@@ -150,7 +150,7 @@ func (f *plusSuperUnboundField) evaluate(i *interpreter, sb selfBinding, origBin
 		return nil, err
 	}
 
-	if !objectHasField(sb.super(), fieldName, withHidden) {
+	if !objectHasField(sb.super(), fieldName) {
 		return right, nil
 	}
 

value.go

@@ -730,12 +730,9 @@ func objectIndex(i *interpreter, sb selfBinding, fieldName string) (value, error
 	return val, err
 }
 
-func objectHasField(sb selfBinding, fieldName string, h hidden) bool {
-	found, field, _, _, _ := findField(sb.self.uncached, sb.superDepth, fieldName)
-	if !found || (h == withoutHidden && field.hide == ast.ObjectFieldHidden) {
-		return false
-	}
-	return true
+func objectHasField(sb selfBinding, fieldName string) bool {
+	found, _, _, _, _ := findField(sb.self.uncached, sb.superDepth, fieldName)
+	return found
 }
 
 type fieldHideMap map[string]ast.ObjectFieldHide