Add project files.

2026-07-27 13:13:29 -07:00 · 2022-03-03 08:14:05 -06:00
parent cfa6f93211
commit 1198cc8a66
967 changed files with 118389 additions and 0 deletions
@@ -0,0 +1,60 @@
+// Decompiled with JetBrains decompiler
+// Type: Microsoft.Iris.Markup.Validation.ValidateExpressionNullCoalescing
+// Assembly: UIX, Version=4.8.0.0, Culture=neutral, PublicKeyToken=ddd0da4d3e678217
+// MVID: A56C6C9D-B7F6-46A9-8BDE-B3D9B8D60B11
+// Assembly location: C:\Program Files\Zune\UIX.dll
+
+using Microsoft.Iris.Markup.UIX;
+
+namespace Microsoft.Iris.Markup.Validation
+{
+    internal class ValidateExpressionNullCoalescing : ValidateExpression
+    {
+        private ValidateExpression _condition;
+        private ValidateExpression _nullClause;
+
+        public ValidateExpressionNullCoalescing(
+          SourceMarkupLoader owner,
+          ValidateExpression condition,
+          ValidateExpression nullClause,
+          int line,
+          int column)
+          : base(owner, line, column, ExpressionType.NullCoalescing)
+        {
+            _condition = condition;
+            _nullClause = nullClause;
+        }
+
+        public ValidateExpression Condition => _condition;
+
+        public ValidateExpression NullClause => _nullClause;
+
+        public override void Validate(TypeRestriction typeRestriction, ValidateContext context)
+        {
+            if (Usage == ExpressionUsage.LValue)
+                ReportError("Expression cannot be used as the target an assignment (related symbol: '{0}')", "Null coalescing");
+            _condition.Validate(typeRestriction, context);
+            if (_condition.HasErrors)
+                MarkHasErrors();
+            if (_condition.ObjectType != null)
+                DeclareEvaluationType(_condition.ObjectType, typeRestriction);
+            _nullClause.Validate(typeRestriction, context);
+            if (_condition.HasErrors)
+                MarkHasErrors();
+            if (_condition.ObjectType == null || _nullClause.ObjectType == null)
+                return;
+            if (_condition.ObjectType == NullSchema.Type)
+            {
+                ReportError("Null constant may not be used as the condition for ?? operator");
+            }
+            else
+            {
+                if (!_condition.ObjectType.IsNullAssignable)
+                    ReportError("The {0} operator must be used with a reference type ('{1}' is not null assignable)", "??", _condition.ObjectType.Name);
+                if (_condition.ObjectType.IsAssignableFrom(_nullClause.ObjectType))
+                    return;
+                ReportError("Both expressions for the {0} operator must match: '{1}' and '{2}' are not compatible", "??", _condition.ObjectType.Name, _nullClause.ObjectType.Name);
+            }
+        }
+    }
+}