[scripting] more parenthesis handling improvements

UnityScript2CSharp.Tests/TestSubjects.cs

@@ -2,6 +2,13 @@ using System;
 
 namespace UnityScript2CSharp.Tests
 {
+    public class C
+    {
+        public static int staticField;
+        public static int staticMethod() { return 1; }
+        public int instanceMethod() { return 1; }
+    }
+
     public struct Other
     {
         public string value;

UnityScript2CSharp.Tests/Tests.cs

@@ -65,6 +65,19 @@ namespace UnityScript2CSharp.Tests
             AssertConversion(sources, expectedConverted);
         }
 
+        [TestCase("o.staticField = 1;", "C.staticField = 1;")]
+        [TestCase("var i = o.staticField + 1;", "int i = C.staticField + 1;")]
+        [TestCase("var i = o.staticField + o.staticMethod();", "int i = C.staticField + C.staticMethod();")]
+        [TestCase("o.staticMethod();", "C.staticMethod();")]
+        [TestCase("C.staticMethod();", "C.staticMethod();")] // Proof that static references through a type ref are not affected
+        public void Static_Members_Through_Instance_Are_Updated(string usSnippet, string csSnippet)
+        {
+            SourceFile[] sources = { new SourceFile("static_member.js", $"import UnityScript2CSharp.Tests; function F(o:C) {{ {usSnippet} return 1; }}") };
+            SourceFile[] expectedConverted = { new SourceFile("static_member.cs", "using UnityScript2CSharp.Tests; " + DefaultGeneratedClass + $"static_member : MonoBehaviour {{ public virtual int F(C o) {{ {csSnippet} return 1; }} }}") };
+
+            AssertConversion(sources, expectedConverted);
+        }
+
         [Test]
         public void Additional_Imports()
         {

UnityScript2CSharp/Extensions/ASTNodeExtensions.cs

@@ -1,4 +1,5 @@
-using Boo.Lang.Compiler.Ast;
+using System.Linq;
+using Boo.Lang.Compiler.Ast;
 using Boo.Lang.Compiler.TypeSystem;
 
 namespace UnityScript2CSharp.Extensions
@@ -10,7 +11,7 @@ namespace UnityScript2CSharp.Extensions
             if (node.NodeType != NodeType.MethodInvocationExpression)
                 return false;
 
-            var invocation = (MethodInvocationExpression) node;
+            var invocation = (MethodInvocationExpression)node;
             return invocation.Target.Entity != null && invocation.Target.Entity.EntityType == EntityType.Constructor;
         }
 
@@ -19,10 +20,15 @@ namespace UnityScript2CSharp.Extensions
             if (node.NodeType != NodeType.GenericReferenceExpression)
                 return false;
 
-            var gre = (GenericReferenceExpression) node;
+            var gre = (GenericReferenceExpression)node;
             // Arrays in UnityScript are represented as a GenericReferenceExpession
             var target = gre.Target as ReferenceExpression;
             return target != null && target.Name == "array";
         }
+
+        public static bool NeedsQualificationFor(this Node node, INamespace ns)
+        {
+            return node.GetAncestors<Import>().Any(imp => imp.Namespace == ns.FullName);
+        }
     }
 }

UnityScript2CSharp/Steps/InstanceToTypeReferencedStaticMemberReference.cs

@@ -0,0 +1,24 @@
+using Boo.Lang.Compiler.Ast;
+using Boo.Lang.Compiler.Steps;
+using Boo.Lang.Compiler.TypeSystem;
+using UnityScript2CSharp.Extensions;
+
+namespace UnityScript2CSharp.Steps
+{
+    class InstanceToTypeReferencedStaticMemberReference : AbstractTransformerCompilerStep
+    {
+        public override void OnMemberReferenceExpression(MemberReferenceExpression node)
+        {
+            IMember member = node.Entity as IMember;
+            if (member != null && member.IsStatic && node.Target.Entity.EntityType != EntityType.Type)
+            {
+                var declaringType = node.Target.ExpressionType;
+                var needsQualification = node.NeedsQualificationFor(declaringType.ParentNamespace);
+
+                node.Replace(node.Target, new ReferenceExpression(needsQualification ? declaringType.FullName : declaringType.Name));
+            }
+
+            base.OnMemberReferenceExpression(node);
+        }
+    }
+}

UnityScript2CSharp/UnityScript2CSharp.csproj

@@ -113,6 +113,7 @@
     <Compile Include="Steps\ApplyEnumToImplicitConversions.cs" />
     <Compile Include="Steps\ExpandAssignmentToValueTypeMembers.cs" />
     <Compile Include="Steps\InferredMethodReturnTypeFix.cs" />
+    <Compile Include="Steps\InstanceToTypeReferencedStaticMemberReference.cs" />
     <Compile Include="Steps\PromoteImplicitBooleanConversionsToExplicitComparisons.cs" />
     <Compile Include="Steps\InjectTypeOfExpressionsInArgumentsOfSystemType.cs" />
     <Compile Include="Program.cs" />

UnityScript2CSharp/UnityScript2CSharpConverter.cs

@@ -135,6 +135,7 @@ namespace UnityScript2CSharp
 
             adjustedPipeline.Add(new ReplaceGetSetItemMethodsWithOriginalIndexers());
             adjustedPipeline.Add(new PromoteImplicitBooleanConversionsToExplicitComparisons());
+            adjustedPipeline.Add(new InstanceToTypeReferencedStaticMemberReference());
 
             _compiler.Parameters.Pipeline = adjustedPipeline;
         }

UnityScript2CSharp/UnityScript2CSharpConverterVisitor.cs

@@ -606,21 +606,21 @@ namespace UnityScript2CSharp
         public override void OnBinaryExpression(BinaryExpression node)
         {
             WrapWith(NeedParensAround(node), "(", ")", delegate()
-            {
-                var isDeclarationStatement = node.Operator == BinaryOperatorType.Assign &&
-                                             node.Left.NodeType == NodeType.ReferenceExpression && node.IsSynthetic;
-
-                if (isDeclarationStatement)
                 {
-                    var localDeclaration = (InternalLocal) node.Left.Entity;
-                    localDeclaration.OriginalDeclaration.Type.Accept(this);
-                    _writer.Write(" ");
-                }
+                    var isDeclarationStatement = node.Operator == BinaryOperatorType.Assign &&
+                        node.Left.NodeType == NodeType.ReferenceExpression && node.IsSynthetic;
 
-                node.Left.Accept(this);
-                _writer.Write($" {CSharpOperatorFor(node.Operator)} ");
-                node.Right.Accept(this);
-            });
+                    if (isDeclarationStatement)
+                    {
+                        var localDeclaration = (InternalLocal)node.Left.Entity;
+                        localDeclaration.OriginalDeclaration.Type.Accept(this);
+                        _writer.Write(" ");
+                    }
+
+                    node.Left.Accept(this);
+                    _writer.Write($" {CSharpOperatorFor(node.Operator)} ");
+                    node.Right.Accept(this);
+                });
         }
 
         public override void OnConditionalExpression(ConditionalExpression node)
@@ -629,13 +629,13 @@ namespace UnityScript2CSharp
             var needsParens = parent != null && (parent.Right != node || parent.Operator != BinaryOperatorType.Assign);
 
             WrapWith(needsParens , "(", ")", delegate
-            {
-                node.Condition.Accept(this);
-                _writer.Write(" ? ");
-                VisitWrapping(node.TrueValue, node.TrueValue.NodeType == NodeType.ConditionalExpression, "(", ")");
-                _writer.Write(" : ");
-                VisitWrapping(node.FalseValue, node.FalseValue.NodeType == NodeType.ConditionalExpression, "(", ")");
-            });
+                {
+                    node.Condition.Accept(this);
+                    _writer.Write(" ? ");
+                    VisitWrapping(node.TrueValue, node.TrueValue.NodeType == NodeType.ConditionalExpression, "(", ")");
+                    _writer.Write(" : ");
+                    VisitWrapping(node.FalseValue, node.FalseValue.NodeType == NodeType.ConditionalExpression, "(", ")");
+                });
         }
 
         public override void OnReferenceExpression(ReferenceExpression node)
@@ -843,7 +843,6 @@ namespace UnityScript2CSharp
 
         public override void OnTryCastExpression(TryCastExpression node)
         {
-            var mre = node.ParentNode as MemberReferenceExpression;
             var isTargetOfMemberReferenceExpression = NeedParensAround(node);
 
             VisitWrapping(node.Target, isTargetOfMemberReferenceExpression, "(");
@@ -853,19 +852,13 @@ namespace UnityScript2CSharp
 
         public override void OnCastExpression(CastExpression node)
         {
-            var mre = node.ParentNode as TryCastExpression;
-            var isTargetOfExpression = mre != null && mre.Target == node;
-
-            if (isTargetOfExpression)
-                _writer.Write("(");
-
-            _writer.Write("(");
-            node.Type.Accept(this);
-            _writer.Write(") ");
-            node.Target.Accept(this);
-
-            if (isTargetOfExpression)
-                _writer.Write(")");
+            WrapWith(NeedParensAround(node), "(", ")", delegate
+                {
+                    _writer.Write("(");
+                    node.Type.Accept(this);
+                    _writer.Write(") ");
+                    node.Target.Accept(this);
+                });
         }
 
         public override void OnTypeofExpression(TypeofExpression node)
@@ -1085,25 +1078,28 @@ namespace UnityScript2CSharp
 
             switch (nodeParent.NodeType)
             {
-                case NodeType.ExpressionStatement:
-                case NodeType.MacroStatement:
                 case NodeType.IfStatement:
                 case NodeType.WhileStatement:
                 case NodeType.UnlessStatement:
+                    return ((ConditionalStatement)nodeParent).Condition != e;
+
+                case NodeType.ExpressionStatement:
+                case NodeType.MacroStatement:
                     return false;
 
                 case NodeType.MethodInvocationExpression:
-                    return ((MethodInvocationExpression) nodeParent).Arguments.Any(a => a == e);
+                    return !((MethodInvocationExpression)nodeParent).Arguments.Any(a => a == e);
 
                 case NodeType.BinaryExpression:
-                    return ((BinaryExpression) nodeParent).Right != e;
+                    return ((BinaryExpression)nodeParent).Right != e;
 
                 case NodeType.ReturnStatement:
-                    return ((ReturnStatement) nodeParent).Expression != e;
+                    return ((ReturnStatement)nodeParent).Expression != e;
 
                 case NodeType.ConditionalExpression:
                     return nodeParent.ParentNode.NodeType == NodeType.BinaryExpression && ((BinaryExpression)nodeParent.ParentNode).Operator != BinaryOperatorType.Assign;
             }
+
             return true;
         }