Update DLR

eng/scripts/generate_casts.py

@@ -82,7 +82,7 @@ def mark_cls_compliance(cw, t):
 def generate_type_cast(cw, t):
     mark_cls_compliance(cw, t)
     cw.enter_block("public static %(type)s ExplicitCastTo%(type)s(object o)", type = t)
-    cw.enter_block("if (o != null)")
+    cw.enter_block("if (o is not null)")
     cw.write("Type type = o.GetType();");
 
     cond = cw.conditions()
@@ -112,7 +112,7 @@ def generate_type_cast(cw, t):
 def generate_nullable_type_cast(cw, t):
     mark_cls_compliance(cw, t)
     cw.enter_block("public static Nullable<%(type)s> ExplicitCastToNullable%(type)s(object o)", type = t)
-    cw.enter_block("if (o == null)")
+    cw.enter_block("if (o is null)")
     cw.write("return new Nullable<%(type)s>();", type = t);
     cw.exit_block()
     cw.write("Type type = o.GetType();");

eng/scripts/generate_comdispatch.py

@@ -187,7 +187,7 @@ def gen_exposed_code_security(cw):
                 "return null;"
         ],
         setStatements=[
-                "if (value != null) {",
+                "if (value is not null) {",
                 "    Marshal.GetNativeVariantForObject(value, UnsafeMethods.ConvertVariantByrefToPtr(ref this));",
                 "}"
         ],
@@ -202,7 +202,7 @@ def gen_exposed_code_security(cw):
                 "return null;"
         ],
         setStatements=[
-                "if (value != null) {",
+                "if (value is not null) {",
                 "    _typeUnion._unionTypes._unknown = Marshal.GetIUnknownForObject(value);",
                 "}"
         ],
@@ -217,7 +217,7 @@ def gen_exposed_code_security(cw):
                 "return null;"
         ],
         setStatements=[
-                "if (value != null) {",
+                "if (value is not null) {",
                 "    _typeUnion._unionTypes._unknown = GetIDispatchForObject(value);",
                 "}"
         ],

eng/scripts/generate_dynamic_instructions.py

@@ -116,7 +116,7 @@ def gen_run_method(cw, n, is_void):
                                                 types, 
                                                 ','.join(param_names)))
 
-    cw.enter_block('if (_compiled != null || TryGetCompiled())')
+    cw.enter_block('if (_compiled is not null || TryGetCompiled())')
     args = ', '.join(['arg%d' % i for i in range(n)])
     if is_void:
         cw.write('((Action%s)_compiled)(%s);' % (types, args))

eng/scripts/generate_reflected_calls.py

@@ -26,7 +26,7 @@ def get_func_type_names(i):
     return get_type_names(i - 1) + ['TRet']
 
 def get_cast_args(i):
-    return ['%s != null ? (%s)%s : default(%s)' % (x[0], x[1], x[0], x[1]) for x in zip(get_args(i), get_type_names(i))]
+    return ['%s is not null ? (%s)%s : default(%s)' % (x[0], x[1], x[0], x[1]) for x in zip(get_args(i), get_type_names(i))]
 
 def get_type_params(i):
     if i == 0: return ''
@@ -84,7 +84,7 @@ def gen_fast_creation(cw):
         cw.enter_block('private static CallInstruction FastCreate%s(MethodInfo target, ParameterInfo[] pi)' % get_type_params(i))
 
         cw.write('Type t = TryGetParameterOrReturnType(target, pi, %d);' % (i, ))
-        cw.enter_block('if (t == null)')
+        cw.enter_block('if (t is null)')
 
         typeArgs = ', '.join(get_type_names(i))
         if i == 0: