initial checkin of SkSL compiler

src/sksl/ir/SkSLTypeReference.h

+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+ 
+#ifndef SKSL_TYPEREFERENCE
+#define SKSL_TYPEREFERENCE
+
+#include "SkSLExpression.h"
+
+namespace SkSL {
+
+/**
+ * Represents an identifier referring to a type. This is an intermediate value: TypeReferences are 
+ * always eventually replaced by Constructors in valid programs.
+ */
+struct TypeReference : public Expression {
+    TypeReference(Position position, std::shared_ptr<Type> type)
+    : INHERITED(position, kTypeReference_Kind, kInvalid_Type)
+    , fValue(type) {}

[dogben, 2016/06/22 17:43:58]

nit: std::move

+
+    virtual std::string description() const override {

[dogben, 2016/06/22 17:43:58]

nit: remove virtual

+        ASSERT(false);
+        return "<type>";
+    }
+
+    const std::shared_ptr<Type> fValue;
+
+    typedef Expression INHERITED;
+};
+
+} // namespace
+
+#endif