initial checkin of SkSL compiler

src/sksl/ir/SkSLTypeReference.h

Index: src/sksl/ir/SkSLTypeReference.h
diff --git a/src/sksl/ir/SkSLTypeReference.h b/src/sksl/ir/SkSLTypeReference.h
new file mode 100644
index 0000000000000000000000000000000000000000..9c91daa56210fd0e51194193daac6c206310e3a3
--- /dev/null
+++ b/src/sksl/ir/SkSLTypeReference.h
@@ -0,0 +1,36 @@
+/*
+ * 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) {}
+
+    virtual std::string description() const override {
+    	ASSERT(false);
+    	return "<type>";
+    }
+
+    const std::shared_ptr<Type> fValue;
+
+    typedef Expression INHERITED;
+};
+
+} // namespace
+
+#endif