initial checkin of SkSL compiler

src/sksl/ast/SkSLASTType.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_ASTTYPE
+#define SKSL_ASTTYPE
+
+namespace SkSL {
+
+/**
+ * A type, such as 'int' or 'struct foo { ... }'.

[dogben, 2016/06/20 16:23:18]

Is this abstract? I don't quite see how it can represent structs.

[ethannicholas, 2016/06/20 17:45:49]

The comment was slightly inaccurate -- it doesn't represent the full structure,
rather just the "struct foo" part. The rest is represented in a Type.

+ */
+struct ASTType : public ASTPositionNode {
+    enum Kind {
+        kIdentifier_Kind,
+        kStruct_Kind
+    };
+
+    ASTType(Position position, std::string name, Kind kind)
+    : INHERITED(position)
+    , fName(name)
+    , fKind(kind) {}
+
+    std::string description() const override {
+        return fName;
+    }
+
+    const std::string fName;
+
+    const Kind fKind;
+
+    typedef ASTPositionNode INHERITED;
+};
+
+} // namespace
+
+#endif