initial checkin of SkSL compiler

src/sksl/ast/SkSLASTSuffixExpression.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_ASTSUFFIXEXPRESSION
+#define SKSL_ASTSUFFIXEXPRESSION
+
+#include "SkSLASTSuffix.h"
+#include "SkSLASTExpression.h"
+
+namespace SkSL {
+
+/**
+ * An expression with an associated suffix.
+ */
+struct ASTSuffixExpression : public ASTExpression {
+    ASTSuffixExpression(std::unique_ptr<ASTExpression> base, std::unique_ptr<ASTSuffix> suffix)
+    : INHERITED(base->fPosition, kSuffix_Kind)
+    , fBase(std::move(base))
+    , fSuffix(std::move(suffix)) {}
+
+    std::string description() const override {
+        return fBase->description() + fSuffix->description();
+    }
+
+    const std::unique_ptr<ASTExpression> fBase;
+    const std::unique_ptr<ASTSuffix> fSuffix;
+
+    typedef ASTExpression INHERITED;
+};
+
+} // namespace
+
+#endif