initial checkin of SkSL compiler

src/sksl/ast/SkSLASTParameter.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_ASTPARAMETER
+#define SKSL_ASTPARAMETER
+
+#include "SkSLASTModifiers.h"
+#include "SkSLASTType.h"
+
+namespace SkSL {
+
+/**
+ * A declaration of a parameter, as part of a function declaration.
+ */
+struct ASTParameter : public ASTPositionNode {
+    // 'sizes' is a list of the array sizes appearing on a parameter, in source order. 
+    // e.g. int x[3][1] would have sizes [3, 1].
+    ASTParameter(Position position, ASTModifiers modifiers, std::unique_ptr<ASTType> type, 
+                 std::string name, std::vector<int> sizes)
+    : INHERITED(position)
+    , fModifiers(modifiers)
+    , fType(std::move(type))
+    , fName(std::move(name))
+    , fSizes(std::move(sizes)) {}
+
+    std::string description() const override {
+        std::string result = fModifiers.description() + fType->description() + " " + fName;
+        for (int size : fSizes) {
+            result += "[" + to_string(size) + "]";
+        }
+        return result;
+    }
+
+    const ASTModifiers fModifiers;
+    const std::unique_ptr<ASTType> fType;
+    const std::string fName;
+    const std::vector<int> fSizes;
+
+    typedef ASTPositionNode INHERITED;
+};
+
+} // namespace
+
+#endif