initial checkin of SkSL compiler

src/sksl/ast/SkSLASTParameter.h

Index: src/sksl/ast/SkSLASTParameter.h
diff --git a/src/sksl/ast/SkSLASTParameter.h b/src/sksl/ast/SkSLASTParameter.h
new file mode 100644
index 0000000000000000000000000000000000000000..f3f333a53aded5df094692bf9ec1fb6dcb856499
--- /dev/null
+++ b/src/sksl/ast/SkSLASTParameter.h
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+/*
+ * 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(name)
+    , fSizes(sizes) {}
+
+    std::string description() const override {
+        return fModifiers.description() + fType->description() + " " + fName;
+    }
+
+    const ASTModifiers fModifiers;
+    const std::unique_ptr<ASTType> fType;
+    const std::string fName;
+    const std::vector<int> fSizes;
+
+    typedef ASTPositionNode INHERITED;
+};
+
+} // namespace
+
+#endif