1 files changed, 87 insertions, 0 deletions
diff --git a/src/deps/skia/include/private/SkSLStatement.h b/src/deps/skia/include/private/SkSLStatement.h
new file mode 100644
index 000000000..8913369e9
--- /dev/null
+++ b/src/deps/skia/include/private/SkSLStatement.h
@@ -0,0 +1,87 @@
+/*
+ * 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_STATEMENT
+#define SKSL_STATEMENT
+
+#include "include/private/SkSLIRNode.h"
+#include "include/private/SkSLSymbol.h"
+
+namespace SkSL {
+
+/**
+ * Abstract supertype of all statements.
+ */
+class Statement : public IRNode {
+public:
+    enum Kind {
+        kBlock = (int) Symbol::Kind::kLast + 1,
+        kBreak,
+        kContinue,
+        kDiscard,
+        kDo,
+        kExpression,
+        kFor,
+        kIf,
+        kInlineMarker,
+        kNop,
+        kReturn,
+        kSwitch,
+        kSwitchCase,
+        kVarDeclaration,
+
+        kFirst = kBlock,
+        kLast = kVarDeclaration,
+    };
+
+    Statement(int line, Kind kind)
+    : INHERITED(line, (int) kind) {
+        SkASSERT(kind >= Kind::kFirst && kind <= Kind::kLast);
+    }
+
+    Kind kind() const {
+        return (Kind) fKind;
+    }
+
+    /**
+     *  Use is<T> to check the type of a statement.
+     *  e.g. replace `s.kind() == Statement::Kind::kReturn` with `s.is<ReturnStatement>()`.
+     */
+    template <typename T>
+    bool is() const {
+        return this->fKind == T::kStatementKind;
+    }
+
+    /**
+     *  Use as<T> to downcast statements.
+     *  e.g. replace `(ReturnStatement&) s` with `s.as<ReturnStatement>()`.
+     */
+    template <typename T>
+    const T& as() const {
+        SkASSERT(this->is<T>());
+        return static_cast<const T&>(*this);
+    }
+
+    template <typename T>
+    T& as() {
+        SkASSERT(this->is<T>());
+        return static_cast<T&>(*this);
+    }
+
+    virtual bool isEmpty() const {
+        return false;
+    }
+
+    virtual std::unique_ptr<Statement> clone() const = 0;
+
+private:
+    using INHERITED = IRNode;
+};
+
+}  // namespace SkSL
+
+#endif