1 files changed, 91 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/compiler/preprocessor/MacroExpander.h b/gfx/angle/checkout/src/compiler/preprocessor/MacroExpander.h
new file mode 100644
index 0000000000..10aee6fc39
--- /dev/null
+++ b/gfx/angle/checkout/src/compiler/preprocessor/MacroExpander.h
@@ -0,0 +1,91 @@
+//
+// Copyright 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_MACROEXPANDER_H_
+#define COMPILER_PREPROCESSOR_MACROEXPANDER_H_
+
+#include <memory>
+#include <vector>
+
+#include "compiler/preprocessor/Lexer.h"
+#include "compiler/preprocessor/Macro.h"
+#include "compiler/preprocessor/Preprocessor.h"
+
+namespace angle
+{
+
+namespace pp
+{
+
+class Diagnostics;
+struct SourceLocation;
+
+class MacroExpander : public Lexer
+{
+  public:
+    MacroExpander(Lexer *lexer,
+                  MacroSet *macroSet,
+                  Diagnostics *diagnostics,
+                  const PreprocessorSettings &settings,
+                  bool parseDefined);
+    ~MacroExpander() override;
+
+    void lex(Token *token) override;
+
+  private:
+    void getToken(Token *token);
+    void ungetToken(const Token &token);
+    bool isNextTokenLeftParen();
+
+    bool pushMacro(std::shared_ptr<Macro> macro, const Token &identifier);
+    void popMacro();
+
+    bool expandMacro(const Macro &macro, const Token &identifier, std::vector<Token> *replacements);
+
+    typedef std::vector<Token> MacroArg;
+    bool collectMacroArgs(const Macro &macro,
+                          const Token &identifier,
+                          std::vector<MacroArg> *args,
+                          SourceLocation *closingParenthesisLocation);
+    void replaceMacroParams(const Macro &macro,
+                            const std::vector<MacroArg> &args,
+                            std::vector<Token> *replacements);
+
+    struct MacroContext
+    {
+        MacroContext();
+        ~MacroContext();
+        bool empty() const;
+        const Token &get();
+        void unget();
+
+        std::shared_ptr<Macro> macro;
+        std::size_t index;
+        std::vector<Token> replacements;
+    };
+
+    Lexer *mLexer;
+    MacroSet *mMacroSet;
+    Diagnostics *mDiagnostics;
+    bool mParseDefined;
+
+    std::unique_ptr<Token> mReserveToken;
+    std::vector<MacroContext *> mContextStack;
+    size_t mTotalTokensInContexts;
+
+    PreprocessorSettings mSettings;
+
+    bool mDeferReenablingMacros;
+    std::vector<std::shared_ptr<Macro>> mMacrosToReenable;
+
+    class ScopedMacroReenabler;
+};
+
+}  // namespace pp
+
+}  // namespace angle
+
+#endif  // COMPILER_PREPROCESSOR_MACROEXPANDER_H_