intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 99 insertions, 0 deletions

diff --git a/library/cpp/cppparser/parser.h b/library/cpp/cppparser/parser.h
new file mode 100644
index 0000000000..f3e4bcbadd
--- /dev/null
+++ b/library/cpp/cppparser/parser.h
@@ -0,0 +1,99 @@
+#pragma once
+
+#include <util/generic/ptr.h>
+#include <util/generic/string.h>
+#include <util/stream/output.h>
+
+class TCppSaxParser: public IOutputStream {
+public:
+    struct TText {
+        TText();
+        TText(ui64 offset);
+        TText(const TString& data, ui64 offset);
+        ~TText();
+
+        void Reset() noexcept;
+
+        TString Data;
+        ui64 Offset;
+    };
+
+    class TWorker {
+    public:
+        typedef TCppSaxParser::TText TText;
+
+        TWorker() noexcept;
+        virtual ~TWorker();
+
+        virtual void DoEnd() = 0;
+        virtual void DoStart() = 0;
+        virtual void DoString(const TText& text) = 0;
+        virtual void DoCharacter(const TText& text) = 0;
+        virtual void DoCode(const TText& text) = 0;
+        virtual void DoOneLineComment(const TText& text) = 0;
+        virtual void DoMultiLineComment(const TText& text) = 0;
+        virtual void DoPreprocessor(const TText& text) = 0;
+    };
+
+    TCppSaxParser(TWorker* worker);
+    ~TCppSaxParser() override;
+
+private:
+    void DoWrite(const void* data, size_t len) override;
+    void DoFinish() override;
+
+private:
+    class TImpl;
+    THolder<TImpl> Impl_;
+};
+
+class TCppSimpleSax: public TCppSaxParser::TWorker {
+public:
+    TCppSimpleSax() noexcept;
+    ~TCppSimpleSax() override;
+
+    void DoEnd() override = 0;
+    void DoStart() override = 0;
+    void DoString(const TText& text) override = 0;
+    void DoCharacter(const TText& text) override = 0;
+    virtual void DoWhiteSpace(const TText& text) = 0;
+    virtual void DoIdentifier(const TText& text) = 0;
+    virtual void DoSyntax(const TText& text) = 0;
+    void DoOneLineComment(const TText& text) override = 0;
+    void DoMultiLineComment(const TText& text) override = 0;
+    void DoPreprocessor(const TText& text) override = 0;
+
+private:
+    void DoCode(const TText& text) override;
+};
+
+class TCppFullSax: public TCppSimpleSax {
+public:
+    TCppFullSax();
+    ~TCppFullSax() override;
+
+    void DoEnd() override;
+    void DoStart() override;
+    void DoString(const TText& text) override;
+    void DoCharacter(const TText& text) override;
+    void DoWhiteSpace(const TText& text) override;
+    virtual void DoKeyword(const TText& text);
+    virtual void DoName(const TText& text);
+    virtual void DoOctNumber(const TText& text);
+    virtual void DoHexNumber(const TText& text);
+    virtual void DoDecNumber(const TText& text);
+    virtual void DoFloatNumber(const TText& text);
+    void DoSyntax(const TText& text) override;
+    void DoOneLineComment(const TText& text) override;
+    void DoMultiLineComment(const TText& text) override;
+    void DoPreprocessor(const TText& text) override;
+
+    void AddKeyword(const TString& keyword);
+
+private:
+    void DoIdentifier(const TText& text) override;
+
+private:
+    class TImpl;
+    THolder<TImpl> Impl_;
+};