Introduced lexer & parser interfaces

commit_hash:fee365c90a176dd33a967cee20994b21d530080c

1 files changed, 11 insertions, 0 deletions

diff --git a/yql/essentials/parser/lexer_common/lexer.h b/yql/essentials/parser/lexer_common/lexer.h
index f5d96006813..4de7eedb836 100644
--- a/yql/essentials/parser/lexer_common/lexer.h
+++ b/yql/essentials/parser/lexer_common/lexer.h
@@ -39,5 +39,16 @@ using TParsedTokenList = TVector<TParsedToken>;
 IOutputStream& OutputTokens(IOutputStream& out, TParsedTokenList::const_iterator begin, TParsedTokenList::const_iterator end);
 bool Tokenize(ILexer& lexer, const TString& query, const TString& queryName, TParsedTokenList& tokens, NYql::TIssues& issues, size_t maxErrors);
 
+class ILexerFactory : public TThrRefBase {
+public:
+    virtual ~ILexerFactory() = default;
+
+    virtual ILexer::TPtr MakeLexer() const = 0;
+};
+
+using TLexerFactoryPtr = TIntrusivePtr<ILexerFactory>;
+
+TLexerFactoryPtr MakeDummyLexerFactory(const TString& name);
+
 }