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authorDevtools Arcadia <arcadia-devtools@yandex-team.ru>2022-02-07 18:08:42 +0300
committerDevtools Arcadia <arcadia-devtools@mous.vla.yp-c.yandex.net>2022-02-07 18:08:42 +0300
commit1110808a9d39d4b808aef724c861a2e1a38d2a69 (patch)
treee26c9fed0de5d9873cce7e00bc214573dc2195b7 /contrib/libs/antlr3_cpp_runtime/include/antlr3exception.hpp
downloadydb-1110808a9d39d4b808aef724c861a2e1a38d2a69.tar.gz
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+/** \file
+ * Contains the definition of a basic ANTLR3 exception structure created
+ * by a recognizer when errors are found/predicted.
+
+ * Two things to be noted for C++ Target:
+ a) This is not the C++ Exception. Consider this just as yet another class. This
+ has to be like this because there is a inbuilt recovery and hence there is a try..catch
+ block for every new token. This is not how C++ Exceptions work.Still there is exception support, as we are handling things like OutofMemory by
+ throwing exceptions
+
+ b) There is no use in implementing templates here, as all the exceptions are grouped in
+ one container and hence needs virtual functions. But this would occur only when there is
+ a exception/ while deleting base recognizer. So shouldn't incur the overhead in normal operation
+ */
+#ifndef _ANTLR3_EXCEPTION_HPP
+#define _ANTLR3_EXCEPTION_HPP
+
+// [The "BSD licence"]
+// Copyright (c) 2005-2009 Gokulakannan Somasundaram, ElectronDB
+
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+// 3. The name of the author may not be used to endorse or promote products
+// derived from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+namespace antlr3 {
+
+/** Base structure for an ANTLR3 exception tracker
+ */
+
+template<class ImplTraits, class StreamType>
+class ANTLR_ExceptionBase
+{
+public:
+ typedef typename StreamType::UnitType TokenType;
+ typedef typename StreamType::IntStreamType IntStreamType;
+ typedef typename ImplTraits::AllocPolicyType AllocPolicyType;
+ typedef typename ImplTraits::StringType StringType;
+ typedef typename ImplTraits::StringStreamType StringStreamType;
+ typedef typename ImplTraits::BitsetType BitsetType;
+ typedef typename ImplTraits::BitsetListType BitsetListType;
+ typedef typename ImplTraits::template ExceptionBaseType<StreamType> ExceptionBaseType;
+
+protected:
+ /** The printable message that goes with this exception, in your preferred
+ * encoding format. ANTLR just uses ASCII by default but you can ignore these
+ * messages or convert them to another format or whatever of course. They are
+ * really internal messages that you then decide how to print out in a form that
+ * the users of your product will understand, as they are unlikely to know what
+ * to do with "Recognition exception at: [[TOK_GERUND..... " ;-)
+ */
+ StringType m_message;
+
+ /** Name of the file/input source for reporting. Note that this may be empty!!
+ */
+ StringType m_streamName;
+
+ /** Indicates the index of the 'token' we were looking at when the
+ * exception occurred.
+ */
+ ANTLR_MARKER m_index;
+
+ /** Indicates what the current token/tree was when the error occurred. Since not
+ * all input streams will be able to retrieve the nth token, we track it here
+ * instead. This is for parsers, and even tree parsers may set this.
+ */
+ const TokenType* m_token;
+
+ /** Pointer to the next exception in the chain (if any)
+ */
+ ExceptionBaseType* m_nextException;
+
+ /** Indicates the token we were expecting to see next when the error occurred
+ */
+ ANTLR_UINT32 m_expecting;
+
+ /** Indicates a set of tokens that we were expecting to see one of when the
+ * error occurred. It is a following bitset list, so you can use load it and use ->toIntList() on it
+ * to generate an array of integer tokens that it represents.
+ */
+ BitsetListType* m_expectingSet;
+
+ /** If this is a tree parser exception then the node is set to point to the node
+ * that caused the issue.
+ */
+ TokenType* m_node;
+
+ /** The current character when an error occurred - for lexers.
+ */
+ ANTLR_UCHAR m_c;
+
+ /** Track the line at which the error occurred in case this is
+ * generated from a lexer. We need to track this since the
+ * unexpected char doesn't carry the line info.
+ */
+ ANTLR_UINT32 m_line;
+
+ /** Character position in the line where the error occurred.
+ */
+ ANTLR_INT32 m_charPositionInLine;
+
+ /** decision number for NVE
+ */
+ ANTLR_UINT32 m_decisionNum;
+
+ /** State for NVE
+ */
+ ANTLR_UINT32 m_state;
+
+ /** Rule name for failed predicate exception
+ */
+ StringType m_ruleName;
+
+ /** Pointer to the input stream that this exception occurred in.
+ */
+ IntStreamType* m_input;
+
+public:
+ StringType& get_message();
+ StringType& get_streamName();
+ ANTLR_MARKER get_index() const;
+ const TokenType* get_token() const;
+ ExceptionBaseType* get_nextException() const;
+ ANTLR_UINT32 get_expecting() const;
+ BitsetListType* get_expectingSet() const;
+ TokenType* get_node() const;
+ ANTLR_UCHAR get_c() const;
+ ANTLR_UINT32 get_line() const;
+ ANTLR_INT32 get_charPositionInLine() const;
+ ANTLR_UINT32 get_decisionNum() const;
+ ANTLR_UINT32 get_state() const;
+ StringType& get_ruleName();
+ IntStreamType* get_input() const;
+ void set_message( const StringType& message );
+ void set_streamName( const StringType& streamName );
+ void set_index( ANTLR_MARKER index );
+ void set_token( const TokenType* token );
+ void set_nextException( ExceptionBaseType* nextException );
+ void set_expecting( ANTLR_UINT32 expecting );
+ void set_expectingSet( BitsetListType* expectingSet );
+ void set_node( TokenType* node );
+ void set_c( ANTLR_UCHAR c );
+ void set_line( ANTLR_UINT32 line );
+ void set_charPositionInLine( ANTLR_INT32 charPositionInLine );
+ void set_decisionNum( ANTLR_UINT32 decisionNum );
+ void set_state( ANTLR_UINT32 state );
+ void set_ruleName( const StringType& ruleName );
+ void set_input( IntStreamType* input );
+ StringType getDescription() const;
+
+ virtual StringType getName() const = 0;
+ virtual ANTLR_UINT32 getType() const = 0;
+ virtual void print() const = 0;
+ virtual void displayRecognitionError( ANTLR_UINT8** tokenNames, StringStreamType& str ) const = 0;
+
+ virtual ~ANTLR_ExceptionBase();
+
+protected:
+ ANTLR_ExceptionBase(const StringType& message);
+};
+
+
+template<class ImplTraits, ExceptionType Ex, class StreamType>
+class ANTLR_Exception : public ImplTraits::template ExceptionBaseType<StreamType>
+{
+public:
+ typedef typename ImplTraits::StringType StringType;
+ typedef typename ImplTraits::StringStreamType StringStreamType;
+ typedef typename ImplTraits::BitsetType BitsetType;
+ typedef typename ImplTraits::template ExceptionBaseType<StreamType> BaseType;
+
+public:
+ template<typename BaseRecognizerType>
+ ANTLR_Exception(BaseRecognizerType* recognizer, const StringType& message);
+
+ const StringType& get_name() const;
+ virtual StringType getName() const;
+ virtual ANTLR_UINT32 getType() const;
+ virtual void print() const;
+ virtual void displayRecognitionError( ANTLR_UINT8** tokenNames, StringStreamType& str_stream) const;
+};
+
+}
+
+#include "antlr3exception.inl"
+
+#endif