Moving code imported from libantlr3c to separate file and adding copyright exception

1 files changed, 0 insertions, 290 deletions

diff --git a/src/parser/antlr_input.cpp b/src/parser/antlr_input.cpp
index ab937ac1a..604502e50 100644
--- a/src/parser/antlr_input.cpp
+++ b/src/parser/antlr_input.cpp
@@ -13,7 +13,6 @@
  ** A super-class for ANTLR-generated input language parsers
  **/
 
-#include <iostream>
 #include <limits.h>
 #include <antlr3.h>
 
@@ -92,84 +91,6 @@ pANTLR3_COMMON_TOKEN_STREAM AntlrInput::getTokenStream() {
   return d_tokenStream;
 }
 
-
-/// Match current input symbol against ttype.  Upon error, do one token
-/// insertion or deletion if possible.
-/// To turn off single token insertion or deletion error
-/// recovery, override mismatchRecover() and have it call
-/// plain mismatch(), which does not recover.  Then any error
-/// in a rule will cause an exception and immediate exit from
-/// rule.  Rule would recover by resynchronizing to the set of
-/// symbols that can follow rule ref.
-///
-// [chris 4/5/2010] Copy and paste from antlr3baserecognizer.c
-void *
-AntlrInput::match(pANTLR3_BASE_RECOGNIZER recognizer, ANTLR3_UINT32 ttype,
-      pANTLR3_BITSET_LIST follow) {
-  pANTLR3_PARSER parser;
-  pANTLR3_TREE_PARSER tparser;
-  pANTLR3_INT_STREAM is;
-  void * matchedSymbol;
-
-  switch(recognizer->type) {
-  case ANTLR3_TYPE_PARSER:
-
-    parser = (pANTLR3_PARSER)(recognizer->super);
-    tparser = NULL;
-    is = parser->tstream->istream;
-
-    break;
-
-  case ANTLR3_TYPE_TREE_PARSER:
-
-    tparser = (pANTLR3_TREE_PARSER)(recognizer->super);
-    parser = NULL;
-    is = tparser->ctnstream->tnstream->istream;
-
-    break;
-
-  default:
-
-    ANTLR3_FPRINTF(
-                   stderr,
-                   "Base recognizer function 'match' called by unknown parser type - provide override for this function\n");
-    return ANTLR3_FALSE;
-
-    break;
-  }
-
-  // Pick up the current input token/node for assignment to labels
-  //
-  matchedSymbol = recognizer->getCurrentInputSymbol(recognizer, is);
-
-  if(is->_LA(is, 1) == ttype) {
-    // The token was the one we were told to expect
-    //
-    is->consume(is); // Consume that token from the stream
-    recognizer->state->errorRecovery = ANTLR3_FALSE; // Not in error recovery now (if we were)
-    recognizer->state->failed = ANTLR3_FALSE; // The match was a success
-    return matchedSymbol; // We are done
-  }
-
-  // We did not find the expected token type, if we are backtracking then
-  // we just set the failed flag and return.
-  //
-  if(recognizer->state->backtracking > 0) {
-    // Backtracking is going on
-    //
-    recognizer->state->failed = ANTLR3_TRUE;
-    return matchedSymbol;
-  }
-
-  // We did not find the expected token and there is no backtracking
-  // going on, so we mismatch, which creates an exception in the recognizer exception
-  // stack.
-  //
-  matchedSymbol = recognizer->recoverFromMismatchedToken(recognizer, ttype,
-                                                         follow);
-  return matchedSymbol;
-}
-
 void AntlrInput::parseError(const std::string& message)
     throw (ParserException) {
   Debug("parser") << "Throwing exception: "
@@ -182,217 +103,6 @@ void AntlrInput::parseError(const std::string& message)
                         d_lexer->getCharPositionInLine(d_lexer));
 }
 
-void *
-AntlrInput::recoverFromMismatchedToken(pANTLR3_BASE_RECOGNIZER recognizer,
-                                       ANTLR3_UINT32 ttype,
-                                       pANTLR3_BITSET_LIST follow) {
-
-  pANTLR3_PARSER parser = (pANTLR3_PARSER) (recognizer->super);
-  pANTLR3_INT_STREAM is = parser->tstream->istream;
-  void *matchedSymbol;
-
-
-  // Create an exception if we need one
-  //
-  if(recognizer->state->exception == NULL) {
-    antlr3RecognitionExceptionNew(recognizer);
-  }
-
-  if(recognizer->mismatchIsUnwantedToken(recognizer, is, ttype) == ANTLR3_TRUE) {
-    recognizer->state->exception->type = ANTLR3_UNWANTED_TOKEN_EXCEPTION;
-    recognizer->state->exception->message
-        = (void*)ANTLR3_UNWANTED_TOKEN_EXCEPTION_NAME;
-  }
-
-  if(recognizer->mismatchIsMissingToken(recognizer, is, follow)) {
-    matchedSymbol = recognizer->getMissingSymbol(recognizer, is,
-                                                 recognizer->state->exception,
-                                                 ttype, follow);
-    recognizer->state->exception->type = ANTLR3_MISSING_TOKEN_EXCEPTION;
-    recognizer->state->exception->message = (void*)ANTLR3_MISSING_TOKEN_EXCEPTION_NAME;
-    recognizer->state->exception->token = matchedSymbol;
-    recognizer->state->exception->expecting = ttype;
-  }
-
-  reportError(recognizer);
-  Unreachable("reportError should have thrown exception in AntlrInput::recoverFromMismatchedToken");
-}
-
-void AntlrInput::reportError(pANTLR3_BASE_RECOGNIZER recognizer) {
-  pANTLR3_EXCEPTION ex = recognizer->state->exception;
-  pANTLR3_UINT8 * tokenNames = recognizer->state->tokenNames;
-  stringstream ss;
-//  std::string msg;
-
-  // Signal we are in error recovery now
-  recognizer->state->errorRecovery = ANTLR3_TRUE;
-
-  // Indicate this recognizer had an error while processing.
-  recognizer->state->errorCount++;
-
-  // Call the builtin error formatter
-  // recognizer->displayRecognitionError(recognizer, recognizer->state->tokenNames);
-
-  /* This switch statement is adapted from antlr3baserecognizer.c:displayRecognitionError in libantlr3c.
-   * TODO: Make error messages more useful, maybe by including more expected tokens and information
-   * about the current token. */
-  switch(ex->type) {
-  case ANTLR3_UNWANTED_TOKEN_EXCEPTION:
-
-    // Indicates that the recognizer was fed a token which seems to be
-    // spurious input. We can detect this when the token that follows
-    // this unwanted token would normally be part of the syntactically
-    // correct stream. Then we can see that the token we are looking at
-    // is just something that should not be there and throw this exception.
-    //
-    if(tokenNames == NULL) {
-      ss << "Unexpected token." ;
-    } else {
-      if(ex->expecting == ANTLR3_TOKEN_EOF) {
-        ss << "Expected end of file.";
-      } else {
-        ss << "Expected " << tokenNames[ex->expecting]
-           << ", found '" << tokenText((pANTLR3_COMMON_TOKEN)ex->token) << "'.";
-      }
-    }
-    break;
-
-  case ANTLR3_MISSING_TOKEN_EXCEPTION:
-
-    // Indicates that the recognizer detected that the token we just
-    // hit would be valid syntactically if preceded by a particular
-    // token. Perhaps a missing ';' at line end or a missing ',' in an
-    // expression list, and such like.
-    //
-    if(tokenNames == NULL) {
-      ss << "Missing token (" << ex->expecting << ").";
-    } else {
-      if(ex->expecting == ANTLR3_TOKEN_EOF) {
-        ss << "Missing end of file marker.";
-      } else {
-        ss << "Missing " << tokenNames[ex->expecting] << ".";
-      }
-    }
-    break;
-
-  case ANTLR3_RECOGNITION_EXCEPTION:
-
-    // Indicates that the recognizer received a token
-    // in the input that was not predicted. This is the basic exception type
-    // from which all others are derived. So we assume it was a syntax error.
-    // You may get this if there are not more tokens and more are needed
-    // to complete a parse for instance.
-    //
-    ss <<"Syntax error.";
-    break;
-
-  case ANTLR3_MISMATCHED_TOKEN_EXCEPTION:
-
-    // We were expecting to see one thing and got another. This is the
-    // most common error if we could not detect a missing or unwanted token.
-    // Here you can spend your efforts to
-    // derive more useful error messages based on the expected
-    // token set and the last token and so on. The error following
-    // bitmaps do a good job of reducing the set that we were looking
-    // for down to something small. Knowing what you are parsing may be
-    // able to allow you to be even more specific about an error.
-    //
-    if(tokenNames == NULL) {
-      ss << "Syntax error.";
-    } else {
-      if(ex->expecting == ANTLR3_TOKEN_EOF) {
-        ss << "Expected end of file.";
-      } else {
-        ss << "Expected " << tokenNames[ex->expecting] << ".";
-      }
-    }
-    break;
-
-  case ANTLR3_NO_VIABLE_ALT_EXCEPTION:
-    // We could not pick any alt decision from the input given
-    // so god knows what happened - however when you examine your grammar,
-    // you should. It means that at the point where the current token occurred
-    // that the DFA indicates nowhere to go from here.
-    //
-    ss << "Unexpected token: '" << tokenText((pANTLR3_COMMON_TOKEN)ex->token) << "'.";
-    break;
-
-  case ANTLR3_MISMATCHED_SET_EXCEPTION:
-
-  {
-    ANTLR3_UINT32 count;
-    ANTLR3_UINT32 bit;
-    ANTLR3_UINT32 size;
-    ANTLR3_UINT32 numbits;
-    pANTLR3_BITSET errBits;
-
-    // This means we were able to deal with one of a set of
-    // possible tokens at this point, but we did not see any
-    // member of that set.
-    //
-    ss << "Unexpected input: '" << tokenText((pANTLR3_COMMON_TOKEN)ex->token)
-       << "'. Expected one of: ";
-
-    // What tokens could we have accepted at this point in the
-    // parse?
-    //
-    count = 0;
-    errBits = antlr3BitsetLoad(ex->expectingSet);
-    numbits = errBits->numBits(errBits);
-    size = errBits->size(errBits);
-
-    if(size > 0) {
-      // However many tokens we could have dealt with here, it is usually
-      // not useful to print ALL of the set here. I arbitrarily chose 8
-      // here, but you should do whatever makes sense for you of course.
-      // No token number 0, so look for bit 1 and on.
-      //
-      for(bit = 1; bit < numbits && count < 8 && count < size; bit++) {
-        // TODO: This doesn;t look right - should be asking if the bit is set!!
-        //
-        if(tokenNames[bit]) {
-          if( count++ > 0 ) {
-            ss << ", ";
-          }
-          ss << tokenNames[bit];
-        }
-      }
-    } else {
-      Unreachable("Parse error with empty set of expected tokens.");
-    }
-  }
-    break;
-
-  case ANTLR3_EARLY_EXIT_EXCEPTION:
-
-    // We entered a loop requiring a number of token sequences
-    // but found a token that ended that sequence earlier than
-    // we should have done.
-    //
-    ss << "Sequence terminated early by token: '"
-       << tokenText((pANTLR3_COMMON_TOKEN)ex->token) << "'.";
-    break;
-
-  default:
-
-    // We don't handle any other exceptions here, but you can
-    // if you wish. If we get an exception that hits this point
-    // then we are just going to report what we know about the
-    // token.
-    //
-    Unhandled("Unexpected exception in parser.");
-    break;
-  }
-
-  // Now get ready to throw an exception
-  pANTLR3_PARSER parser = (pANTLR3_PARSER)(recognizer->super);
-  AlwaysAssert(parser!=NULL);
-  ParserState *parserState = (ParserState*)(parser->super);
-  AlwaysAssert(parserState!=NULL);
-
-  // Call the error display routine
-  parserState->parseError(ss.str());
-}
 
 void AntlrInput::setLexer(pANTLR3_LEXER pLexer) {
   d_lexer = pLexer;