/** Tell me how to create a token for use with imaginary token nodes.
* For example, there is probably no input symbol associated with imaginary
* token DECL, but you need to create it as a payload or whatever for
* the DECL node as in ^(DECL type ID).
*
* This is a variant of createToken where the new token is derived from
* an actual real input token. Typically this is for converting '{'
* tokens to BLOCK etc... You'll see
*
* r : lc='{' ID+ '}' -> ^(BLOCK[$lc] ID+) ;
*
* If you care what the token payload objects' type is, you should
* override this method and any other createToken variant.
*
* NB: this being C it is not so easy to extend the types of creaeteToken.
* We will have to see if anyone needs to do this and add any variants to
* this interface.
*/
static pANTLR3_COMMON_TOKEN
createTokenFromToken (pANTLR3_BASE_TREE_ADAPTOR adaptor, pANTLR3_COMMON_TOKEN fromToken)
{
pANTLR3_COMMON_TOKEN newToken;
newToken = adaptor->tokenFactory->newToken(adaptor->tokenFactory);
if (newToken != NULL)
{
/* Create the text using our own string factory to avoid complicating
* commontoken.
*/
pANTLR3_STRING text;
newToken->toString = fromToken->toString;
text = fromToken->getText(fromToken);
newToken->text = adaptor->strFactory->newPtr(adaptor->strFactory, text->chars, text->len);
newToken->setLine (newToken, fromToken->getLine(fromToken));
newToken->setTokenIndex (newToken, fromToken->getTokenIndex(fromToken));
newToken->setCharPositionInLine (newToken, fromToken->getCharPositionInLine(fromToken));
newToken->setChannel (newToken, fromToken->getChannel(fromToken));
newToken->setType (newToken, fromToken->getType(fromToken));
}
return newToken;
}
/**
* Helper for the query type determination.
*/
static bool isTokenText(pANTLR3_COMMON_TOKEN token, const std::string &expected)
{
pANTLR3_STRING text = token->getText(token);
if (text == NULL)
return false;
return base::tolower((const char*)text->chars) == expected;
}
static pANTLR3_STRING toString (pANTLR3_COMMON_TOKEN token)
{
pANTLR3_STRING text;
pANTLR3_STRING outtext;
text = token->getText(token);
if (text == NULL)
{
return NULL;
}
if (text->factory == NULL)
{
return text; // This usally means it is the EOF token
}
/* A new empty string to assemble all the stuff in
*/
outtext = text->factory->newRaw(text->factory);
/* Now we use our handy dandy string utility to assemble the
* the reporting string
* return "[@"+getTokenIndex()+","+start+":"+stop+"='"+txt+"',<"+type+">"+channelStr+","+line+":"+getCharPositionInLine()+"]";
*/
outtext->append8(outtext, "[Index: ");
outtext->addi (outtext, (ANTLR3_INT32)token->getTokenIndex(token));
outtext->append8(outtext, " (Start: ");
outtext->addi (outtext, (ANTLR3_INT32)token->getStartIndex(token));
outtext->append8(outtext, "-Stop: ");
outtext->addi (outtext, (ANTLR3_INT32)token->getStopIndex(token));
outtext->append8(outtext, ") ='");
outtext->appendS(outtext, text);
outtext->append8(outtext, "', type<");
outtext->addi (outtext, token->type);
outtext->append8(outtext, "> ");
if (token->getChannel(token) > ANTLR3_TOKEN_DEFAULT_CHANNEL)
{
outtext->append8(outtext, "(channel = ");
outtext->addi (outtext, (ANTLR3_INT32)token->getChannel(token));
outtext->append8(outtext, ") ");
}
outtext->append8(outtext, "Line: ");
outtext->addi (outtext, (ANTLR3_INT32)token->getLine(token));
outtext->append8(outtext, " LinePos:");
outtext->addi (outtext, token->getCharPositionInLine(token));
outtext->addc (outtext, ']');
return outtext;
}