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/* Ariel Tamches (tamches@cs.wisc.edu):
* This tests linking in a simple non-DLG scanner with user-defined token
* types.
*/
/* All TokenType's must have some end-of-file token; You must define
* it with setEofToken() to your end of input token.
*
* We assume that #tokdefs is employed for this example; i.e., ANTLR does
* NOT assign token numbers.
*
* ANTLR option -gx must be used to turn off generation of DLG crud (when you
* want to define your own token stream).
*/
#tokdefs "mytokens.h"
/* user should define ANTLRToken outside of #header since AToken.h would
* not have been included yet. You can force inclusion of AToken.h if
* you must use #header, however.
*/
<<
typedef ANTLRCommonToken ANTLRToken; /* use a predefined Token class */
>>
/* At this point, ANTLRToken and ANTLRTokenStream are defined, user must now
* derive a class from ANTLRTokenStream (which embodies the user's scanner)
*/
<<#include "MyLexer.h">>
<<
int main()
{
/* create one of my scanners */
MyLexer scan;
ANTLRTokenBuffer pipe(&scan);
/* create a parser of type Expr hooked to my scanner */
Expr parser(&pipe);
parser.init();
parser.setEofToken(Eof);
parser.e(); /* start parsing at rule 'e' of that parser */
return 0;
}
>>
class Expr {
e : IDENTIFIER NUMBER
<<fprintf(stderr, "text is %s,%s\n", $1->getText(), $2->getText());>>
Eof
;
}
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