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top of the location stack's error locations. (yyerrlab): Set it. When discarding a token, push its location onto yylerrsp so that we don't lose track of the error's end. (yyerrlab1): Now is only the target of YYERROR, so that we can properly record the location of the action that failed. For GCC 2.93 and later, insert an __attribute__ ((__unused__)) to avoid GCC warning about yyerrlab1 being unused if YYERROR is unused. (yyerrlab2): New label, which yyerrlab now falls through to. Compute the error's location by applying YYLLOC_DEFAULT to the locations of all the symbols that went into the error.
This directory contains the Bison parser generator. See the file INSTALL for compilation and installation instructions. See the file doc/FAQ for frequently asked questions. It was once true that, when installing Bison on Sequent (or Pyramid?) systems, you had to be in the Berkeley universe. This may no longer be true; we have no way to tell. On VMS, you will probably have to create Makefile from Makefile.in by hand. Remember to do `SET COMMAND BISON' to install the data in `BISON.CLD'. VMS and MS-DOS builds are probably broken right now. If you are able to build Bison on either platform and you need to make changes to do so, please submit those changes as a bug report. Send bug reports to bug-bison@gnu.org. Please include the version number from `bison --version', and a complete, self-contained test case in each bug report. If you have questions about using Bison which the documentation does not answer, send mail to help-bison@gnu.org.