diff options
Diffstat (limited to 'usr.bin/yacc/NEW_FEATURES')
| -rw-r--r-- | usr.bin/yacc/NEW_FEATURES | 46 |
1 files changed, 0 insertions, 46 deletions
diff --git a/usr.bin/yacc/NEW_FEATURES b/usr.bin/yacc/NEW_FEATURES deleted file mode 100644 index b030c625b00..00000000000 --- a/usr.bin/yacc/NEW_FEATURES +++ /dev/null @@ -1,46 +0,0 @@ - The -r option has been implemented. The -r option tells Yacc to -put the read-only tables in y.tab.c and the code and variables in -y.code.c. Keith Bostic asked for this option so that :yyfix could be -eliminated. - - The -l and -t options have been implemented. The -l option tells -Yacc not to include #line directives in the code it produces. The -t -option causes debugging code to be included in the compiled parser. - - The code for error recovery has been changed to implement the same -algorithm as AT&T Yacc. There will still be differences in the way -error recovery works because AT&T Yacc uses more default reductions -than Berkeley Yacc. - - The environment variable TMPDIR determines the directory where -temporary files will be created. If TMPDIR is defined, temporary files -will be created in the directory whose pathname is the value of TMPDIR. -By default, temporary files are created in /tmp. - - The keywords are now case-insensitive. For example, %nonassoc, -%NONASSOC, %NonAssoc, and %nOnAsSoC are all equivalent. - - Commas and semicolons that are not part of C code are treated as -commentary. - - Line-end comments, as in BCPL, are permitted. Line-end comments -begin with // and end at the next end-of-line. Line-end comments are -permitted in C code; they are converted to C comments on output. - - The form of y.output files has been changed to look more like -those produced by AT&T Yacc. - - A new kind of declaration has been added. The form of the declaration -is - - %ident string - -where string is a sequence of characters begining with a double quote -and ending with either a double quote or the next end-of-line, whichever -comes first. The declaration will cause a #ident directive to be written -near the start of the output file. - - If a parser has been compiled with debugging code, that code can be -enabled by setting an environment variable. If the environment variable -YYDEBUG is set to 0, debugging output is suppressed. If it is set to 1, -debugging output is written to standard output. |