options: no longer document warnings when diagnosing an invalid -W

[bison.git] / src / getargs.c

diff --git a/src/getargs.c b/src/getargs.c
index cf5af69477cde89ad032015562971e9799b4fe50..fe6c1d4270bf605017cd42cf61af0bfb9630dd9d 100644 (file)
--- a/src/getargs.c
+++ b/src/getargs.c
@@ -1,6 +1,6 @@
 /* Parse command line arguments for Bison.
 
-   Copyright (C) 1984, 1986, 1989, 1992, 2000-2012 Free Software
+   Copyright (C) 1984, 1986, 1989, 1992, 2000-2013 Free Software
    Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
@@ -46,6 +46,7 @@ bool yacc_flag; /* for -y */
 bool nondeterministic_parser = false;
 bool glr_parser = false;
 
+int feature_flag = feature_caret;
 int report_flag = report_none;
 int trace_flag = trace_none;
 
@@ -195,8 +196,6 @@ ARGMATCH_VERIFY (report_args, report_types);
 
 static const char * const trace_args[] =
 {
-  /* In a series of synonyms, present the most meaningful first, so
-     that argmatch_valid be more readable.  */
   "none       - no traces",
   "scan       - grammar scanner traces",
   "parse      - grammar parser traces",
@@ -243,17 +242,16 @@ ARGMATCH_VERIFY (trace_args, trace_types);
 
 static const char * const warnings_args[] =
 {
-  /* In a series of synonyms, present the most meaningful first, so
-     that argmatch_valid be more readable.  */
-  "none            - no warnings",
-  "midrule-values  - unset or unused midrule values",
-  "yacc            - incompatibilities with POSIX Yacc",
-  "conflicts-sr    - S/R conflicts",
-  "conflicts-rr    - R/R conflicts",
-  "deprecated      - obsolete constructs",
-  "other           - all other warnings",
-  "all             - all of the above",
-  "error           - warnings are errors",
+  "none",
+  "midrule-values",
+  "yacc",
+  "conflicts-sr",
+  "conflicts-rr",
+  "deprecated",
+  "precedence",
+  "other",
+  "all",
+  "error",
   0
 };
 
@@ -265,6 +263,7 @@ static const int warnings_types[] =
   Wconflicts_sr,
   Wconflicts_rr,
   Wdeprecated,
+  Wprecedence,
   Wother,
   Wall,
   Werror
@@ -272,6 +271,27 @@ static const int warnings_types[] =
 
 ARGMATCH_VERIFY (warnings_args, warnings_types);
 
+/*-----------------------.
+| --feature's handling.  |
+`-----------------------*/
+
+static const char * const feature_args[] =
+{
+  "none",
+  "caret", "diagnostics-show-caret",
+  "all",
+  0
+};
+
+static const int feature_types[] =
+{
+  feature_none,
+  feature_caret, feature_caret,
+  feature_all
+};
+
+ARGMATCH_VERIFY (feature_args, feature_types);
+
 /*-------------------------------------------.
 | Display the help message and exit STATUS.  |
 `-------------------------------------------*/
@@ -315,13 +335,13 @@ Operation modes:\n\
       --print-datadir        output directory containing skeletons and XSLT\n\
   -y, --yacc                 emulate POSIX Yacc\n\
   -W, --warnings[=CATEGORY]  report the warnings falling in CATEGORY\n\
+  -f, --feature[=FEATURE]    activate miscellaneous features\n\
 \n\
 "), stdout);
 
       fputs (_("\
 Parser:\n\
   -L, --language=LANGUAGE          specify the output programming language\n\
-                                   (this is an experimental feature)\n\
   -S, --skeleton=FILE              specify the skeleton to use\n\
   -t, --debug                      instrument the parser for tracing\n\
                                    same as `-Dparse.trace'\n\
@@ -332,8 +352,8 @@ Parser:\n\
                                    deprecated by '-Dapi.prefix=PREFIX'\n\
   -l, --no-lines                   don't generate '#line' directives\n\
   -k, --token-table                include a table of token names\n\
-\n\
 "), stdout);
+      putc ('\n', stdout);
 
       /* Keep -d and --defines separate so that ../build-aux/cross-options.pl
        * won't assume that -d also takes an argument.  */
@@ -349,8 +369,8 @@ Output:\n\
   -g, --graph[=FILE]         also output a graph of the automaton\n\
   -x, --xml[=FILE]           also output an XML report of the automaton\n\
                              (the XML schema is experimental)\n\
-\n\
 "), stdout);
+      putc ('\n', stdout);
 
       fputs (_("\
 Warning categories include:\n\
@@ -359,6 +379,7 @@ Warning categories include:\n\
   `conflicts-sr'      S/R conflicts (enabled by default)\n\
   `conflicts-rr'      R/R conflicts (enabled by default)\n\
   `deprecated'        obsolete constructs\n\
+  `precedence'        useless precedence and associativity\n\
   `other'             all other warnings (enabled by default)\n\
   `all'               all the warnings\n\
   `no-CATEGORY'       turn off warnings in CATEGORY\n\
@@ -376,6 +397,14 @@ THINGS is a list of comma separated words that can include:\n\
   `all'          include all the above information\n\
   `none'         disable the report\n\
 "), stdout);
+      putc ('\n', stdout);
+
+      fputs (_("\
+FEATURE is a list of comma separated words that can include:\n\
+  `caret'        show errors with carets\n\
+  `all'          all of the above\n\
+  `none'         disable all of the above\n\
+  "), stdout);
 
       putc ('\n', stdout);
       printf (_("Report bugs to <%s>.\n"), PACKAGE_BUGREPORT);
@@ -486,6 +515,7 @@ static char const short_options[] =
   "W::"
   "b:"
   "d"
+  "f::"
   "e"
   "g::"
   "h"
@@ -538,6 +568,7 @@ static struct option const long_options[] =
 
   /* Output.  */
   { "defines",     optional_argument,   0,   'd' },
+  { "feature",     optional_argument,   0,   'f' },
 
   /* Operation modes.  */
   { "fixed-output-files", no_argument,  0,   'y' },
@@ -572,7 +603,7 @@ command_line_location (void)
 {
   location res;
   /* "<command line>" is used in GCC's messages about -D. */
-  boundary_set (&res.start, uniqstr_new ("<command line>"), optind, -1);
+  boundary_set (&res.start, uniqstr_new ("<command line>"), optind - 1, -1);
   res.end = res.start;
   return res;
 }
@@ -630,6 +661,10 @@ getargs (int argc, char *argv[])
         version ();
         exit (EXIT_SUCCESS);
 
+      case 'f':
+        FLAGS_ARGMATCH (feature, optarg, feature_all);
+        break;
+
       case 'W':
         FLAGS_ARGMATCH (warnings, optarg, Wall);
         break;