-#define SUB_INDENT (4)
-
-/** Record that a warning is about to be issued, and treat it as an
- error if <tt>warnings_flag & warnings_error</tt>. This is exported
- only for the sake of Yacc-compatible conflict reports in conflicts.c.
- All other warnings should be implemented in complain.c and should use
- the normal warning format. */
-void set_warning_issued (void);
-
-/** Informative messages, but we proceed. Report iff
- <tt>warnings_flag & warnings_other</tt>. */
-
-void warn (char const *format, ...)
- __attribute__ ((__format__ (__printf__, 1, 2)));
-
-void warn_at (location loc, char const *format, ...)
- __attribute__ ((__format__ (__printf__, 2, 3)));
-
-/* Generate a message aligned by an indent.
- When *indent == 0, assign message's indent to *indent,
- When *indent > 0, align the message by *indent value. */
-void warn_at_indent (location loc, unsigned *indent,
- char const *format, ...)
+# define SUB_INDENT (4)
+
+/*-------------.
+| --warnings. |
+`-------------*/
+
+/** The bits assigned to each warning type. */
+typedef enum
+ {
+ warning_midrule_values, /**< Unset or unused midrule values. */
+ warning_yacc, /**< POSIXME. */
+ warning_conflicts_sr, /**< S/R conflicts. */
+ warning_conflicts_rr, /**< R/R conflicts. */
+ warning_empty_rule, /**< Implicitly empty rules. */
+ warning_deprecated, /**< Obsolete constructs. */
+ warning_precedence, /**< Useless precedence and associativity. */
+ warning_other, /**< All other warnings. */
+
+ warnings_size /**< The number of warnings. Must be last. */
+ } warning_bit;
+
+/** Whether -Werror was set. */
+extern bool warnings_are_errors;
+
+/** Decode a single argument from -W.
+ *
+ * \param arg the subarguments to decode.
+ * If null, then activate all the flags.
+ * \param no length of the potential "no-" prefix.
+ * Can be 0 or 3. If 3, negate the action of the subargument.
+ * \param err length of a potential "error=".
+ * Can be 0 or 6. If 6, treat the subargument as a CATEGORY.
+ *
+ * If VALUE != 0 then KEY sets flags and no-KEY clears them.
+ * If VALUE == 0 then KEY clears all flags from \c all and no-KEY sets all
+ * flags from \c all. Thus no-none = all and no-all = none.
+ */
+void warning_argmatch (char const *arg, size_t no, size_t err);
+
+/** Decode a comma-separated list of arguments from -W.
+ *
+ * \param args comma separated list of effective subarguments to decode.
+ * If 0, then activate all the flags.
+ */
+void warnings_argmatch (char *args);
+
+
+/*-----------.
+| complain. |
+`-----------*/
+
+/** Initialize this module. */
+void complain_init (void);
+
+typedef enum
+ {
+ /**< Issue no warnings. */
+ Wnone = 0,
+
+ Wmidrule_values = 1 << warning_midrule_values,
+ Wyacc = 1 << warning_yacc,
+ Wconflicts_sr = 1 << warning_conflicts_sr,
+ Wconflicts_rr = 1 << warning_conflicts_rr,
+ Wdeprecated = 1 << warning_deprecated,
+ Wempty_rule = 1 << warning_empty_rule,
+ Wprecedence = 1 << warning_precedence,
+ Wother = 1 << warning_other,
+
+ Werror = 1 << 10, /** This bit is no longer used. */
+
+ complaint = 1 << 11, /**< All complaints. */
+ fatal = 1 << 12, /**< All fatal errors. */
+ silent = 1 << 13, /**< Do not display the warning type. */
+ no_caret = 1 << 14, /**< Do not display caret location. */
+
+ /**< All above warnings. */
+ Weverything = ~complaint & ~fatal & ~silent,
+ Wall = Weverything & ~Wyacc
+ } warnings;
+
+/** Whether the warnings of \a flags are all unset.
+ (Never enabled, never disabled). */
+bool warning_is_unset (warnings flags);
+
+/** Make a complaint, with maybe a location. */
+void complain (location const *loc, warnings flags, char const *message, ...)
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