+struct msg_location
+ {
+ char *file_name; /* Name of file containing error, or NULL. */
+ int first_line; /* 1-based line number, or 0 if none. */
+ int last_line; /* 1-based exclusive last line (0=none). */
+ int first_column; /* 1-based first column, or 0 if none. */
+ int last_column; /* 1-based exclusive last column (0=none). */
+ };
+
+void msg_location_uninit (struct msg_location *);
+void msg_location_destroy (struct msg_location *);
+struct msg_location *msg_location_dup (const struct msg_location *);
+
+bool msg_location_is_empty (const struct msg_location *);
+void msg_location_format (const struct msg_location *, struct string *);
+
+struct msg_stack