maint: more syntax-checks

[bison.git] / src / flex-scanner.h

diff --git a/src/flex-scanner.h b/src/flex-scanner.h
index 997984117848430a48d54896ba8999f64b11f9a3..9c111aa2506e0cd9fe32269a908e07739414d71e 100644 (file)
--- a/src/flex-scanner.h
+++ b/src/flex-scanner.h
@@ -21,20 +21,14 @@
 # error "FLEX_PREFIX not defined"
 #endif
 
-/* Whether this version of Flex is (strictly) greater than
-   Major.Minor.Subminor.  */
-#define FLEX_VERSION_GT(Major, Minor, Subminor)                         \
-  (defined YY_FLEX_MAJOR_VERSION                                        \
-   && (Major < YY_FLEX_MAJOR_VERSION                                    \
-       || (Major == YY_FLEX_MAJOR_VERSION                               \
-           && (defined YY_FLEX_MINOR_VERSION                            \
-               && (Minor < YY_FLEX_MINOR_VERSION                        \
-                   || (Minor == YY_FLEX_MINOR_VERSION                   \
-                       && defined YY_FLEX_SUBMINOR_VERSION              \
-                       && Subminor < YY_FLEX_SUBMINOR_VERSION))))))
+/* Flex full version as a number.  */
+#define FLEX_VERSION                    \
+  ((YY_FLEX_MAJOR_VERSION) * 1000000    \
+   + (YY_FLEX_MINOR_VERSION) * 1000     \
+   + (YY_FLEX_SUBMINOR_VERSION))
 
 /* Pacify "gcc -Wmissing-prototypes" when flex 2.5.31 is used.  */
-# if ! FLEX_VERSION_GT (2, 5, 31)
+#if FLEX_VERSION <= 2005031
 int   FLEX_PREFIX (get_lineno) (void);
 FILE *FLEX_PREFIX (get_in) (void);
 FILE *FLEX_PREFIX (get_out) (void);
@@ -65,7 +59,7 @@ int   FLEX_PREFIX (lex_destroy) (void);
    versions according to the Flex manual) leak memory if yylex_destroy is not
    invoked.  However, yylex_destroy is not defined before Flex 2.5.9, so give
    an implementation here that at least appears to work with Flex 2.5.4.  */
-#if ! FLEX_VERSION_GT (2, 5, 9)
+#if FLEX_VERSION <= 2005009
 # define yylex_destroy() yy_delete_buffer (YY_CURRENT_BUFFER)
 #endif
 
@@ -82,16 +76,13 @@ int   FLEX_PREFIX (lex_destroy) (void);
 
 static struct obstack obstack_for_string;
 
-# define STRING_GROW   \
+# define STRING_GROW                                    \
   obstack_grow (&obstack_for_string, yytext, yyleng)
 
-# define STRING_FINISH                                 \
-  do {                                                 \
-    obstack_1grow (&obstack_for_string, '\0');         \
-    last_string = obstack_finish (&obstack_for_string);        \
-  } while (0)
+# define STRING_FINISH                                  \
+  (last_string = obstack_finish0 (&obstack_for_string))
 
-# define STRING_FREE \
+# define STRING_FREE                                    \
   obstack_free (&obstack_for_string, last_string)
 
 #endif