From 151339baea2fa878f41e7f12b4db9effc59197aa Mon Sep 17 00:00:00 2001
From: Vern Paxson <vern@ee.lbl.gov>
Date: Mon, 4 Oct 1993 10:17:40 +0000
Subject: [PATCH] Added yy_fatal_error function.

---
 flex.skl | 59 +++++++++++++++++++++++++++++++-------------------------
 1 file changed, 33 insertions(+), 26 deletions(-)

diff --git a/flex.skl b/flex.skl
index afb7857..1590b6d 100644
--- a/flex.skl
+++ b/flex.skl
@@ -103,33 +103,8 @@
 #define YY_NULL 0
 
 /* Report a fatal error. */
-
-/* The funky do-while is used to turn this macro definition into
- * a single C statement (which needs a semi-colon terminator).
- * This avoids problems with code like:
- *
- * 	if ( something_happens )
- *		YY_FATAL_ERROR( "oops, the something happened" );
- *	else
- *		everything_okay();
- *
- * Prior to using the do-while the compiler would get upset at the
- * "else" because it interpreted the "if" statement as being all
- * done when it reached the ';' after the YY_FATAL_ERROR() call.
- */
-
 #ifndef YY_FATAL_ERROR
-#define YY_FATAL_ERROR(msg) \
-	do \
-		{ \
-%-
-		(void) putc( '\n', stderr ); \
-%+
-		cerr << msg << '\n'; \
-%*
-		exit( 1 ); \
-		} \
-	while ( 0 )
+#define YY_FATAL_ERROR(msg) yy_fatal_error( msg )
 #endif
 
 /* Enter a start condition.  This macro really ought to take a parameter,
@@ -195,7 +170,22 @@ extern "C" {
 #define EOB_ACT_END_OF_FILE 1
 #define EOB_ACT_LAST_MATCH 2
 
+/* The funky do-while in the following #define is used to turn the definition
+ * int a single C statement (which needs a semi-colon terminator).  This
+ * avoids problems with code like:
+ *
+ * 	if ( condition_holds )
+ *		yyless( 5 );
+ *	else
+ *		do_something_else();
+ *
+ * Prior to using the do-while the compiler would get upset at the
+ * "else" because it interpreted the "if" statement as being all
+ * done when it reached the ';' after the yyless() call.
+ */
+
 /* Return all but the first 'n' matched characters back to the input stream. */
+
 #define yyless(n) \
 	do \
 		{ \
@@ -302,6 +292,7 @@ static yy_state_type yy_get_previous_state YY_PROTO(( void ));
 static yy_state_type yy_try_NUL_trans YY_PROTO(( yy_state_type current_state ));
 static int yy_get_next_buffer YY_PROTO(( void ));
 %*
+static void yy_fatal_error YY_PROTO(( const char msg[] ));
 
 /* Done after the current pattern has been matched and before the
  * corresponding action - sets up yytext.
@@ -964,6 +955,22 @@ void yyFlexLexer::yy_init_buffer( YY_BUFFER_STATE b, istream* file )
 	}
 
 
+#ifdef YY_USE_PROTOS
+void yy_fatal_error( const char msg[] )
+#else
+void yy_fatal_error( msg )
+char msg[];
+#endif
+	{
+%-
+	(void) putc( '\n', stderr );
+%+
+	cerr << msg << '\n';
+%*
+	exit( 1 );
+	}
+
+
 /* Redefine yyless() so it works in section 3 code. */
 
 #undef yyless
-- 
2.40.0