libcdecl: Silence GCC -Wunused-function warnings in the scanner.

[cdecl99.git] / src / scan.l

diff --git a/src/scan.l b/src/scan.l
index 48314d4e00df2203cdba59f2aac0ca5c67009307..f7e1b03eb158f44c3dbbc83ea950d4aedf02540c 100644 (file)
--- a/src/scan.l
+++ b/src/scan.l
@@ -1,7 +1,7 @@
 %top{
 /*
  *  Scanner for C declarations.
- *  Copyright © 2011, 2021, 2023 Nick Bowler
+ *  Copyright © 2011, 2021, 2023-2024 Nick Bowler
  *
  *  This program is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -18,10 +18,63 @@
  */
 
 #include <config.h>
+#include <stdio.h>
 #include "parse.h"
 
+/* Disable various generated code we don't use */
+#define YY_INPUT(a, b, c) do {} while (0)
 #define YY_NO_INPUT 1
 #define YY_NO_UNPUT 1
+
+/*
+ * The flex-generated scanner defines a huge pile of external functions of
+ * which we use almost none elsewhere.  Explicitly declare any unneeded
+ * functions static, which allows better optimization (especially wrt.
+ * dead code elimination).
+ */
+#if !cdecl__yyIN_HEADER
+
+#if __GNUC__
+#  define static __attribute__((__unused__)) static
+#endif
+
+static struct yy_buffer_state *cdecl__yy_create_buffer(FILE *, int, void *);
+static struct yy_buffer_state *cdecl__yy_scan_bytes(const char *, int, void *);
+static struct yy_buffer_state *cdecl__yy_scan_buffer(char *, size_t, void *);
+static void cdecl__yy_switch_to_buffer(struct yy_buffer_state *, void *);
+static void cdecl__yy_flush_buffer(struct yy_buffer_state *, void *);
+static void cdecl__yypush_buffer_state(struct yy_buffer_state *, void *);
+static void cdecl__yypop_buffer_state(void *);
+static void cdecl__yyrestart(FILE *, void *);
+static int cdecl__yylex_init(void **);
+
+static int cdecl__yyget_extra(void *);
+static YYLTYPE *cdecl__yyget_lloc(void *);
+static YYSTYPE *cdecl__yyget_lval(void *);
+static char *cdecl__yyget_text(void *);
+static FILE *cdecl__yyget_out(void *);
+static FILE *cdecl__yyget_in(void *);
+static int cdecl__yyget_debug(void *);
+static int cdecl__yyget_lineno(void *);
+static int cdecl__yyget_column(void *);
+static int cdecl__yyget_leng(void *);
+
+static void cdecl__yyset_extra(int, void *);
+static void cdecl__yyset_lloc(YYLTYPE *, void *);
+static void cdecl__yyset_lval(YYSTYPE *, void *);
+static void cdecl__yyset_in(FILE *, void *);
+static void cdecl__yyset_out(FILE *, void *);
+static void cdecl__yyset_debug(int, void *);
+static void cdecl__yyset_lineno(int, void *);
+static void cdecl__yyset_column(int, void *);
+
+static void *cdecl__yyrealloc(void *, size_t, void *);
+static void *cdecl__yyalloc(size_t, void *);
+static void cdecl__yyfree(void *, void *);
+
+#undef static
+
+#endif
 }
 
 %option nodefault noyywrap bison-locations reentrant never-interactive
@@ -187,6 +240,6 @@ int_parse:
        c = yytext;
 invalid_char:
        to_readable_ch(buf, *c);
-       cdecl__err(CDECL_ENOPARSE, _("syntax error, unexpected %s"), buf);
+       cdecl__err(_("syntax error, unexpected %s"), buf);
        return T_LEX_ERROR;
 }