1 files changed, 3 insertions, 0 deletions
diff --git a/awk.h b/awk.h
index cb737eb2..8bc393e7 100644
--- a/awk.h
+++ b/awk.h
@@ -1372,6 +1372,9 @@ extern void negate_num(NODE *n);
 typedef NODE *(*builtin_func_t)(int);	/* function that implements a built-in */
 extern builtin_func_t lookup_builtin(const char *name);
 extern void install_builtins(void);
+extern bool is_alpha(int c);
+extern bool is_alnum(int c);
+extern bool is_identchar(int c);
 /* builtin.c */
 extern double double_to_int(double d);
 extern NODE *do_exp(int nargs);