STATIC void S_find_and_forget_pmops(pTHX_ OP *o);
#define PERL_ARGS_ASSERT_FIND_AND_FORGET_PMOPS \
assert(o)
-STATIC OP* S_fold_constants(pTHX_ OP *o);
+STATIC OP* S_fold_constants(pTHX_ OP * const o);
#define PERL_ARGS_ASSERT_FOLD_CONSTANTS \
assert(o)
STATIC OP* S_force_list(pTHX_ OP* arg, bool nullit);
#define PERL_ARGS_ASSERT_SWATCH_GET \
assert(swash)
-STATIC U8 S_to_lower_latin1(const U8 c, U8 *p, STRLEN *lenp)
+STATIC U8 S_to_lower_latin1(const U8 c, U8 *p, STRLEN *lenp, const char dummy)
__attribute__warn_unused_result__;
STATIC char * S_unexpected_non_continuation_text(pTHX_ const U8 * const s, STRLEN print_len, const STRLEN non_cont_byte_pos, const STRLEN expect_len)