[Bug #20025] Check if upper/lower before fallback to case-folding

1 files changed, 2 insertions, 2 deletions

diff --git a/symbol.c b/symbol.c
index 2447b1ec10..6a0c926db8 100644
--- a/symbol.c
+++ b/symbol.c
@@ -225,10 +225,10 @@ rb_sym_constant_char_p(const char *name, long nlen, rb_encoding *enc)
     if (!MBCLEN_CHARFOUND_P(c)) return FALSE;
     len = MBCLEN_CHARFOUND_LEN(c);
     c = rb_enc_mbc_to_codepoint(name, end, enc);
+    if (rb_enc_isupper(c, enc)) return TRUE;
+    if (rb_enc_islower(c, enc)) return FALSE;
     if (ONIGENC_IS_UNICODE(enc)) {
         static int ctype_titlecase = 0;
-        if (rb_enc_isupper(c, enc)) return TRUE;
-        if (rb_enc_islower(c, enc)) return FALSE;
         if (!ctype_titlecase) {
             static const UChar cname[] = "titlecaseletter";
             static const UChar *const end = cname + sizeof(cname) - 1;