Make LanguageConverter roman-numeral cases consistent

[lhc/web/wiklou.git] / languages / classes / LanguageCrh.php

diff --git a/languages/classes/LanguageCrh.php b/languages/classes/LanguageCrh.php
index d5418b9..01a5a79 100644 (file)
--- a/languages/classes/LanguageCrh.php
+++ b/languages/classes/LanguageCrh.php
@@ -219,7 +219,8 @@ class CrhConverter extends LanguageConverter {
                }
 
                // check for roman numbers like VII, XIX...
-               $roman = '/^M{0,3}(C[DM]|D{0,1}C{0,3})(X[LC]|L{0,1}X{0,3})(I[VX]|V{0,1}I{0,3})$/u';
+               // Lookahead assertion ensures $roman doesn't match the empty string
+               $roman = '/^(?=[MDCLXVI])M{0,4}(C[DM]|D?C{0,3})(X[LC]|L?X{0,3})(I[VX]|V?I{0,3})$/u';
 
                # match any sub-string of the relevant letters and convert it
                $matches = preg_split( '/(\b|^)[^' . $letters . ']+(\b|$)/u',