# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
import re
regex = r"[^\w](?<!->)(trans|trans_choice|Lang::get|Lang::choice|Lang::trans|Lang::transChoice|@lang|@choice|__)\s*\(\s*((?<![\\])['\"])((?:.(?!(?<![\\])\2))*.?)\2\s*[,\)]"
test_str = ("Should match variations on method:\n"
"trans('a.b');\n"
"trans_choice('a.b')\n"
"Lang::get('a.b');\n"
"Lang::choice('a.b', 1);\n"
"Lang::trans('a.b');\n"
"Lang::transChoice('a.b', 2);\n"
"@lang('language.line')\n"
"@choice('language.line', 1);\n"
"__('a.b')\n\n"
"Should match variations of contained string\n"
"trans('key'); // No group, so JSON style\n"
"__('Json string')\n"
"trans('a.b');\n"
"trans('a.b.c');\n"
"trans('a_b.c-d');\n"
"trans('a.b!');\n"
"trans('a.translate me!');\n"
"trans('a.über~');\n"
"trans(\"app.i'm\"); // contained quote of different type\n"
"trans('app.\"ok\"');\n"
"trans('with contained \" quotes');\n"
"trans('with an escaped \\' quote')\n"
"trans('with a double \\\\')\n\n"
"Should match additional variables and whitespace\n"
"trans('a.b', [1,2]);\n"
"trans ( \n"
" ' with whitespace ' , $var)\n\n"
"Typical use cases\n"
"(trans ( 'lang.line'));\n"
"<span>@lang('lang.line')</span>\n\n"
"Should not match:\n"
"trans($var); // No quotes\n"
"trans(); // Nothing\n"
"anytrans('group.key'); // not the method we need\n"
"1trans('lang.file'); // not the method\n"
"_trans('lang.file'); // not the method\n"
"->trans('lang.line');\n"
"trans(\\'why do we have an escaped quote here?\\')\n"
"trans('with a triple \\\\\\') <-- fail!\n"
"trans('lang.line' . $middle); // concatenated vars\n"
"trans('lang.line' . $middle . '.ending'); // concatenated vars\n"
"___('hello') // not the method we need\n")
matches = re.finditer(regex, test_str)
for matchNum, match in enumerate(matches, start=1):
print ("Match {matchNum} was found at {start}-{end}: {match}".format(matchNum = matchNum, start = match.start(), end = match.end(), match = match.group()))
for groupNum in range(0, len(match.groups())):
groupNum = groupNum + 1
print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = match.start(groupNum), end = match.end(groupNum), group = match.group(groupNum)))
# Note: for Python 2.7 compatibility, use ur"" to prefix the regex and u"" to prefix the test string and substitution.
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html