using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"[^\w](?<!->)(trans|trans_choice|Lang::get|Lang::choice|Lang::trans|Lang::transChoice|@lang|@choice|__)\s*\(\s*((?<![\\])['""])((?:.(?!(?<![\\])\2))*.?)\2\s*[,\)]";
string input = @"Should match variations on method:
trans('a.b');
trans_choice('a.b')
Lang::get('a.b');
Lang::choice('a.b', 1);
Lang::trans('a.b');
Lang::transChoice('a.b', 2);
@lang('language.line')
@choice('language.line', 1);
__('a.b')
Should match variations of contained string
trans('key'); // No group, so JSON style
__('Json string')
trans('a.b');
trans('a.b.c');
trans('a_b.c-d');
trans('a.b!');
trans('a.translate me!');
trans('a.über~');
trans(""app.i'm""); // contained quote of different type
trans('app.""ok""');
trans('with contained "" quotes');
trans('with an escaped \' quote')
trans('with a double \\')
Should match additional variables and whitespace
trans('a.b', [1,2]);
trans (
' with whitespace ' , $var)
Typical use cases
(trans ( 'lang.line'));
<span>@lang('lang.line')</span>
Should not match:
trans($var); // No quotes
trans(); // Nothing
anytrans('group.key'); // not the method we need
1trans('lang.file'); // not the method
_trans('lang.file'); // not the method
->trans('lang.line');
trans(\'why do we have an escaped quote here?\')
trans('with a triple \\\') <-- fail!
trans('lang.line' . $middle); // concatenated vars
trans('lang.line' . $middle . '.ending'); // concatenated vars
___('hello') // not the method we need
";
foreach (Match m in Regex.Matches(input, pattern))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
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 C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx