Bug 11807 – Functions to attempt string-to-T conversions (a la C#'s TryParse)

std.conv provides 'to' and 'parse', but both will throw exceptions if they fail to convert. The only way to test if a conversion is possible is to call these functions and catch the exception. This isn't a great situation because throwing exceptions is not good for performance. This enhancement requests something akin to C#'s TryParse, which returns a boolean false if the conversion failed and returns the converted value as an out parameter. Like this: bool tryParse(T)(string s, out T value) An alternative API would be to return a Nullable!T See Also: http://msdn.microsoft.com/en-us/library/f02979c7(v=vs.110).aspx

See also Issue 6840

Duplicate of Issue 6840. *** This issue has been marked as a duplicate of issue 6840 ***