Function template trim_left_copy
boost::algorithm::trim_left_copy — Left trim - parametric. 
 
Synopsis
template<typename SequenceT> 
  SequenceT trim_left_copy(const SequenceT & Input, 
                           const std::locale & Loc = std::locale());
 
Description
Remove all leading spaces from the input. The result is a trimmed copy of the input.
Parameters
- Input
 
An input sequence 
 
- Loc
 
a locale used for 'space' classification 
 
 
Returns:
    A trimmed copy of the input
Notes:
    This function provides the strong exception-safety guarantee