Function template trim_left_if
boost::algorithm::trim_left_if — Left trim. 
 
Synopsis
template<typename SequenceT, typename PredicateT> 
  void trim_left_if(SequenceT & Input, PredicateT IsSpace);
 
Description
Remove all leading spaces from the input. The supplied predicate is used to determine which characters are considered spaces. The input sequence is modified in-place.
Parameters
- Input
 
An input sequence 
 
- IsSpace
 
An unary predicate identifying spaces