expandBackUntil abstract method

bool expandBackUntil(
  1. Characters target
)

Expands the range to include characters back until the previous target.

If there is an occurrence of target in the characters preceding the current range, the start of the the range is moved to just after the last such occurrence.

If there is no such occurrence of target, the end of the range is moved to the end of source.

Returns true if there is an occurrence of target and false if not.

Implementation

bool expandBackUntil(Characters target);