character_class_escape(x)## S3 method for class 'regex':
character_class_escape(x)
## S3 method for class 'character_class':
character_class_escape(x)
## S3 method for class 'character':
character_class_escape(x)
## S3 method for class 'list':
character_class_escape(x)
## S3 method for class 'default':
character_class_escape(x)
regex: objects are passed through unchanged.character_class: objects are passed through unchanged.character: objects properly escaped for character classes.list: callcharacter_class_escapeon all elements of the list.default: coerce tocharacterandcharacter_class_escape.