Enums


  enum os_regexp::syntax
  {
  emacs,
  awk,
  posix_awk,
  grep,
  egrep,
  posix_egrep,
  posix_basic,
  posix_extended,
  };

Interface

Constructor

os_regexp()

Default constructs a regular expression object.

Constructor

os_regexp( const string& pattern , bool use_fastmap, bool ignore_case )

Constructs a regular expression object with pattern . If use_fastmap (default false ) is true , uses an internal buffer to optimize searches. If ignore_case (default false ) is true , pattern matching is case insensitive.

Destructor

~os_regexp()

Destroys this object.

default_syntax

/* static */ syntax default_syntax()

Returns the default syntax which is used when compiling patterns.

default_syntax

/* static */ void default_syntax( syntax new_syntax )

Sets the syntax to new_syntax , which is used when compiling patterns.

group

os_regexp::range group( size_t number ) const

Returns a range to subexpression group number in the regular expression pattern. If number is 0 , the substring contains the entire pattern. If number does not represent a valid subexpression group, an empty substring is returned.

groups

size_t groups() const

Returns the number of subexpression groups in the regular expression pattern. This does not include the whole expression.

match

int match( const string& s , size_t pos , size_t len )

Searches the string s , starting at pos (default 0 ) for length len (default npos ), and returns the number of characters that match the regular expression pattern. If no match is found, returns 0 .

not_found

/* static */ range not_found()

Returns a range which represents a search failure. The search() and group() functions return this object when the search string does not contain the pattern.

pattern

void pattern( const string& pattern , bool use_fastmap, bool ignore_case )

Assigns the regular expression value to pattern . If use_fastmap (default false ) is true , uses an internal buffer to optimize searches. If ignore_case (default false ) is true , pattern matching is case insensitive.

replace

size_t replace( const string& s , size_t pos , size_t len , const string& r , bool global )

Searches the string s , starting at pos for length len , for a substring matching the regular expression pattern and replaces it with the string r . If global (default false ) is true , replaces all occurrences of the pattern in string s . Returns the number of substitutions that occurred.

search

os_regexp::range search( const string& s , size_t pos , size_t len )

Searches for the pattern starting from the position pos (default 0 ) extending to length len (default npos ) in the string s , and returns a range for the first sequence that matches the regular expression pattern. If no match is found, returns an empty range.

regexp

Library

Declaration

Enums

Interface