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FX::FXRex Class Reference

FXRex is a regular expression class implementing a NFA matcher. More...

#include <FXRex.h>

List of all members.

Public Member Functions

 FXRex ()
 FXRex (const FXRex &orig)
 FXRex (const FXchar *pattern, FXint mode=REX_NORMAL, FXRexError *error=NULL)
 FXRex (const FXString &pattern, FXint mode=REX_NORMAL, FXRexError *error=NULL)
FXRex & operator= (const FXRex &orig)
FXbool empty () const
FXRexError parse (const FXchar *pattern, FXint mode=REX_NORMAL)
FXRexError parse (const FXString &pattern, FXint mode=REX_NORMAL)
FXbool match (const FXchar *string, FXint len, FXint *beg=NULL, FXint *end=NULL, FXint mode=REX_FORWARD, FXint npar=1, FXint fm=0, FXint to=2147483647) const
FXbool match (const FXString &string, FXint *beg=NULL, FXint *end=NULL, FXint mode=REX_FORWARD, FXint npar=1, FXint fm=0, FXint to=2147483647) const
 ~FXRex ()

Static Public Member Functions

FXString substitute (const FXchar *string, FXint len, FXint *beg, FXint *end, const FXString &replace, FXint npar=1)
FXString substitute (const FXString &string, FXint *beg, FXint *end, const FXString &replace, FXint npar=1)
const FXchar * getError (FXRexError err)

Friends

FXbool operator== (const FXRex &r1, const FXRex &r2)
FXbool operator!= (const FXRex &r1, const FXRex &r2)
FXStream & operator<< (FXStream &store, const FXRex &s)
FXStream & operator>> (FXStream &store, FXRex &s)

Detailed Description

FXRex is a regular expression class implementing a NFA matcher.

It supports capturing parentheses, non-capturing parentheses, positive or negative lookahead, backreferences, case-insensitive matching, counted repetitions, lazy or greedy matches, and PERL-like matching operators. The subject string may be scanned forwards or backwards, and may contain any of 256 possible character values.

When parsing a regular expression pattern, the mode parameter is the bitwise OR of a set of flags and affects the match algorithm. Passing the flag REX_CAPTURE enables capturing parentheses and back references. The flag REX_ICASE enables case-insensitive matching. When the flag REX_NEWLINE is passed, newlines are treated like normal characters; otherwise, newline is NOT matched except when explicitly part of a character class. The flag REX_VERBATIM disables all special character interpretation.

When matching a compiled pattern, the mode parameter is the bitwise OR of a set of flags that affects how the match is performed. Passing the flag REX_BACKWARD causes the match to proceed backwards through the subject string. Passing the flags REX_NOT_BOL and/or REX_NOT_EOL causes the begin and end of the subject string NOT to be considered a line start or line end. The flag REX_NOT_EMPTY causes a match to fail if the empty string was matched.

See also:

Constructor & Destructor Documentation

FX::FXRex::FXRex (   )  [inline]
 

Construct empty regular expression object.

FX::FXRex::FXRex (  const FXRex &  orig  ) 
 

Copy regular expression object.

FX::FXRex::FXRex (  const FXchar *  pattern,
FXint  mode = REX_NORMAL,
FXRexError *  error = NULL
) 
 

Compile expression from pattern; if error is not NULL, error code is returned.

FX::FXRex::FXRex (  const FXString &  pattern,
FXint  mode = REX_NORMAL,
FXRexError *  error = NULL
) 
 

Compile expression from pattern; if error is not NULL, error code is returned.

FX::FXRex::~FXRex (   ) 
 

Delete.

Member Function Documentation

FXRex& FX::FXRex::operator= (  const FXRex &  orig  ) 
 

Assign another regular expression to this one.

FXbool FX::FXRex::empty (   )  const [inline]
 

See if regular expression is empty; the regular expression will be empty when it is unable to parse a pattern due to a syntax error.

FXRexError FX::FXRex::parse (  const FXchar *  pattern,
FXint  mode = REX_NORMAL
) 
 

Parse pattern, return error code if syntax error is found.

FXRexError FX::FXRex::parse (  const FXString &  pattern,
FXint  mode = REX_NORMAL
) 
 

Parse pattern, return error code if syntax error is found.

FXbool FX::FXRex::match (  const FXchar *  string,
FXint  len,
FXint *  beg = NULL,
FXint *  end = NULL,
FXint  mode = REX_FORWARD,
FXint  npar = 1,
FXint  fm = 0,
FXint  to = 2147483647
)  const
 

Match a subject string of length len, returning TRUE if a match is found and FALSE otherwise.

The entire pattern is captured in beg[0] and end[0], where beg[0] refers to the position of the first matched character and end[0] refers to the position after the last matched character. Sub expressions from capturing parenthesis i are returned in beg[i] and end[i].

FXbool FX::FXRex::match (  const FXString &  string,
FXint *  beg = NULL,
FXint *  end = NULL,
FXint  mode = REX_FORWARD,
FXint  npar = 1,
FXint  fm = 0,
FXint  to = 2147483647
)  const
 

Search for match in a string.

FXString FX::FXRex::substitute (  const FXchar *  string,
FXint  len,
FXint *  beg,
FXint *  end,
const FXString &  replace,
FXint  npar = 1
)  [static]
 

After performing a regular expression match with capturing parentheses, a substitution string is build from the replace string, where where "&" is replaced by the entire matched pattern, and "\1" through "\9" are replaced by captured expressions.

The original source string and its length, and the match arrays beg and end must be passed.

FXString FX::FXRex::substitute (  const FXString &  string,
FXint *  beg,
FXint *  end,
const FXString &  replace,
FXint  npar = 1
)  [static]
 

Return substitution string.

const FXchar* FX::FXRex::getError (  FXRexError  err  )  [inline, static]
 

Returns error code for given error.

Friends And Related Function Documentation

FXbool operator== (  const FXRex &  r1,
const FXRex &  r2
)  [friend]
 

Comparison operators.

FXStream& operator<< (  FXStream &  store,
const FXRex &  s
)  [friend]
 

Saving and loading.

Copyright © 1997-2005 Jeroen van der Zijp