Regular expression class.

'^'             // start-of-line anchor
'$'             // end-of-line anchor
'.'             // matches any character
'['             // start a character class
']'             // end a character class
'^'             // negates character class if 1st character
'*'             // Kleene closure (matches 0 or more)
'+'             // Positive closure (1 or more)
'?'             // Optional closure (0 or 1)

Note that the '|' operator (union) is not supported, nor are parentheses (grouping). Therefore "a|b" does not match "a".

Standard classes like [:alnum:], [:alpha:], etc. are not supported, only [a-zA-Z], [^ntf] and so on.

Definition at line 35 of file TRegexp.h.

Public Types
enum	EStatVal { kOK = 0, kIllegal, kNomem, kToolong }

Public Member Functions
	TRegexp (const char *re, Bool_t wildcard=kFALSE)

	TRegexp (const TString &re)
	Create a regular expression from a TString. More...

	TRegexp (const TRegexp &re)
	Copy ctor. More...

virtual	~TRegexp ()
	Destructor. More...

TRegexp &	operator= (const TRegexp &re)
	Assignment operator. More...

TRegexp &	operator= (const TString &re)
	Assignment operator taking a TString. More...

TRegexp &	operator= (const char *re)
	Assignment operator taking a char* and assigning it to a regexp. More...

Ssiz_t	Index (const TString &str, Ssiz_t *len, Ssiz_t start=0) const
	Find the first occurrence of the regexp in string and return the position, or -1 if there is no match. More...

EStatVal	Status ()
	Check status of regexp. More...

Private Member Functions
void	CopyPattern (const TRegexp &re)
	Copy the regular expression pattern. More...

void	GenPattern (const char *re)
	Generate the regular expression pattern. More...

const char *	MakeWildcard (const char *re)
	This routine transforms a wildcarding regular expression into a general regular expression used for pattern matching. More...

Private Attributes
Pattern_t *	fPattern

EStatVal	fStat

Static Private Attributes
static const unsigned	fgMaxpat = 2048

#include <TRegexp.h>

Member Enumeration Documentation

enum TRegexp::EStatVal

Enumerator
kOK
kIllegal
kNomem
kToolong

Definition at line 38 of file TRegexp.h.

Constructor & Destructor Documentation

TRegexp::TRegexp	(	const char *	re,
		Bool_t	wildcard = `kFALSE`
	)

TRegexp::TRegexp ( const TString & re )

Create a regular expression from a TString.

Definition at line 61 of file TRegexp.cxx.

TRegexp::TRegexp ( const TRegexp & re )

Copy ctor.

Definition at line 69 of file TRegexp.cxx.

TRegexp::~TRegexp ( )

virtual

Destructor.

Definition at line 77 of file TRegexp.cxx.

Member Function Documentation

void TRegexp::CopyPattern ( const TRegexp & re )

private

Copy the regular expression pattern.

Definition at line 127 of file TRegexp.cxx.

Referenced by operator=(), and TRegexp().

void TRegexp::GenPattern ( const char * re )

private

Generate the regular expression pattern.

Definition at line 117 of file TRegexp.cxx.

Referenced by operator=(), and TRegexp().

Ssiz_t TRegexp::Index	(	const TString &	string,
		Ssiz_t *	len,
		Ssiz_t	i = `0`
	)		const

Find the first occurrence of the regexp in string and return the position, or -1 if there is no match.

Len is length of the matched string and i is the offset at which the matching should start.

Definition at line 208 of file TRegexp.cxx.

Referenced by TAuthenticate::CheckHost(), TSystem::CompileMacro(), TMLPAnalyzer::GatherInformations(), TString::Index(), RooStats::HistFactory::HistFactoryNavigation::SetConstant(), and TNeuron::UseBranch().

const char * TRegexp::MakeWildcard ( const char * re )

private

This routine transforms a wildcarding regular expression into a general regular expression used for pattern matching.

When using wildcards the regular expression is assumed to be preceded by a "^" (BOL) and terminated by a "$" (EOL). Also, all "*"'s and "?"'s (closures) are assumed to be preceded by a "." (i.e. any character, except "/"'s) and all .'s are escaped (so *.ps is different from *.eps). The special treatment of "/" allows the easy matching of pathnames, e.g. "*.root" will match "aap.root", but not "pipo/aap.root".

Definition at line 144 of file TRegexp.cxx.

TRegexp & TRegexp::operator= ( const TRegexp & re )

Assignment operator.

Definition at line 85 of file TRegexp.cxx.

TRegexp & TRegexp::operator= ( const TString & re )

Assignment operator taking a TString.

Definition at line 107 of file TRegexp.cxx.

TRegexp & TRegexp::operator= ( const char * re )

Assignment operator taking a char* and assigning it to a regexp.

Definition at line 97 of file TRegexp.cxx.

TRegexp::EStatVal TRegexp::Status ( )

Check status of regexp.

Definition at line 230 of file TRegexp.cxx.

Referenced by RooMapCatEntry::ok(), and RooMappedCategory::Entry::ok().

Member Data Documentation

const unsigned TRegexp::fgMaxpat = 2048

staticprivate

Definition at line 43 of file TRegexp.h.

Referenced by CopyPattern(), GenPattern(), and MakeWildcard().

Pattern_t* TRegexp::fPattern

private

Definition at line 41 of file TRegexp.h.

Referenced by CopyPattern(), GenPattern(), Index(), operator=(), and ~TRegexp().

EStatVal TRegexp::fStat

private

Definition at line 42 of file TRegexp.h.

Referenced by CopyPattern(), GenPattern(), Index(), and Status().

The documentation for this class was generated from the following files:

core/base/inc/TRegexp.h
core/base/src/TRegexp.cxx

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation