Basic string class.

Cannot be stored in a TCollection... use TObjString instead.

The underlying string is stored as a char* that can be accessed via TString::Data(). TString provides Short String Optimization (SSO) so that short strings (<15 on 64-bit and <11 on 32-bit) are contained in the TString internal data structure without the need for mallocing the required space.

Substring operations are provided by the TSubString class, which holds a reference to the original string and its data, along with the offset and length of the substring. To retrieve the substring as a TString, construct a TString from it, eg:

root [0] TString s("hello world")
root [1] TString s2( s(0,5) )
root [2] s2
(class TString)"hello"

Definition at line 139 of file TString.h.

Classes
struct	LongStr_t

struct	RawStr_t

struct	Rep_t

struct	ShortStr_t

union	UStr_t

Public Types
enum	ECaseCompare { kExact , kIgnoreCase }

enum	EStripType { kLeading = 0x1 , kTrailing = 0x2 , kBoth = 0x3 }

Public Member Functions
	TString ()
	TString default ctor.

	TString (char c)
	Initialize a string with a single character.

	TString (char c, Ssiz_t s)
	Initialize the first n locations of a TString with character c.

	TString (const char *s)
	Create TString and initialize it with string cs.

	TString (const char *s, Ssiz_t n)
	Create TString and initialize it with the first n characters of cs.

	TString (const std::string &s)
	Create TString and initialize it with string cs.

	TString (const std::string_view &sub)
	Copy a std::string_view in a TString.

	TString (const TString &s)
	Copy constructor.

	TString (const TSubString &sub)
	Copy a TSubString in a TString.

	TString (Ssiz_t ic)
	Create TString able to contain ic characters.

	TString (TString &&s) noexcept
	Move constructor.

virtual	~TString ()
	Delete a TString.

TString &	Append (char c, Ssiz_t rep=1)
	Append character c rep times to string.

TString &	Append (const char *cs)

TString &	Append (const char *cs, Ssiz_t n)

TString &	Append (const TString &s)

TString &	Append (const TString &s, Ssiz_t n)

Double_t	Atof () const
	Return floating-point value contained in string.

Int_t	Atoi () const
	Return integer value of string.

Long64_t	Atoll () const
	Return long long value of string.

Bool_t	BeginsWith (const char *s, ECaseCompare cmp=kExact) const

Bool_t	BeginsWith (const TString &pat, ECaseCompare cmp=kExact) const

Ssiz_t	Capacity () const

Ssiz_t	Capacity (Ssiz_t n)
	Return string capacity.

TString &	Chop ()

void	Clear ()
	Clear string without changing its capacity.

int	CompareTo (const char *cs, ECaseCompare cmp=kExact) const
	Compare a string to char *cs2.

int	CompareTo (const TString &st, ECaseCompare cmp=kExact) const
	Compare a string to another string.

Bool_t	Contains (const char *pat, ECaseCompare cmp=kExact) const

Bool_t	Contains (const TRegexp &pat) const

Bool_t	Contains (const TString &pat, ECaseCompare cmp=kExact) const

Bool_t	Contains (TPRegexp &pat) const

TString	Copy () const
	Copy a string.

Int_t	CountChar (Int_t c) const
	Return number of times character c occurs in the string.

const char *	Data () const

Bool_t	EndsWith (const char *pat, ECaseCompare cmp=kExact) const
	Return true if string ends with the specified string.

Bool_t	EqualTo (const char *cs, ECaseCompare cmp=kExact) const

Bool_t	EqualTo (const TString &st, ECaseCompare cmp=kExact) const

virtual void	FillBuffer (char *&buffer) const
	Copy string into I/O buffer.

Ssiz_t	First (char c) const
	Find first occurrence of a character c.

Ssiz_t	First (const char *cs) const
	Find first occurrence of a character in cs.

void	Form (const char *fmt,...)
	Formats a string using a printf style format descriptor.

Bool_t	Gets (FILE *fp, Bool_t chop=kTRUE)
	Read one line from the stream, including the `\n`, or until EOF.

UInt_t	Hash (ECaseCompare cmp=kExact) const
	Return hash value.

Ssiz_t	Index (const char *pat, Ssiz_t i=0, ECaseCompare cmp=kExact) const

Ssiz_t	Index (const char *pat, Ssiz_t patlen, Ssiz_t i, ECaseCompare cmp) const
	Search for a string in the TString.

Ssiz_t	Index (const TRegexp &pat, Ssiz_t *ext, 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.

Ssiz_t	Index (const TRegexp &pat, 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.

Ssiz_t	Index (const TString &s, Ssiz_t i=0, ECaseCompare cmp=kExact) const

Ssiz_t	Index (const TString &s, Ssiz_t patlen, Ssiz_t i, ECaseCompare cmp) const

Ssiz_t	Index (TPRegexp &pat, Ssiz_t *ext, Ssiz_t i=0) const
	Find the first occurrence of the regexp in string and return the position.

Ssiz_t	Index (TPRegexp &pat, Ssiz_t i=0) const
	Find the first occurrence of the regexp in string and return the position.

TString &	Insert (Ssiz_t pos, const char *s)

TString &	Insert (Ssiz_t pos, const char *s, Ssiz_t extent)

TString &	Insert (Ssiz_t pos, const TString &s)

TString &	Insert (Ssiz_t pos, const TString &s, Ssiz_t extent)

virtual TClass *	IsA () const

Bool_t	IsAlnum () const
	Returns true if all characters in string are alphanumeric.

Bool_t	IsAlpha () const
	Returns true if all characters in string are alphabetic.

Bool_t	IsAscii () const
	Returns true if all characters in string are ascii.

Bool_t	IsBin () const
	Returns true if all characters in string are binary digits (0,1).

Bool_t	IsDec () const
	Returns true if all characters in string are decimal digits (0-9).

Bool_t	IsDigit () const
	Returns true if all characters in string are digits (0-9) or white spaces, i.e.

Bool_t	IsFloat () const
	Returns kTRUE if string contains a floating point or integer number.

Bool_t	IsHex () const
	Returns true if all characters in string are hexadecimal digits (0-9,a-f,A-F).

Bool_t	IsInBaseN (Int_t base) const
	Returns true if all characters in string are expressed in the base specified (range=2-36), i.e.

Bool_t	IsNull () const

Bool_t	IsOct () const
	Returns true if all characters in string are octal digits (0-7).

Bool_t	IsWhitespace () const

Ssiz_t	Last (char c) const
	Find last occurrence of a character c.

Ssiz_t	Length () const

Bool_t	MaybeRegexp () const
	Returns true if string contains one of the regexp characters "^$.[]*+?".

Bool_t	MaybeWildcard () const
	Returns true if string contains one of the wildcard characters "[]*?".

TString	MD5 () const
	Return the MD5 digest for this string, in a string representation.

	operator const char * () const

TSubString	operator() (const TRegexp &re) const
	Return the substring found by applying the regexp.

TSubString	operator() (const TRegexp &re, Ssiz_t start) const
	Return the substring found by applying the regexp starting at start.

char &	operator() (Ssiz_t i)

char	operator() (Ssiz_t i) const

TSubString	operator() (Ssiz_t start, Ssiz_t len) const
	Return sub-string of string starting at start with length len.

TSubString	operator() (TPRegexp &re) const
	Return the substring found by applying the regexp.

TSubString	operator() (TPRegexp &re, Ssiz_t start) const
	Return the substring found by applying the regexp starting at start.

TString &	operator+= (char c)

TString &	operator+= (const char *s)

TString &	operator+= (const TString &s)

template<class T >
std::enable_if< ROOT::TypeTraits::IsFloatNumeral< T >::value, TString >::type &	operator+= (T f)

template<class T >
std::enable_if< ROOT::TypeTraits::IsSignedNumeral< T >::value, TString >::type &	operator+= (T i)

template<class T >
std::enable_if< ROOT::TypeTraits::IsUnsignedNumeral< T >::value, TString >::type &	operator+= (T u)

TString &	operator= (char s)
	Assign character c to TString.

TString &	operator= (const char *s)
	Assign string cs to TString.

TString &	operator= (const std::string &s)
	Assign std::string s to TString.

TString &	operator= (const std::string_view &s)
	Assign std::string s to TString.

TString &	operator= (const TString &s)
	Assignment operator.

TString &	operator= (const TSubString &s)
	Assign a TSubString substr to TString.

TString &	operator= (TString &&s) noexcept
	Move-Assignment operator.

char &	operator[] (Ssiz_t i)

char	operator[] (Ssiz_t i) const

TString &	Prepend (char c, Ssiz_t rep=1)
	Prepend character c rep times to string.

TString &	Prepend (const char *cs)

TString &	Prepend (const char *cs, Ssiz_t n)

TString &	Prepend (const TString &s)

TString &	Prepend (const TString &s, Ssiz_t n)

void	Puts (FILE *fp)
	Write string to the stream.

virtual void	ReadBuffer (char *&buffer)
	Read string from I/O buffer.

std::istream &	ReadFile (std::istream &str)
	Replace string with the contents of strm, stopping at an EOF.

std::istream &	ReadLine (std::istream &str, Bool_t skipWhite=kTRUE)
	Read a line from stream upto newline skipping any whitespace.

std::istream &	ReadString (std::istream &str)
	Read a line from stream upto \0, including any newline.

std::istream &	ReadToDelim (std::istream &str, char delim='\n')
	Read up to an EOF, or a delimiting character, whichever comes first.

std::istream &	ReadToken (std::istream &str)
	Read a token, delimited by whitespace, from the input stream.

TString &	Remove (EStripType s, char c)
	Remove char c at begin and/or end of string (like Strip()) but modifies directly the string.

TString &	Remove (Ssiz_t pos)

TString &	Remove (Ssiz_t pos, Ssiz_t n)

TString &	Replace (Ssiz_t pos, Ssiz_t n, const char *s)

TString &	Replace (Ssiz_t pos, Ssiz_t n, const char *s, Ssiz_t ns)
	Remove at most n1 characters from self beginning at pos, and replace them with the first n2 characters of cs.

TString &	Replace (Ssiz_t pos, Ssiz_t n, const TString &s)

TString &	Replace (Ssiz_t pos, Ssiz_t n1, const TString &s, Ssiz_t n2)

TString &	ReplaceAll (const char s1, const char s2)

TString &	ReplaceAll (const char *s1, const TString &s2)

TString &	ReplaceAll (const char s1, Ssiz_t ls1, const char s2, Ssiz_t ls2)
	Find & Replace ls1 symbols of s1 with ls2 symbols of s2 if any.

TString &	ReplaceAll (const TString &s1, const char *s2)

TString &	ReplaceAll (const TString &s1, const TString &s2)

TString &	ReplaceSpecialCppChars ()
	Find special characters which are typically used in `printf()` calls and replace them by appropriate escape sequences.

void	Resize (Ssiz_t n)
	Resize the string. Truncate or add blanks as necessary.

virtual Int_t	Sizeof () const
	Returns size string will occupy on I/O buffer.

virtual void	Streamer (TBuffer &)
	Stream a string object.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

TSubString	Strip (EStripType s=kTrailing, char c=' ') const
	Return a substring of self stripped at beginning and/or end.

TSubString	SubString (const char *pat, Ssiz_t start=0, ECaseCompare cmp=kExact) const
	Returns a substring matching "pattern", or the null substring if there is no such match.

TString &	Swap (TString &other)

TObjArray *	Tokenize (const TString &delim) const
	This function is used to isolate sequential tokens in a TString.

Bool_t	Tokenize (TString &tok, Ssiz_t &from, const char *delim=" ") const
	Search for tokens delimited by regular expression 'delim' (default " ") in this string; search starts at 'from' and the token is returned in 'tok'.

void	ToLower ()
	Change string to lower-case.

void	ToUpper ()
	Change string to upper case.

std::string_view	View () const

Static Public Member Functions
static TString	BaseConvert (const TString &s_in, Int_t base_in, Int_t base_out)
	Converts string from base base_in to base base_out.

static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

static TString	Format (const char *fmt,...)
	Static method which formats a string using a printf style format descriptor and return a TString.

static Ssiz_t	GetInitialCapacity ()

static Ssiz_t	GetMaxWaste ()

static Ssiz_t	GetResizeIncrement ()

static UInt_t	Hash (const void *txt, Int_t ntxt)
	Calculates hash index from any char string.

static Ssiz_t	InitialCapacity (Ssiz_t ic=15)
	Set default initial capacity for all TStrings. Default is 15.

static TString	Itoa (Int_t value, Int_t base)
	Converts an Int_t to a TString with respect to the base specified (2-36).

static TString	LLtoa (Long64_t value, Int_t base)
	Converts a Long64_t to a TString with respect to the base specified (2-36).

static Ssiz_t	MaxWaste (Ssiz_t mw=15)
	Set maximum space that may be wasted in a string before doing a resize.

static TString *	ReadString (TBuffer &b, const TClass *clReq)
	Read TString object from buffer.

static Ssiz_t	ResizeIncrement (Ssiz_t ri=16)
	Set default resize increment for all TStrings. Default is 16.

static TString	UItoa (UInt_t value, Int_t base)
	Converts a UInt_t (twice the range of an Int_t) to a TString with respect to the base specified (2-36).

static TString	ULLtoa (ULong64_t value, Int_t base)
	Converts a ULong64_t (twice the range of an Long64_t) to a TString with respect to the base specified (2-36).

static void	WriteString (TBuffer &b, const TString *a)
	Write TString object to buffer.

Static Public Attributes
static const Ssiz_t	kNPOS = ::kNPOS

Protected Types
enum	{ kAlignment = 16 }

Protected Member Functions
	TString (const char a1, Ssiz_t n1, const char a2, Ssiz_t n2)
	String data.

void	AssertElement (Ssiz_t nc) const
	Check to make sure a string index is in range.

void	Clobber (Ssiz_t nc)
	Clear string and make sure it has a capacity of nc.

void	InitChar (char c)
	Initialize a string with a single character.

Static Protected Member Functions
static Ssiz_t	AdjustCapacity (Ssiz_t oldCap, Ssiz_t newCap)
	Calculate a nice capacity greater than or equal to newCap.

static Ssiz_t	Align (Ssiz_t s)

static Ssiz_t	Recommend (Ssiz_t s)

Protected Attributes
Rep_t	fRep

Private Types
enum	{ kShortMask = 0x80 , kLongMask = 0x80000000 }

enum

enum	{ kNwords = sizeof(UStr_t) / sizeof(Ssiz_t) }

Private Member Functions
void	Clone (Ssiz_t nc)
	Make self a distinct copy with capacity of at least tot, where tot cannot be smaller than the current length.

void	FormImp (const char *fmt, va_list ap)
	Formats a string using a printf style format descriptor.

Ssiz_t	GetLongCap () const

char *	GetLongPointer ()

const char *	GetLongPointer () const

Ssiz_t	GetLongSize () const

char *	GetPointer ()

const char *	GetPointer () const

char *	GetShortPointer ()

const char *	GetShortPointer () const

Ssiz_t	GetShortSize () const

UInt_t	HashCase () const
	Return a case-sensitive hash value (endian independent).

UInt_t	HashFoldCase () const
	Return a case-insensitive hash value (endian independent).

char *	Init (Ssiz_t capacity, Ssiz_t nchar)
	Private member function returning an empty string representation of size capacity and containing nchar characters.

Bool_t	IsLong () const

void	SetLongCap (Ssiz_t s)

void	SetLongPointer (char *p)

void	SetLongSize (Ssiz_t s)

void	SetShortSize (Ssiz_t s)

void	SetSize (Ssiz_t s)

void	UnLink () const

void	Zero ()

Static Private Member Functions
static Ssiz_t	MaxSize ()

Friends
TString	operator+ (char c, const TString &s)
	Add string to char.

TString	operator+ (const char *cs, const TString &s)
	Use the special concatenation constructor.

TString	operator+ (const TString &s, char c)
	Add char to string.

TString	operator+ (const TString &s, const char *cs)
	Use the special concatenation constructor.

TString	operator+ (const TString &s1, const TString &s2)
	Use the special concatenation constructor.

template<class T >
std::enable_if< ROOT::TypeTraits::IsFloatNumeral< T >::value, TString >::type	operator+ (T f, const TString &s)

template<class T >
std::enable_if< ROOT::TypeTraits::IsSignedNumeral< T >::value, TString >::type	operator+ (T i, const TString &s)

template<class T >
std::enable_if< ROOT::TypeTraits::IsUnsignedNumeral< T >::value, TString >::type	operator+ (T u, const TString &s)

template<class T >
std::enable_if< ROOT::TypeTraits::IsFloatNumeral< T >::value, TString >::type	operator+ (TString s, T f)

template<class T >
std::enable_if< ROOT::TypeTraits::IsSignedNumeral< T >::value, TString >::type	operator+ (TString s, T i)

template<class T >
std::enable_if< ROOT::TypeTraits::IsUnsignedNumeral< T >::value, TString >::type	operator+ (TString s, T u)

TBuffer &	operator<< (TBuffer &b, const TString *obj)
	Write TString or derived to TBuffer.

Bool_t	operator== (const TString &s1, const char *s2)
	Compare TString with a char *.

Bool_t	operator== (const TString &s1, const TString &s2)

class	TBufferFile

class	TStringLong

class	TSubString

#include <TString.h>

Inheritance diagram for TString:

[legend]

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

private

Enumerator
kShortMask
kLongMask

Definition at line 185 of file TString.h.

◆ anonymous enum

anonymous enum

private

Definition at line 195 of file TString.h.

◆ anonymous enum

anonymous enum

private

Enumerator
kNwords

Definition at line 206 of file TString.h.

◆ anonymous enum

anonymous enum

protected

Enumerator
kAlignment

Definition at line 234 of file TString.h.

◆ ECaseCompare

enum TString::ECaseCompare

Enumerator
kExact
kIgnoreCase

Definition at line 279 of file TString.h.

◆ EStripType

enum TString::EStripType

Enumerator
kLeading
kTrailing
kBoth

Definition at line 278 of file TString.h.

Constructor & Destructor Documentation

◆ TString() [1/12]

TString::TString	(	const char *	a1,
		Ssiz_t	n1,
		const char *	a2,
		Ssiz_t	n2
	)

protected

String data.

Special constructor to initialize with the concatenation of a1 and a2.

Definition at line 224 of file TString.cxx.

◆ TString() [2/12]

TString::TString ( )

TString default ctor.

Definition at line 88 of file TString.cxx.

◆ TString() [3/12]

TString::TString ( Ssiz_t ic )

explicit

Create TString able to contain ic characters.

Definition at line 96 of file TString.cxx.

◆ TString() [4/12]

TString::TString ( const TString & s )

Copy constructor.

Definition at line 180 of file TString.cxx.

◆ TString() [5/12]

TString::TString ( TString && s )

noexcept

Move constructor.

Definition at line 194 of file TString.cxx.

◆ TString() [6/12]

TString::TString ( const char * s )

Create TString and initialize it with string cs.

Definition at line 104 of file TString.cxx.

◆ TString() [7/12]

TString::TString	(	const char *	s,
		Ssiz_t	n
	)

Create TString and initialize it with the first n characters of cs.

Definition at line 127 of file TString.cxx.

◆ TString() [8/12]

TString::TString ( const std::string & s )

Create TString and initialize it with string cs.

Definition at line 117 of file TString.cxx.

◆ TString() [9/12]

TString::TString ( char c )

Initialize a string with a single character.

Definition at line 158 of file TString.cxx.

◆ TString() [10/12]

TString::TString	(	char	c,
		Ssiz_t	s
	)

Initialize the first n locations of a TString with character c.

Definition at line 166 of file TString.cxx.

◆ TString() [11/12]

TString::TString ( const std::string_view & sub )

explicit

Copy a std::string_view in a TString.

Definition at line 204 of file TString.cxx.

◆ TString() [12/12]

TString::TString ( const TSubString & sub )

Copy a TSubString in a TString.

Definition at line 214 of file TString.cxx.

◆ ~TString()

TString::~TString ( )

virtual

Delete a TString.

Definition at line 247 of file TString.cxx.

Member Function Documentation

◆ AdjustCapacity()

Ssiz_t TString::AdjustCapacity	(	Ssiz_t	oldCap,
		Ssiz_t	newCap
	)

staticprotected

Calculate a nice capacity greater than or equal to newCap.

Definition at line 1207 of file TString.cxx.

◆ Align()

static Ssiz_t TString::Align ( Ssiz_t s )

inlinestaticprotected

Definition at line 235 of file TString.h.

◆ Append() [1/5]

TString & TString::Append	(	char	c,
		Ssiz_t	rep = `1`
	)

Append character c rep times to string.

Definition at line 391 of file TString.cxx.

◆ Append() [2/5]

TString & TString::Append ( const char * cs )

inline

Definition at line 573 of file TString.h.

◆ Append() [3/5]

TString & TString::Append	(	const char *	cs,
		Ssiz_t	n
	)

inline

Definition at line 576 of file TString.h.

◆ Append() [4/5]

TString & TString::Append ( const TString & s )

inline

Definition at line 579 of file TString.h.

◆ Append() [5/5]

TString & TString::Append	(	const TString &	s,
		Ssiz_t	n
	)

inline

Definition at line 582 of file TString.h.

◆ AssertElement()

void TString::AssertElement ( Ssiz_t nc ) const

protected

Check to make sure a string index is in range.

Definition at line 1197 of file TString.cxx.

◆ Atof()

Double_t TString::Atof ( ) const

Return floating-point value contained in string.

Examples of valid strings are:

64320
320
4 3 2 0
4320     6,4320
43e20   6.43E20    6,43e20
43e-20  6.43E-20   6,43e-20

Definition at line 2033 of file TString.cxx.

◆ Atoi()

Int_t TString::Atoi ( ) const

Return integer value of string.

Valid strings include only digits and whitespace (see IsDigit()), i.e. "123456", "123 456" and "1 2 3 4 56" are all valid integer strings whose Atoi() value is 123456.

Definition at line 1967 of file TString.cxx.

◆ Atoll()

Long64_t TString::Atoll ( ) const

Return long long value of string.

Valid strings include only digits and whitespace (see IsDigit()), i.e. "123456", "123 456" and "1 2 3 4 56" are all valid integer strings whose Atoll() value is 123456.

Definition at line 1993 of file TString.cxx.

◆ BaseConvert()

TString TString::BaseConvert	(	const TString &	s_in,
		Int_t	base_in,
		Int_t	base_out
	)

static

Converts string from base base_in to base base_out.

Supported bases are 2-36. At most 64 bit data can be converted.

Definition at line 2173 of file TString.cxx.

◆ BeginsWith() [1/2]

Bool_t TString::BeginsWith	(	const char *	s,
		ECaseCompare	cmp = `kExact`
	)		const

inline

Definition at line 624 of file TString.h.

◆ BeginsWith() [2/2]

Bool_t TString::BeginsWith	(	const TString &	pat,
		ECaseCompare	cmp = `kExact`
	)		const

inline

Definition at line 627 of file TString.h.

◆ Capacity() [1/2]

Ssiz_t TString::Capacity ( ) const

inline

Definition at line 365 of file TString.h.

◆ Capacity() [2/2]

Ssiz_t TString::Capacity ( Ssiz_t nc )

Return string capacity.

If nc != current capacity Clone() the string in a string with the desired capacity.

Definition at line 436 of file TString.cxx.

◆ Chop()

TString & TString::Chop ( )

inline

Definition at line 688 of file TString.h.

◆ Class()

static TClass * TString::Class ( )

static

Returns: TClass describing this class

◆ Class_Name()

static const char * TString::Class_Name ( )

static

Returns: Name of this class

◆ Class_Version()

static constexpr Version_t TString::Class_Version ( )

inlinestaticconstexpr

Returns: Version of this class

Definition at line 474 of file TString.h.

◆ Clear()

void TString::Clear ( )

Clear string without changing its capacity.

Definition at line 1222 of file TString.cxx.

◆ Clobber()

void TString::Clobber ( Ssiz_t nc )

protected

Clear string and make sure it has a capacity of nc.

Definition at line 1230 of file TString.cxx.

◆ Clone()

void TString::Clone ( Ssiz_t tot )

private

Make self a distinct copy with capacity of at least tot, where tot cannot be smaller than the current length.

Preserve previous contents.

Definition at line 1258 of file TString.cxx.

◆ CompareTo() [1/2]

int TString::CompareTo	(	const char *	cs2,
		ECaseCompare	cmp = `kExact`
	)		const

Compare a string to char *cs2.

Returns returns zero if the two strings are identical, otherwise returns the difference between the first two differing bytes (treated as unsigned char values, so that ‘\200’ is greater than ‘\0’, for example). Zero-length strings are always identical.

Definition at line 451 of file TString.cxx.

◆ CompareTo() [2/2]

int TString::CompareTo	(	const TString &	str,
		ECaseCompare	cmp = `kExact`
	)		const

Compare a string to another string.

Returns returns zero if the two strings are identical, otherwise returns the difference between the first two differing bytes (treated as unsigned char values, so that ‘\200’ is greater than ‘\0’, for example). Zero-length strings are always identical.

Definition at line 481 of file TString.cxx.

◆ Contains() [1/4]

Bool_t TString::Contains	(	const char *	pat,
		ECaseCompare	cmp = `kExact`
	)		const

inline

Definition at line 633 of file TString.h.

◆ Contains() [2/4]

Bool_t TString::Contains ( const TRegexp & pat ) const

inline

Definition at line 636 of file TString.h.

◆ Contains() [3/4]

Bool_t TString::Contains	(	const TString &	pat,
		ECaseCompare	cmp = `kExact`
	)		const

inline

Definition at line 630 of file TString.h.

◆ Contains() [4/4]

Bool_t TString::Contains ( TPRegexp & pat ) const

inline

Definition at line 639 of file TString.h.

◆ Copy()

TString TString::Copy ( ) const

Copy a string.

Definition at line 523 of file TString.cxx.

◆ CountChar()

Int_t TString::CountChar ( Int_t c ) const

Return number of times character c occurs in the string.

Definition at line 509 of file TString.cxx.

◆ Data()

const char * TString::Data ( ) const

inline

Definition at line 377 of file TString.h.

◆ DeclFileName()

static const char * TString::DeclFileName ( )

inlinestatic

Returns: Name of the file containing the class declaration

Definition at line 474 of file TString.h.

◆ EndsWith()

Bool_t TString::EndsWith	(	const char *	pat,
		ECaseCompare	cmp = `kExact`
	)		const

Return true if string ends with the specified string.

Definition at line 2223 of file TString.cxx.

◆ EqualTo() [1/2]

Bool_t TString::EqualTo	(	const char *	cs,
		ECaseCompare	cmp = `kExact`
	)		const

inline

Definition at line 642 of file TString.h.

◆ EqualTo() [2/2]

Bool_t TString::EqualTo	(	const TString &	st,
		ECaseCompare	cmp = `kExact`
	)		const

inline

Definition at line 645 of file TString.h.

◆ FillBuffer()

void TString::FillBuffer ( char *& buffer ) const

virtual

Copy string into I/O buffer.

Reimplemented in TStringLong.

Definition at line 1289 of file TString.cxx.

◆ First() [1/2]

Ssiz_t TString::First ( char c ) const

Find first occurrence of a character c.

Definition at line 532 of file TString.cxx.

◆ First() [2/2]

Ssiz_t TString::First ( const char * cs ) const

Find first occurrence of a character in cs.

Definition at line 541 of file TString.cxx.

◆ Form()

void TString::Form	(	const char *	fmt,
			...
	)

Formats a string using a printf style format descriptor.

Existing string contents will be overwritten. See also the static version TString::Format

TString formatted;
formatted.Form("%s in <%s>: %s", type, location, msg);
 
lines.emplace_back(TString::Format("Welcome to ROOT %s%%shttp://root.cern.ch",
                   gROOT->GetVersion()));

Note: this is not to be confused with Format and Form (in the global namespace) which returns a const char* and relies on a thread-local static character buffer.

Definition at line 2335 of file TString.cxx.

◆ Format()

TString TString::Format	(	const char *	fmt,
			...
	)

static

Static method which formats a string using a printf style format descriptor and return a TString.

Similar to TString::Form() but it is not needed to first create a TString.

lines.emplace_back(TString::Format("Welcome to ROOT %s%%shttp://root.cern.ch",
                   gROOT->GetVersion()));
TString formatted;
formatted.Form("%s in <%s>: %s", type, location, msg);

Note: this is not to be confused with Format and Form (in the global namespace) which returns a const char* and relies on a thread-local static character buffer.

Definition at line 2357 of file TString.cxx.

◆ FormImp()

void TString::FormImp	(	const char *	fmt,
		va_list	ap
	)

private

Formats a string using a printf style format descriptor.

Existing string contents will be overwritten.

Definition at line 2289 of file TString.cxx.

◆ GetInitialCapacity()

Ssiz_t TString::GetInitialCapacity ( )

static

Definition at line 1547 of file TString.cxx.

◆ GetLongCap()

Ssiz_t TString::GetLongCap ( ) const

inlineprivate

Definition at line 252 of file TString.h.

◆ GetLongPointer() [1/2]

char * TString::GetLongPointer ( )

inlineprivate

Definition at line 254 of file TString.h.

◆ GetLongPointer() [2/2]

const char * TString::GetLongPointer ( ) const

inlineprivate

Definition at line 255 of file TString.h.

◆ GetLongSize()

Ssiz_t TString::GetLongSize ( ) const

inlineprivate

Definition at line 249 of file TString.h.

◆ GetMaxWaste()

Ssiz_t TString::GetMaxWaste ( )

static

Definition at line 1563 of file TString.cxx.

◆ GetPointer() [1/2]

char * TString::GetPointer ( )

inlineprivate

Definition at line 258 of file TString.h.

◆ GetPointer() [2/2]

const char * TString::GetPointer ( ) const

inlineprivate

Definition at line 259 of file TString.h.

◆ GetResizeIncrement()

Ssiz_t TString::GetResizeIncrement ( )

static

Definition at line 1555 of file TString.cxx.

◆ Gets()

Bool_t TString::Gets	(	FILE *	fp,
		Bool_t	chop = `kTRUE`
	)

Read one line from the stream, including the \n, or until EOF.

Remove the trailing [\r]\n if chop is true. Returns kTRUE if data was read.

Definition at line 198 of file Stringio.cxx.

◆ GetShortPointer() [1/2]

char * TString::GetShortPointer ( )

inlineprivate

Definition at line 256 of file TString.h.

◆ GetShortPointer() [2/2]

const char * TString::GetShortPointer ( ) const

inlineprivate

Definition at line 257 of file TString.h.

◆ GetShortSize()

Ssiz_t TString::GetShortSize ( ) const

inlineprivate

Definition at line 246 of file TString.h.

◆ Hash() [1/2]

UInt_t TString::Hash	(	const void *	txt,
		Int_t	ntxt
	)

static

Calculates hash index from any char string.

(static function)

For string: i = TString::Hash(string,nstring);
For int: i = TString::Hash(&intword,sizeof(int));
For pointer: i = TString::Hash(&pointer,sizeof(void*));

This employs two different hash functions, depending on ntxt:

ntxt == sizeof(void*): a simple bitwise xor to get fast pointer hashes
else: MurmurHash3_x64_128 http://code.google.com/p/smhasher/

Definition at line 844 of file TString.cxx.

◆ Hash() [2/2]

UInt_t TString::Hash ( ECaseCompare cmp = kExact ) const

Return hash value.

Definition at line 671 of file TString.cxx.

◆ HashCase()

UInt_t TString::HashCase ( ) const

private

Return a case-sensitive hash value (endian independent).

Definition at line 627 of file TString.cxx.

◆ HashFoldCase()

UInt_t TString::HashFoldCase ( ) const

private

Return a case-insensitive hash value (endian independent).

Definition at line 656 of file TString.cxx.

◆ Index() [1/8]

Ssiz_t TString::Index	(	const char *	pat,
		Ssiz_t	i = `0`,
		ECaseCompare	cmp = `kExact`
	)		const

inline

Definition at line 648 of file TString.h.

◆ Index() [2/8]

Ssiz_t TString::Index	(	const char *	pattern,
		Ssiz_t	plen,
		Ssiz_t	startIndex,
		ECaseCompare	cmp
	)		const

Search for a string in the TString.

Plen is the length of pattern, startIndex is the index from which to start and cmp selects the type of case-comparison.

Definition at line 895 of file TString.cxx.

◆ Index() [3/8]

Ssiz_t TString::Index	(	const TRegexp &	r,
		Ssiz_t *	extent,
		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.

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

Definition at line 261 of file TRegexp.cxx.

◆ Index() [4/8]

Ssiz_t TString::Index	(	const TRegexp &	r,
		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.

Start is the offset at which the search should start.

Definition at line 250 of file TRegexp.cxx.

◆ Index() [5/8]

Ssiz_t TString::Index	(	const TString &	s,
		Ssiz_t	i = `0`,
		ECaseCompare	cmp = `kExact`
	)		const

inline

Definition at line 651 of file TString.h.

◆ Index() [6/8]

Ssiz_t TString::Index	(	const TString &	s,
		Ssiz_t	patlen,
		Ssiz_t	i,
		ECaseCompare	cmp
	)		const

inline

Definition at line 654 of file TString.h.

◆ Index() [7/8]

Ssiz_t TString::Index	(	TPRegexp &	r,
		Ssiz_t *	extent,
		Ssiz_t	start = `0`
	)		const

Find the first occurrence of the regexp in string and return the position.

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

Definition at line 537 of file TPRegexp.cxx.

◆ Index() [8/8]

Ssiz_t TString::Index	(	TPRegexp &	r,
		Ssiz_t	start = `0`
	)		const

Find the first occurrence of the regexp in string and return the position.

Start is the offset at which the search should start.

Definition at line 522 of file TPRegexp.cxx.

◆ Init()

char * TString::Init	(	Ssiz_t	capacity,
		Ssiz_t	nchar
	)

private

Private member function returning an empty string representation of size capacity and containing nchar characters.

Definition at line 256 of file TString.cxx.

◆ InitChar()

void TString::InitChar ( char c )

protected

Initialize a string with a single character.

Definition at line 149 of file TString.cxx.

◆ InitialCapacity()

Ssiz_t TString::InitialCapacity ( Ssiz_t ic = 15 )

static

Set default initial capacity for all TStrings. Default is 15.

Definition at line 1572 of file TString.cxx.

◆ Insert() [1/4]

TString & TString::Insert	(	Ssiz_t	pos,
		const char *	s
	)

inline

Definition at line 658 of file TString.h.

◆ Insert() [2/4]

TString & TString::Insert	(	Ssiz_t	pos,
		const char *	s,
		Ssiz_t	extent
	)

inline

Definition at line 661 of file TString.h.

◆ Insert() [3/4]

TString & TString::Insert	(	Ssiz_t	pos,
		const TString &	s
	)

inline

Definition at line 664 of file TString.h.

◆ Insert() [4/4]

TString & TString::Insert	(	Ssiz_t	pos,
		const TString &	s,
		Ssiz_t	extent
	)

inline

Definition at line 667 of file TString.h.

◆ IsA()

virtual TClass * TString::IsA ( ) const

inlinevirtual

Returns: TClass describing current object

Reimplemented in TStringToken, TStringLong, TEveException, TGString, and TGHotString.

Definition at line 474 of file TString.h.

◆ IsAlnum()

Bool_t TString::IsAlnum ( ) const

Returns true if all characters in string are alphanumeric.

Returns false in case string length is 0.

Definition at line 1792 of file TString.cxx.

◆ IsAlpha()

Bool_t TString::IsAlpha ( ) const

Returns true if all characters in string are alphabetic.

Returns false in case string length is 0.

Definition at line 1777 of file TString.cxx.

◆ IsAscii()

Bool_t TString::IsAscii ( ) const

Returns true if all characters in string are ascii.

Definition at line 1764 of file TString.cxx.

◆ IsBin()

Bool_t TString::IsBin ( ) const

Returns true if all characters in string are binary digits (0,1).

Returns false in case string length is 0 or string contains other characters.

Definition at line 1887 of file TString.cxx.

◆ IsDec()

Bool_t TString::IsDec ( ) const

Returns true if all characters in string are decimal digits (0-9).

Returns false in case string length is 0 or string contains other characters.

Definition at line 1919 of file TString.cxx.

◆ IsDigit()

Bool_t TString::IsDigit ( ) const

Returns true if all characters in string are digits (0-9) or white spaces, i.e.

"123456" and "123 456" are both valid integer strings. Returns false in case string length is 0 or string contains other characters or only whitespace.

Definition at line 1809 of file TString.cxx.

◆ IsFloat()

Bool_t TString::IsFloat ( ) const

Returns kTRUE if string contains a floating point or integer number.

Examples of valid formats are:

64320
320
4 3 2 0
4320     6,4320
43e20   6.43E20    6,43e20
43e-20  6.43E-20   6,43e-20, -6.43e+20

Definition at line 1837 of file TString.cxx.

◆ IsHex()

Bool_t TString::IsHex ( ) const

Returns true if all characters in string are hexadecimal digits (0-9,a-f,A-F).

Returns false in case string length is 0 or string contains other characters.

Definition at line 1871 of file TString.cxx.

◆ IsInBaseN()

Bool_t TString::IsInBaseN ( Int_t base ) const

Returns true if all characters in string are expressed in the base specified (range=2-36), i.e.

{0,1} for base 2, {0-9,a-f,A-F} for base 16, {0-9,a-z,A-Z} for base 36. Returns false in case string length is 0 or string contains other characters.

Definition at line 1936 of file TString.cxx.

◆ IsLong()

Bool_t TString::IsLong ( ) const

inlineprivate

Definition at line 240 of file TString.h.

◆ IsNull()

Bool_t TString::IsNull ( ) const

inline

Definition at line 415 of file TString.h.

◆ IsOct()

Bool_t TString::IsOct ( ) const

Returns true if all characters in string are octal digits (0-7).

Returns false in case string length is 0 or string contains other characters.

Definition at line 1903 of file TString.cxx.

◆ IsWhitespace()

Bool_t TString::IsWhitespace ( ) const

inline

Definition at line 416 of file TString.h.

◆ Itoa()

TString TString::Itoa	(	Int_t	value,
		Int_t	base
	)

static

Converts an Int_t to a TString with respect to the base specified (2-36).

Thus it is an enhanced version of sprintf (adapted from versions 0.4 of http://www.jb.man.ac.uk/~slowe/cpp/itoa.html). Usage: the following statement produce the same output, namely "1111"

std::cout << TString::Itoa(15,2) ;
std::cout << TString::Itoa(0xF,2) ; /// 0x prefix to handle hex
std::cout << TString::Itoa(017,2) ; /// 0  prefix to handle oct

In case of error returns the "!" string.

Definition at line 2071 of file TString.cxx.

◆ Last()

Ssiz_t TString::Last ( char c ) const

Find last occurrence of a character c.

Definition at line 925 of file TString.cxx.

◆ Length()

Ssiz_t TString::Length ( ) const

inline

Definition at line 418 of file TString.h.

◆ LLtoa()

TString TString::LLtoa	(	Long64_t	value,
		Int_t	base
	)

static

Converts a Long64_t to a TString with respect to the base specified (2-36).

Thus it is an enhanced version of sprintf (adapted from versions 0.4 of http://www.jb.man.ac.uk/~slowe/cpp/itoa.html). In case of error returns the "!" string.

Definition at line 2123 of file TString.cxx.

◆ MaxSize()

static Ssiz_t TString::MaxSize ( )

inlinestaticprivate

Definition at line 263 of file TString.h.

◆ MaxWaste()

Ssiz_t TString::MaxWaste ( Ssiz_t mw = 15 )

static

Set maximum space that may be wasted in a string before doing a resize.

Default is 15.

Definition at line 1591 of file TString.cxx.

◆ MaybeRegexp()

Bool_t TString::MaybeRegexp ( ) const

Returns true if string contains one of the regexp characters "^$.[]*+?".

Definition at line 946 of file TString.cxx.

◆ MaybeWildcard()

Bool_t TString::MaybeWildcard ( ) const

Returns true if string contains one of the wildcard characters "[]*?".

Definition at line 958 of file TString.cxx.

◆ MD5()

TString TString::MD5 ( ) const

Return the MD5 digest for this string, in a string representation.

Definition at line 934 of file TString.cxx.

◆ operator const char *()

TString::operator const char * ( ) const

inline

Definition at line 311 of file TString.h.

◆ operator()() [1/7]

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

Return the substring found by applying the regexp.

Definition at line 279 of file TRegexp.cxx.

◆ operator()() [2/7]

TSubString TString::operator()	(	const TRegexp &	re,
		Ssiz_t	start
	)		const

Return the substring found by applying the regexp starting at start.

Definition at line 269 of file TRegexp.cxx.

◆ operator()() [3/7]

char & TString::operator() ( Ssiz_t i )

inline

Definition at line 723 of file TString.h.

◆ operator()() [4/7]

char TString::operator() ( Ssiz_t i ) const

inline

Definition at line 726 of file TString.h.

◆ operator()() [5/7]

TSubString TString::operator()	(	Ssiz_t	start,
		Ssiz_t	len
	)		const

Return sub-string of string starting at start with length len.

Definition at line 1618 of file TString.cxx.

◆ operator()() [6/7]

TSubString TString::operator() ( TPRegexp & re ) const

Return the substring found by applying the regexp.

Definition at line 563 of file TPRegexp.cxx.

◆ operator()() [7/7]

TSubString TString::operator()	(	TPRegexp &	re,
		Ssiz_t	start
	)		const

Return the substring found by applying the regexp starting at start.

Definition at line 553 of file TPRegexp.cxx.

◆ operator+=() [1/6]

TString & TString::operator+= ( char c )

inline

Definition at line 591 of file TString.h.

◆ operator+=() [2/6]

TString & TString::operator+= ( const char * s )

inline

Definition at line 585 of file TString.h.

◆ operator+=() [3/6]

TString & TString::operator+= ( const TString & s )

inline

Definition at line 588 of file TString.h.

◆ operator+=() [4/6]

template<class T >

std::enable_if< ROOT::TypeTraits::IsFloatNumeral< T >::value, TString >::type & TString::operator+= ( T f )

◆ operator+=() [5/6]

template<class T >

std::enable_if< ROOT::TypeTraits::IsFloatNumeral< T >::value, TString >::type & TString::operator+= ( T i )

inline

Definition at line 596 of file TString.h.

◆ operator+=() [6/6]

template<class T >

std::enable_if< ROOT::TypeTraits::IsUnsignedNumeral< T >::value, TString >::type & TString::operator+= ( T u )

◆ operator=() [1/7]

TString & TString::operator= ( char s )

Assign character c to TString.

Definition at line 296 of file TString.cxx.

◆ operator=() [2/7]

TString & TString::operator= ( const char * s )

Assign string cs to TString.

Definition at line 309 of file TString.cxx.

◆ operator=() [3/7]

TString & TString::operator= ( const std::string & s )

Assign std::string s to TString.

Definition at line 322 of file TString.cxx.

◆ operator=() [4/7]

TString & TString::operator= ( const std::string_view & s )

Assign std::string s to TString.

Definition at line 335 of file TString.cxx.

◆ operator=() [5/7]

TString & TString::operator= ( const TString & s )

Assignment operator.

Definition at line 348 of file TString.cxx.

◆ operator=() [6/7]

TString & TString::operator= ( const TSubString & s )

Assign a TSubString substr to TString.

Definition at line 377 of file TString.cxx.

◆ operator=() [7/7]

TString & TString::operator= ( TString && s )

noexcept

Move-Assignment operator.

Definition at line 366 of file TString.cxx.

◆ operator[]() [1/2]

char & TString::operator[] ( Ssiz_t i )

inline

Definition at line 729 of file TString.h.

◆ operator[]() [2/2]

char TString::operator[] ( Ssiz_t i ) const

inline

Definition at line 732 of file TString.h.

◆ Prepend() [1/5]

TString & TString::Prepend	(	char	c,
		Ssiz_t	rep = `1`
	)

Prepend character c rep times to string.

Definition at line 970 of file TString.cxx.

◆ Prepend() [2/5]

TString & TString::Prepend ( const char * cs )

inline

Definition at line 670 of file TString.h.

◆ Prepend() [3/5]

TString & TString::Prepend	(	const char *	cs,
		Ssiz_t	n
	)

inline

Definition at line 673 of file TString.h.

◆ Prepend() [4/5]

TString & TString::Prepend ( const TString & s )

inline

Definition at line 676 of file TString.h.

◆ Prepend() [5/5]

TString & TString::Prepend	(	const TString &	s,
		Ssiz_t	n
	)

inline

Definition at line 679 of file TString.h.

◆ Puts()

void TString::Puts ( FILE * fp )

Write string to the stream.

Definition at line 223 of file Stringio.cxx.

◆ ReadBuffer()

void TString::ReadBuffer ( char *& buffer )

virtual

Read string from I/O buffer.

Reimplemented in TStringLong.

Definition at line 1310 of file TString.cxx.

◆ ReadFile()

std::istream & TString::ReadFile ( std::istream & str )

Replace string with the contents of strm, stopping at an EOF.

Definition at line 28 of file Stringio.cxx.

◆ ReadLine()

std::istream & TString::ReadLine	(	std::istream &	str,
		Bool_t	skipWhite = `kTRUE`
	)

Read a line from stream upto newline skipping any whitespace.

Definition at line 65 of file Stringio.cxx.

◆ ReadString() [1/2]

std::istream & TString::ReadString ( std::istream & str )

Read a line from stream upto \0, including any newline.

Definition at line 76 of file Stringio.cxx.

◆ ReadString() [2/2]

TString * TString::ReadString	(	TBuffer &	b,
		const TClass *	clReq
	)

static

Read TString object from buffer.

Simplified version of TBuffer::ReadObject (does not keep track of multiple references to same string). We need to have it here because TBuffer::ReadObject can only handle descendant of TObject.

Definition at line 1341 of file TString.cxx.

◆ ReadToDelim()

std::istream & TString::ReadToDelim	(	std::istream &	strm,
		char	delim = `'\n'`
	)

Read up to an EOF, or a delimiting character, whichever comes first.

The delimiter is not stored in the string, but is removed from the input stream. Because we don't know how big a string to expect, we first read as much as we can and then, if the EOF or null hasn't been encountered, do a resize and keep reading.

Definition at line 89 of file Stringio.cxx.

◆ ReadToken()

std::istream & TString::ReadToken ( std::istream & str )

Read a token, delimited by whitespace, from the input stream.

Definition at line 127 of file Stringio.cxx.

◆ Recommend()

static Ssiz_t TString::Recommend ( Ssiz_t s )

inlinestaticprotected

Definition at line 236 of file TString.h.

◆ Remove() [1/3]

TString & TString::Remove	(	EStripType	s,
		char	c
	)

Remove char c at begin and/or end of string (like Strip()) but modifies directly the string.

Definition at line 1113 of file TString.cxx.

◆ Remove() [2/3]

TString & TString::Remove ( Ssiz_t pos )

inline

Definition at line 682 of file TString.h.

◆ Remove() [3/3]

TString & TString::Remove	(	Ssiz_t	pos,
		Ssiz_t	n
	)

inline

Definition at line 685 of file TString.h.

◆ Replace() [1/4]

TString & TString::Replace	(	Ssiz_t	pos,
		Ssiz_t	n,
		const char *	s
	)

inline

Definition at line 691 of file TString.h.

◆ Replace() [2/4]

TString & TString::Replace	(	Ssiz_t	pos,
		Ssiz_t	n,
		const char *	s,
		Ssiz_t	ns
	)

Remove at most n1 characters from self beginning at pos, and replace them with the first n2 characters of cs.

Definition at line 1012 of file TString.cxx.

◆ Replace() [3/4]

TString & TString::Replace	(	Ssiz_t	pos,
		Ssiz_t	n,
		const TString &	s
	)

inline

Definition at line 694 of file TString.h.

◆ Replace() [4/4]

TString & TString::Replace	(	Ssiz_t	pos,
		Ssiz_t	n1,
		const TString &	s,
		Ssiz_t	n2
	)

inline

Definition at line 697 of file TString.h.

◆ ReplaceAll() [1/5]

TString & TString::ReplaceAll	(	const char *	s1,
		const char *	s2
	)

inline

Definition at line 710 of file TString.h.

◆ ReplaceAll() [2/5]

TString & TString::ReplaceAll	(	const char *	s1,
		const TString &	s2
	)

inline

Definition at line 707 of file TString.h.

◆ ReplaceAll() [3/5]

TString & TString::ReplaceAll	(	const char *	s1,
		Ssiz_t	ls1,
		const char *	s2,
		Ssiz_t	ls2
	)

Find & Replace ls1 symbols of s1 with ls2 symbols of s2 if any.

Definition at line 1084 of file TString.cxx.

◆ ReplaceAll() [4/5]

TString & TString::ReplaceAll	(	const TString &	s1,
		const char *	s2
	)

inline

Definition at line 704 of file TString.h.

◆ ReplaceAll() [5/5]

TString & TString::ReplaceAll	(	const TString &	s1,
		const TString &	s2
	)

inline

Definition at line 701 of file TString.h.

◆ ReplaceSpecialCppChars()

TString & TString::ReplaceSpecialCppChars ( )

Find special characters which are typically used in printf() calls and replace them by appropriate escape sequences.

Result can be stored as string argument in ROOT macros. The content of TString will be changed!

Definition at line 1103 of file TString.cxx.

◆ Resize()

void TString::Resize ( Ssiz_t n )

Resize the string. Truncate or add blanks as necessary.

Definition at line 1141 of file TString.cxx.

◆ ResizeIncrement()

Ssiz_t TString::ResizeIncrement ( Ssiz_t ri = 16 )

static

Set default resize increment for all TStrings. Default is 16.

Definition at line 1581 of file TString.cxx.

◆ SetLongCap()

void TString::SetLongCap ( Ssiz_t s )

inlineprivate

Definition at line 251 of file TString.h.

◆ SetLongPointer()

void TString::SetLongPointer ( char * p )

inlineprivate

Definition at line 253 of file TString.h.

◆ SetLongSize()

void TString::SetLongSize ( Ssiz_t s )

inlineprivate

Definition at line 248 of file TString.h.

◆ SetShortSize()

void TString::SetShortSize ( Ssiz_t s )

inlineprivate

Definition at line 245 of file TString.h.

◆ SetSize()

void TString::SetSize ( Ssiz_t s )

inlineprivate

Definition at line 250 of file TString.h.

◆ Sizeof()

Int_t TString::Sizeof ( ) const

virtual

Returns size string will occupy on I/O buffer.

Reimplemented in TStringLong.

Definition at line 1380 of file TString.cxx.

◆ Streamer()

void TString::Streamer ( TBuffer & b )

virtual

Stream a string object.

Reimplemented in TStringToken, TStringLong, TEveException, TGString, and TGHotString.

Definition at line 1391 of file TString.cxx.

◆ StreamerNVirtual()

void TString::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b )

inline

Definition at line 474 of file TString.h.

◆ Strip()

TSubString TString::Strip	(	EStripType	s = `kTrailing`,
		char	c = `' '`
	)		const

Return a substring of self stripped at beginning and/or end.

Definition at line 1152 of file TString.cxx.

◆ SubString()

TSubString TString::SubString	(	const char *	pattern,
		Ssiz_t	startIndex = `0`,
		ECaseCompare	cmp = `kExact`
	)		const

Returns a substring matching "pattern", or the null substring if there is no such match.

It would be nice if this could be yet another overloaded version of operator(), but this would result in a type conversion ambiguity with operator(Ssiz_t, Ssiz_t).

Definition at line 1636 of file TString.cxx.

◆ Swap()

TString & TString::Swap ( TString & other )

inline

Definition at line 713 of file TString.h.

◆ Tokenize() [1/2]

TObjArray * TString::Tokenize ( const TString & delim ) const

This function is used to isolate sequential tokens in a TString.

These tokens are separated in the string by at least one of the characters in delim. The returned array contains the tokens as TObjString's. The returned array is the owner of the objects, and must be deleted by the user.

Definition at line 2243 of file TString.cxx.

◆ Tokenize() [2/2]

Bool_t TString::Tokenize	(	TString &	tok,
		Ssiz_t &	from,
		const char *	delim = `" "`
	)		const

Search for tokens delimited by regular expression 'delim' (default " ") in this string; search starts at 'from' and the token is returned in 'tok'.

Returns in 'from' the next position after the delimiter. Returns kTRUE if a token is found, kFALSE if not or if some inconsistency occurred. This method allows to loop over tokens in this way:

TString myl = "tok1 tok2|tok3";
TString tok;
Ssiz_t from = 0;
while (myl.Tokenize(tok, from, "[ |]")) {
   // Analyse tok
   ...
}

more convenient of the other Tokenize method when saving the tokens is not needed.

Definition at line 303 of file TRegexp.cxx.

◆ ToLower()

void TString::ToLower ( )

Change string to lower-case.

Definition at line 1171 of file TString.cxx.

◆ ToUpper()

void TString::ToUpper ( )

Change string to upper case.

Definition at line 1184 of file TString.cxx.

◆ UItoa()

TString TString::UItoa	(	UInt_t	value,
		Int_t	base
	)

static

Converts a UInt_t (twice the range of an Int_t) to a TString with respect to the base specified (2-36).

Thus it is an enhanced version of sprintf (adapted from versions 0.4 of http://www.jb.man.ac.uk/~slowe/cpp/itoa.html). In case of error returns the "!" string.

Definition at line 2098 of file TString.cxx.

◆ ULLtoa()

TString TString::ULLtoa	(	ULong64_t	value,
		Int_t	base
	)

static

Converts a ULong64_t (twice the range of an Long64_t) to a TString with respect to the base specified (2-36).

Thus it is an enhanced version of sprintf (adapted from versions 0.4 of http://www.jb.man.ac.uk/~slowe/cpp/itoa.html). In case of error returns the "!" string.

Definition at line 2150 of file TString.cxx.

◆ UnLink()

void TString::UnLink ( ) const

inlineprivate

Definition at line 265 of file TString.h.

◆ View()

std::string_view TString::View ( ) const

inline

Definition at line 453 of file TString.h.

◆ WriteString()

void TString::WriteString	(	TBuffer &	b,
		const TString *	a
	)

static

Write TString object to buffer.

Simplified version of TBuffer::WriteObject (does not keep track of multiple references to the same string). We need to have it here because TBuffer::ReadObject can only handle descendant of TObject

Definition at line 1407 of file TString.cxx.

◆ Zero()

void TString::Zero ( )

inlineprivate

Definition at line 266 of file TString.h.

Friends And Related Symbol Documentation

◆ operator+ [1/11]

TString operator+	(	char	c,
		const TString &	s
	)

friend

Add string to char.

Definition at line 1536 of file TString.cxx.

◆ operator+ [2/11]

TString operator+	(	const char *	cs,
		const TString &	s
	)

friend

Use the special concatenation constructor.

Definition at line 1512 of file TString.cxx.

◆ operator+ [3/11]

TString operator+	(	const TString &	s,
		char	c
	)

friend

Add char to string.

Definition at line 1528 of file TString.cxx.

◆ operator+ [4/11]

TString operator+	(	const TString &	s,
		const char *	cs
	)

friend

Use the special concatenation constructor.

Definition at line 1504 of file TString.cxx.

◆ operator+ [5/11]

TString operator+	(	const TString &	s1,
		const TString &	s2
	)

friend

Use the special concatenation constructor.

Definition at line 1520 of file TString.cxx.

◆ operator+ [6/11]

template<class T >

std::enable_if< ROOT::TypeTraits::IsFloatNumeral< T >::value, TString >::type operator+	(	T	f,
		const TString &	s
	)

friend

Definition at line 545 of file TString.h.

◆ operator+ [7/11]

template<class T >

std::enable_if< ROOT::TypeTraits::IsSignedNumeral< T >::value, TString >::type operator+	(	T	i,
		const TString &	s
	)

friend

Definition at line 545 of file TString.h.

◆ operator+ [8/11]

template<class T >

std::enable_if< ROOT::TypeTraits::IsUnsignedNumeral< T >::value, TString >::type operator+	(	T	u,
		const TString &	s
	)

friend

Definition at line 545 of file TString.h.

◆ operator+ [9/11]

template<class T >

std::enable_if< ROOT::TypeTraits::IsFloatNumeral< T >::value, TString >::type operator+	(	TString	s,
		T	f
	)

friend

Definition at line 530 of file TString.h.

◆ operator+ [10/11]

template<class T >

std::enable_if< ROOT::TypeTraits::IsSignedNumeral< T >::value, TString >::type operator+	(	TString	s,
		T	i
	)

friend

Definition at line 530 of file TString.h.

◆ operator+ [11/11]

template<class T >

std::enable_if< ROOT::TypeTraits::IsUnsignedNumeral< T >::value, TString >::type operator+	(	TString	s,
		T	u
	)

friend

Definition at line 530 of file TString.h.

◆ operator<<

TBuffer & operator<<	(	TBuffer &	b,
		const TString *	obj
	)

friend

Write TString or derived to TBuffer.

Definition at line 1449 of file TString.cxx.

◆ operator== [1/2]

Bool_t operator==	(	const TString &	s1,
		const char *	s2
	)

friend

Compare TString with a char *.

Definition at line 1461 of file TString.cxx.

◆ operator== [2/2]

Bool_t operator==	(	const TString &	s1,
		const TString &	s2
	)

friend

Definition at line 766 of file TString.h.

◆ TBufferFile

friend class TBufferFile

friend

Definition at line 143 of file TString.h.

◆ TStringLong

friend class TStringLong

friend

Definition at line 141 of file TString.h.

◆ TSubString

friend class TSubString

friend

Definition at line 142 of file TString.h.

Member Data Documentation

◆ fRep

Rep_t TString::fRep

protected

Definition at line 225 of file TString.h.

◆ kNPOS

const Ssiz_t TString::kNPOS = ::kNPOS

static

Definition at line 280 of file TString.h.

core/base/inc/TString.h

core/base/src/Stringio.cxx

core/base/src/TPRegexp.cxx

core/base/src/TRegexp.cxx

core/base/src/TString.cxx

Classes

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Types

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Private Types

Private Member Functions

Static Private Member Functions

Friends

Member Enumeration Documentation

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ ECaseCompare

◆ EStripType

Constructor & Destructor Documentation

◆ TString() [1/12]

◆ TString() [2/12]

◆ TString() [3/12]

◆ TString() [4/12]

◆ TString() [5/12]

◆ TString() [6/12]

◆ TString() [7/12]

◆ TString() [8/12]

◆ TString() [9/12]

◆ TString() [10/12]

◆ TString() [11/12]

◆ TString() [12/12]

◆ ~TString()

Member Function Documentation

◆ AdjustCapacity()

◆ Align()

◆ Append() [1/5]

◆ Append() [2/5]

◆ Append() [3/5]

◆ Append() [4/5]

◆ Append() [5/5]

◆ AssertElement()

◆ Atof()

◆ Atoi()

◆ Atoll()

◆ BaseConvert()

◆ BeginsWith() [1/2]

◆ BeginsWith() [2/2]

◆ Capacity() [1/2]

◆ Capacity() [2/2]

◆ Chop()

◆ Class()

◆ Class_Name()

◆ Class_Version()

◆ Clear()

◆ Clobber()

◆ Clone()

◆ CompareTo() [1/2]

◆ CompareTo() [2/2]

◆ Contains() [1/4]

◆ Contains() [2/4]

◆ Contains() [3/4]

◆ Contains() [4/4]

◆ Copy()

◆ CountChar()

◆ Data()

◆ DeclFileName()

◆ EndsWith()

◆ EqualTo() [1/2]

◆ EqualTo() [2/2]

◆ FillBuffer()

◆ First() [1/2]

◆ First() [2/2]

◆ Form()

◆ Format()

◆ FormImp()

◆ GetInitialCapacity()

◆ GetLongCap()

◆ GetLongPointer() [1/2]