class TSubString


TString

Basic string class.

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

Function Members (Methods)

public:

	TSubString(const TSubString& s)
	~TSubString()
const char*	Data() const
Bool_t	IsNull() const
Ssiz_t	Length() const
int	operator!() const
char&	operator()(Ssiz_t i)
char	operator()(Ssiz_t i) const
TSubString&	operator=(const char* s)
TSubString&	operator=(const TString& s)
TSubString&	operator=(const TSubString& s)
char&	operator[](Ssiz_t i)
char	operator[](Ssiz_t i) const
Ssiz_t	Start() const
TString&	String()
void	ToLower()
void	ToUpper()

protected:

void	AssertElement(Ssiz_t i) const
void	SubStringError(Ssiz_t, Ssiz_t, Ssiz_t) const

private:

TSubString(const TString& s, Ssiz_t start, Ssiz_t len)

Data Members

private:

Ssiz_t	fBegin	Index of starting character
Ssiz_t	fExtent	Length of TSubString
TString&	fStr	Referenced string

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

const char * Data() const

 Return a pointer to the beginning of the substring. Note that the
 terminating null is in the same place as for the original
 TString, so this method is not appropriate for converting the
 TSubString to a string. To do that, construct a TString from the
 TSubString. For example:

   root [0] TString s("hello world")
   root [1] TSubString sub=s(0, 5)
   root [2] sub.Data()
   (const char* 0x857c8b8)"hello world"
   root [3] TString substr(sub)
   root [4] substr
   (class TString)"hello"

char operator[](Ssiz_t i) const

 Access to elements of sub-string with bounds checking

{ AssertElement(i); return fStr.fData[fBegin+i]; }

char operator()(Ssiz_t i) const

{ return fStr.fData[fBegin+i]; }

TSubString & operator=(const TSubString& s)

{ fStr = s.fStr; fBegin = s.fBegin; fExtent = s.fExtent; return *this; }

Ssiz_t Length() const

{ return fNchars; }

char & operator[](Ssiz_t i)

{ return ((char*)(this+1))[i]; }

TSubString(const TString& s, Ssiz_t start, Ssiz_t len)

 NB: the only constructor is private

void SubStringError(Ssiz_t , Ssiz_t , Ssiz_t ) const

void AssertElement(Ssiz_t i) const

TSubString(const TSubString& s)

{ }

TSubString & operator=(const char* s)

TSubString & operator=(const TString& s)

char & operator()(Ssiz_t i)

Ssiz_t Start() const

{ return fBegin; }

void ToLower()

void ToUpper()

Bool_t IsNull() const

 For detecting null substrings

{ return fBegin == kNPOS; }

int operator!() const

{ return fBegin == kNPOS; }