psy::C::Lexeme Class Reference

The Lexeme class. More...

#include <Lexeme.h>

Inheritance diagram for psy::C::Lexeme:

Classes
struct	BitFields

Public Types
enum	LexemeKind : std::uint16_t {   Identifier, IntegerConstant, FloatingConstant, CharacterConstant,   ImaginaryIntegerConstant, ImaginaryFloatingConstant, StringLiteral }
	The LexemeKind enumeraiton.
Public Types inherited from psy::TextElement
typedef const char *	iterator
typedef iterator	const_iterator

Public Member Functions
LexemeKind	kind () const
std::string	valueText () const
template<class ValueT >
ValueT	value () const
template<>
int	value () const
template<>
long	value () const
template<>
long long	value () const
template<>
unsigned long	value () const
template<>
unsigned long long	value () const
template<>
float	value () const
template<>
double	value () const
template<>
long double	value () const
template<>
unsigned char	value () const
template<>
wchar_t	value () const
template<>
char16_t	value () const
template<>
char32_t	value () const
virtual Identifier *	asIdentifier ()
virtual const Identifier *	asIdentifier () const
virtual IntegerConstant *	asIntegerConstant ()
virtual const IntegerConstant *	asIntegerConstant () const
virtual FloatingConstant *	asFloatingConstant ()
virtual const FloatingConstant *	asFloatingConstant () const
virtual CharacterConstant *	asCharacterConstant ()
virtual const CharacterConstant *	asCharacterConstant () const
virtual ImaginaryIntegerConstant *	asImaginaryIntegerConstant ()
virtual const ImaginaryIntegerConstant *	asImaginaryIntegerConstant () const
virtual ImaginaryFloatingConstant *	asImaginaryFloatingConstant ()
virtual const ImaginaryFloatingConstant *	asImaginaryFloatingConstant () const
virtual StringLiteral *	asStringLiteral ()
virtual const StringLiteral *	asStringLiteral () const
Public Member Functions inherited from psy::TextElement
	TextElement (const char *c_str, unsigned int size)
	TextElement (const TextElement &other)=delete
void	operator= (const TextElement &other)=delete
iterator	begin () const
iterator	end () const
char	at (unsigned int idx) const
const char *	c_str () const
unsigned int	size () const
unsigned int	length () const

Protected Member Functions
	Lexeme (const Lexeme &)=delete
Lexeme &	operator= (const Lexeme &)=delete
	Lexeme (const char *chars, unsigned int size, LexemeKind kind)

Protected Attributes
union {
std::uint16_t   BF_all_
BitFields   BF_
};

Detailed Description

The Lexeme class.

Member Function Documentation

asCharacterConstant() [1/2]

virtual CharacterConstant* psy::C::Lexeme::asCharacterConstant ( )

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::CharacterConstant.

asCharacterConstant() [2/2]

virtual const CharacterConstant* psy::C::Lexeme::asCharacterConstant ( ) const

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::CharacterConstant.

asFloatingConstant() [1/2]

virtual FloatingConstant* psy::C::Lexeme::asFloatingConstant ( )

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::FloatingConstant.

asFloatingConstant() [2/2]

virtual const FloatingConstant* psy::C::Lexeme::asFloatingConstant ( ) const

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::FloatingConstant.

asIdentifier() [1/2]

virtual Identifier* psy::C::Lexeme::asIdentifier ( )

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::Identifier.

asIdentifier() [2/2]

virtual const Identifier* psy::C::Lexeme::asIdentifier ( ) const

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::Identifier.

asImaginaryFloatingConstant() [1/2]

virtual ImaginaryFloatingConstant* psy::C::Lexeme::asImaginaryFloatingConstant ( )

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::ImaginaryFloatingConstant.

asImaginaryFloatingConstant() [2/2]

virtual const ImaginaryFloatingConstant* psy::C::Lexeme::asImaginaryFloatingConstant ( ) const

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::ImaginaryFloatingConstant.

asImaginaryIntegerConstant() [1/2]

virtual ImaginaryIntegerConstant* psy::C::Lexeme::asImaginaryIntegerConstant ( )

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::ImaginaryIntegerConstant.

asImaginaryIntegerConstant() [2/2]

virtual const ImaginaryIntegerConstant* psy::C::Lexeme::asImaginaryIntegerConstant ( ) const

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::ImaginaryIntegerConstant.

asIntegerConstant() [1/2]

virtual IntegerConstant* psy::C::Lexeme::asIntegerConstant ( )

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::IntegerConstant.

asIntegerConstant() [2/2]

virtual const IntegerConstant* psy::C::Lexeme::asIntegerConstant ( ) const

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::IntegerConstant.

asStringLiteral() [1/2]

virtual StringLiteral* psy::C::Lexeme::asStringLiteral ( )

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::StringLiteral.

asStringLiteral() [2/2]

virtual const StringLiteral* psy::C::Lexeme::asStringLiteral ( ) const

inlinevirtual

Cast this Lexeme.

Reimplemented in psy::C::StringLiteral.

kind()

Lexeme::LexemeKind Lexeme::kind

(

)

const

The LexemeKind of this Lexeme.

value()

template<class ValueT >

ValueT psy::C::Lexeme::value

(

)

const

The value of this Lexeme. Template parameter ValueT must be substituted, as an argument, by the C type corresponding to the lexeme in question. Therefore, prior to calling Lexeme::value, one must check the speficic kind of a lexeme, and any variant it might have. Consider the snippet below, which stores in i the C value of 42UL of a given Lexeme, named lexeme.

if (lexeme->kind() == LexemeKind::IntegerConstant) {
    auto intLexeme = lexeme->asIntegerConstant();
    if (intLexeme->signedness() == IntegerConstant::Signedness::Unsigned
            && intLexeme->variant() == IntegerConstant::Variant::Long) {
        auto i = intLexeme->value<unsigned long>();
        // ...
    }
}

Remarks

6.2.5

6.4

valueText()

std::string Lexeme::valueText

(

)

const

The value of this Lexeme represented as text, by an std::string.

Note

The return of this method is the same as that of SyntaxToken::valueText, for the SyntaxToken from which this Lexeme was obtained.

See also

SyntaxToken::valueText

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

• C/syntax/Lexeme.h
• C/syntax/Lexeme.cpp