reranker::Symbols Class Reference

An interface specifying a converter from symbols (strings) to int indices. More...

#include <symbol-table.H>

Inheritance diagram for reranker::Symbols:

Public Types
typedef unordered_map< string, int >::const_iterator	const_iterator

Public Member Functions
virtual	~Symbols ()
virtual const_iterator	begin ()=0
virtual const_iterator	end ()=0
virtual size_t	size () const =0
	Returns the number of symbols in this table. More...
virtual int	GetIndex (const string &symbol)=0
	Converts the specified symbol to a unique integer. More...
virtual const string &	GetSymbol (int index) const =0
	Returns the unique symbol for the specified index, or the empty string if the specified index does not map to any symbol in this symbol table. More...
virtual void	SetIndex (const string &symbol, int index)=0
virtual void	Clear ()=0
	Clears all symbols from this symbol table. More...
virtual Symbols *	Clone () const =0
	Creates a newly-constructed clone of this Symbols instance that has the same runtime type. More...
virtual ostream &	Output (ostream &os)=0
	Outputs the symbol table to the specified output stream in a simple format, one symbol-to-index mapping per line: More...

Static Protected Attributes
static string	null_symbol

Detailed Description

An interface specifying a converter from symbols (strings) to int indices.

Definition at line 57 of file symbol-table.H.

Member Typedef Documentation

typedef unordered_map<string, int>::const_iterator reranker::Symbols::const_iterator

Definition at line 60 of file symbol-table.H.

Constructor & Destructor Documentation

virtual reranker::Symbols::~Symbols ( )

inlinevirtual

Definition at line 59 of file symbol-table.H.

Member Function Documentation

virtual const_iterator reranker::Symbols::begin ( )

pure virtual

Implemented in reranker::LocalSymbolTable, and reranker::StaticSymbolTable.

virtual void reranker::Symbols::Clear ( )

pure virtual

Clears all symbols from this symbol table.

Implemented in reranker::LocalSymbolTable, and reranker::StaticSymbolTable.

virtual Symbols* reranker::Symbols::Clone ( ) const

pure virtual

Creates a newly-constructed clone of this Symbols instance that has the same runtime type.

The caller will be responsible for destroying the returned instance.

Returns

a clone of this Symbols instance that has the same runtime type

Implemented in reranker::LocalSymbolTable, and reranker::StaticSymbolTable.

virtual const_iterator reranker::Symbols::end ( )

pure virtual

Implemented in reranker::LocalSymbolTable, and reranker::StaticSymbolTable.

virtual int reranker::Symbols::GetIndex ( const string &  symbol )

pure virtual

Converts the specified symbol to a unique integer.

The behavior of this class is undefined if the specified symbol is the empty string.

Parameters

symbol

the symbol to convert

Returns

a unique integer for the specified symbol

Implemented in reranker::LocalSymbolTable, and reranker::StaticSymbolTable.

virtual const string& reranker::Symbols::GetSymbol ( int  index ) const

pure virtual

Returns the unique symbol for the specified index, or the empty string if the specified index does not map to any symbol in this symbol table.

Implemented in reranker::LocalSymbolTable, and reranker::StaticSymbolTable.

virtual ostream& reranker::Symbols::Output ( ostream &  os )

pure virtual

Outputs the symbol table to the specified output stream in a simple format, one symbol-to-index mapping per line:

<symbol> <tab> <index> 

where

<symbol> ::= an indexed string symbol
<tab>    ::= a tab character, '\t'
<index>  ::= a unique integer for <symbol>

Parameters

os	the output stream to which to output the symbol table

Returns

the specified output stream

Implemented in reranker::LocalSymbolTable, and reranker::StaticSymbolTable.

virtual void reranker::Symbols::SetIndex ( const string &  symbol, int  index  )

pure virtual

Implemented in reranker::LocalSymbolTable, and reranker::StaticSymbolTable.

virtual size_t reranker::Symbols::size ( ) const

pure virtual

Returns the number of symbols in this table.

Implemented in reranker::LocalSymbolTable, and reranker::StaticSymbolTable.

Member Data Documentation

string reranker::Symbols::null_symbol

staticprotected

Definition at line 106 of file symbol-table.H.

---

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

• symbol-table.H
• symbol-table.C