reranker::StaticSymbolTable Class Reference

A converter from symbols (strings) to int indices. More...

#include <symbol-table.H>

Inheritance diagram for reranker::StaticSymbolTable:

Public Member Functions
virtual const_iterator	begin ()
virtual const_iterator	end ()
virtual size_t	size () const
	Returns the number of symbols in this table. More...
virtual int	GetIndex (const string &symbol)
	Converts the specified symbol to a unique integer. More...
virtual const string &	GetSymbol (int index) const
	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)
virtual void	Clear ()
	Clears all symbols from this symbol table. More...
virtual Symbols *	Clone () const
	Creates a newly-constructed clone of this Symbols instance that has the same runtime type. More...
virtual ostream &	Output (ostream &os)
	Outputs the symbol table to the specified output stream in a simple format, one symbol-to-index mapping per line: More...
Public Member Functions inherited from reranker::Symbols
virtual	~Symbols ()

Additional Inherited Members
Public Types inherited from reranker::Symbols
typedef unordered_map< string, int >::const_iterator	const_iterator
Static Protected Attributes inherited from reranker::Symbols
static string	null_symbol

Detailed Description

A converter from symbols (strings) to int indices.

This symbol table implementation always adds symbols to its internal symbol table and never removes them.

Implementation note:

Instances of this class provide the interface to convert symbols to int’s, but underlyingly there is a static map, so multiple instances of this class are all “viewing” the same static data structure, hence the name of this Symbols implementation.

Definition at line 120 of file symbol-table.H.

Member Function Documentation

virtual const_iterator reranker::StaticSymbolTable::begin ( )

inlinevirtual

Implements reranker::Symbols.

Definition at line 122 of file symbol-table.H.

virtual void reranker::StaticSymbolTable::Clear ( )

inlinevirtual

Clears all symbols from this symbol table.

Implements reranker::Symbols.

Definition at line 154 of file symbol-table.H.

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

inlinevirtual

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

Implements reranker::Symbols.

Definition at line 160 of file symbol-table.H.

virtual const_iterator reranker::StaticSymbolTable::end ( )

inlinevirtual

Implements reranker::Symbols.

Definition at line 123 of file symbol-table.H.

int reranker::StaticSymbolTable::GetIndex ( const string &  symbol )

virtual

Converts the specified symbol to a unique integer.

TODO(dbikel,kbhall): Protect access to static symbol table via a mutex of some kind.

Parameters

symbol

the symbol to convert

Returns

a unique integer for the specified symbol

Implements reranker::Symbols.

Definition at line 54 of file symbol-table.C.

const string & reranker::StaticSymbolTable::GetSymbol ( int  index ) const

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.

Implements reranker::Symbols.

Definition at line 67 of file symbol-table.C.

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

inlinevirtual

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

Implements reranker::Symbols.

Definition at line 165 of file symbol-table.H.

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

inlinevirtual

Implements reranker::Symbols.

Definition at line 141 of file symbol-table.H.

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

inlinevirtual

Returns the number of symbols in this table.

Implements reranker::Symbols.

Definition at line 126 of file symbol-table.H.

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

• symbol-table.H
• symbol-table.C