Filter that removes "non-letter" characters from tokens. More...

Inheritance diagram for meta::analyzers::filters::alpha_filter:

Public Member Functions
	alpha_filter (std::unique_ptr< token_stream > source)
	Constructs an alpha filter reading tokens from the given source. More...

	alpha_filter (const alpha_filter &other)
	Copy constructor. More...

void	set_content (const std::string &content) override
	Sets the content for the beginning of the filter chain. More...

std::string	next () override
	Obtains the next token in the sequence.

	operator bool () const override
	Determines whether there are more tokens available in the stream.

Public Member Functions inherited from meta::util::multilevel_clonable< Root, Base, Derived >
virtual std::unique_ptr< Root >	clone () const
	Clones the given object. More...

Private Member Functions
void	next_token ()
	Finds the next valid token for this filter.

Private Attributes
std::unique_ptr< token_stream >	source_
	The source to read tokens from.

util::optional< std::string >	token_
	The buffered token.

Detailed Description

Filter that removes "non-letter" characters from tokens.

"Letterness" is determined by the Unicode properties of each codepoint in the token.

Constructor & Destructor Documentation

meta::analyzers::filters::alpha_filter::alpha_filter ( std::unique_ptr< token_stream > source )

Constructs an alpha filter reading tokens from the given source.

Parameters

source The source to construct the filter from

meta::analyzers::filters::alpha_filter::alpha_filter ( const alpha_filter & other )

Copy constructor.

Parameters

other The alpha_filter to copy into this one

void meta::analyzers::filters::alpha_filter::set_content ( const std::string & content )

override

Sets the content for the beginning of the filter chain.

Parameters

content The string content to set

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