#include <span_factory.h>

Public Member Functions
	SpanFactory (const Knowledge::PostagConstrain constrain, SpanAllocator allocator)

void	create_initial_spans_from_input (const dependency_t input_ref, std::vector< Span > &spans)

void	create_spans_from_chart (const Span span, const SpanKMaxHeap charts, std::vector< Span * > &spans)

void	create_gold_spans_from_reference (const dependency_t input, const dependency_t reference, SpanSet &spans)

Protected Member Functions
virtual bool	legal_to_left_combine (const Span head, const Span modifier) const

virtual bool	legal_to_right_combine (const Span head, const Span modifier) const

Constructor & Destructor Documentation

ZGen::BestFirst::SpanFactory::SpanFactory	(	const Knowledge::PostagConstrain *	constrain,
		SpanAllocator *	allocator
	)

Member Function Documentation

void ZGen::BestFirst::SpanFactory::create_gold_spans_from_reference	(	const dependency_t *	input,
		const dependency_t *	reference,
		SpanSet &	spans
	)

Enumerate all the gold spans from a reference dependency tree.

Parameters

[in]	input	The input dependency.
[in]	reference	The reference dependency.
[out]	spans	The output spans.

void ZGen::BestFirst::SpanFactory::create_initial_spans_from_input	(	const dependency_t *	input_ref,
		std::vector< Span * > &	spans
	)

Make initial spans from the input data. These spans is used as initial spans to the searching process.

Parameters

[in]	input_ref	The input data's reference.
[out]	spans	The output spans.

void ZGen::BestFirst::SpanFactory::create_spans_from_chart	(	const Span *	span,
		const SpanKMaxHeap *	charts,
		std::vector< Span * > &	spans
	)

Make spans (namely, the transition in the search process) from the charts.

Parameters

[in]	span	The from spans.
[in]	charts	The current chart.
[out]	spans	The output spans.

bool ZGen::BestFirst::SpanFactory::legal_to_left_combine	(	const Span *	head,
		const Span *	modifier
	)		const

protectedvirtual

legal_to_left_combine and legal_to_right_combine are the functions which needed to be override for different input constrains implementation. Check if it is legal to construct a span by combining the head and the modifier as a left modifier.

Parameters

[in]	head	The pointer to the head span.
[in]	modifier	The pointer to the modifier span.

Returns: bool Return true when it is legal, otherwise return false.

bool ZGen::BestFirst::SpanFactory::legal_to_right_combine	(	const Span *	head,
		const Span *	modifier
	)		const

protectedvirtual

Check if it is legal to construct a span by combining the head and the modifier as a right modifier.

Parameters

[in]	head	The pointer to the head span.
[in]	modifier	The pointer to the modifier span.

Returns: bool Return true when it is legal, otherwise return false.

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

src/bestfirst/search/span_factory.h
src/bestfirst/search/span_factory.cc

Public Member Functions

Protected Member Functions

Constructor & Destructor Documentation

Member Function Documentation