Parser::State Class Reference
[Dependency Parser]

Parser base state. More...

#include <State.h>

Inheritance diagram for Parser::State:

List of all members.

Public Member Functions
	State (Sentence const &sentence, GlobalInfo *globalInfo)
	Constructor.
	State (State const &state)
bool	hasNext ()
State *	transition (Action action)
	Perform action represented by Action action.
State *	Shift ()
	Perform a Shift action.
State *	Right (Action action)
	Perform a Right action.
State *	Left (Action action)
	Perform a Left action.
State *	right (Action action)
	Perform a far right action.
State *	left (char const *action)
	Perform a far left action.
State *	DepLink (Action action)
	Perform a link action.
State *	Extract ()
	Perform an Extract action.
State *	Insert ()
	Perform an Insert action.
State *	Pop ()
	Perform a Pop action.
Sentence *	getSentence ()
void	showStatus ()
Public Attributes
Sentence	sentence
	the sentence parsed so far
TreeToken *	rootNode
	Dummy root node.
std::string	splitFeature
	used to split SVMs
State const *	previous
	The previous State in the derivation.
Action	action
	The action that lead to this state.
std::vector< TreeToken * >	input
	Stack from which input tokens are extracted.
std::vector< TreeToken * >	stack
	Stack where analyzed tokens are accumulated.
std::vector< TreeToken * >	extracted
	Stack where extracted tokens are accumulated.
Static Public Attributes
static Tanl::Text::RegExp::Pattern	ispunct
	Pattern for detecting punctuation:.
Protected Member Functions
virtual TreeToken *	copy (TreeToken *x)
void	predicates (Features &preds, Action action=0)
	Collect features representing context.
Protected Attributes
SentenceInfo *	sentenceInfo
int	verbCount
	Number of verbs so far.
Static Protected Attributes
static Tanl::Text::RegExp::Pattern	nonWordAscii
	Weird version of ispunct.

---

Detailed Description

Parser base state.

---

Constructor & Destructor Documentation

Parser::State::State	(	Sentence const &	sentence,
		GlobalInfo *	globalInfo
	)

Constructor.

Parameters:

	sentence	the sentence to be parsed.
	globalInfo,global	parse information.

References input, Tanl::Sentence::reverse(), rootNode, and stack.

---

Member Function Documentation

State * Parser::State::DepLink

(

Action

action

)

[inline]

Perform a link action.

References action, input, Tanl::TreeToken::left, previous, Tanl::TreeToken::right, and stack.

Referenced by transition().

State * Parser::State::Extract

(

)

Perform an Extract action.

References extracted, input, and stack.

Referenced by transition().

bool Parser::State::hasNext

(

)

Returns:

whether this is a final state.

Reimplemented in Parser::TrainState, and Parser::ParseState.

References input.

State * Parser::State::Insert

(

)

Perform an Insert action.

References extracted, and input.

Referenced by transition().

State * Parser::State::left

(

char const *

action

)

[inline]

Perform a far left action.

References input, Tanl::TreeToken::right, and stack.

Referenced by transition().

State * Parser::State::Left

(

Action

action

)

[inline]

Perform a Left action.

References input, Tanl::TreeToken::right, and stack.

Referenced by transition().

State * Parser::State::Pop

(

)

Perform a Pop action.

References stack.

Referenced by transition().

State * Parser::State::right

(

Action

action

)

[inline]

Perform a far right action.

References input, Tanl::TreeToken::left, and stack.

Referenced by transition().

State * Parser::State::Right

(

Action

action

)

[inline]

Perform a Right action.

References input, Tanl::TreeToken::left, and stack.

Referenced by transition().

State * Parser::State::Shift

(

)

[inline]

Perform a Shift action.

Parsing actions.

References input, and stack.

Referenced by transition().

State * Parser::State::transition

(

Action

action

)

Perform action represented by Action action.

Perform a parsing action.

Returns:

next State, or NULL if action failed.

Actions can be: Left, Right, Shift, Left2, Right2, Left3, Right3, Extract, Insert. Left and Right operate on top of stack and next sentence token. Left2 and Right2 operate on second top of stack and next sentence token. Left3 and Right3 operate on third top of stack and next sentence token. Extract and Insert, move/restore token to/from extracted.

The reduce actions (Left/Right) are combined with the deprel to be assigned to the link created. If CompositeAction is false, instead, there are separate additional actions DepLeft and DepRight, used to assign the label to a link created with the preceding reduce action. DepLeft and DepRight are paired with the dependency label to be assigned.

Returns:

the new State after the transition.

Reimplemented in Parser::ParseState.

References DepLink(), Extract(), input, Insert(), left(), Left(), Pop(), right(), Right(), Shift(), and stack.

Referenced by Parser::EventStream::next(), and Parser::MlpParser::parse().

---

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

• parse/desr/src/State.h
• parse/desr/src/State.cpp