A visitor that annotates the internal nodes of parse trees with their head constituents/lexicons. More...

Inheritance diagram for meta::parser::head_finder:

Public Types
using	rule_table = std::unordered_map< class_label, std::unique_ptr< head_rule >>
	The storage type used for holding the head finding rules.

Public Types inherited from meta::parser::visitor< void >
using	result_type = void
	The result of running the visitor over the tree.

Public Member Functions
	head_finder ()
	Constructs a default head finder, using the head finding rules for English from Michael Collins' thesis. More...

	head_finder (rule_table &&table)
	Constructs a head finder using the supplied head finding rules.

void	operator() (leaf_node &) override

void	operator() (internal_node &) override

Private Attributes
rule_table	rules_
	The head finding rules used for this head_finder.

Detailed Description

A visitor that annotates the internal nodes of parse trees with their head constituents/lexicons.

This follows the head finding rules given in Michael Collins' thesis and has been designed only for English using Penn Treebank annotations.

Constructor & Destructor Documentation

meta::parser::head_finder::head_finder ( )

Constructs a default head finder, using the head finding rules for English from Michael Collins' thesis.

See also: : http://www.cs.columbia.edu/~mcollins/papers/heads; Collins' thesis, page 240

void meta::parser::head_finder::operator() ( leaf_node & )

overridevirtual

void meta::parser::head_finder::operator() ( internal_node & )

overridevirtual

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