Class: NT

page .BNF. NT

Represents a (unique!) non-terminal for BNF.

<private> new NT(_name, _index)

Creates a new non-terminal representation for BNF.

Parameters:

Name	Type	Description
`_name`	string	non-terminal's name.
`_index`	number	non-terminal's index in page.BNF`.nts`.

Properties:

Name	Type	Description
`name`	string	non-terminal's name.
`index`	number	non-terminal's index in page.BNF`.nts`; transient, maintained by page.BNF#nt.
`ord`	number	non-terminal's global index; transient, set in page.BNF#init.
`rules`	Array.<page.BNF.Rule>	defining `this`; transient, maintained when a rule is constructed.
`empty`	boolean	true if no input can be accepted.
`reached`	boolean	true if this can be reached from rule zero, transient.
`finite`	boolean	true if there is a non-recursive expansion, transient.
`first`	Map	terminals at front, maps ord to page.BNF.T.
`follow`	Map	terminals following, maps ord to page.BNF.T.

Source:

BNF/NT.js, line 30

Methods

dump()

Displays index or ord and name and contents of all sets.

Source:

BNF/NT.js, line 54

Returns:

Type: string

toString()

Displays name.

Source:

BNF/NT.js, line 47

Returns:

Type: string