page

Class: NT

page.EBNF. NT

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

<private> new NT(_name, _index)

Creates a new non-terminal representation for EBNF.

Parameters:
Name Type Description
_name string

non-terminal's name.
_index number

non-terminal's index in page.EBNF.nts.
Properties:
Name Type Description
name string

non-terminal's name.
index number

non-terminal's index in page.EBNF.nts; transient, maintained by page.BNF#nt.
ord number

non-terminal's global index; transient, set in page.EBNF#init.
nt page.BNF.NT

corresponding non-terminal for BNF.
empty boolean

true if no input can be accepted.
first Map

terminals at front, maps ord to page.BNF.T.
follow Map

terminals following, maps ord to page.BNF.T.
rule page.EBNF.Rule

defining this; transient, maintained when a rule is constructed.
Source:

Extends

Methods

dump()

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

Inherited From:
Source:
Returns:
Type
string

<private> init()

Called by page.EBNF#init to complete EBNF grammar initialization. Imports page.BNF.NT.empty, page.BNF.NT.first, and page.BNF.NT.follow from page.EBNF.NT.nt.

Source:

<private> toBNF(_grammar)

Called once by page.EBNF#init to recursively translate into BNF.

Parameters:
Name Type Description
_grammar page.EBNF

object to which the construct belongs.
Source:
Returns:

non-terminal with the same name.

Type
page.BNF.NT

toString()

Displays name.

Inherited From:
Source:
Returns:
Type
string