Interface ReadonlyNFA

A readonly NFA.

Hierarchy

Implemented by

Properties

finals: ReadonlySet<NFA.ReadonlyNode>

The set of final states of the NFA.

This set may be empty or contain nodes not reachable from the initial state.

initial: NFA.ReadonlyNode

The initial state of the NFA.

isEmpty: boolean

Returns whether this FA accepts the empty language meaning that it doesn't accept any words.

isFinite: boolean

Returns whether the formal language accepted by this FA contains finitely many words.

Note: Finite does not mean that all words can be iterated in practice. E.g. the set of all Unicode words with 10 or less characters contains 2.6e54 many words and can be accepted by a DFA with only 11 states.

isNormalized: boolean

Whether this NFA is in its normal form.

See

NFA

maxCharacter: Char

The maximum character that is part of the alphabet of the words that this FA can accept.

transitionIterator: (() => TransitionIterator<NFA.ReadonlyNode>)

Methods

  • Returns the number of nodes reachable from the initial state including the initial state.

    This returns the number of nodes returned by nodes.

    Returns number

  • Yields all nodes reachable from the initial state including the initial state.

    This may include trap states, but it will not include unreachable final states.

    The order in which nodes will be returned is implementation defined and may change after any operation that modifies the NFA.

    Modifying the NFA while iterating will result in implementation-defined behavior. The implementation may stop the iteration or yield an nodes.

    This operation runs in O(E + V) where E is the number of nodes reachable from the initial state and V is the number of transitions.

    Returns Iterable<NFA.ReadonlyNode>

  • Returns the string representation of this FA in the DOT format.

    The output of this function can passed to any graph visualization program. This can be a local installation or an online editor.

    By default, toUnicodeString is used to represent CharSets. It's possible to provide a custom stringify function using the charSetToString parameter.

    Parameters

    • Optional charSetToString: ((charSet: CharSet) => string)
        • (charSet: CharSet): string
        • Parameters

          Returns string

    Returns string

  • Returns the string representation of this FA in the Mermaid format.

    By default, toUnicodeString is used to represent CharSets. It's possible to provide a custom stringify function using the charSetToString parameter.

    Parameters

    • Optional charSetToString: ((charSet: CharSet) => string)
        • (charSet: CharSet): string
        • Parameters

          Returns string

    Returns string

  • Returns a string representation of this FA.

    Returns string

  • Returns an iterable that will yield all word sets accepted by this FA. Word sets are yielded by ascending length.

    If this FA accepts infinitely many words, the iterable will never end. If this FA is finite, the iterable will end after at most 2^O(n) word sets (n = number of states).

    If you analyse the words of an FA, consider using this method instead of words. If this method yields k word sets, then words will yield up to O(k * m ^ l) words (m = number of possible characters, l = the maximum length of any of the k word sets).

    Returns Iterable<WordSet>

  • Returns an iterable that will yield all words accepted by this FA. Words are yielded by ascending length.

    If this FA accepts infinitely many words, the iterable will never end.

    Returns Iterable<Word>