Class ExpressionWordState

Implements a word state object.

Hierarchy

GenericWordState
- ExpressionWordState

Implements

IWordState

Index

Constructors

constructor

Properties

keywords

Methods

Constructors

constructor

new ExpressionWordState(): ExpressionWordState

Overrides GenericWordState.constructor
- Defined in calculator/tokenizers/ExpressionWordState.ts:17
Constructs an instance of this class.

Returns ExpressionWordState

Properties

keywords

keywords: string[] = ["AND", "OR", "NOT", "XOR", "LIKE", "IS", "IN", "NULL", "TRUE", "FALSE"]

Supported expression keywords.

Methods

clearWordChars

clearWordChars(): void

Implementation of IWordState.clearWordChars

Inherited from GenericWordState.clearWordChars
- Defined in tokenizers/generic/GenericWordState.ts:83
Clears definitions of word chars.

Returns void

nextToken

nextToken(scanner: IScanner, tokenizer: ITokenizer): Token

Implementation of IWordState.nextToken

Overrides GenericWordState.nextToken
- Defined in calculator/tokenizers/ExpressionWordState.ts:40
Gets the next token from the stream started from the character linked to this state.

Parameters
- scanner: IScanner
  
  A textual string to be tokenized.
- tokenizer: ITokenizer
  
  A tokenizer class that controls the process.
Returns Token

The next token from the top of the stream.

setWordChars

setWordChars(fromSymbol: number, toSymbol: number, enable: boolean): void

Implementation of IWordState.setWordChars

Inherited from GenericWordState.setWordChars
- Defined in tokenizers/generic/GenericWordState.ts:76
Establish characters in the given range as valid characters for part of a word after the first character. Note that the tokenizer must determine which characters are valid as the beginning character of a word.

Parameters
- fromSymbol: number
  
  First character index of the interval.
- toSymbol: number
  
  Last character index of the interval.
- enable: boolean
  
  true if this state should use characters in the given range.
Returns void

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