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| Current File : //proc/self/root/home/saurabh/.npm/_npx/249ca9fcd30c476a/node_modules/graphql/language/lexer.d.ts |
import { Token } from './ast';
import { Source } from './source';
import { TokenKindEnum } from './tokenKind';
/**
* Given a Source object, this returns a Lexer for that source.
* A Lexer is a stateful stream generator in that every time
* it is advanced, it returns the next token in the Source. Assuming the
* source lexes, the final Token emitted by the lexer will be of kind
* EOF, after which the lexer will repeatedly return the same EOF token
* whenever called.
*/
export class Lexer {
source: Source;
/**
* The previously focused non-ignored token.
*/
lastToken: Token;
/**
* The currently focused non-ignored token.
*/
token: Token;
/**
* The (1-indexed) line containing the current token.
*/
line: number;
/**
* The character offset at which the current line begins.
*/
lineStart: number;
constructor(source: Source);
/**
* Advances the token stream to the next non-ignored token.
*/
advance(): Token;
/**
* Looks ahead and returns the next non-ignored token, but does not change
* the state of Lexer.
*/
lookahead(): Token;
}
/**
* @internal
*/
export function isPunctuatorToken(token: Token): boolean;
/**
* @internal
*/
export function isPunctuatorTokenKind(kind: TokenKindEnum): boolean;
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