@aws-lambda-powertools/jmespath/lib/esm/constants.js

A type safe and modern jmespath module to parse and extract data from JSON documents using JMESPath

/**
 * The binding powers for the various tokens in the JMESPath grammar.
 *
 * The binding powers are used to determine the order of operations for
 * the parser. The higher the binding power, the more tightly the token
 * binds to its arguments.
 */
const BINDING_POWER = {
    eof: 0,
    unquoted_identifier: 0,
    quoted_identifier: 0,
    literal: 0,
    rbracket: 0,
    rparen: 0,
    comma: 0,
    rbrace: 0,
    number: 0,
    current: 0,
    expref: 0,
    colon: 0,
    pipe: 1,
    or: 2,
    and: 3,
    eq: 5,
    gt: 5,
    lt: 5,
    gte: 5,
    lte: 5,
    ne: 5,
    flatten: 9,
    // Everything above stops a projection.
    star: 20,
    filter: 21,
    dot: 40,
    not: 45,
    lbrace: 50,
    lbracket: 55,
    lparen: 60,
};
/**
 * The set of ASCII lowercase letters allowed in JMESPath identifiers.
 */
const ASCII_LOWERCASE = 'abcdefghijklmnopqrstuvwxyz';
/**
 * The set of ASCII uppercase letters allowed in JMESPath identifiers.
 */
const ASCII_UPPERCASE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
/**
 * The set of ASCII letters allowed in JMESPath identifiers.
 */
const ASCII_LETTERS = ASCII_LOWERCASE + ASCII_UPPERCASE;
/**
 * The set of ASCII digits allowed in JMESPath identifiers.
 */
const DIGITS = '0123456789';
/**
 * The set of ASCII letters and digits allowed in JMESPath identifiers.
 */
const START_IDENTIFIER = new Set(`${ASCII_LETTERS}_`);
/**
 * The set of ASCII letters and digits allowed in JMESPath identifiers.
 */
const VALID_IDENTIFIER = new Set(`${ASCII_LETTERS}${DIGITS}_`);
/**
 * The set of ASCII digits allowed in JMESPath identifiers.
 */
const VALID_NUMBER = new Set(DIGITS);
/**
 * The set of ASCII whitespace characters allowed in JMESPath identifiers.
 */
const WHITESPACE = new Set(' \t\n\r');
/**
 * The set of simple tokens in the JMESPath grammar.
 */
const SIMPLE_TOKENS = new Map([
    ['.', 'dot'],
    ['*', 'star'],
    [':', 'colon'],
    [']', 'rbracket'],
    [',', 'comma'],
    [':', 'colon'],
    ['@', 'current'],
    ['(', 'lparen'],
    [')', 'rparen'],
    ['{', 'lbrace'],
    ['}', 'rbrace'],
]);
export { BINDING_POWER, SIMPLE_TOKENS, START_IDENTIFIER, VALID_IDENTIFIER, VALID_NUMBER, WHITESPACE, };