@1771technologies/lytenyte-pro/dist/expressions/lexer/tokenize/scan-identifier.js

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import { isAlphaNumeric } from "../predicates/is-alpha-numeric.js";
const KEYWORDS = new Map([
    ["true", { type: "Boolean", value: "true" }],
    ["false", { type: "Boolean", value: "false" }],
    ["null", { type: "Null", value: "null" }],
    ["undefined", { type: "Undefined", value: "undefined" }],
    ["in", { type: "Operator", value: "in" }],
    ["not", { type: "Operator", value: "not" }],
]);
export function scanIdentifier(source, start) {
    let i = start;
    while (i < source.length && isAlphaNumeric(source[i]))
        i++;
    const value = source.slice(start, i);
    const kw = KEYWORDS.get(value);
    if (kw) {
        return { type: kw.type, value: kw.value, end: i };
    }
    return { type: "Identifier", value, end: i };
}