superfly-timeline/dist/resolver/lib/expression.js

Resolver for defining objects with temporal boolean logic relationships on a timeline

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.isNumericExpr = exports.isConstantExpr = void 0;
/** Returns true if an expression is a constant (ie doesn't reference something else) */
function isConstantExpr(str) {
    if (isNumericExpr(str))
        return true;
    if (typeof str === 'string') {
        const lStr = str.toLowerCase();
        if (lStr === 'true')
            return true;
        if (lStr === 'false')
            return true;
    }
    return false;
}
exports.isConstantExpr = isConstantExpr;
function isNumericExpr(str) {
    if (str === null)
        return false;
    if (typeof str === 'number')
        return true;
    if (typeof str === 'string')
        return !!/^[-+]?[0-9.]+$/.exec(str) && !isNaN(parseFloat(str));
    return false;
}
exports.isNumericExpr = isNumericExpr;
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