dist/modules/to.js
function toRegExp(val, def) {
    var exp = /^\/.+\/(g|i|m)?([m,i,u,y]{1,4})?/;
    var optsExp = /(g|i|m)?([m,i,u,y]{1,4})?$/;
    if (is_1.isRegExp(val))
        return val;
    if (!is_1.isValue(val) || !is_1.isString(val))
        return toDefault(null, def);
    function regExpFromStr() {
        var opts;
        if (exp.test(val)) {
            opts = optsExp.exec(val)[0];
            val = val.replace(/^\//, '').replace(optsExp, '').replace(/\/$/, '');
        }
        return new RegExp(val, opts);
    }
    return function_1.tryWrap(regExpFromStr)(def);
}
function toRegExp(val, def) {
    var exp = /^\/.+\/(g|i|m)?([m,i,u,y]{1,4})?/;
    var optsExp = /(g|i|m)?([m,i,u,y]{1,4})?$/;
    if (is_1.isRegExp(val))
        return val;
    if (!is_1.isValue(val) || !is_1.isString(val))
        return toDefault(null, def);
    function regExpFromStr() {
        var opts;
        if (exp.test(val)) {
            opts = optsExp.exec(val)[0];
            val = val.replace(/^\//, '').replace(optsExp, '').replace(/\/$/, '');
        }
        return new RegExp(val, opts);
    }
    return function_1.tryWrap(regExpFromStr)(def);
}
function toRegExp ( val , def ) { var exp = / ^\/.+\/(g|i|m)?([m,i,u,y]{1,4})? / ; var optsExp = / (g|i|m)?([m,i,u,y]{1,4})?$ / ; if ( is_1 . isRegExp ( val ) ) return val ; if ( ! is_1 . isValue ( val ) || ! is_1 . isString ( val ) ) return toDefault ( null , def ) ; function regExpFromStr ( ) { var opts ; if ( exp . test ( val ) ) { opts = optsExp . exec ( val ) [ 0 ] ; val = val . replace ( / ^\/ / , '' ) . replace ( optsExp , '' ) . replace ( / \/$ / , '' ) ; } return new RegExp ( val , opts ) ; } return function_1 . tryWrap ( regExpFromStr ) ( def ) ; }
To Regular Expression
Attempts to convert to a regular expression
from a string.

@param val the value to convert to RegExp.
@param def optional express as default on null.
To Regular Expression Attempts to convert to a regular expression from a string .