bitmark-grammar/src/typescript-es6/antlr4es6/misc/Character.js

A bitmark parser

/*!
 * Copyright 2016 The ANTLR Project. All rights reserved.
 * Licensed under the BSD-3-Clause license. See LICENSE file in the project root for license information.
 */
export function isHighSurrogate(ch) {
    return ch >= 0xD800 && ch <= 0xDBFF;
}
export function isLowSurrogate(ch) {
    return ch >= 0xDC00 && ch <= 0xDFFF;
}
export function isSupplementaryCodePoint(ch) {
    return ch >= 0x10000;
}