js/src/util/pretty.ts

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/** @ignore */ const undf = void (0);

/** @ignore */
export function valueToString(x: any): string {
    if (x === null) { return 'null'; }
    if (x === undf) { return 'undefined'; }
    switch (typeof x) {
        case 'number': return `${x}`;
        case 'bigint': return `${x}`;
        case 'string': return `"${x}"`;
    }
    // If [Symbol.toPrimitive] is implemented (like in BN)
    // use it instead of JSON.stringify(). This ensures we
    // print BigInts, Decimals, and Binary in their native
    // representation
    if (typeof x[Symbol.toPrimitive] === 'function') {
        return x[Symbol.toPrimitive]('string');
    }
    if (ArrayBuffer.isView(x)) {
        if (x instanceof BigInt64Array || x instanceof BigUint64Array) {
            return `[${[...x].map(x => valueToString(x))}]`;
        }
        return `[${x}]`;
    }
    return ArrayBuffer.isView(x) ? `[${x}]` : JSON.stringify(x, (_, y) => typeof y === 'bigint' ? `${y}` : y);
}