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util: add inspect suffix to BigInt64Array elements

This commit updates `util.inspect` to add an `n` suffix to BigInts that
appear in BigInt64Arrays. BigInts are formatted with an `n` suffix in
most cases, but this did not occur in BigInt64Arrays due to an apparent
oversight where the implementation of `inspect` for typed arrays assumed
that all typed array elements are numbers.

PR-URL: #21499
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yuta Hiroto <hello@hiroppy.me>
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not-an-aardvark committed Jun 24, 2018
1 parent dcb371f commit 80496a55708967d1fb124cdbaf296b86eca31ff3
Showing with 11 additions and 2 deletions.
  1. +9 −2 lib/util.js
  2. +2 −0 test/parallel/test-util-inspect-bigint.js
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@@ -739,6 +739,10 @@ function formatNumber(fn, value) {
return fn(`${value}`, 'number');
}
function formatBigInt(fn, value) {
return fn(`${value}n`, 'bigint');
}
function formatPrimitive(fn, value, ctx) {
if (typeof value === 'string') {
if (ctx.compact === false &&
@@ -779,7 +783,7 @@ function formatPrimitive(fn, value, ctx) {
return formatNumber(fn, value);
// eslint-disable-next-line valid-typeof
if (typeof value === 'bigint')
return fn(`${value}n`, 'bigint');
return formatBigInt(fn, value);
if (typeof value === 'boolean')
return fn(`${value}`, 'boolean');
if (typeof value === 'undefined')
@@ -915,8 +919,11 @@ function formatTypedArray(ctx, value, recurseTimes, keys) {
const maxLength = Math.min(Math.max(0, ctx.maxArrayLength), value.length);
const remaining = value.length - maxLength;
const output = new Array(maxLength + (remaining > 0 ? 1 : 0));
const elementFormatter = value.length > 0 && typeof value[0] === 'number' ?
formatNumber :
formatBigInt;
for (var i = 0; i < maxLength; ++i)
output[i] = formatNumber(ctx.stylize, value[i]);
output[i] = elementFormatter(ctx.stylize, value[i]);
if (remaining > 0)
output[i] = `... ${remaining} more item${remaining > 1 ? 's' : ''}`;
if (ctx.showHidden) {
@@ -10,3 +10,5 @@ const { inspect } = require('util');
assert.strictEqual(inspect(1n), '1n');
assert.strictEqual(inspect(Object(-1n)), '[BigInt: -1n]');
assert.strictEqual(inspect(Object(13n)), '[BigInt: 13n]');
assert.strictEqual(inspect(new BigInt64Array([0n])), 'BigInt64Array [ 0n ]');
assert.strictEqual(inspect(new BigUint64Array([0n])), 'BigUint64Array [ 0n ]');

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