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add support for bigint #970

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add support for bigint #970

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a8c5e7e
add support for bigint
alexey-sh Feb 16, 2021
d01cb27
fix bigint support
alexey-sh Feb 17, 2021
c594f4c
add 2 simple tests for bigint
alexey-sh Feb 17, 2021
5584d58
add support bigint for nested objects
alexey-sh Feb 17, 2021
3632ee3
add test for bigint in nested objects
alexey-sh Feb 17, 2021
0822130
Update test/basic.test.js
alexey-sh Feb 17, 2021
eb64c0d
Update test/basic.test.js
alexey-sh Feb 17, 2021
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10 changes: 9 additions & 1 deletion lib/tools.js
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Original file line number Diff line number Diff line change
Expand Up @@ -123,6 +123,9 @@ function asJson (obj, msg, num, time) {
case 'undefined':
case 'function':
continue
case 'bigint':
value = (stringifier || asString)(value.toString() + 'n')
break
case 'number':
/* eslint no-fallthrough: "off" */
if (Number.isFinite(value) === false) {
Expand Down Expand Up @@ -396,7 +399,12 @@ function final (logger, handler) {

function stringify (obj) {
try {
return JSON.stringify(obj)
return JSON.stringify(obj, (key, value) => {
if (typeof value === 'bigint') {
return value.toString() + 'n'
}
return value
})
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This is going to slow us down significanfly. I'm -1 to us landing this feature.

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The deep object benchmarks confirm this.

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This is going to slow us down significanfly.

have you checked the case then JSON.strigify throws an error? I bet it goes down a lot.

I'm -1 to us landing this feature.

and -{a lot of users} because luck of bigint support.

––––

I guess it's possible to cofigure pino to skip bigint check. does it sound fine for you guys?

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Thanks for the pull request. We have had a discussion and have determined that BigInt needs better support in general. This implementation negatively impacts our benchmarks even when a BigInt is not present.

} catch (_) {
return stringifySafe(obj)
}
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46 changes: 46 additions & 0 deletions test/basic.test.js
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Expand Up @@ -509,6 +509,52 @@ test('handles objects with null prototype', async ({ same }) => {
})
})

test('normalize bigint to string', async ({ same }) => {
const stream = sink()
const instance = pino(stream)
const bigInt = 1n
instance.info({ bigInt })
const result = await once(stream, 'data')
delete result.time
same(result, {
pid,
hostname,
level: 30,
bigInt: `${bigInt.toString()}n`
})
})

test('normalize nested object with bigint to string', async ({ same }) => {
const stream = sink()
const instance = pino(stream)
const bigInt = { a: { b: 1n } }
instance.info({ bigInt })
const result = await once(stream, 'data')
delete result.time
same(result, {
pid,
hostname,
level: 30,
bigInt: { a: { b: '1n' } }
})
})

test('object and format bigInt property', async ({ same }) => {
const stream = sink()
const instance = pino(stream)
instance.info({ answer: 42n, foo: { bar: BigInt(Number.MAX_SAFE_INTEGER) + 10n } }, 'foo %s', 1n)
const result = await once(stream, 'data')
delete result.time
same(result, {
pid,
hostname,
level: 30,
msg: 'foo 1',
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Why doesn't this have the n suffix?

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tbh idk. is it important? would you like me to add the suffix?

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The other outputs in this PR have the suffix. I'm asking about it from a consistency standpoint. How will an interpreter know that it is a BigInt without the suffix?

answer: '42n',
foo: { bar: '9007199254741001n' }
})
})

test('pino.destination', async ({ same }) => {
const tmp = join(
os.tmpdir(),
Expand Down