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author | ZYSzys <zyszys98@gmail.com> | 2019-03-19 14:00:49 +0800 |
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committer | Ruben Bridgewater <ruben@bridgewater.de> | 2019-03-21 23:07:48 +0100 |
commit | 5f032a7a269b66d48505869b0ae4fb1db403b118 (patch) | |
tree | 31a36eb4930ee6d4893111683b49eb1e2667f9ee /lib/internal/util.js | |
parent | 20fab5f5d49e952451e47c0d819268364ea5c7c5 (diff) | |
download | android-node-v8-5f032a7a269b66d48505869b0ae4fb1db403b118.tar.gz android-node-v8-5f032a7a269b66d48505869b0ae4fb1db403b118.tar.bz2 android-node-v8-5f032a7a269b66d48505869b0ae4fb1db403b118.zip |
util: extract uncurryThis function for reuse
PR-URL: https://github.com/nodejs/node/pull/23081
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Weijia Wang <starkwang@126.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: John-David Dalton <john.david.dalton@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Diffstat (limited to 'lib/internal/util.js')
-rw-r--r-- | lib/internal/util.js | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/internal/util.js b/lib/internal/util.js index bb2a101c4e..f5b5fbedd4 100644 --- a/lib/internal/util.js +++ b/lib/internal/util.js @@ -385,6 +385,17 @@ function once(callback) { }; } +const ReflectApply = Reflect.apply; + +// This function is borrowed from the function with the same name on V8 Extras' +// `utils` object. V8 implements Reflect.apply very efficiently in conjunction +// with the spread syntax, such that no additional special case is needed for +// function calls w/o arguments. +// Refs: https://github.com/v8/v8/blob/d6ead37d265d7215cf9c5f768f279e21bd170212/src/js/prologue.js#L152-L156 +function uncurryThis(func) { + return (thisArg, ...args) => ReflectApply(func, thisArg, args); +} + module.exports = { assertCrypto, cachedResult, @@ -405,6 +416,7 @@ module.exports = { promisify, spliceOne, removeColors, + uncurryThis, // Symbol used to customize promisify conversion customPromisifyArgs: kCustomPromisifyArgsSymbol, |