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BetterDiscordApp-v2
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Code Issues 3 Releases Wiki Activity

Fix syntax error at `%`

This commit is contained in:
Samuel Elliott 2018-07-20 21:10:44 +01:00
parent 5301498978
commit 19bbd4215c
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GPG Key ID: 8420C7CDE43DC4D6
1 changed files with 27 additions and 17 deletions
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44
common/modules/iterable-weak-collections.js
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@ -121,41 +121,51 @@ export class IterableWeakCollections {
}
static _init() {
const v8 = process.binding('v8');
// Enable natives syntax
v8.setFlagsFromString('--allow_natives_syntax');
this._natives_syntax = process.execArgv.some(s => /^--allow[-_]natives[-_]syntax$/.test(s));
// Use eval otherwise webpack will throw a syntax error
// eslint-disable-next-line no-eval
this._getWeakMapEntries = eval(`(function (wm, max) {
this._getWeakMapEntries = eval(`this._callWithNativesSyntax.bind(this, function (wm, max) {
// Retrieve all WeakMap instance key / value pairs up to \`max\`. \`max\` limits the
// number of key / value pairs returned. Make sure it is a positive number,
// otherwise V8 aborts. Passing through \`0\` returns all elements.
if (!(wm instanceof WeakMap)) throw new Error('weakmap must be an instance of WeakMap');
return %GetWeakMapEntries(wm, typeof max === 'number' && max > 0 ? max : 0);
})`);
}, this)`);
// eslint-disable-next-line no-eval
this._getWeakSetValues = eval(`(function (ws, max) {
this._getWeakSetValues = eval(`this._callWithNativesSyntax.bind(this, function (ws, max) {
// Retrieve all WeakSet instance values up to \`max\`. \`max\` limits the
// number of values returned. Make sure it is a positive number,
// otherwise V8 aborts. Passing through \`0\` returns all elements.
if (!(ws instanceof WeakSet)) throw new Error('weakset must be an instance of WeakSet');
return %GetWeakSetValues(ws, typeof max === 'number' && max > 0 ? max : 0);
})`);
}, this)`);
}
// Warm up the map and set iterator preview functions. V8 compiles
// functions lazily (unless --nolazy is set) so we need to do this
// before we turn off --allow_natives_syntax again.
this._getWeakMapEntries(new WeakMap(), 1);
this._getWeakSetValues(new WeakSet(), 1);
static _callWithNativesSyntax(f, bind, ...args) {
const v8 = process.binding('v8');
// Disable --allow_natives_syntax again unless it was explicitly
// specified on the command line
if (!process.execArgv.some(s => /^--allow[-_]natives[-_]syntax$/.test(s))) v8.setFlagsFromString('--noallow_natives_syntax');
// Enable natives syntax
v8.setFlagsFromString('--allow_natives_syntax');
try {
const r = f.apply(bind, args);
// Disable --allow_natives_syntax again unless it was explicitly
// specified on the command line
if (!this._natives_syntax) v8.setFlagsFromString('--noallow_natives_syntax');
return r;
} catch (err) {
// Disable --allow_natives_syntax again unless it was explicitly
// specified on the command line
if (!this._natives_syntax) v8.setFlagsFromString('--noallow_natives_syntax');
throw err;
}
}
}
IterableWeakCollections._init();
IterableWeakCollections._callWithNativesSyntax(IterableWeakCollections._init, IterableWeakCollections);