24 lines
596 B
JavaScript
24 lines
596 B
JavaScript
const untouchedApply = Function.prototype.apply;
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const ApplySymbol = Symbol('apply');
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function safeExtractApply(f) {
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try {
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return f.apply;
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}
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catch (err) {
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return undefined;
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}
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}
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function safeApplyHacky(f, instance, args) {
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const ff = f;
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ff[ApplySymbol] = untouchedApply;
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const out = ff[ApplySymbol](instance, args);
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delete ff[ApplySymbol];
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return out;
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}
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export function safeApply(f, instance, args) {
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if (safeExtractApply(f) === untouchedApply) {
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return f.apply(instance, args);
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}
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return safeApplyHacky(f, instance, args);
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}
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