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result: Check against self-assignment in ResultVal's copy assignment operator
Avoids doing work that doesn't need to be done.
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@ -200,6 +200,9 @@ public:
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}
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ResultVal& operator=(const ResultVal& o) {
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if (this == &o) {
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return *this;
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}
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if (!empty()) {
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if (!o.empty()) {
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object = o.object;
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