tmp/tmp6sjaakpi/{from.md → to.md}
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### Class `bad_optional_access` <a id="optional.bad.access">[[optional.bad.access]]</a>
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``` cpp
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class bad_optional_access : public exception {
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public:
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bad_optional_access();
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};
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```
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The class `bad_optional_access` defines the type of objects thrown as
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exceptions to report the situation where an attempt is made to access
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the value of an optional object that does not contain a value.
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``` cpp
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bad_optional_access();
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```
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*Effects:* Constructs an object of class `bad_optional_access`.
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*Postconditions:* `what()` returns an *implementation-defined* NTBS.
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