19 Diagnostics library [diagnostics]

19.2 Exception classes [std.exceptions]

19.2.11 Class underflow_error [underflow.error]

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namespace std { class underflow_error : public runtime_error { public: constexpr explicit underflow_error(const string& what_arg); constexpr explicit underflow_error(const char* what_arg); }; }
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The class underflow_error defines the type of objects thrown as exceptions to report an arithmetic underflow error.
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constexpr underflow_error(const string& what_arg);
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Postconditions: strcmp(what(), what_arg.c_str() == 0.
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constexpr underflow_error(const char* what_arg);
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Postconditions: strcmp(what(), what_arg) == 0.

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