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When an exception is thrown, it may be caught by the following types of catch handlers:
A handler that can accept any type (using the ellipsis syntax).
A handler that accepts the same type as the exception object; because it is a copy, const and volatile modifiers are ignored.
A handler that accepts a reference to the same type as the exception object.
A handler that accepts a reference to a const or volatile form of the same type as the exception object.
A handler that accepts a base class of the same type as the exception object; since it is a copy, const and volatile modifiers are ignored. The catch handler for a base class must not precede the catch handler for the derived class.
A handler that accepts a reference to a base class of the same type as the exception object.
A handler that accepts a reference to a const or volatile form of a base class of the same type as the exception object.
A handler that accepts a pointer to which a thrown pointer object can be converted via standard pointer conversion rules.
@幻の上帝 没有明确提及必须是public继承啊
A handler that can accept any type (using the ellipsis syntax).
A handler that accepts the same type as the exception object; because it is a copy, const and volatile modifiers are ignored.
A handler that accepts a reference to the same type as the exception object.
A handler that accepts a reference to a const or volatile form of the same type as the exception object.
A handler that accepts a base class of the same type as the exception object; since it is a copy, const and volatile modifiers are ignored. The catch handler for a base class must not precede the catch handler for the derived class.
A handler that accepts a reference to a base class of the same type as the exception object.
A handler that accepts a reference to a const or volatile form of a base class of the same type as the exception object.
A handler that accepts a pointer to which a thrown pointer object can be converted via standard pointer conversion rules.
@幻の上帝 没有明确提及必须是public继承啊
WG21/N4567
15.3
3 A handler is a match for an exception object of type E if
(3.1) — The handler is of type cv T or cv T& and E and T are the same type (ignoring the top-level cv-qualifiers),
or
(3.2) — the handler is of type cv T or cv T& and T is an unambiguous public base class of E, or
(3.3) — the handler is of type cv T or const T& where T is a pointer type and E is a pointer type that can be
converted to T by one or more of
(3.3.1) — a standard pointer conversion (4.10) not involving conversions to pointers to private or protected
or ambiguous classes
(3.3.2) — a function pointer conversion (4.12)
(3.3.3) — a qualification conversion (4.4, or
(3.4) — the handler is of type cv T or const T& where T is a pointer or pointer to member type and E is
std::nullptr_t.
15.3
3 A handler is a match for an exception object of type E if
(3.1) — The handler is of type cv T or cv T& and E and T are the same type (ignoring the top-level cv-qualifiers),
or
(3.2) — the handler is of type cv T or cv T& and T is an unambiguous public base class of E, or
(3.3) — the handler is of type cv T or const T& where T is a pointer type and E is a pointer type that can be
converted to T by one or more of
(3.3.1) — a standard pointer conversion (4.10) not involving conversions to pointers to private or protected
or ambiguous classes
(3.3.2) — a function pointer conversion (4.12)
(3.3.3) — a qualification conversion (4.4, or
(3.4) — the handler is of type cv T or const T& where T is a pointer or pointer to member type and E is
std::nullptr_t.
