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Standard library header <exception>

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C++
Standard library headers

This header is part of the error handling library.

Contents

Types

base class for exceptions thrown by the standard library components
(class)
(C++11)
a mixin type to capture and store current exceptions
(class)
exception thrown when std::current_exception fails to copy the exception object
(class)
(deprecated in C++11) (removed in C++17)
the type of the function called by std::unexpected
(typedef)
the type of the function called by std::terminate
(typedef)
(C++11)
shared pointer type for handling exception objects
(typedef)

Functions

(deprecated in C++11) (removed in C++17)
function called when dynamic exception specification is violated
(function)
( removed in C++20* ) (C++17)
checks if exception handling is currently in progress
(function)
(C++11)
creates an std::exception_ptr from an exception object
(function template)
(C++11)
captures the current exception in a std::exception_ptr
(function)
(C++11)
throws the exception from an std::exception_ptr
(function)
(C++11)
throws its argument with std::nested_exception mixed in
(function template)
(C++11)
throws the exception from a std::nested_exception
(function template)
function called when exception handling fails
(function)
(C++11)
obtains the current terminate_handler
(function)
changes the function to be called by std::terminate
(function)
(deprecated in C++11) (removed in C++17)
obtains the current unexpected_handler
(function)
(deprecated in C++11) (removed in C++17)
changes the function to be called by std::unexpected
(function)

Synopsis 

// all freestanding
namespace std {
  class exception;
  class bad_exception;
  class nested_exception;
  using terminate_handler = void (*)();
  terminate_handler get_terminate() noexcept;
  terminate_handler set_terminate(terminate_handler f) noexcept;
  [[noreturn]] void terminate() noexcept;
  constexpr int uncaught_exceptions() noexcept;
  using exception_ptr = /* unspecified */;
  constexpr exception_ptr current_exception() noexcept;
  [[noreturn]] constexpr void rethrow_exception(exception_ptr p);
  template<class E> constexpr exception_ptr make_exception_ptr(E e) noexcept;
  template<class T> [[noreturn]] constexpr void throw_with_nested(T&& t);
  template<class E> constexpr void rethrow_if_nested(const E& e);
}

Class std::exception 

namespace std {
  class exception
  {
  public:
    constexpr exception() noexcept;
    constexpr exception(const exception&) noexcept;
    constexpr exception& operator=(const exception&) noexcept;
    constexpr virtual ~exception();
    constexpr virtual const char* what() const noexcept;
  };
}

Class std::bad_exception 

namespace std {
  class bad_exception : public exception
  {
  public:
    // see description for the specification of the special member functions
    constexpr const char* what() const noexcept override;
  };
}

Class std::nested_exception 

namespace std {
  class nested_exception
  {
  public:
    constexpr nested_exception() noexcept;
    constexpr nested_exception(const nested_exception&) noexcept = default;
    constexpr nested_exception& operator=(const nested_exception&) noexcept = default;
    constexpr virtual ~nested_exception() = default;
    // access functions
    [[noreturn]] constexpr void rethrow_nested() const;
    constexpr exception_ptr nested_ptr() const noexcept;
  };
  template<class T> [[noreturn]] constexpr void throw_with_nested(T&& t);
  template<class E> constexpr void rethrow_if_nested(const E& e);
}

See also