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Standard library header <exception>

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< cpp‎ | header
 
 
Standard library headers
Language support
<source_location> (C++20)
<exception>
<initializer_list> (C++11)
<compare> (C++20)

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<concepts> (C++20)
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<system_error> (C++11)

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<memory_resource> (C++17)  
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<type_traits> (C++11)
<ratio> (C++11)
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<utility>
<tuple> (C++11)
<optional> (C++17)
<variant> (C++17)
<any> (C++17)
<debugging> (C++26)
<expected> (C++23)
<bitset>
<charconv> (C++17)
<format> (C++20)
<bit> (C++20)

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<cfenv> (C++11)
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<cmath>
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<chrono> (C++11)
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<cstdio>
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<regex> (C++11)
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<stop_token> (C++20)
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<condition_variable> (C++11)  
<semaphore> (C++20)
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<barrier> (C++20)
<future> (C++11)
<hazard_pointer> (C++26)

C compatibility
<cstdbool> (C++11/17/20*)  
<ccomplex> (C++11/17/20*)
<ctgmath> (C++11/17/20*)

<cstdalign> (C++11/17/20*)

<ciso646> (until C++20)

 

This header is part of the error handling library.

Contents

Types

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

Functions

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

[edit] Synopsis

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;
 
  int uncaught_exceptions() noexcept;
 
  using exception_ptr = /* unspecified */;
 
  exception_ptr current_exception() noexcept;
  [[noreturn]] void rethrow_exception(exception_ptr p);
  template<class E> exception_ptr make_exception_ptr(E e) noexcept;
 
  template<class T> [[noreturn]] void throw_with_nested(T&& t);
  template<class E> void rethrow_if_nested(const E& e);
}

[edit] Class std::exception

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

[edit] Class std::bad_exception

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

[edit] Class std::nested_exception

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

[edit] See also