From Jason Turner

[alloc.errors]

C++14 → C++17 3.6 KB 39 lines
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Archived: C++14 | C++17
Markdown: C++14 | C++17
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C++ Weekly: Ep 451

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  1. tmp/tmpc1a9hsw6/{from.md → to.md} +22 -11
tmp/tmpc1a9hsw6/{from.md → to.md} RENAMED
@@ -7,11 +7,11 @@ namespace std {
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  class bad_alloc : public exception {
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  public:
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  bad_alloc() noexcept;
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  bad_alloc(const bad_alloc&) noexcept;
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  bad_alloc& operator=(const bad_alloc&) noexcept;
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- virtual const char* what() const noexcept;
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  };
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  }
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  ```
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  The class `bad_alloc` defines the type of objects thrown as exceptions
@@ -21,55 +21,64 @@ by the implementation to report a failure to allocate storage.
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  bad_alloc() noexcept;
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  ```
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  *Effects:* Constructs an object of class `bad_alloc`.
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- *Remarks:* The result of calling `what()` on the newly constructed
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- object is implementation-defined.
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-
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  ``` cpp
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  bad_alloc(const bad_alloc&) noexcept;
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  bad_alloc& operator=(const bad_alloc&) noexcept;
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  ```
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  *Effects:* Copies an object of class `bad_alloc`.
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  ``` cpp
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- virtual const char* what() const noexcept;
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  ```
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  *Returns:* An *implementation-defined* NTBS.
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  #### Class `bad_array_new_length` <a id="new.badlength">[[new.badlength]]</a>
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  ``` cpp
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  namespace std {
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  class bad_array_new_length : public bad_alloc {
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  public:
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  bad_array_new_length() noexcept;
 
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  };
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  }
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  ```
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  The class `bad_array_new_length` defines the type of objects thrown as
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  exceptions by the implementation to report an attempt to allocate an
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- array of size less than zero or greater than an implementation-defined
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  limit ([[expr.new]]).
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  ``` cpp
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  bad_array_new_length() noexcept;
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  ```
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  *Effects:* constructs an object of class `bad_array_new_length`.
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- *Remarks:* the result of calling `what()` on the newly constructed
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- object is implementation-defined.
 
 
 
 
 
 
 
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  #### Type `new_handler` <a id="new.handler">[[new.handler]]</a>
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  ``` cpp
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- typedef void (*new_handler)();
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  ```
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  The type of a *handler function* to be called by `operator new()` or
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  `operator new[]()` ([[new.delete]]) when they cannot satisfy a request
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  for additional storage.
@@ -77,11 +86,11 @@ for additional storage.
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  *Required behavior:* A `new_handler` shall perform one of the following:
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  - make more storage available for allocation and then return;
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  - throw an exception of type `bad_alloc` or a class derived from
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  `bad_alloc`;
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- - terminate execution of the program without returning to the caller;
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  #### `set_new_handler` <a id="set.new.handler">[[set.new.handler]]</a>
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  ``` cpp
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  new_handler set_new_handler(new_handler new_p) noexcept;
@@ -98,7 +107,9 @@ new_handler set_new_handler(new_handler new_p) noexcept;
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  ``` cpp
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  new_handler get_new_handler() noexcept;
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  ```
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- *Returns:* The current `new_handler`. This may be a null pointer value.
 
 
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  class bad_alloc : public exception {
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  public:
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  bad_alloc() noexcept;
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  bad_alloc(const bad_alloc&) noexcept;
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  bad_alloc& operator=(const bad_alloc&) noexcept;
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+ const char* what() const noexcept override;
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  };
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  }
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  ```
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  The class `bad_alloc` defines the type of objects thrown as exceptions
 
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  bad_alloc() noexcept;
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  ```
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  *Effects:* Constructs an object of class `bad_alloc`.
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  ``` cpp
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  bad_alloc(const bad_alloc&) noexcept;
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  bad_alloc& operator=(const bad_alloc&) noexcept;
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  ```
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  *Effects:* Copies an object of class `bad_alloc`.
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  ``` cpp
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+ const char* what() const noexcept override;
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  ```
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  *Returns:* An *implementation-defined* NTBS.
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+ *Remarks:* The message may be a null-terminated multibyte
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+ string ([[multibyte.strings]]), suitable for conversion and display as
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+ a `wstring` ([[string.classes]], [[locale.codecvt]]).
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+
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  #### Class `bad_array_new_length` <a id="new.badlength">[[new.badlength]]</a>
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  ``` cpp
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  namespace std {
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  class bad_array_new_length : public bad_alloc {
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  public:
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  bad_array_new_length() noexcept;
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+ const char* what() const noexcept override;
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  };
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  }
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  ```
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  The class `bad_array_new_length` defines the type of objects thrown as
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  exceptions by the implementation to report an attempt to allocate an
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+ array of size less than zero or greater than an *implementation-defined*
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  limit ([[expr.new]]).
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  ``` cpp
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  bad_array_new_length() noexcept;
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  ```
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  *Effects:* constructs an object of class `bad_array_new_length`.
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+ ``` cpp
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+ const char* what() const noexcept override;
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+ ```
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+
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+ *Returns:* An *implementation-defined* NTBS.
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+
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+ *Remarks:* The message may be a null-terminated multibyte
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+ string ([[multibyte.strings]]), suitable for conversion and display as
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+ a `wstring` ([[string.classes]], [[locale.codecvt]]).
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  #### Type `new_handler` <a id="new.handler">[[new.handler]]</a>
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  ``` cpp
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+ using new_handler = void (*)();
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  ```
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  The type of a *handler function* to be called by `operator new()` or
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  `operator new[]()` ([[new.delete]]) when they cannot satisfy a request
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  for additional storage.
 
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  *Required behavior:* A `new_handler` shall perform one of the following:
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  - make more storage available for allocation and then return;
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  - throw an exception of type `bad_alloc` or a class derived from
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  `bad_alloc`;
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+ - terminate execution of the program without returning to the caller.
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  #### `set_new_handler` <a id="set.new.handler">[[set.new.handler]]</a>
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  ``` cpp
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  new_handler set_new_handler(new_handler new_p) noexcept;
 
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  ``` cpp
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  new_handler get_new_handler() noexcept;
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  ```
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+ *Returns:* The current `new_handler`.
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+
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+ [*Note 1*: This may be a null pointer value. — *end note*]
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