DF
Он конкретно про конструкторы говорит
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2020 May 29
DF
Dollar Føølish
function try block is to translate an exception thrown from a base or member subobject. That's Moral #1. Moral #2 says that destructor function try blocks are entirely usele—
“—But wait!” I hear someone interrupting from the middle of the room. “I don't agree with Moral #1. I can think of another possible use for constructor function try blocks—to free resources allocated in the initializer list or in the constructor body!”
Sorry, no. Remember that once you get into your constructor try block's handler, any local variables in the constructor body are also already out of scope, and you are guaranteed that no base subobjects or member objects exist anymore, period. You can't even refer to their names. Either the parts of your object were never constructed, or those that were constructed have already been destroyed. So you can't be cleaning up anything that relies on referring to a base or member of the class (and anyway, that's what the base and member destructors are for, right?).
“—But wait!” I hear someone interrupting from the middle of the room. “I don't agree with Moral #1. I can think of another possible use for constructor function try blocks—to free resources allocated in the initializer list or in the constructor body!”
Sorry, no. Remember that once you get into your constructor try block's handler, any local variables in the constructor body are also already out of scope, and you are guaranteed that no base subobjects or member objects exist anymore, period. You can't even refer to their names. Either the parts of your object were never constructed, or those that were constructed have already been destroyed. So you can't be cleaning up anything that relies on referring to a base or member of the class (and anyway, that's what the base and member destructors are for, right?).
Вот
DF
А, прошу прощения я страницей ошибся
DF
A Step Toward Morality
Incidentally, this also means that the only (repeat only) possible use for a constructor function try block is to translate an exception thrown from a base or member subobject. That's Moral #1. Moral #2 says that destructor function try blocks are entirely useless
Incidentally, this also means that the only (repeat only) possible use for a constructor function try block is to translate an exception thrown from a base or member subobject. That's Moral #1. Moral #2 says that destructor function try blocks are entirely useless
A
О, приветствую в чате
AK
О, приветствую в чате
Привет.
A
Dollar Føølish
A Step Toward Morality
Incidentally, this also means that the only (repeat only) possible use for a constructor function try block is to translate an exception thrown from a base or member subobject. That's Moral #1. Moral #2 says that destructor function try blocks are entirely useless
Incidentally, this also means that the only (repeat only) possible use for a constructor function try block is to translate an exception thrown from a base or member subobject. That's Moral #1. Moral #2 says that destructor function try blocks are entirely useless
Ну да
DF
Если ты ее не транслирует то она будет переброшена все равно
DF
Я об этом уже полчаса говорю
DF
Попробуйте на годболте запустить constructor try block любой пример
DF
Вот любой где случается эксепшн
DF
Я с телефона,не могу
v
Я этого не вижу.
Теперь вижу.
Every catch-clause in the function-try-block for a constructor must terminate by throwing an exception. If the control reaches the end of such handler, the current exception is automatically rethrown as if by throw;. The return statement is not allowed in any catch clause of a constructor's function-try-block.
Every catch-clause in the function-try-block for a constructor must terminate by throwing an exception. If the control reaches the end of such handler, the current exception is automatically rethrown as if by throw;. The return statement is not allowed in any catch clause of a constructor's function-try-block.
AS
В @supapro с текстом задания