Questions tagged [exception-safety]
93 questions
0
votes
2 answers
Exception Safety example guarantee correct?
I discuss the Exception Safety Guaratees and devised an example that I think provides the Strong Guarantee:
template
void strongSort(vector &data, LT lt) // works on pointers
{
vector temp { data }; // bad_alloc?…
towi
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0
votes
1 answer
Where is it prohibited for target object of std::function to throw on destruction?
Consider std::function definition:
namespace std {
template class function; // not defined
template
class function {
public:
/* ... */
template function(F&&);
/*…
Alex Guteniev
- 12,039
- 2
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- 79
0
votes
1 answer
Exception safety in the composite pattern
I used the composite pattern to represent devices, which I would like to shut down before killing their power (calling their dtor).
I ran into a problem trying to group the devices, especially regarding their state.
How would I proceed in the…
Guy
- 23
- 4
0
votes
1 answer
Why kotlin provide null safety operator but not exception safety operator?
If kotlin promotes safe code such as:
val currentName = "Some Guy"
getDataFromServer()?.getUsers()?.find { it.name == currentName }?.profilePicture?.let {
showPicture(it)
} ?: let {
showAddPictureButton()
}
Why there is no similar syntax for…
xinaiz
- 7,744
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0
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1 answer
Is it worth making my code less readable for providing exception safety in case of out of memory errors?
I have a game with non-copyable Items as they are supposed to be unique:
class Item {
Item() noexcept;
Item(Item&&) noexcept;
Item(Item const&) = delete;
// ...
};
class Creature is capable of receiving an Item and adding it to their…
passing_through
- 1,778
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0
votes
1 answer
Exception safe of containers in c++
I came across this term exception safe of containers. I want to understand what exactly exception safe mean?
Are there are any comparison for this for different containers ?
Barry
- 133
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0
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1 answer
std::terminate and destructors of empty containers
Consider some standard container which uses dynamic memory (i.e. is an AllocatorAwareContainer) and has a size and capacity of zero. For example, take a std::vector and call vec.resize(0); vec.shrink_to_fit();.
I would imagine that such container…
Tomilov Anatoliy
- 15,657
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0
votes
1 answer
Cleanly and optionally redirect stderr or stdout to file
I have a Python3 script and I want to optionally redirect stdout and stderr to a file. Something like this:
# variable declarations
if log_output:
output_file = open('output.txt', 'w')
sys.stdout = output_file
if log_errors:
errors_file…
Ben
- 5,952
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0
votes
2 answers
C++ : other one simple scope guard
Lets ask you about this simple scope guard:
template
struct finop_t {
T& t;
~finop_t() { t(); }
};
#define FINALLY__(l, cl) \
auto FIN ## l ## clo = cl; \
finop_t FIN ## l ## fin { FIN ## l ##…
funny_falcon
- 427
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0
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0 answers
Trying to get my head around a couple of things: RAII and exception safety
Ok, so I think I understand RAII. I think I have an idea what exception safety is about too.
In order to conform to RAII, and in an attempt to make my code more exception safe, I have attempted to remove a margin for error from my cMain class.…
Mark
- 155
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0
votes
1 answer
Exception safety:
I would like to ask for some advice with regard to exception safety. In particular I have been referencing Do you (really) write exception safe code?. If I have a container of pointers to objects of type Node, and I were to clear and reinitialise…
user2406944
0
votes
2 answers
no-throw exception guarantee and stack overflow
There are several special functions which usually guarantee not to throw excpetions, e.g.:
Destructors
swap method
Consider the following swap implementation, as stated in this answer:
friend void swap(dumb_array& first, dumb_array& second)
{
…
Mikhail
- 20,685
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0
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1 answer
Lua, threads and C++ exceptions
I'm planning on suggesting to my development team that we start looking at lua instead of C++ for the project we're currently working on. On that subject I have a question that I need to clear up first.
With the current SDK, we are not allowed to…
Robin Heggelund Hansen
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0
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1 answer
Is uninitialized_copy() exception-safe?
MSDN and other places say that uninitialized_copy provides a strong exception guarantee, but other C++ references don't.
Is this in fact guaranteed by C++, or not?
user541686
- 205,094
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-1
votes
2 answers
Which exception safety guarantee do we have when copying a C++ container?
When any allocation of the new container or copying of the elements fails with an exception, will the current contents of the target container remain intact?
Bonita Montero
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