Does this specific c++ code have undefined behavior? [on hold]
up vote
-6
down vote
favorite
In this code. It sets array's size 0. And we can't access it. So I think it has undefined behavior. Is it correct thinking?
int varname{};
c++ undefined-behavior
asked Nov 10 at 12:26
張皓雨
11
put on hold as unclear what you're asking by πάντα ῥεῖ, Konrad Rudolph, Matthieu Brucher, Robert Columbia, ekad Nov 10 at 13:19
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
|
show 2 more comments
up vote
-6
down vote
favorite
In this code. It sets array's size 0. And we can't access it. So I think it has undefined behavior. Is it correct thinking?
int varname{};
c++ undefined-behavior
asked Nov 10 at 12:26
張皓雨
11
put on hold as unclear what you're asking by πάντα ῥεῖ, Konrad Rudolph, Matthieu Brucher, Robert Columbia, ekad Nov 10 at 13:19
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
3
This doesn't even compile for me.
– tkausl
Nov 10 at 12:28
1
I think what you might be getting at is are zero sized arrays OK - herbsutter.com/2009/09/02/when-is-a-zero-length-array-okay
– Jeff Foster
Nov 10 at 12:29
This code can be compiled.
– 張皓雨
Nov 10 at 12:30
@張皓雨 Not with a conforming C++ compiler: “error: zero-size array 'varname'”. It’s allowed as an extension by various compilers but since it’s not covered by the C++ standard we can’t make assertions about its behaviour according to the standard.
– Konrad Rudolph
Nov 10 at 12:31
2
@張皓雨 "This code can be compiled." Nope, it can't be compiled
– πάντα ῥεῖ
Nov 10 at 12:32
|
show 2 more comments
up vote
-6
down vote
favorite
up vote
-6
down vote
favorite
In this code. It sets array's size 0. And we can't access it. So I think it has undefined behavior. Is it correct thinking?
int varname{};
c++ undefined-behavior
asked Nov 10 at 12:26
張皓雨
11
In this code. It sets array's size 0. And we can't access it. So I think it has undefined behavior. Is it correct thinking?
int varname{};
c++ undefined-behavior
c++ undefined-behavior
asked Nov 10 at 12:26
張皓雨
11
asked Nov 10 at 12:26
張皓雨
11
asked Nov 10 at 12:26
張皓雨
11
asked Nov 10 at 12:26
張皓雨
11
asked Nov 10 at 12:26
張皓雨
11
11
put on hold as unclear what you're asking by πάντα ῥεῖ, Konrad Rudolph, Matthieu Brucher, Robert Columbia, ekad Nov 10 at 13:19
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
put on hold as unclear what you're asking by πάντα ῥεῖ, Konrad Rudolph, Matthieu Brucher, Robert Columbia, ekad Nov 10 at 13:19
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
3
This doesn't even compile for me.
– tkausl
Nov 10 at 12:28
1
I think what you might be getting at is are zero sized arrays OK - herbsutter.com/2009/09/02/when-is-a-zero-length-array-okay
– Jeff Foster
Nov 10 at 12:29
This code can be compiled.
– 張皓雨
Nov 10 at 12:30
@張皓雨 Not with a conforming C++ compiler: “error: zero-size array 'varname'”. It’s allowed as an extension by various compilers but since it’s not covered by the C++ standard we can’t make assertions about its behaviour according to the standard.
– Konrad Rudolph
Nov 10 at 12:31
2
@張皓雨 "This code can be compiled." Nope, it can't be compiled
– πάντα ῥεῖ
Nov 10 at 12:32
|
show 2 more comments
3
This doesn't even compile for me.
– tkausl
Nov 10 at 12:28
1
I think what you might be getting at is are zero sized arrays OK - herbsutter.com/2009/09/02/when-is-a-zero-length-array-okay
– Jeff Foster
Nov 10 at 12:29
This code can be compiled.
– 張皓雨
Nov 10 at 12:30
@張皓雨 Not with a conforming C++ compiler: “error: zero-size array 'varname'”. It’s allowed as an extension by various compilers but since it’s not covered by the C++ standard we can’t make assertions about its behaviour according to the standard.
– Konrad Rudolph
Nov 10 at 12:31
2
@張皓雨 "This code can be compiled." Nope, it can't be compiled
– πάντα ῥεῖ
Nov 10 at 12:32
3
3
This doesn't even compile for me.
– tkausl
Nov 10 at 12:28
This doesn't even compile for me.
– tkausl
Nov 10 at 12:28
1
1
I think what you might be getting at is are zero sized arrays OK - herbsutter.com/2009/09/02/when-is-a-zero-length-array-okay
– Jeff Foster
Nov 10 at 12:29
I think what you might be getting at is are zero sized arrays OK - herbsutter.com/2009/09/02/when-is-a-zero-length-array-okay
– Jeff Foster
Nov 10 at 12:29
This code can be compiled.
– 張皓雨
Nov 10 at 12:30
This code can be compiled.
– 張皓雨
Nov 10 at 12:30
@張皓雨 Not with a conforming C++ compiler: “error: zero-size array 'varname'”. It’s allowed as an extension by various compilers but since it’s not covered by the C++ standard we can’t make assertions about its behaviour according to the standard.
– Konrad Rudolph
Nov 10 at 12:31
@張皓雨 Not with a conforming C++ compiler: “error: zero-size array 'varname'”. It’s allowed as an extension by various compilers but since it’s not covered by the C++ standard we can’t make assertions about its behaviour according to the standard.
– Konrad Rudolph
Nov 10 at 12:31
2
2
@張皓雨 "This code can be compiled." Nope, it can't be compiled
– πάντα ῥεῖ
Nov 10 at 12:32
@張皓雨 "This code can be compiled." Nope, it can't be compiled
– πάντα ῥεῖ
Nov 10 at 12:32
|
show 2 more comments
active
oldest
votes
active
oldest
votes
active
oldest
votes
active
oldest
votes
active
oldest
votes
3
This doesn't even compile for me.
– tkausl
Nov 10 at 12:28
1
I think what you might be getting at is are zero sized arrays OK - herbsutter.com/2009/09/02/when-is-a-zero-length-array-okay
– Jeff Foster
Nov 10 at 12:29
This code can be compiled.
– 張皓雨
Nov 10 at 12:30
@張皓雨 Not with a conforming C++ compiler: “error: zero-size array 'varname'”. It’s allowed as an extension by various compilers but since it’s not covered by the C++ standard we can’t make assertions about its behaviour according to the standard.
– Konrad Rudolph
Nov 10 at 12:31
2
@張皓雨 "This code can be compiled." Nope, it can't be compiled
– πάντα ῥεῖ
Nov 10 at 12:32