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Operators in C++ what does (::Type*)0 mean
What is the meaning of prepended double colon “::”?What are the differences between a pointer variable and a reference variable in C++?What does the explicit keyword mean?What are POD types in C++?The Definitive C++ Book Guide and ListWhat is the effect of extern “C” in C++?What is the “-->” operator in C++?What is move semantics?What is The Rule of Three?What are the basic rules and idioms for operator overloading?C++11 introduced a standardized memory model. What does it mean? And how is it going to affect C++ programming?
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Can anyone tell me what this means?
(::Type*)0
actually it is part of this
return (is_modifytype()) ?
u.myfunction : (::Type*)0;
c++
asked 8 hours ago
Billal OualiBillal Ouali
403
add a comment |
Can anyone tell me what this means?
(::Type*)0
actually it is part of this
return (is_modifytype()) ?
u.myfunction : (::Type*)0;
c++
asked 8 hours ago
Billal OualiBillal Ouali
403
21
It means that this is old code that should be rewritten to usenullptr.
– Sam Varshavchik
8 hours ago
add a comment |
Can anyone tell me what this means?
(::Type*)0
actually it is part of this
return (is_modifytype()) ?
u.myfunction : (::Type*)0;
c++
asked 8 hours ago
Billal OualiBillal Ouali
403
Can anyone tell me what this means?
(::Type*)0
actually it is part of this
return (is_modifytype()) ?
u.myfunction : (::Type*)0;
c++
c++
asked 8 hours ago
Billal OualiBillal Ouali
403
asked 8 hours ago
Billal OualiBillal Ouali
403
edited 5 hours ago
Billal Ouali
asked 8 hours ago
Billal OualiBillal Ouali
403
asked 8 hours ago
Billal OualiBillal Ouali
403
asked 8 hours ago
Billal OualiBillal Ouali
403
403
21
It means that this is old code that should be rewritten to usenullptr.
– Sam Varshavchik
8 hours ago
add a comment |
21
It means that this is old code that should be rewritten to usenullptr.
– Sam Varshavchik
8 hours ago
21
21
It means that this is old code that should be rewritten to use
nullptr.– Sam Varshavchik
8 hours ago
It means that this is old code that should be rewritten to use
nullptr.– Sam Varshavchik
8 hours ago
add a comment |
1 Answer
1
active
oldest
votes
It means "cast the integer 0 (using a C-style cast) to the type Trip* (Trip pointer) found in the global namespace (::)".
It should just use nullptr - as in
return is_modifyCurrentTrip() ?
u.modifyCurrentTrip : nullptr;
Note: using :: explicitly to designate the global namespace prevents the compiler from prepending any namespace names itself - this is completely irrelevant when just using nullptr though.
answered 8 hours ago
Jesper JuhlJesper Juhl
18.8k32751
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
It means "cast the integer 0 (using a C-style cast) to the type Trip* (Trip pointer) found in the global namespace (::)".
It should just use nullptr - as in
return is_modifyCurrentTrip() ?
u.modifyCurrentTrip : nullptr;
Note: using :: explicitly to designate the global namespace prevents the compiler from prepending any namespace names itself - this is completely irrelevant when just using nullptr though.
answered 8 hours ago
Jesper JuhlJesper Juhl
18.8k32751
add a comment |
It means "cast the integer 0 (using a C-style cast) to the type Trip* (Trip pointer) found in the global namespace (::)".
It should just use nullptr - as in
return is_modifyCurrentTrip() ?
u.modifyCurrentTrip : nullptr;
Note: using :: explicitly to designate the global namespace prevents the compiler from prepending any namespace names itself - this is completely irrelevant when just using nullptr though.
answered 8 hours ago
Jesper JuhlJesper Juhl
18.8k32751
add a comment |
It means "cast the integer 0 (using a C-style cast) to the type Trip* (Trip pointer) found in the global namespace (::)".
It should just use nullptr - as in
return is_modifyCurrentTrip() ?
u.modifyCurrentTrip : nullptr;
Note: using :: explicitly to designate the global namespace prevents the compiler from prepending any namespace names itself - this is completely irrelevant when just using nullptr though.
answered 8 hours ago
Jesper JuhlJesper Juhl
18.8k32751
It means "cast the integer 0 (using a C-style cast) to the type Trip* (Trip pointer) found in the global namespace (::)".
It should just use nullptr - as in
return is_modifyCurrentTrip() ?
u.modifyCurrentTrip : nullptr;
Note: using :: explicitly to designate the global namespace prevents the compiler from prepending any namespace names itself - this is completely irrelevant when just using nullptr though.
answered 8 hours ago
Jesper JuhlJesper Juhl
18.8k32751
edited 7 hours ago
answered 8 hours ago
Jesper JuhlJesper Juhl
18.8k32751
answered 8 hours ago
Jesper JuhlJesper Juhl
18.8k32751
answered 8 hours ago
Jesper JuhlJesper Juhl
18.8k32751
18.8k32751
add a comment |
add a comment |
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21
It means that this is old code that should be rewritten to use
nullptr.– Sam Varshavchik
8 hours ago