Questions tagged [const-method]
23 questions
1
vote
0 answers
c++ const member function that accepts modification of specified member variable (relaxed const)
I have the following class Sample. Say, I wanna perform some heavy computation using member variable var and cache the result in case I will do the same computation again. I also guarantee that non-cached variable var be const, and if not, I wanna…
orematasaburo
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vote
2 answers
Might this cause an infinite loop?
For defining a second const version of a function, is it guaranteed safe to do this? It looks like it would have infinite recursion as I want to return const but the other function which I mean to call is non-const.
It works with g++ but I worry…
Zhro
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0
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Error passing reference const to function getting: the object has type qualifiers that are not compatible with the member function
I have this simple function :
DBConfig::DBConfig(const IniParser& ini)
{
m_url = ini.GetValue("host");
m_user = ini.GetValue("db_user");
m_pass = ini.GetValue("db_pass");
m_schemaName = ini.GetValue("db_schema");
}
which i…
user63898
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1 answer
reinterpret_cast casts away const qualifier?
In the following case I try to cast a pointer to a struct into a pointer to another struct (which has the same memory layout behind the scenes). I try to do this in a const correct way, however the compiler is complaining.
I looked at a similar…
glades
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1 answer
changing a value of a class pointer in const Class function gives an error in some compiler but not others
I have below code and It gives an error as "segmentation fault" in some compiler but for other compilers it gives "40" as output. Why is there difference?
#include
class A{
int *ptr;
public:
void set(int val) const;
};
void…
Selcuk
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0
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0 answers
Xcode not recognising const method as const
I have a simple fraction class that I'm working on and I've been overloading various operators and they all work apart from my division operator. For some reason even though it's marked as a const method like all the other operators that return a…
Joshua Williams
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1 answer
I can't call constructor of inner class with this pointer of outer class
I don't know why below code failed to compile with error:
"no instance of constructor "cb::iterator::iterator" matches the
argument list argument types are:(int, const cb)"
But the code compiles fine when i uncomment the second version of…
Islam Abdeen
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0
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5 answers
Why is std::basic_string::operator[] a const method if it's also a non-const method?
http://cplusplus.com/reference/string/basic_string/operator[]
I understand that it's advantageous to have a second version which returns const to prevent warnings when a const result is required and to mitigate casting but if the function already…
Zhro
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