Const

Friday, April 07, 2006 - 5 Posts by 3 People

Hi, Code: Select all // vector add const CVector operator+(const CVector &vec) const { return CVector(x + vec.x, y + vec.y, z + vec.z); } could someone please explain what each of the three consts 1st const: The object-result of overloaded operator has const attribute. That is, it cannot

Friday, January 02, 2009 - 11 Posts by 11 People

Hi, I need to call a const function from a non-const object. See example struct IProcess { virtual bool doSomeWork() const = 0L; }; class Foo : public IProcess { virtual bool doSomeWork() const You don't have to do any casting trickery if the function is not overloaded. Calling a const method

Sunday, April 19, 2009 - 3 Posts by 3 People

I have code like this: NSData *data = [NSData dataWithContentsOfURL:objURL]; const void *buffer like: - (void)_loadData:(const char *)data; How do I convert "const void " to a "const char Just like you would in C: [self _loadData:(const char *)buffer]; should work. You mustn't release

Sunday, April 19, 2009 - 11 Posts by 11 People

As an extension to this question Are const_iterators faster? , I have another question on const _iterators . How to remove constness of a const_iterator ? Though iterators are generalised form You can subtract the begin() iterator from the const_iterator to obtain the position the const

Wednesday, August 26, 2009 - 13 Posts by 13 People

While striving for const-correctness, I often find myself writing code such as this class Bar ; class Foo { public: const Bar* bar() const { /* code that gets a Bar somewhere */ } Bar* bar() { return You can do something like this: class Bar; class Foo { public: const Bar* bar() const { return

Friday, July 31, 2009 - 6 Posts by 6 People

The lack of const identifiers (I forgot them, but now I want to know why this won't work). I am trying to get this to compile: Node(Node const& other) : prev_(other.prev()), value_(other.value You're not trying to do a non-const to const conversion. You're attempting to call two methods

Wednesday, May 13, 2009 - 8 Posts by 8 People

Non-trivial chunk of code... return something; } const Something& getSomething(int index) const with the other one, because you can't call the non-const version from the const version (compiler I would cast the const to the non-const (second option). Try to eliminate the getters

Monday, October 26, 2009 - 6 Posts by 6 People

Is there a difference in the order of the comparison operator? #define CONST_VALUE 5 int variable ; ... if ( variable == CONST_VALUE ) // Method 1 ... OR if ( CONST_VALUE == variable ) // Method 2 , static analysis of the code). The only difference is that ( CONST_VALUE == variable ) makes the common

Thursday, May 11, 2006 - 3 Posts

I'm a little confused. I have a class function declared like: const CItem& operator << (const ,...,0,0,20,0,0,20,eol"; At the end of the method it does: return *this; My question is, is my const on the return... ; > const CItem& operator << (const std::string &sIn); > > Which I use like this: >

Sunday, January 04, 2009 - 4 Posts by 4 People

I am trying to do the following in a way or another: const char EscapeChar = '\\'; const string it to be a const instead of static readonly ? The latter will have almost the same semantics. The only ways I can think of (both not ideal) are: const string EscapeString = "\\"; private static readonly