In C++ specifies constructors and conversion operators that don't allow implicit conversions or copy-initialization. In C# declares a user-defined type conversion operator that must be invoked with a cast. For MS SQL Server for-xml-EXPLICIT mode use the [for-xml-explicit] tag
Questions tagged [explicit]
405 questions
4
votes
1 answer
c++ cli interface event explicit implementation
I am trying to convert c# code into c++/cli. Everything went smoothly until i started translating interface event explicit implementations into c++/cli syntax.
Let's say in c# i have this interface
public interface Interface
{
public event…
edwabr123
- 97
- 9
4
votes
2 answers
C++ Explicit Constructor
I have a class with 2 constructors.
explicit MyClass(size_t num);
template MyClass(T myObj);
And I want that whenever I make
MyClass obj( 30 );
The first constructor will be called,
And on implicit constructors and
MyClass obj =…
Taru
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4
votes
2 answers
Implicit conversons in Scala and C#
Implicit conversions seem to be a major and controversial feature of Scala, while they seem to have far less prominence in C#. What's the difference between them in the two languages? Is there anywhere I'm forced to use implicits in Scala, or can I…
Rich Oliver
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3
votes
2 answers
How do I explicitly refer to this template member?
Template members may be implicitly referred to if they are the only member of a template, and if they share the template's name:
template foo(int number)
{
immutable int foo = number;
}
void main()
{
writeln(foo!(123)); // Okay.
}
But what…
Maxpm
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3
votes
1 answer
Explicit template specialization
I hate to ask such a general question, but the following code is a exercise in explicit template specialization. I keep getting the error:
c:\users\***\documents\visual studio 2010\projects\template array\template array\array.h(49): error C2910:…
David
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3
votes
1 answer
Why is gnu make ignoring my explicit pattern rule and using a built-in implicit rule instead?
My makefile has this rule/recipe:
%o: %cpp Makefile
g++ -Wall -Wextra -MMD -MP -O2 -c -o $@ $<
This worked fine until I upgraded Cygwin recently and got Make 3.82.90 (previous version was probably 3.81).
Now with make 3.82, it ignores my rule…
Dan
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3
votes
5 answers
Can I rename an implemented method in Java?
I have a class which is implementing an interface, and one of the methods is called onClick. Is there a way to implement the onClick that the interface wants but name it something else? Something like (and I'm making this up):
public void…
Mendhak
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3
votes
1 answer
Why here template Vector3 cannot convert to Vector3?
It seems quite weird. Here you can see the error message is that a convert happens between one type and it fails. If I remove the explicit modifier from Vector3's copy constructor it is fine, no error. Could someone explain why? I'm…
Young_cun_yi_ba
- 57
- 2
3
votes
2 answers
C++ use of explicit suggested by cppcheck
Is using the cast constructor bad?
Otherweise why a code quality checker (cppcheck in my case) would constantly suggest to add explicit before single parameter constructors?
What if I want to do
class MyClass {
A(int) {}
};
A a = 1;
If I follow…
DDS
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3
votes
2 answers
Why doesn't the `explicit` keyword prevent a `char` from being converted into an `int`?
From what I understand, in the following code, explicit A(int a) should prevent A b('g'); to use the int constructor:
#include
class A
{
public:
int x;
char *y;
A() : x(0) {}
explicit A(int a) : x(a)…
H-005
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3
votes
2 answers
What actually happens when copy initializing in C++?
Consider the following code:
#include
using namespace std;
class A{
public:
A()=default;
A(int a){cout<<"A(int) called"<
sakugawa
- 117
- 5
3
votes
4 answers
My explicit instantiation of template class seems doesn't work
I wrote a short program to test the template class's explicit instantiation as follows:
#include
template
struct less_than_comparable {
friend bool operator>=(T const& a, T const& b) {
return !(a < b);
…
Brooks Xi
- 33
- 3
3
votes
1 answer
Explicitly assign any type in typescript
Currently we are migrating our codebase to typescript and we have many places with any type. So I am trying to enforce explicit setting variables as any.
Here is example snippet.
const a: string = 'h';
const b: any = 4;
const message = a || b;
//…
Gytis Vinclovas
- 33
- 2
3
votes
1 answer
Behavior when both conversion constructor and operator are present and explicitness is involved
I have a piece of code where I have both conversion constructor and conversion operator.
#include
struct ClassFloat;
struct ClassInt{
int value;
ClassInt(int c) : value(c){std::cout << "From integer\n";};
ClassInt(ClassFloat…
jannarc
- 93
- 2
- 8
3
votes
1 answer
How can I apply make a default constructor conditionally explicit?
Problem
Suppose we have a (fictional) class template C with a conditionally explicit default constructor. The default constructor should be explicit if and only if std::is_same_v.
A search on "[c++] conditionally explicit" returns this…
L. F.
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