I'd like to know if there's a standard way that the compiler interprets
a template argument. That is, let's say you pass a Foo instance as a
template argument to some function. Is the instance itself passed, or
does the compiler assume it's a Foo reference? For example:
=============== =============== ==
template<typena me I> someFunc(I i) { /* ... */ }
Foo f;
someFunc(f);
=============== =============== ===
In someFunc(), does I = Foo, or I = Foo&, or I = const Foo & ?
Thanks,
--Steve
2  1413 
mrstephengross wrote: I'd like to know if there's a standard way that the compiler interprets
a template argument. That is, let's say you pass a Foo instance as a
template argument to some function. Is the instance itself passed, or
does the compiler assume it's a Foo reference? For example:
=============== =============== ==
template<typena me I> someFunc(I i) { /* ... */ }
Foo f;
someFunc(f);
=============== =============== ===
In someFunc(), does I = Foo, or I = Foo&, or I = const Foo & ?
The first. You can make it the second or third by adding those
parameters to your template, e.g.,
template<typena me I> someFunc(I& i) { /* ... */ }
Cheers! --M
Can I also explicitly cast the Foo instance in the someFunc()
invocation?
For example: someFunc(const Foo &)f);
--Steve
This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: Andrew Ward |
last post by:
Hi All,
Considering the following code:
struct A;
struct B
{
std::list<A> l;
};
|
by: vpadial |
last post by:
Hello,
I want to build a library to help exporting c++ functions to a
scripting languagge. The scripting language provides a function to
register functions like:
ANY f0()
ANY f1(ANY)
ANY f2(ANY, ANY)
ANY f3(ANY, ANY, ANY)
|
by: BigMan |
last post by:
Here is a piece of code:
#include <memory>
using namespace std;
template< typename SomeType >
void f(auto_ptr_ref< SomeType >)
{
}
|
by: Bart Samwel |
last post by:
Hi everybody,
I would really like some help explaining this apparent discrepancy,
because I really don't get it. Here is the snippet:
void foo(int&);
void foo(int const&);
template<typename T>
|
by: Fei Liu |
last post by:
#include <vector>
#include <iostream>
template <template <typename T, typename Allocclass C>
struct A{
//C<Tc;
//A(){ c=10; }
void print(){ std::cout << "A" << std::endl; }
};
| | |
by: gretean |
last post by:
I have a problem that's driving me crazy involving Microsoft's ability
to deduce template parameters. I am using Visual Studio .NET (aka
VC7?), and it gives an error compiling the following code.
template <int x, int yclass M {
public:
template <int xRet, int yRet, int xR, int yR>
M<xRet, yRetoperator *(const M<xR, yR&b) const {
M<xRet,yReta;
return a;
|
by: montyshasta |
last post by:
Take this code as a base case, it compiles successfully:
struct R
{
int i;
};
class S : public R
{
void F(void) {i = 0;}
};
|
by: subramanian100in |
last post by:
consider
template<typename TTest
{
// ...
};
We can have a pointer type as argument to a template class. For
example, we can have,
int x = 100;
Test<int*obj(&x); // assuming a suitable ctor exists
|
by: Marco Nef |
last post by:
Hi there
I'm looking for a template class that converts the template argument to a
string, so something like the following should work:
Convert<float>::Get() == "float";
Convert<3>::Get() == "3";
Convert<HelloWorld>::Get() == "HelloWorld";
The reason I need this is that in our design every class of a certain
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
| | |
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
|
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
|
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
| | |
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
| |
