
What is the difference between 'typedef' and 'using'?
Updating the using keyword was specifically for templates, and (as was pointed out in the accepted answer) when you are working with non-templates using and typedef are mechanically identical, so …
What is the logic behind the "using" keyword in C++?
Dec 27, 2013 · 182 In C++11, the using keyword when used for type alias is identical to typedef. 7.1.3.2 A typedef-name can also be introduced by an alias-declaration. The identifier following the using …
What's the scope of the "using" declaration in C++?
Oct 22, 2008 · But if you put the using declaration inside a namespace it's limited to the scope of that namespace, so is generally OK (with the usual caveats on your particular needs and style).
What's the problem with "using namespace std;"?
The problem with putting using namespace in the header files of your classes is that it forces anyone who wants to use your classes (by including your header files) to also be 'using' (i.e. seeing …
grammar - 'I was using', 'I have used', 'I have been using', 'I had ...
Oct 21, 2010 · I had been using cocaine. Meaning, with a reference point in the past, starting a time before then up to the reference point, I was habitually using cocaine up to and including that point. …
MySQL JOIN ON vs USING? - Stack Overflow
Feb 19, 2021 · Extremely good point. Of all the advantages using provides, it can't be combined with other predicates: select*from t join t2 using(i) and on 1 wouldnt work.
How does `USING` keyword work in PostgreSQL? - Stack Overflow
Jan 29, 2024 · A USING clause can be used with an EXECUTE statement in PL/pgSQL language (LANGUAGE plpgsql) for a function, procedure and DO statement. For example, you can use a …
What scope does a using statement have without curly braces
Jul 18, 2014 · So if you are using using var resp = req.GetResponse() inside of the root block of a method, then the using variable will have method scope, actually similar to the defer statement in go.
What is the use of "using namespace std"? [duplicate]
Sep 20, 2013 · E.g. if you add using namespace std; you can write just cout instead of std::cout when calling the operator cout defined in the namespace std. This is somewhat dangerous because …
c++ - Using std Namespace - Stack Overflow
There seem to be different views on using 'using' with respect to the std namespace. Some say use ' using namespace std', other say don't but rather prefix std functions that are to be used with '...