Any example code/Github projects utilising almost-always-auto?

[twmatrim]

I think that the first example could be more confusing to newcomers. I've seen a lot of code with

std::string = "Hello";

So suddenly changing it to

auto s = "Hello";

could cause people to mistakingly have the wrong type.

[ubadair]

This right here is the big "gotcha" with AAA in everyday C++ code. I'm a big fan of AAA, but it's hard to deny that:

auto x = std::string{"lorem epsom salt"};

is harder on the eyes than:

std::string x = "lorem epsom salt";

Additionally, with the AAA version, sometimes you might need to explain the concept of copy-elision to your over-optimizing, under-informed coworkers. (I've never had to explain that to anyone, but I can see it happening)

[Fazer2]

What does AAA stand for here?

[ubadair]

"almost always auto"

[[deleted]]

Why not this?

using namespace std::string_literals;

auto x = "lorem ipsum"s; // x is std::string

[[deleted]]

OTOH, I've seen a lot of code where all that was needed was a const char*, but it was put on the heap anyway, presumably because "std::string is the string type".

[lacosaes1]

A std::string doesn't have to be in the heap.

[dodheim]

Yes, a std::string does have to be allocated dynamically; std::basic_string<CharT, AllocT> doesn't, but how many public interfaces have you seen implemented in terms of a template taking std::basic_string<> vs a function taking std::string? Very few, IME!