Stroustrup says in “The C++ Programming Language” (§19.4.4, SE): The idea is that a system may keep a number of fixed-sized buffers ready for fast allocation so that requesting space for n objects may yield space for more than n. It may also yield less, however, so one way of using get_temporary_buffer() is to optimistically … Read more
Only local const references prolong the lifespan. The standard specifies such behavior in §8.5.3/5, [dcl.init.ref], the section on initializers of reference declarations. The reference in your example is bound to the constructor’s argument n, and becomes invalid when the object n is bound to goes out of scope. The lifetime extension is not transitive through … Read more
From this Visual C++ blog article about rvalue references: … C++ doesn’t want you to accidentally modify temporaries, but directly calling a non-const member function on a modifiable rvalue is explicit, so it’s allowed … Basically, you shouldn’t try to modify temporaries for the very reason that they are temporary objects and will die any … Read more
If you are at a certain branch mybranch, just go ahead and git checkout commit_hash. Then you can return to your branch by git checkout mybranch. I had the same game bisecting a bug today 🙂 Also, you should know about git bisect.