Like C, C++ doesn’t define layouts, just semantic constraints that
must be met. Therefore different implementations do things differently.
One good explanation is in a book that is otherwise outdated and doesn’t
describe any current C++ implementation: The Annotated C++ Reference Manual (usually called the ARM). It has diagrams of key layout examples. There is a very brief explanation in Chapter 2 of TC++PL3.
Basically, C++ constructs objects simply by concatenating sub objects. Thus
is represented by two
int
s next to each other, and
is represented by an
A
followed by an int
; that is, by three int
s next to each other.
Virtual functions are typically implemented by adding a pointer (the
“vptr”) to each object of a class with virtual functions. This pointer
points to the appropriate table of functions (the “vtbl”). Each class
has its own vtbl shared by all objects of that class.
I discovered your blog site on google and verify a few of your early posts. Continue to maintain up the superb operate. I simply extra up your RSS feed to my MSN News Reader. Looking for forward to reading extra from you in a while!… free C++ Courses
ReplyDeleteThis is a really good read for me interesting and very informative. I appreciate you work.
ReplyDeleteRelated site
Hi, extremely interesting article. My sister and I have been recently looking to find comprehensive info on this subject kind of stuff for a short time, but we didn’t until now. Do you think you can also make some youtube videos about this, I believe your website will be far more detailed in case you did. In any other case, oh well. I will be checking out on this website in the forseeable future. Email me to keep me up to date. granite countertops cleveland Best assignment provider near by me
ReplyDeleteyou will need support or suggestions, write me privately.
ReplyDeleteI interested in your implementation/use case.
the best kera4d
Togel2win