algorithm - What is tail recursion? - Stack Overflow
Aug 29, 2008 · In short, a tail recursion has the recursive call as the last statement in the function so that it doesn't have to wait for the recursive call. So this is a tail recursion i.e. N(x - 1, p * x) is the last statement in the function where the compiler is clever to figure out that it can be optimised to a for-loop (factorial).
What is tail recursion? - Computer Science Stack Exchange
Tail-recursion is a form of recursion in which the recursive calls are the last instructions in the function (that's where the tail part comes from). Moreover, the recursive call must not be composed with references to memory cells storing previous values (references other than the parameters of the function).
algorithm - What is tail call optimization? - Stack Overflow
Mar 21, 2012 · And on tail recursion: Tail recursion happens if a function, as its last operation, returns the result of calling itself. Tail recursion is easier to deal with because rather than having to jump to the beginning of some random function somewhere, you just do a goto back to the beginning of yourself, which is a darned simple thing to do.
Which, if any, C++ compilers do tail-recursion optimization?
Strange. I just tested gcc 4.2.3 (x86, Slackware 12.1) and gcc 4.6.2 (AMD64, Debian wheezy) and with -O1 there is no inlining and no tail-recursion optimization. You have to use -O2 for that (well, in 4.2.x, which is rather ancient now, it still won't be inlined). BTW It's also worth to add that gcc can optimize recursion even when it is not ...
Tail recursion in C++ - Stack Overflow
Apr 23, 2010 · Tail recursion (and tail calling in general) requires clearing the caller's stack frame before executing the tail call. To the programmer, tail recursion is similar to a loop, with return reduced to working like goto first_line;. The compiler needs to detect what you are doing, though, and if it doesn't, there will still be an additional stack ...
Why doesn't .NET/C# optimize for tail-call recursion?
Jan 29, 2009 · 2) There are few real C# methods where it would be legal to emit tail calls (other languages encourage coding patterns which have more tail recursion, and many that rely heavily on tail call optimization actually do global re-writing (such as Continuation Passing transformations) to increase the amount of tail recursion).
recursion - Tail recursive functions in Scheme - Stack Overflow
For a function to be tail recursive, there must be nothing to do after the function returns except return its value. That is, the last thing that happens in the recursive step is the call to the function itself.
algorithm - Convert recursion to tail recursion - Stack Overflow
Mar 21, 2013 · Very nice answer! I think the Fibonacci "double recursion" can be turned into pure tail-recursion because this particular problem can be solved in O(1)-space using an iterative solution, but (correct me if I'm wrong) not all problems that look similar to the initial Fibonacci recursion can be converted to pure tail-recursion in the same way -- e.g. summing the leaves of a binary tree genuinely ...
When is tail recursion guaranteed in Rust? - Stack Overflow
Dec 9, 2019 · Neither tail recursion (reusing a stack frame for a tail call to the same function) nor tail call optimization (reusing the stack frame for a tail call to any function) are ever guaranteed by Rust, although the optimizer may choose to perform …
Tail Recursion in java - Stack Overflow
Jul 22, 2012 · @A.H.: the fact that the last statement is a recursive call doesn't make tail recursion so important (for the same reason we are not teaching about head recursion) - it's the fact that it can be optimized to simple loop. Showing an example of tail recursion on a language that does not support it is misleading - it won't buy you anything in Java.