Skip to main content

Questions tagged [recursion]

For questions relating to recursion, or functions that call themselves.

Filter by
Sorted by
Tagged with
16 votes
1 answer
1k views

How can we define a denotational semantics for recursive functions?

Motivation I want to define a denotational semantics (see here or here) for recursive functions in my language, by representing them as mathematical functions. Background Consider a simple language ...
13 votes
1 answer
300 views

Extending Hindley Milner with (mutual) recursion

What's a good approach for extending Hindley Milner with mutual recursion without de-sugaring to let+fix+records? My thinking is (assuming no polymorphic recursion) Collect mutually recursive lets ...
8 votes
1 answer
302 views

Can total (primitive) corecursion be implemented?

I'm trying to understand how to implement corecursion in a total functional context. I've already implemented recursion using standard techniques (for loops) but I ...
12 votes
6 answers
3k views

Early binding, mutual recursion, closures. Can I have all three?

Take this Python snippet of two functions that are mutually recursive and form closures: ...
9 votes
7 answers
2k views

Is there a generic way to refer to the current function in recursion?

In writing recursive functions (functional style), I often need to refer to the current function (depending on the context). e.g. f 0 = 0 f (S n) = f n + 2 Are ...
1 vote
2 answers
1k views

Does x86 assembly support linguistic recursion? [closed]

In my book "Jezici za gimnazijalce" (not available online) and in my Bachelor thesis (which will be online in about a month) I was claiming that assembly languages are like the Piraha ...
7 votes
2 answers
1k views

Dynamic and Static scoping and recursion

So I learned the concept of lexical and dynamic scoping in programming languages. But I am not quite sure about the behaviour of these concepts in recursion(or even not recursion, but two different ...
20 votes
6 answers
3k views

What is the use of explicitly specifying if a function is recursive or not?

In some languages, such as F# and FORTRAN, a keyword is used to specify if a function is recursive or not. What is the use of this, other than telling whoever is using the code that the function is ...
3 votes
1 answer
349 views

X86-64 Assembly for Recursive Functions

A compiler I'm writing generates the following x86-64 assembly (AT&T syntax) for a recursive factorial function. I convert the assembly into an ELF executable using ...
15 votes
3 answers
429 views

What are the trade-offs in supporting Tail Recursion Optimization, but not Tail Call Optimization?

Tail Call Optimization allows a function call as the returned value of a function to be optimized to a goto, preventing the stack from growing. Among other things, ...
8 votes
2 answers
386 views

How to optimize non-tail recursion?

Tail recursion, where a function calls itself as the last step, is straightforward to optimize as to prevent unbounded stack growth: tail call optimization applies. However, this doesn't apply to ...