Questions tagged [static-dispatch]
15 questions
9
votes
3 answers
What is the difference between Binding and Dispatching in Java?
There are too many associated names: Early and Late Binding, Static and Dynamic Dispatch, Runtime vs. Compile-time Polymorphism, etc. that I don't understand the difference.
I found a clear explanation, but is it correct? I'll paraphrase…
Code_Steel
- 437
- 2
- 8
- 14
3
votes
0 answers
How do I validate the results of my visitor(variant) static dispatch versus polymorphic dynamic dispatch benchmark?
I have been trying to measure the performance of a std::variant-based (pseudo-) static dispatch scheme using std::visit.
The idea is that instead of a
struct A {
virtual unsigned f() const noexcept = 0;
virtual ~A() noexcept {}
};
struct B0 :…
bitmask
- 32,434
- 14
- 99
- 159
2
votes
2 answers
what is impl Trait + 'lifetime
I am reading the async book. In section async lifetimes there is a code snippet whose grammar I am not familiar with:
fn foo_expanded<'a>(x: &'a u8) -> impl Future
Steve Lau
- 658
- 7
- 13
2
votes
1 answer
How can I have static dispatch for a linked list containing different types all implementing a trait?
I have this working code:
struct Layer<'a> {
parent: Option>>,
value: Box,
}
I would like to have a version using static dispatch instead:
struct Layer<'a, R: Renderable> {
parent: Option<&'a Layer<'a,…
M. Elkh
- 23
- 4
2
votes
1 answer
Can we use macros to statically dispatch on a return type in Clojure?
Now we know that dispatch on Clojure Protocols, strictly speaking, is dynamic.
We see here a fantastic example of compile-time dispatch using a macro:
(defmacro case+
"Same as case, but evaluates dispatch values, needed for referring to
class…
hawkeye
- 34,745
- 30
- 150
- 304
1
vote
1 answer
How to do static dispatch base on derivation on a template
How can I specialized a template function to return true if objects belong to certain templates/classes and false for other templates/classes
no classes have virtual functions.
I have a template:
template struct…
Daniel Anderson
- 67
- 5
1
vote
0 answers
Implementing Strategy pattern in rust without knowing which strategy are we using at compile time
I've been trying to implement a Strategy pattern in rust, but I'm having trouble understanding how to make it work.
So let's imagine we have a trait Adder and Element:
pub trait Element {
fn to_string(&self) -> String;
}
pub trait Adder {
…
1
vote
0 answers
Override in extension swift - Cannot or Should Not?
Below is my code snippet?
extension UISwitch{
open override func draw(_ rect: CGRect) {
self.tintColor = UIColor.red
}
}
As per apple documentation, you should not override in extension. I understand this. Now I am not getting an…
Tushar Limaye
- 106
- 2
- 7
0
votes
0 answers
Calling enum_dispatch'd instances of structs from main, outside of crate or file
If run without changes, test_method() is called correctly for both variants in the function get_test_vector():
//! handler.rs
use enum_dispatch::enum_dispatch;
#[enum_dispatch]
trait CommonTrait {
fn test_method(&self)…
TheAlmightyD
- 31
- 3
0
votes
1 answer
When is it appropriate to implement Send + Sync for static dispatch
I find myself playing around with warp.
I would like to pass a database Trait to a warp::Filter using static dispatch, such that the concrete database may vary.
I read that Send + Sync are unsafe to implement, but I don't fully understand when it is…
kruserr
- 463
- 4
- 8
0
votes
0 answers
Can struct type be static dispatch in swift?
I think that I almost understand what will be static or dynamic dispatch.
As far as I know, struct instance with struct type will be always static dispatch.
struct A {
func yo() {
print("A")
}
}
var a: A = A()
a.yo()
But, struct…
HyunSu
- 155
- 7
0
votes
1 answer
Do Rust traits have runtime overhead?
Is there any runtime overhead if I create c1 of type Concrete1 in the code below?
pub trait ExampleTrait {
fn foo(&self);
}
pub struct Concrete1 {}
impl ExampleTrait for Concrete1 {
fn foo(&self) {}
}
pub struct Concrete2 {}
impl…
user855
- 19,048
- 38
- 98
- 162
0
votes
1 answer
C++ Static Polymorphism––Referencing Specialized Template Methods Overloaded In Derived Class From Base Class Pointer
I am implementing a variation of the observer pattern in C++. However, because of the nature of the nature of my project, it CANNOT USE ANY VIRTUAL MEMBER FUNCTIONS, as the aggregate overhead from vtable lookups and cache misses is…
photon19
- 9
- 1
0
votes
1 answer
Will increasing the use of dynamic dispatch reduce compile time?
In swift the compilation time is really slow the amount of code in your project increases. So i was looking for ways to reduce that time. One approach maybe is to use language keywords like final or static to change the way the compiler handles the…
Mariano
- 79
- 6
-3
votes
2 answers
How to create a factory method based on static dispatch?
I want to study design pattern use rust language. From this code it works properly but it uses dynamic dispatch. How can I change the code to use static dispatch? Thanks!
trait Shape {
fn draw(&self);
}
enum ShapeType {
Rectangle,
…
minikiller
- 1
- 2