Why doesn't rust accept default parameters for functions?

Why does rust not support default arguments? - Reddit

If we could get default function parameters + per-field defaults for structs then I think we could almost all of the benefits of Go-style "just ...

Default function arguments in Rust - Stack Overflow

@puentesdias The accepted answer is still the correct answer. There is no way to do it in Rust, and you have to either write a macro, or use ...

Rust and Default Parameters :: The Coded Message

Rust doesn't support default parameters in function signatures. And ... Let's say you have a function that takes many parameters, perhaps (to take ...

Rust doesn't support default function arguments. Or does it?

This is usually helpful for functions that are widely used from different places and on specific occasions need to behave slightly differently (i.e. in these ...

Default parameter mechanics - tutorials - Rust Users Forum

The key difference here is that if no required parameters are specified, then all the type (and const) parameters -- including defaulted parameters -- are ...

Default and Optional parameter - help - Rust Users Forum

There is no way to specify default parameter values in Rust, but there is an RFC for it. For now you just have to handle this need ad-hoc in whatever way makes ...

How to setup default data if nothing is supplied for a Struct

Rust doesn't have default function arguments. If your type is pure ... Default impl, and allow users to construct instances using FRU syntax.

Optional function arguments - language design - Rust Internals

Some issues in implementing optional arguments have been: Implicitly calling expensive new functions to construct the defaults Calling the right ...

Default function parameters · Issue #381 · godot-rust/gdext - GitHub

Rust doesn't support default params, so there needs to be a way to determine if a default should be used. If the standard Default impl was used, ...

How to use a default value for an optional function parameter that is ...

Changing the signature to accept Path as type would fix it but ... which doesn't work either. Both can be fixed by also moving value ...

Does assigning a function to a variable remove the default value of a ...

Yes, the default is attached to the declaration and gets lost when you convert it to an arbitrary value.

Default parameter mechanics - Learning Rust - GitHub Pages

The first form can resolve to inherent functions or trait methods, whereas the second form can only resolve to the named trait's methods. Rust doesn't have " ...

Default values ..copy that. Making reasonable arguments - Medium

This is because Rust doesn't need language syntax to support default arguments. Instead we can use its existing language features to accomplish ...

Named & Default Arguments - A Review, Proposal and Macro ...

I've written a review of previous RFCs concerning named & default arguments in Rust. It covers a lot of the considerations of such proposals, reviews the ...

Optional parameters in Rust - Vidify

It's the most popular pattern in Rust for optional parameters. · The struct can still be reused in different calls. · No None or Some at sight.

Since we do not have default arguments in Rust, in order to initialize ...

Also, this doesn't help at all for function invocation, which is still very cumbersome in Rust in the absence of default parameters, named ...

Function signatures - PyO3 user guide

... parameters to control how the generated Python function accepts arguments ... default PyO3 accepts all arguments as either positional or keyword arguments.

An approach to resolving some issues with optional arguments

Default arguments have a tendency to lead to functions with a ton of defaulted arguments, and putting them in a struct makes for cleaner ...

Why must required parameters be placed before default parameters ...

If a parameter has a default value, all following parameters up until the “ * ” must also have a default value — this is a syntactic restriction ...

Rust Doesn't Have Named Arguments. So What? - Thoughtbot

So yeah, named args are cool and all, but Rust doesn't have them. How do rustaceans deal with this? Let's consider this example: a function that ...