safe-builder | 👷 safe derive builder implementation for rust structs
kandi X-RAY | safe-builder Summary
kandi X-RAY | safe-builder Summary
safe derive builder implementation for rust structs
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safe-builder Key Features
safe-builder Examples and Code Snippets
Lines of Code : 15
License : No License
Copyuse safe_builder::*;
#[derive(Builder)]
pub struct User {
id: String,
name: String,
addr: Option,
}
fn main() {
let me = User::builder()
.id("1234".to_owned())
.name("bokuweb".to_owned())
.build();
}
Community Discussions
Trending Discussions on safe-builder
QUESTION
I've seen lots of tutorials but still didn't get exactly how it works. I understood the main idea: a function holding functions with data, but looking official documentation I couldn't realize how and where the data is stored and who calls the function responsible for its storaging. Other tutorials seems to show just a snippet of code, which didn't help me much. Can you give me a full and simple example with a trivial class, like a person, please?
...ANSWER
Answered 2018-Apr-11 at 18:17I was interested in some details, too. Here's what I wrote:
QUESTION
In Scala - we can do extension methods like this:
...ANSWER
Answered 2017-Jul-24 at 13:51These are three completely separate concepts that do different things.
An extension method allows you to add a method to a class that already exists. This can lead to a nicer API than creating a method that takes in an object of that class as a parameter.
The builder pattern allows you to construct an object with many options and parameters by setting these parameters in a mutable object first, then calling a "build" method to initialize your (typically immutable) object you are creating. This helpful because it removes the need to a huge constructor with many arguments and is especially useful when some of those arguments are optional with defaults.
A fluent API means that "setter" methods will return the object itself instead of returning Unit/void. This allows for an API where you can chain method calls together. for example using a fictional Point2d class
QUESTION
I'm pretty new to Kotlin, and I've come across both of these representations:
...ANSWER
Answered 2017-Jun-23 at 06:34The second snippet is an example of how you could build a DSL for your domain. For simple cases like this, it is a bit overkill to create a DSL, but when your objects get larger it might be cleaner to design a DSL.
In fact, using the DSL style to create simple instances might even be confusing.
For example, the documentation on DSLs shows the following code:
QUESTION
I'm going to use the official example from the documentation that implements a DSL for some HTML creation.
Since Kotlin 1.1, the @DslMarker annotation allows us to restrict the scope of the functions in our classes, like the example does with the @HtmlTagMarker annotation. This gives us an error when trying to write incorrectly structured code like this:
ANSWER
Answered 2017-Apr-18 at 10:59Probably this can somehow be done in a more elegant way, but I can suggest using the @Deprecated annotation with DeprecationLevel.ERROR on a function with a matching signature defined for the receiver type, for example:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install safe-builder
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
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