20 lines
454 B
Markdown
20 lines
454 B
Markdown
|
+++
|
||
|
|
title = 2024-05-19
|
||
|
|
author = ["SouthFox"]
|
||
|
|
date = 2024-05-19T23:43:00+08:00
|
||
|
|
lastmod = 2024-05-19T23:59:42+08:00
|
||
|
|
tags = ["publish"]
|
||
|
|
draft = false
|
||
|
|
+++
|
||
|
|
|
||
|
|
## Scheme 数据类型 {#scheme-数据类型}
|
||
|
|
|
||
|
|
在 [Scheme]({{< relref "../main/20240519235937-scheme.md" >}}) 里定义一个数据类型，声明它的构造函数……参数，以及判断方法，还有 set 方法
|
||
|
|
|
||
|
|
```scheme
|
||
|
|
(define-record-type <vec2>
|
||
|
|
(make-vec2 bv)
|
||
|
|
vec2?
|
||
|
|
(bv vec2-bv))
|
||
|
|
```
|