Vlang modules

[1325500477]

V是如何搜索其它模块文件的请帮忙能仔细说明，按照官方文档和中文文档介绍的在一级目录下没有问题例如：
hello /
hello.v
module hello
src/
main.v
import hello
v run .
但是在二级目录会报错
mod /
hello /
hello.v
module hello
src/
main.v
import hello
v run .
查看examples里面的例子及测试发现一级目录的名字一定是modules才不会报错
modules /
hello /
hello.v
module hello
src/
main.v
import hello
v run.
而且我进入官方提供的example/submodule里面build也会报错
example/
submodule
v run .
报错如下：
v/examples/submodule# v run .
main.v:1:1: builder error: bad module definition: ./v imports module "mymodules" but /home/jim/vlang/v/examples/submodule/mymodules/main_functions.v is defined as module mymodule
1 | import mymodules { add_xy }
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 | import mymodules.submodule { sub_xy }

[JalonSolov]

You have module mymodule in the file, but have import mymodules { add_xy } (note the s at the end of mymodules. Those names need to match exactly.

[1325500477]

由于翻译软件的问题我大概理解说的意思，我也看出来mymodule少了一个‘s’,可能是官方例子没有维护好，我的测试文件模块名是完全匹配的
另外我的问题：模块文件之前是如何查找的？
请帮忙帮忙详细解释

[1325500477]

test/
mod / hello.v
src / main.v
`
//test/mod/hello.v
module hello

pub fn hello_world() {
println('hello world')
}
//test/src/main.v
module main
import hello

fn main() {
hello.hello_world()
}
`
vlang/test# v run .
src/main.v:2:1: builder error: cannot import module "hello" (not found)
1 | module main
2 | import hello

test/
modules/ hello.v
src / main.v
`
//test/modules/hello.v
module hello

pub fn hello_world() {
println('hello world')
}
//test/src/main.v
module main
import hello

fn main() {
hello.hello_world()
}

`
vlang/test# v run .
hello world

[JalonSolov]

V expects modules to be in a subdirectory which is named the same as the module name. All files in the subdirectory should have module <the module name> as the first line in the file.

Also, put a file named v.mod in the root directory of your project. V uses this as the anchor point to look up your local modules.

Documentation on modules for V is here: https://github.com/vlang/v/blob/master/doc/docs.md#modules

[1325500477]

我的root directory有v.mod
我也看过文档中关于module的描述，但是过于简单，没有找到答案
mod /
a/a.v
b/b.v
.......
src/mian.v
这样如何实现？，因为这样看起来比较整洁

   a/a.v
   b/b.v
   .......
   src/mian.v

这样看起来有点乱

[JalonSolov]

Use modules instead of mod and add v.mod, and it works correctly.

.
├── modules
│   ├── a
│   │   └── a.v
│   └── b
│       └── b.v
├── src
│   └── mian.v
└── v.mod

modules/a/a.v:

module a

pub fn a() {
        println('a')
}

modules/b/b.v

module b

pub fn b() {
        println('b')
}

src/mian.v

import a
import b

fn main() {
        a.a()
        b.b()
}

v.mod is an empty file.

Running this code:

$ v run .
a
b
$

[1325500477]

文档没有说明要使用modules作为目录名，而且固定为modules不合理吧？

[JalonSolov]

"Unreasonable" is an objective statement. It is what was implemented originally, and was actually going to be removed at one point. It simply still works. At least for now.

[JalonSolov]

Personally, I am fine with just

.
├── a
│   └── a.v
└── b
│   └── b.v
└── mian.v
└── v.mod

It looks simpler, and works the same as having the modules and src subdirectories.

[1325500477]

希望以后能把工程路径做的更人性化，根据需求任意设置路径

[1325500477]

@JalonSolov 非常感谢你的耐心回复

[JalonSolov]

Welcome. :-)

[getfile]

关于模块文件的搜索, 这里有个比较详细的文章 https://lydiandylin.gitbook.io/vlang/mu-lu/module#mo-kuai-sou-suo-lu-jing

[1325500477]

竟然比官方文档写的更加详细，谢谢