oxfeeefeee / goscript Goto Github PK

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The Dot import syntax brings the entire package into the current namespace. So, you don’t have to call the functions using the package name. You can directly call them.

Reproduction code

package main

import (
  . "fmt2"
)

func main() {
  Println("Hello, World!")
}

Expected Results

That it would print out "Hello, World!"

Actual Results

thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', ...goscript/codegen/src/package.rs:47:60

Hello! Wonderful project. I was playing around with embedded structs as they're a golang feature I quite like, and I found that fields and methods aren't promoted in goscript like they are in golang proper:

package main

import (
	"fmt"
)

type Base struct {
	name string
}
func (b Base) PrintField() {
	fmt.Println(b.name)
}

type Container struct {
	Base
}

func main() {
	t := Container{Base{"go"}}
        //t.PrintField() //error in goscript, but works in golang
	t.Base.PrintField() //have to use this instead
}

I'm not sure if this is an issue with the go specs, or simply this implementation. I'm not even sure if implementing field promotion is on the table. But I felt it was worth bringing up anyway.
The error specifically when trying to run this script is:
thread 'main' panicked at 'no entry found for key', ...\vm\src\metadata.rs:493:9
so it seems to be an error with field name resolution.

The Chinese character "非" (non-) has to be added directly to "官方" (official) to mean "non-official," so it shoud be "Go语言规范的非官方实现" instead of "Go语言规范非的官方实现."

I don't know if this was intentional, but on the registered-based branch, creating a map was possible from ffi.

How do I do this while using the master branch? The new_map function is only available within goscript crate.

How do I convert this MapObj to a GosValue?

I am working from the register-based library, because that is where I have managed to use the FFI API extensively. But I am having a type conversion problem

I have this go script file

package main

import (
	"zflow"
	"fmt2"
)

var in = zflow.Inputs()  // this returns map[string]interface{} type

func main() {
	fmt2.Println(in) // this prints map[left:1 right:2]
	// get inputs
	data, ok := in.(map[string]interface{})
	fmt2.Println(ok) // this prints false
	fmt2.Println(data) // this prints <nil(map)>
	
	left := data["left"]
	fmt2.Println(left) // this prints <nil>
  
}

Output:

map[right:2 left:1]
false
<nil(map)>
<nil>

Expected output
https://go.dev/play/p/qPNzh1RmyiQ

map[left:1 right:2]
true
map[left:1 right:2]
2

How do I correctly read a map value that is sent into the runtime via FFI function call?

Is there a reason why ffi is not public?

This section of the code loops infinitely with input `.

#[test]
fn test() {
    let mut fs = fe::FileSet::new();
    let o = &mut fe::objects::Objects::new();
    let el = &mut fe::errors::ErrorList::new();
    parse_file(o, &mut fs, el, "/a", "`", false);
}

Unwrapping b.as_ref() is not guaranteed, and fails sometimes when you pass an interface{} value into an ffi function.

I wonder what the general behavior would be if you applied this as a fix

let want_meta = want_meta.as_metadata();
if b.is_none() {
   return Ok((want_meta.zero(metas, gcc), false));
}
let meta = b.as_ref().unwrap().0;

Sample:

package main

func broken(elems ...int) {}

func main() {
  broken()
}

thread 'test_std_temp' panicked at 'index out of bounds: the len is 0 but the index is 0', codegen/src/codegen.rs:965:32

This is a pretty amazing project, thanks for putting it out there :)

• Is it a bug that the memory addresses printed by the code in the above image are different?