SyntaxError: Illegal break statement

[Jennal]

I try my code here:https://raw.githubusercontent.com/Jennal/LuaUtils/master/src/Oop.lua
Click Compile & Run, get the SyntaxError: Illegal break statement
Can you fix this?

[tdzl2003]

This is a hard work now, cause currently I use function to make variables in correct block.

You can try #4 at luajs.org, compile can give result, but break will be in a function:

    do 
    {
        l.__call(l._f(function()
        {
            var a$2 = 1;
            b$1 = l.__add(b$1,1);
            if ((l.__eq(b$1,3)))
            {
                break;
            }
        }),[]);
    }while (!(l.__eq(l.__get(_ENV,"a"),1)));

This is why thing happens.

I think it would be a simple way to target to ES2015(use let instead of var), and use babel to transform it into ES5 version.

Or we can just learn the way babel do with let, and rewrite it in luajs.

I wrote lua.js in old days(2 years ago). I learned much in these 2 years. I think maybe I should rewrite it in modern ways(commonJS, webpack, ES6, etc...), but I didn't have time in these days.

[tdzl2003]

The other reason to rewrite lua.js is we can use Proxy to optimize the way that metatable works. This could make lua.js run 25%-100% faster.

[Jennal]

Thank you for you replay. But I think this is a important issue that must be resolved, or lua.js become useless, because break is in common use.

I have an idea to easily solve this issue, you could try this:

do 
{
    var isbreak = false;
    isbreak = l.__call(l._f(function()
    {
        var a$2 = 1;
        b$1 = l.__add(b$1,1);
        if ((l.__eq(b$1,3)))
        {
            return true;//break
        }
    }),[]);
    if (isbreak) break;
}while (!(l.__eq(l.__get(_ENV,"a"),1)));

Just translate break into return, and check the return value after the block.

[tdzl2003]

This should be fixed in recent commits. I'll update web version later.