Macros are broken (outside of the online REPL)

[SkyyySi]

The code

macro INVERT = (var) ->
    "#{var} = not #{var}"

$INVERT(x)

used to be valid and produce the following Lua code:

local x = 5;
x = not x

However, after having installed Yuescript 0.16.5, this behavior seems to be broken, with it now resulting in the following compilation error:

Failed to compile: test2.yue
5: left hand expression is not assignable
$INVERT(x)
^

However, weirdly, the online REPL seems to be unaffected by this.

[pigpigyyy]

Can you show me the full codes in your "test2.yue" ?

[SkyyySi]

Can you show me the full codes in your "test2.yue" ?

Sure:

macro INVERT = (var) ->
    print(var)
    "#{var} = not #{var}"

$INVERT(x)

The print statement prints that var is a nil value (note to self: why did strip that line out? That sounds like it's quite important here).

For good measure, I also tested this in the interactive (offline) REPL:

macro test = (x, y, z) -> "'#{x}, #{y}, #{z}'"

When running that code as $test("foo", "bar", "biz"), I get back the string nil, nil, nil.

---

In case that helps, here's some info on my specific setup (since this issue doesn't occur in the online REPL, this issue may be related to that):

• OS: Arch Linux
• Lua version: 5.1
• Install method: sudo luarocks install --lua-version=5.1 yuescript

I think the previous version of Yuescript I used was 0.16.1, but I also recently compiled just fine on a different, more recent setup on my laptop, so I'm guessing that this issue was only introduced in 0.16.5 or maybe 0.16.4.

[pigpigyyy]

Found there were wrong arguments passing while expanding macro. The problem was there for a long time and lacking test cases to reveal it. Should be fixed by 78433df36c5b492f366ba57d852f5393b786cfff now.