Brace-less Object Literal as a Second Operand on a New Line

[xixixao]

I know this is similar to quite a few other tickets, but I couldn't find this particular one:

# operator followed by an operand on new line (works)
Tree = Null or
  Something

# brace-less object assignment (works)
BinaryTree =
  node: Num
  left: Self
  right: Self

# brace-less object as an argument (special case, works)
BinaryTree = transform
  node: Num
  left: Self
  right: Self

# brace-less object as an operand on a new line (doesn't work)
BinaryTree = Null or 
  node: Num
  left: Self
  right: Self

What I find the worst is that this is not even an error, just a very silent bug:

BinaryTree = Null || {
  node: Num
};

({
  left: Self,
  right: Self
});

I ran into this when playing with 'contracts'.

[xixixao]

The same result also occurs in this issue, in Satyr's last comment when using \ after return.

[aseemk]

+1

https://groups.google.com/forum/?fromgroups=#!topic/coffeescript/lV_WFCaRu24

[satyr]

It's caused by a combination of little-known features such as newline-suppression, indebt/outdebt, and inline-implicit-object-rule (#1871). Fun stuff.

[vendethiel]

Seems to work in coco thanks to void assignment tho.

BinaryTree = Null or void =
  node: Num
  left: Self
  right: Self

[satyr]

• Use [] = instead and the workaround works in Coffee too.
• Prefer do in Coco/LiveScript.

[jashkenas]

Fixed now on master, thanks to @troels. Enjoy.