Does a list of structs really need braces?

[posch]

At the top level, braces are optional. The contents become a struct if there's a field. If there's no field, it's not a struct.

Not a struct:

$ cat 42.cue 
42

$ cue export 42.cue 
42

A struct that doesn't need braces:

$ cat pi.cue 
pi: 3

$ cue export pi.cue 
{
    "pi": 3
}

This is really nice, and I wonder why I need braces in a list of structs:

$ cat list.cue 
[
        {
                pi: 3
        },
        {
                e: 3
        },
]

$ cue export list.cue 
[
    {
        "pi": 3
    },
    {
        "e": 3
    }
]

This is a two-element list. The elements are structs with one field each. Would it be ambiguous to write it without braces?

$ cat list2.cue 
[
        pi: 3,
        e:  3,
]

[mvdan]

With your proposed syntax, how would one know where the boundary between the structs is? Or how many structs there are?

This is not an issue with the top-level struct because it's always one struct.

[posch]

True. I forgot that commas also separate struct members. I rarely use them in structs.