How do attributes propagate through structs?

[cueckoo]

Originally opened by @verdverm in cuelang/cue#888

In the following example, I am trying to understand how attributes propagate with definitions (though it looks like regular structs have the same results). I've tried several variations across conjunction and embedding.

I expected the attributes to propagate more than they do (for the Bs and Cs). Is this a bug or intended behavior?

main.cue

// FieldAttr on field in def
#A: {
        s: string @input()
}
// DeclAttribute on def
#B: {
        @input()
        s: string
}
// FieldAttr on def
#C: {
        s: string
} @input()

a1: #A
a2: { #A }
b1: #B
b2: { #B }
c1: #C
c2: { #C }

cue eval -A main.cue

#A: {
    s: string @input()
}
#B: {
    @input()
    s: string
}
#C: {
    s: string
} @input()
a1: {
    s: string @input()
}
a2: {
    s: string @input()
}
b1: {
    s: string
}
b2: {
    s: string
}
c1: {
    s: string
}
c2: {
    s: string
}

[cueckoo]

Original reply by @mpvl in cuelang/cue#888 (comment)

It seems that field attributes get propagate and declaration attributes not. If so, that is a bug. All attributes should be propagated.

[cueckoo]

Original reply by @verdverm in cuelang/cue#888 (comment)

Filed cuelang/cue#894