Operator new not properly parsed in &convert

[bbannier]

I would like to turn a data behind a unit field into a reference, e.g., to avoid copying when passing that field on. This works if I introduced a helper function.

module foo;

type X = unit {
    xs: bytes &eod &convert=as_ref($$);
};

function as_ref(xs: bytes): bytes& { return new xs; }

I however cannot seem to avoid the function, e.g.,

type X = unit {
    xs: bytes &eod &convert=new $$;
};

$ spicyc -j foo.spicy
[error] foo.spicy:4:33: syntax error, unexpected DOLLARDOLLAR
[error] spicyc: parse error

The only way I could make this syntax was to use a literal there which is not what I intend.

Looking at the parser, it looks like $$ might not be a scoped expression here,

spicy/spicy/toolchain/src/compiler/parser/parser.yy

Lines 977 to 979 in 817c2ed

	| NEW ctor { $$ = hilti::expression::UnresolvedOperator(hilti::operator_::Kind::New, {hilti::expression::Ctor(std::move($2), __loc__), hilti::expression::Ctor(hilti::ctor::Tuple({}, __loc__))}, __loc__); }
	| NEW scoped_id { $$ = hilti::expression::UnresolvedOperator(hilti::operator_::Kind::New, {hilti::expression::UnresolvedID(std::move($2), __loc__), hilti::expression::Ctor(hilti::ctor::Tuple({}, __loc__))}, __loc__); }
	| NEW scoped_id '(' opt_exprs ')' { $$ = hilti::expression::UnresolvedOperator(hilti::operator_::Kind::New, {hilti::expression::UnresolvedID(std::move($2), __loc__), hilti::expression::Ctor(hilti::ctor::Tuple(std::move($4), __loc__))}, __loc__); }