Enum ScopeMode

pub enum ScopeMode {
    Expand,
    SubExpand,
    AutoBraceSemi,
}

The scope mode for the product expansion. This defines how scopes are handled at the top level.

Variants

Expand

Expand products in all scopes, including the root scope.

SubExpand

Expand products in sub-scopes but not in the root scope. Thus one has to insert at least one manual scope with ${ } to expand products.

AutoBraceSemi

Insert scopes automatically and close/expand them after a ending brace or a semicolon. Then start a new scope This is convenient when a lot structs or impls shall be independently expanded.

Example

impl Foo for $((First)(Second)) { }
impl Bar for $((Third)(Fourth)) { }

will treat each impl item as it is surrounded by it own scope and expand to:

impl Foo for First { }
impl Foo for Second { }
impl Bar for Third { }
impl Bar for Fourth { }