Error code E0666
impl Trait
types cannot appear nested in the generic arguments of other
impl Trait
types.
Erroneous code example:
ⓘ
Type parameters for impl Trait
types must be explicitly defined as named
generic parameters:
impl Trait
types cannot appear nested in the generic arguments of other
impl Trait
types.
Erroneous code example:
ⓘ
Type parameters for impl Trait
types must be explicitly defined as named
generic parameters: