Enum QualifiedReceiverBase 

pub enum QualifiedReceiverBase {
    Variable(Vec<CodeUnit>),
    Type(Option<CodeUnit>),
    Ambiguous,
}

What a receiver spelled as a qualified name denotes.

ns::value.run() reads the member off the declared type of the variable ns::value; a type path spelled as a receiver reads it off the type itself. Forward navigation and the inverse walk both ask this before typing such a receiver, so the two directions accept the same receiver spellings (#2547).

Variants

Variable(Vec<CodeUnit>)

Every visible declaration of the one variable the path names.

Type(Option<CodeUnit>)

The type the path names when it names no variable.

Ambiguous

The path names more than one variable; typing either would be a guess.