Struct ClassifiedArg 

pub struct ClassifiedArg {
    pub kind: ArgRole,
    pub signature: Option<TokenStream>,
    pub call: Option<TokenStream>,
    pub generic: Option<TokenStream>,
    pub registration: Option<TokenStream>,
    pub prelude: Option<TokenStream>,
    pub once_signature: Option<TokenStream>,
    pub once_call: Option<TokenStream>,
    pub once_generic: Option<TokenStream>,
}

One argument, classified once, with every emission fragment precomputed.

Fields

kind: ArgRole

signature: Option<TokenStream>

name: Type in the generated signature (None: not part of the signature).

call: Option<TokenStream>

Argument(s) for the FFI call (None: emits nothing).

generic: Option<TokenStream>

Generic bound contributed to the where clause.

registration: Option<TokenStream>

Post-call dependency registration for retained handlers.

prelude: Option<TokenStream>

Statement(s) emitted before the FFI call (e.g. the IntoCStr shadow for C-string args so the Cow outlives the call).

once_signature: Option<TokenStream>

_fn variant fragments (sync handlers swap Handler for a stack closure).

once_call: Option<TokenStream>

once_generic: Option<TokenStream>