rodolphe/rust-opensmtpd
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Add the filter proc macro

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This commit is contained in:
Rodolphe Breard 2019-09-17 20:22:07 +02:00
parent 2dff22062c
commit 789a41b51e
1 changed files with 16 additions and 6 deletions
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20
opensmtpd-derive/src/lib.rs
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@ -26,8 +26,8 @@ macro_rules! parse_item {
};
}
#[proc_macro_attribute]
pub fn report(attr: TokenStream, input: TokenStream) -> TokenStream {
fn get_tokenstream(attr: TokenStream, input: TokenStream, type_str: &str) -> TokenStream {
let kind = parse_item!(type_str, TypePath);
let attr = parse_macro_input!(attr as OpenSmtpdAttributes);
let version = parse_item!(&attr.get_version(), TypePath);
let subsystem = parse_item!(&attr.get_subsystem(), TypePath);
@ -40,20 +40,30 @@ pub fn report(attr: TokenStream, input: TokenStream) -> TokenStream {
fn #fn_name() -> opensmtpd::Handler {
opensmtpd::Handler::new(
#version,
opensmtpd::entry::Kind::Report,
#kind,
#subsystem,
&#events,
|_output: &mut dyn opensmtpd::output::FilterOutput, entry: &opensmtpd::entry::Entry,| {
|_output: &mut dyn opensmtpd::output::FilterOutput, _entry: &opensmtpd::entry::Entry,| {
// TODO: look at `item.sig.output` and adapt the calling scheme.
// example: if no return, add `Ok(())`.
// https://docs.rs/syn/1.0.5/syn/struct.Signature.html
let inner_fn = |#fn_params| -> Result<(), String> {
#fn_body
};
inner_fn(entry)
inner_fn(_entry)
},
)
}
};
output.into()
}
#[proc_macro_attribute]
pub fn report(attr: TokenStream, input: TokenStream) -> TokenStream {
get_tokenstream(attr, input, "opensmtpd::entry::Kind::Report")
}
#[proc_macro_attribute]
pub fn filter(attr: TokenStream, input: TokenStream) -> TokenStream {
get_tokenstream(attr, input, "opensmtpd::entry::Kind::Filter")
}