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pso_packet manual_flag attribute

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jake 2019-11-09 22:53:55 -08:00
parent 7dfd9205e5
commit d9b897d193
1 changed files with 28 additions and 0 deletions
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28
psopacket/src/lib.rs
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@ -342,6 +342,7 @@ pub fn pso_packet(attr: TokenStream, item: TokenStream) -> TokenStream {
let args = parse_macro_input!(attr as syn::AttributeArgs);
let mut cmd = 0;
let mut flag = true;
let mut manual_flag = false;
for a in args {
match &a {
NestedMeta::Lit(lit) => {
@ -353,6 +354,10 @@ pub fn pso_packet(attr: TokenStream, item: TokenStream) -> TokenStream {
if let syn::Meta::Path(syn::Path {segments, ..}) = k {
match segments[0].ident.to_string().as_str() {
"no_flag" => flag = false,
"manual_flag" => {
flag = false;
manual_flag = true;
},
_ => {
return syn::Error::new(segments[0].ident.span(), "unknown macro param").to_compile_error().into();
}
@ -368,6 +373,29 @@ pub fn pso_packet(attr: TokenStream, item: TokenStream) -> TokenStream {
Err(err) => return err
};
if manual_flag {
let mut found_flag = false;
for attr in attrs.iter() {
match attr {
AttrType::Array(_, ident, _, _) => {
if ident.to_string() == "flag" {
found_flag = true;
break;
}
},
AttrType::Value(_, ident, _) => {
if ident.to_string() == "flag" {
found_flag = true;
break;
}
}
}
}
if !found_flag {
return syn::Error::new(pkt_struct.ident.span(), "struct must have flag if manual_flag is set").to_compile_error().into();
}
}
let struct_def = generate_struct_def(pkt_struct.ident.clone(), &attrs);
let psopacket_impl = generate_psopacket_impl(cmd, pkt_struct.ident.clone(), &attrs, flag);
let debug_impl = generate_debug_impl(pkt_struct.ident.clone(), &attrs);