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Improve error handling

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This commit is contained in:
vagola 2020-01-03 18:02:08 +03:00
parent 6d50407670
commit 0a0500239b
1 changed files with 17 additions and 17 deletions
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34
protocol-derive/src/lib.rs
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@ -25,7 +25,7 @@ pub fn derive_packet(input: proc_macro::TokenStream) -> TokenStream1 {
#decoder
})
}
_ => panic!("Packet derive are available only for structures"),
_ => panic!("Expected only structures"),
}
}
@ -82,27 +82,27 @@ fn parse_field_meta(meta_list: &Vec<NestedMeta>) -> PacketFieldMeta {
for meta in meta_list {
match meta {
NestedMeta::Meta(Meta::NameValue(m)) => match &m.path {
p if p.is_ident("with") => {
if let Lit::Str(lit_str) = &m.lit {
module = Some(lit_str.value());
}
}
p if p.is_ident("max_length") => {
if let Lit::Int(lit_int) = &m.lit {
NestedMeta::Meta(Meta::NameValue(named_meta)) => match &named_meta.path {
path if path.is_ident("with") => match &named_meta.lit {
Lit::Str(lit_str) => module = Some(lit_str.value()),
_ => panic!("\"with\" attribute value must be string"),
},
path if path.is_ident("max_length") => match &named_meta.lit {
Lit::Int(lit_int) => {
max_length = Some(
lit_int
.base10_parse::<u16>()
.expect("Failed to parse max length attribute"),
);
)
}
}
p => panic!(
"Packet derive received unrecognized attribute : \"{}\"",
p.get_ident().unwrap()
_ => panic!("\"max_length\" attribute value must be integer"),
},
path => panic!(
"Received unrecognized attribute : \"{}\"",
path.get_ident().unwrap()
),
},
_ => panic!("Packet derive support only named meta values"),
_ => panic!("Expected only named meta values"),
}
}
@ -117,7 +117,7 @@ fn get_packet_field_meta(field: &Field) -> Vec<NestedMeta> {
.map(|a| a.parse_meta().expect("Failed to parse field attribute"))
.map(|m| match m {
Meta::List(meta_list) => Vec::from_iter(meta_list.nested),
_ => panic!("Packet derive support only list attributes"),
_ => panic!("Expected only list attributes"),
})
.flatten()
.collect()
@ -130,7 +130,7 @@ fn quote_field<F: Fn(&Field) -> TokenStream2>(fields: &Fields, func: F) -> Token
Fields::Named(named_fields) => {
output.append_all(named_fields.named.iter().map(|f| func(f)))
}
_ => panic!("Packet derive are available only for named fields"),
_ => panic!("Expected only for named fields"),
}
output