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Allow #[serde(default)] on tuple structs

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This commit is contained in:
Mingun
2023-07-24 23:13:39 +05:00
parent 4aa54222f4
commit 5c33931422
13 changed files with 230 additions and 60 deletions
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serde_derive/src/internals/attr.rs
+10 -10
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@@ -405,20 +405,20 @@ impl Container {
if let Some(path) = parse_lit_into_expr_path(cx, DEFAULT, &meta)? {
match &item.data {
syn::Data::Struct(syn::DataStruct { fields, .. }) => match fields {
syn::Fields::Named(_) => {
syn::Fields::Named(_) | syn::Fields::Unnamed(_) => {
default.set(&meta.path, Default::Path(path));
}
syn::Fields::Unnamed(_) | syn::Fields::Unit => {
let msg = "#[serde(default = \"...\")] can only be used on structs with named fields";
syn::Fields::Unit => {
let msg = "#[serde(default = \"...\")] can only be used on structs with fields";
cx.syn_error(meta.error(msg));
}
},
syn::Data::Enum(_) => {
let msg = "#[serde(default = \"...\")] can only be used on structs with named fields";
let msg = "#[serde(default = \"...\")] can only be used on structs with fields";
cx.syn_error(meta.error(msg));
}
syn::Data::Union(_) => {
let msg = "#[serde(default = \"...\")] can only be used on structs with named fields";
let msg = "#[serde(default = \"...\")] can only be used on structs with fields";
cx.syn_error(meta.error(msg));
}
}
@@ -427,20 +427,20 @@ impl Container {
// #[serde(default)]
match &item.data {
syn::Data::Struct(syn::DataStruct { fields, .. }) => match fields {
syn::Fields::Named(_) => {
syn::Fields::Named(_) | syn::Fields::Unnamed(_) => {
default.set(meta.path, Default::Default);
}
syn::Fields::Unnamed(_) | syn::Fields::Unit => {
let msg = "#[serde(default)] can only be used on structs with named fields";
syn::Fields::Unit => {
let msg = "#[serde(default)] can only be used on structs with fields";
cx.error_spanned_by(fields, msg);
}
},
syn::Data::Enum(_) => {
let msg = "#[serde(default)] can only be used on structs with named fields";
let msg = "#[serde(default)] can only be used on structs with fields";
cx.syn_error(meta.error(msg));
}
syn::Data::Union(_) => {
let msg = "#[serde(default)] can only be used on structs with named fields";
let msg = "#[serde(default)] can only be used on structs with fields";
cx.syn_error(meta.error(msg));
}
}