OMGeeky/confique
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Add #[default = "confique::Partial::empty"] attributes to child fields

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That was they can be missing in the config source without causing a
deserialization error.
This commit is contained in:
Lukas Kalbertodt
2021-05-16 14:57:44 +02:00
parent 8abc07bcda
commit 6d1e9e99c6
1 changed files with 8 additions and 4 deletions
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12
macro/src/gen.rs
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@@ -74,13 +74,17 @@ fn gen_partial_mod(input: &ir::Input) -> TokenStream {
// Prepare some tokens per field.
let field_names = input.fields.iter().map(|f| &f.name).collect::<Vec<_>>();
let field_types = input.fields.iter().map(|f| {
let struct_fields = input.fields.iter().map(|f| {
let name = &f.name;
if f.is_leaf() {
let inner = unwrap_option(&f.ty).unwrap_or(&f.ty);
quote! { Option<#inner> }
quote! { #inner_visibility #name: Option<#inner>, }
} else {
let ty = &f.ty;
quote! { <#ty as confique::Config>::Partial }
quote! {
#[serde(default = "confique::Partial::empty")]
#inner_visibility #name: <#ty as confique::Config>::Partial,
}
}
});
let empty_values = input.fields.iter().map(|f| {
@@ -128,7 +132,7 @@ fn gen_partial_mod(input: &ir::Input) -> TokenStream {
#[derive(confique::serde::Deserialize)]
#inner_visibility struct #struct_name {
#( #inner_visibility #field_names: #field_types, )*
#( #struct_fields )*
}
impl confique::Partial for #struct_name {