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Implement skip_serializing for enum variant

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This commit is contained in:
Shing Lyu
2016-12-24 14:37:23 +08:00
parent 2c984980a0
commit 2fea8c9c28
3 changed files with 148 additions and 63 deletions
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serde_codegen/src/ser.rs
+108 -62
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@@ -255,77 +255,123 @@ fn serialize_variant(
let variant_ident = variant.ident.clone();
let variant_name = variant.attrs.name().serialize_name();
let skipped_err = quote! {
Err(_serde::ser::Error::invalid_value("The enum variant was skipped for serialization"))
};
match variant.style {
Style::Unit => {
quote! {
#type_ident::#variant_ident =>
_serde::ser::Serializer::serialize_unit_variant(
_serializer,
#type_name,
#variant_index,
#variant_name,
),
}
},
Style::Newtype => {
let block = serialize_newtype_variant(
type_name,
variant_index,
variant_name,
ty,
generics,
&variant.fields[0],
);
if variant.attrs.skip_serializing() {
match variant.style {
Style::Unit => {
quote! {
#type_ident::#variant_ident => #skipped_err,
}
},
Style::Newtype => {
quote! {
#type_ident::#variant_ident(ref __simple_value) => #skipped_err,
}
},
Style::Tuple => {
let field_names: Vec<Tokens> = (0 .. variant.fields.len())
.map(|i| {
let id = aster::id(format!("__field{}", i));
quote!(ref #id)
})
.collect();
quote! {
#type_ident::#variant_ident(ref __simple_value) => #block,
let pat = quote!(#type_ident::#variant_ident(#(#field_names),*));
quote! {
#pat => #skipped_err,
}
}
},
Style::Tuple => {
let field_names: Vec<Tokens> = (0 .. variant.fields.len())
.map(|i| {
let id = aster::id(format!("__field{}", i));
Style::Struct => {
let fields = variant.fields.iter().map(|field| {
let id = match field.ident {
Some(ref name) => name.clone(),
None => panic!("struct variant has unnamed fields"),
};
quote!(ref #id)
})
.collect();
});
let pat = quote!(#type_ident::#variant_ident { #(#fields),* });
let pat = quote!(#type_ident::#variant_ident(#(#field_names),*));
let block = serialize_tuple_variant(
type_name,
variant_index,
variant_name,
generics,
ty,
&variant.fields,
);
quote! {
#pat => { #block }
quote! {
#pat => #skipped_err,
}
}
}
Style::Struct => {
let fields = variant.fields.iter().map(|field| {
let id = match field.ident {
Some(ref name) => name.clone(),
None => panic!("struct variant has unnamed fields"),
};
quote!(ref #id)
});
let pat = quote!(#type_ident::#variant_ident { #(#fields),* });
} else { // variant wasn't skipped
match variant.style {
Style::Unit => {
quote! {
#type_ident::#variant_ident =>
_serde::ser::Serializer::serialize_unit_variant(
_serializer,
#type_name,
#variant_index,
#variant_name,
),
}
},
Style::Newtype => {
let block = serialize_newtype_variant(
type_name,
variant_index,
variant_name,
ty,
generics,
&variant.fields[0],
);
let block = serialize_struct_variant(
variant_index,
variant_name,
generics,
ty,
&variant.fields,
item_attrs,
);
quote! {
#type_ident::#variant_ident(ref __simple_value) => #block,
}
},
Style::Tuple => {
let field_names: Vec<Tokens> = (0 .. variant.fields.len())
.map(|i| {
let id = aster::id(format!("__field{}", i));
quote!(ref #id)
})
.collect();
quote! {
#pat => { #block }
let pat = quote!(#type_ident::#variant_ident(#(#field_names),*));
let block = serialize_tuple_variant(
type_name,
variant_index,
variant_name,
generics,
ty,
&variant.fields,
);
quote! {
#pat => { #block }
}
}
Style::Struct => {
let fields = variant.fields.iter().map(|field| {
let id = match field.ident {
Some(ref name) => name.clone(),
None => panic!("struct variant has unnamed fields"),
};
quote!(ref #id)
});
let pat = quote!(#type_ident::#variant_ident { #(#fields),* });
let block = serialize_struct_variant(
variant_index,
variant_name,
generics,
ty,
&variant.fields,
item_attrs,
);
quote! {
#pat => { #block }
}
}
}
}