44 lines
1.1 KiB
Rust
44 lines
1.1 KiB
Rust
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pub mod expand_enum;
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pub mod expand_struct;
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use attribute;
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use proc_macro2::Span;
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use quote;
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use syn;
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use syn::Ident;
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pub fn expand_derive_deserialize(ast: &syn::DeriveInput) -> Result<quote::Tokens, String> {
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let name = &ast.ident;
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let attrs = &ast.attrs;
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let data = &ast.data;
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let root_attrs = attribute::YaSerdeAttribute::parse(&attrs);
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let root = root_attrs.clone().root.unwrap_or(name.to_string());
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let impl_block =
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match data {
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&syn::Data::Struct(ref data_struct) => {
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expand_struct::parse(data_struct, &name, &root, &root_attrs.namespaces)
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},
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&syn::Data::Enum(ref data_enum) => {
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expand_enum::parse(data_enum, &name, &root, &root_attrs.namespaces)
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},
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&syn::Data::Union(ref _data_union) => {
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unimplemented!()
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},
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};
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let dummy_const = Ident::new(&format!("_IMPL_YA_DESERIALIZE_FOR_{}", name), Span::def_site());
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let generated = quote! {
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#[allow(non_upper_case_globals, unused_attributes, unused_qualifications)]
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const #dummy_const: () = {
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extern crate yaserde as _yaserde;
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#impl_block
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};
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};
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Ok(generated)
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}
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