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create struct and fields

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This commit is contained in:
Niko Matsakis 2019-01-21 07:47:17 -05:00
parent 7b6254924e
commit 3add1337f6
1 changed files with 33 additions and 2 deletions
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35
components/salsa-macros/src/database_storage.rs
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@ -20,9 +20,40 @@ use syn::{Ident, Path, Token};
///
/// impl Database {
pub(crate) fn database_storage(input: TokenStream) -> TokenStream {
let _input: DatabaseStorage = syn::parse_macro_input!(input as DatabaseStorage);
let DatabaseStorage {
storage_struct_name,
database_name,
query_groups,
} = syn::parse_macro_input!(input as DatabaseStorage);
unimplemented!()
// For each query `fn foo() for FooType` create
//
// ```
// foo: <FooType as ::salsa::Query<#database_name>>::Storage,
// ```
let mut fields = proc_macro2::TokenStream::new();
for query_group in &query_groups {
for Query {
query_name,
query_type,
} in &query_group.queries
{
fields.extend(quote! {
#query_name: <#query_type as ::salsa::Query<#database_name>>::Storage,
});
}
}
let output = quote! {
#[derive(Default)]
// XXX attributes
// XXX visibility
struct #storage_struct_name {
#fields
}
};
output.into()
}
struct DatabaseStorage {