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https://github.com/salsa-rs/salsa.git
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change #[salsa::query_group]
attribute to take a struct name
This commit is contained in:
parent
690a118472
commit
9b5c7eeb5e
23 changed files with 133 additions and 111 deletions
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@ -1,6 +1,5 @@
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use heck::SnakeCase;
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use proc_macro::TokenStream;
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use proc_macro2::Span;
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use syn::parse::{Parse, ParseStream};
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use syn::punctuated::Punctuated;
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use syn::{Ident, ItemStruct, Path, Token};
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@ -18,21 +17,29 @@ pub(crate) fn database(args: TokenStream, input: TokenStream) -> TokenStream {
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let mut output = proc_macro2::TokenStream::new();
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output.extend(quote! { #input });
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let query_group_names_camel: Vec<_> = query_groups
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let query_group_names_snake: Vec<_> = query_groups
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.iter()
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.map(|query_group| {
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let group_storage = query_group.query_group.clone();
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group_storage.segments.last().unwrap().value().ident.clone()
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let group_name = query_group.name();
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Ident::new(&group_name.to_string().to_snake_case(), group_name.span())
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})
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.collect();
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let query_group_names_snake: Vec<_> = query_group_names_camel
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let query_group_storage_names: Vec<_> = query_groups
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.iter()
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.map(|query_group_name_camel| {
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Ident::new(
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&query_group_name_camel.to_string().to_snake_case(),
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query_group_name_camel.span(),
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)
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.map(|QueryGroup { group_path }| {
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quote! {
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<#group_path as salsa::plumbing::QueryGroup<#database_name>>::GroupStorage
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}
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})
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.collect();
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let query_group_key_names: Vec<_> = query_groups
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.iter()
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.map(|QueryGroup { group_path }| {
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quote! {
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<#group_path as salsa::plumbing::QueryGroup<#database_name>>::GroupKey
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}
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})
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.collect();
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@ -40,21 +47,25 @@ pub(crate) fn database(args: TokenStream, input: TokenStream) -> TokenStream {
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// `foo::MyGroupGroupStorage`
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let mut storage_fields = proc_macro2::TokenStream::new();
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let mut has_group_impls = proc_macro2::TokenStream::new();
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for (query_group, query_group_name_snake) in query_groups.iter().zip(&query_group_names_snake) {
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for (((query_group, group_name_snake), group_storage), group_key) in query_groups
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.iter()
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.zip(&query_group_names_snake)
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.zip(&query_group_storage_names)
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.zip(&query_group_key_names)
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{
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let group_path = &query_group.group_path;
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let group_name = query_group.name();
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let group_storage = query_group.group_storage();
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let group_key = query_group.group_key();
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// rewrite the last identifier (`MyGroup`, above) to
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// (e.g.) `MyGroupGroupStorage`.
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storage_fields.extend(quote! { #query_group_name_snake: #group_storage<#database_name>, });
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storage_fields.extend(quote! {
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#group_name_snake: #group_storage,
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});
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has_group_impls.extend(quote! {
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impl ::salsa::plumbing::HasQueryGroup<#group_storage<#database_name>, #group_key>
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for #database_name
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{
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fn group_storage(db: &Self) -> &#group_storage<#database_name> {
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impl ::salsa::plumbing::HasQueryGroup<#group_path> for #database_name {
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fn group_storage(db: &Self) -> &#group_storage {
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let runtime = ::salsa::Database::salsa_runtime(db);
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&runtime.storage().#query_group_name_snake
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&runtime.storage().#group_name_snake
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}
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fn database_key(group_key: #group_key) -> __SalsaDatabaseKey {
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@ -90,9 +101,8 @@ pub(crate) fn database(args: TokenStream, input: TokenStream) -> TokenStream {
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// foo(<FooType as ::salsa::Query<#database_name>>::Key),
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// ```
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let mut variants = proc_macro2::TokenStream::new();
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for query_group in query_groups {
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for (query_group, group_key) in query_groups.iter().zip(&query_group_key_names) {
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let group_name = query_group.name();
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let group_key = query_group.group_key();
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variants.extend(quote!(
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#group_name(#group_key),
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));
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@ -114,11 +124,12 @@ pub(crate) fn database(args: TokenStream, input: TokenStream) -> TokenStream {
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//
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let mut for_each_ops = proc_macro2::TokenStream::new();
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for query_group in query_groups {
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let group_storage = query_group.group_storage();
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for (QueryGroup { group_path }, group_storage) in
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query_groups.iter().zip(&query_group_storage_names)
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{
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for_each_ops.extend(quote! {
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let storage: &#group_storage<#database_name> =
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::salsa::plumbing::HasQueryGroup::group_storage(self);
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let storage: &#group_storage =
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<Self as salsa::plumbing::HasQueryGroup<#group_path>>::group_storage(self);
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storage.for_each_query(self, &mut op);
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});
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}
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@ -184,13 +195,13 @@ impl Parse for QueryGroupList {
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#[derive(Clone, Debug)]
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struct QueryGroup {
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query_group: Path,
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group_path: Path,
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}
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impl QueryGroup {
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/// The name of the query group trait.
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fn name(&self) -> Ident {
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self.query_group
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self.group_path
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.segments
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.last()
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.unwrap()
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@ -198,35 +209,6 @@ impl QueryGroup {
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.ident
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.clone()
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}
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/// Construct the path to the group storage for a query group. For
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/// a query group at the path `foo::MyQuery`, this would be
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/// `foo::MyQueryGroupStorage`.
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fn group_storage(&self) -> Path {
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self.path_with_suffix("GroupStorage")
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}
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/// Construct the path to the group storage for a query group. For
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/// a query group at the path `foo::MyQuery`, this would be
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/// `foo::MyQueryGroupDatabaseKey`.
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fn group_key(&self) -> Path {
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self.path_with_suffix("GroupKey")
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}
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/// Construct a path leading to the query group, but with some
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/// suffix. So, for a query group at the path `foo::MyQuery`,
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/// this would be `foo::MyQueryXXX` where `XXX` is the provided
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/// suffix.
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fn path_with_suffix(&self, suffix: &str) -> Path {
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let mut group_storage = self.query_group.clone();
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let last_ident = &group_storage.segments.last().unwrap().value().ident;
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let storage_ident = Ident::new(
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&format!("{}{}", last_ident.to_string(), suffix),
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Span::call_site(),
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);
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group_storage.segments.last_mut().unwrap().value_mut().ident = storage_ident;
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group_storage
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}
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}
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impl Parse for QueryGroup {
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@ -234,8 +216,8 @@ impl Parse for QueryGroup {
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/// impl HelloWorldDatabase;
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/// ```
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fn parse(input: ParseStream) -> syn::Result<Self> {
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let query_group: Path = input.parse()?;
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Ok(QueryGroup { query_group })
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let group_path: Path = input.parse()?;
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Ok(QueryGroup { group_path })
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}
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}
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@ -3,12 +3,12 @@ use heck::CamelCase;
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use proc_macro::TokenStream;
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use proc_macro2::Span;
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use quote::ToTokens;
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use syn::{parse_macro_input, AttributeArgs, FnArg, Ident, ItemTrait, ReturnType, TraitItem};
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use syn::{parse_macro_input, FnArg, Ident, ItemTrait, ReturnType, TraitItem};
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/// Implementation for `[salsa::query_group]` decorator.
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pub(crate) fn query_group(args: TokenStream, input: TokenStream) -> TokenStream {
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let _args = parse_macro_input!(args as AttributeArgs);
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let input = parse_macro_input!(input as ItemTrait);
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let group_struct: Ident = parse_macro_input!(args as Ident);
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let input: ItemTrait = parse_macro_input!(input as ItemTrait);
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// println!("args: {:#?}", args);
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// println!("input: {:#?}", input);
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@ -121,12 +121,12 @@ pub(crate) fn query_group(args: TokenStream, input: TokenStream) -> TokenStream
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}
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let group_key = Ident::new(
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&format!("{}GroupKey", trait_name.to_string()),
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&format!("{}GroupKey__", trait_name.to_string()),
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Span::call_site(),
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);
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let group_storage = Ident::new(
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&format!("{}GroupStorage", trait_name.to_string()),
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&format!("{}GroupStorage__", trait_name.to_string()),
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Span::call_site(),
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);
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@ -235,6 +235,19 @@ pub(crate) fn query_group(args: TokenStream, input: TokenStream) -> TokenStream
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}
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};
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// Emit the query group struct and impl of `QueryGroup`.
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output.extend(quote! {
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/// Representative struct for the query group.
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#trait_vis struct #group_struct { }
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impl<DB__> salsa::plumbing::QueryGroup<DB__> for #group_struct
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where DB__: #trait_name
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{
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type GroupStorage = #group_storage<DB__>;
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type GroupKey = #group_key;
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}
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});
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// Emit an impl of the trait
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output.extend({
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let bounds = &input.supertraits;
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@ -242,7 +255,7 @@ pub(crate) fn query_group(args: TokenStream, input: TokenStream) -> TokenStream
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impl<T> #trait_name for T
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where
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T: #bounds,
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T: ::salsa::plumbing::HasQueryGroup<#group_storage<T>, #group_key>,
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T: ::salsa::plumbing::HasQueryGroup<#group_struct>
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{
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#query_fn_definitions
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}
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@ -277,6 +290,7 @@ pub(crate) fn query_group(args: TokenStream, input: TokenStream) -> TokenStream
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type Key = (#(#keys),*);
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type Value = #value;
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type Storage = salsa::plumbing::#storage<DB, Self>;
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type Group = #group_struct;
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type GroupStorage = #group_storage<DB>;
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type GroupKey = #group_key;
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@ -335,7 +349,7 @@ pub(crate) fn query_group(args: TokenStream, input: TokenStream) -> TokenStream
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) -> bool
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where
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DB__: #trait_name,
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DB__: ::salsa::plumbing::HasQueryGroup<#group_storage<DB__>, #group_key>,
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DB__: ::salsa::plumbing::HasQueryGroup<#group_struct>,
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{
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match self {
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#query_descriptor_maybe_change
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@ -361,7 +375,7 @@ pub(crate) fn query_group(args: TokenStream, input: TokenStream) -> TokenStream
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impl<DB__> #group_storage<DB__>
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where
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DB__: #trait_name,
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DB__: ::salsa::plumbing::HasQueryGroup<#group_storage<DB__>, #group_key>,
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DB__: ::salsa::plumbing::HasQueryGroup<#group_struct>,
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{
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#trait_vis fn for_each_query(
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&self,
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@ -1,7 +1,7 @@
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use crate::compiler;
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use std::sync::Arc;
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#[salsa::query_group]
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#[salsa::query_group(ClassTable)]
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pub trait ClassTableDatabase: compiler::CompilerDatabase {
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/// Get the fields.
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fn fields(&self, class: DefId) -> Arc<Vec<DefId>>;
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@ -13,7 +13,7 @@ use crate::compiler::{CompilerDatabase, Interner};
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/// to your context (e.g., a shared counter or some such thing). If
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/// mutations to that shared state affect the results of your queries,
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/// that's going to mess up the incremental results.
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#[salsa::database(class_table::ClassTableDatabase)]
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#[salsa::database(class_table::ClassTable)]
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#[derive(Default)]
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pub struct DatabaseImpl {
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runtime: salsa::Runtime<DatabaseImpl>,
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@ -4,14 +4,23 @@ use std::sync::Arc;
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// Step 1. Define the query group
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// A **query group** is a collection of queries (both inputs and
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// functions) that are defined in one particular spot. Each query group
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// represents some subset of the full set of queries you will use in your
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// application. Query groups can also depend on one another: so you might
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// have some basic query group A and then another query group B that uses
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// the queries from A and adds a few more. (These relationships must form
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// a DAG at present, but that is due to Rust's restrictions around
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// supertraits, which are likely to be lifted.)
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#[salsa::query_group]
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// functions) that are defined in one particular spot. Each query
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// group is defined by a representative struct (used internally by
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// Salsa) as well as a representative trait. By convention, for a
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// query group `Foo`, the struct is named `Foo` and the trait is named
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// `FooDatabase`. The name `FooDatabase` reflects the fact that the
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// trait is implemented by **the database**, which stores all the data
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// in the system. Each query group thus represents a subset of the
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// full data.
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//
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// To define a query group, you annotate a trait definition with the
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// `#[salsa::query_group(Foo)]` attribute macro. In addition to the
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// trait definition, the macro will generate a struct with the name
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// `Foo` that you provide, as well as various other bits of glue.
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//
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// Note that one query group can "include" another by listing the
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// trait for that query group as a supertrait.
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#[salsa::query_group(HelloWorld)]
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trait HelloWorldDatabase: salsa::Database {
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// For each query, we give the name, some input keys (here, we
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// have one key, `()`) and the output type `Arc<String>`. We can
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@ -52,15 +61,17 @@ fn length(db: &impl HelloWorldDatabase, (): ()) -> usize {
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// Step 3. Define the database struct
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// Define the actual database struct. This struct needs to be
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// annotated with `#[salsa::database(..)]`, which contains a list of
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// query groups that this database supports. This attribute macro will
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// generate the necessary impls so that the database implements all of
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// those traits.
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// annotated with `#[salsa::database(..)]`. The list `..` will be the
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// paths leading to the query group structs for each query group that
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// this database supports. This attribute macro will generate the
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// necessary impls so that the database implements the corresponding
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// traits as well (so, here, `DatabaseStruct` will implement the
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// `HelloWorldDatabase` trait).
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//
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// The database struct can contain basically anything you need, but it
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// must have a `runtime` field as shown, and you must implement the
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// `salsa::Database` trait (as shown below).
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#[salsa::database(HelloWorldDatabase)]
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#[salsa::database(HelloWorld)]
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#[derive(Default)]
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struct DatabaseStruct {
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runtime: salsa::Runtime<DatabaseStruct>,
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@ -349,6 +349,13 @@ pub trait Query<DB: Database>: Debug + Default + Sized + 'static {
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/// Internal struct storing the values for the query.
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type Storage: plumbing::QueryStorageOps<DB, Self> + Send + Sync;
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/// Associate query group struct.
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type Group: plumbing::QueryGroup<
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DB,
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GroupStorage = Self::GroupStorage,
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GroupKey = Self::GroupKey,
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>;
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/// Generated struct that contains storage for all queries in a group.
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type GroupStorage;
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@ -86,7 +86,7 @@ impl<DB, Q> GetQueryTable<Q> for DB
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where
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DB: Database,
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Q: Query<DB>,
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DB: HasQueryGroup<Q::GroupStorage, Q::GroupKey>,
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DB: HasQueryGroup<Q::Group>,
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{
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fn get_query_table(db: &DB) -> QueryTable<'_, DB, Q> {
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let group_storage: &Q::GroupStorage = HasQueryGroup::group_storage(db);
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@ -106,18 +106,26 @@ where
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key: <Q as Query<DB>>::Key,
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) -> <DB as DatabaseStorageTypes>::DatabaseKey {
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let group_key = Q::group_key(key);
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<DB as HasQueryGroup<_, _>>::database_key(group_key)
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<DB as HasQueryGroup<_>>::database_key(group_key)
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}
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}
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pub trait QueryGroup<DB: Database> {
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type GroupStorage;
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type GroupKey;
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}
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/// Trait implemented by a database for each group that it supports.
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/// `S` and `K` are the types for *group storage* and *group key*, respectively.
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pub trait HasQueryGroup<S, K>: Database {
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pub trait HasQueryGroup<G>: Database
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where
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G: QueryGroup<Self>,
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{
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/// Access the group storage struct from the database.
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fn group_storage(db: &Self) -> &S;
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fn group_storage(db: &Self) -> &G::GroupStorage;
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/// "Upcast" a group key into a database key.
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fn database_key(group_key: K) -> Self::DatabaseKey;
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fn database_key(group_key: G::GroupKey) -> Self::DatabaseKey;
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}
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pub trait QueryStorageOps<DB, Q>: Default
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@ -1,4 +1,4 @@
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#[salsa::database(Database)]
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#[salsa::database(GroupStruct)]
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#[derive(Default)]
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struct DatabaseImpl {
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runtime: salsa::Runtime<DatabaseImpl>,
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@ -10,7 +10,7 @@ impl salsa::Database for DatabaseImpl {
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}
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}
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#[salsa::query_group]
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#[salsa::query_group(GroupStruct)]
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trait Database: salsa::Database {
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// `a` and `b` depend on each other and form a cycle
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fn memoized_a(&self) -> ();
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@ -1,7 +1,7 @@
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use crate::group;
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use crate::log::{HasLog, Log};
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#[salsa::database(group::GcDatabase)]
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#[salsa::database(group::Gc)]
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#[derive(Default)]
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pub(crate) struct DatabaseImpl {
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runtime: salsa::Runtime<DatabaseImpl>,
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@ -1,6 +1,6 @@
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use crate::log::HasLog;
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#[salsa::query_group]
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#[salsa::query_group(Gc)]
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pub(crate) trait GcDatabase: salsa::Database + HasLog {
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||||
#[salsa::input]
|
||||
fn min(&self) -> usize;
|
||||
|
|
|
@ -2,7 +2,7 @@ use crate::implementation::{TestContext, TestContextImpl};
|
|||
use salsa::debug::DebugQueryTable;
|
||||
use salsa::Database;
|
||||
|
||||
#[salsa::query_group]
|
||||
#[salsa::query_group(Constants)]
|
||||
pub(crate) trait ConstantsDatabase: TestContext {
|
||||
#[salsa::input]
|
||||
fn input(&self, key: char) -> usize;
|
||||
|
|
|
@ -11,10 +11,10 @@ pub(crate) trait TestContext: salsa::Database {
|
|||
}
|
||||
|
||||
#[salsa::database(
|
||||
constants::ConstantsDatabase,
|
||||
memoized_dep_inputs::MemoizedDepInputsContext,
|
||||
memoized_inputs::MemoizedInputsContext,
|
||||
memoized_volatile::MemoizedVolatileContext
|
||||
constants::Constants,
|
||||
memoized_dep_inputs::MemoizedDepInputs,
|
||||
memoized_inputs::MemoizedInputs,
|
||||
memoized_volatile::MemoizedVolatile
|
||||
)]
|
||||
#[derive(Default)]
|
||||
pub(crate) struct TestContextImpl {
|
||||
|
|
|
@ -1,7 +1,7 @@
|
|||
use crate::implementation::{TestContext, TestContextImpl};
|
||||
use salsa::Database;
|
||||
|
||||
#[salsa::query_group]
|
||||
#[salsa::query_group(MemoizedDepInputs)]
|
||||
pub(crate) trait MemoizedDepInputsContext: TestContext {
|
||||
fn dep_memoized2(&self) -> usize;
|
||||
fn dep_memoized1(&self) -> usize;
|
||||
|
|
|
@ -1,7 +1,7 @@
|
|||
use crate::implementation::{TestContext, TestContextImpl};
|
||||
use salsa::Database;
|
||||
|
||||
#[salsa::query_group]
|
||||
#[salsa::query_group(MemoizedInputs)]
|
||||
pub(crate) trait MemoizedInputsContext: TestContext {
|
||||
fn max(&self) -> usize;
|
||||
#[salsa::input]
|
||||
|
|
|
@ -1,7 +1,7 @@
|
|||
use crate::implementation::{TestContext, TestContextImpl};
|
||||
use salsa::Database;
|
||||
|
||||
#[salsa::query_group]
|
||||
#[salsa::query_group(MemoizedVolatile)]
|
||||
pub(crate) trait MemoizedVolatileContext: TestContext {
|
||||
// Queries for testing a "volatile" value wrapped by
|
||||
// memoization.
|
||||
|
|
|
@ -1,4 +1,4 @@
|
|||
#[salsa::query_group]
|
||||
#[salsa::query_group(MyStruct)]
|
||||
trait MyDatabase: salsa::Database {
|
||||
#[salsa::invoke(another_module::another_name)]
|
||||
fn my_query(&self, key: ()) -> ();
|
||||
|
|
|
@ -1,7 +1,7 @@
|
|||
use salsa::{Database, ParallelDatabase, Snapshot};
|
||||
use std::panic::{self, AssertUnwindSafe};
|
||||
|
||||
#[salsa::query_group]
|
||||
#[salsa::query_group(PanicSafelyStruct)]
|
||||
trait PanicSafelyDatabase: salsa::Database {
|
||||
#[salsa::input]
|
||||
fn one(&self) -> usize;
|
||||
|
@ -13,7 +13,7 @@ fn panic_safely(db: &impl PanicSafelyDatabase) -> () {
|
|||
assert_eq!(db.one(), 1);
|
||||
}
|
||||
|
||||
#[salsa::database(PanicSafelyDatabase)]
|
||||
#[salsa::database(PanicSafelyStruct)]
|
||||
#[derive(Default)]
|
||||
struct DatabaseStruct {
|
||||
runtime: salsa::Runtime<DatabaseStruct>,
|
||||
|
|
|
@ -5,7 +5,7 @@ use salsa::Snapshot;
|
|||
use std::cell::Cell;
|
||||
use std::sync::Arc;
|
||||
|
||||
#[salsa::query_group]
|
||||
#[salsa::query_group(Par)]
|
||||
pub(crate) trait ParDatabase: Knobs + salsa::ParallelDatabase {
|
||||
#[salsa::input]
|
||||
fn input(&self, key: char) -> usize;
|
||||
|
@ -184,7 +184,7 @@ fn snapshot_me(db: &impl ParDatabase) {
|
|||
db.snapshot();
|
||||
}
|
||||
|
||||
#[salsa::database(ParDatabase)]
|
||||
#[salsa::database(Par)]
|
||||
#[derive(Default)]
|
||||
pub(crate) struct ParDatabaseImpl {
|
||||
runtime: salsa::Runtime<ParDatabaseImpl>,
|
||||
|
|
|
@ -12,7 +12,7 @@ const N_READER_OPS: usize = 100;
|
|||
struct Canceled;
|
||||
type Cancelable<T> = Result<T, Canceled>;
|
||||
|
||||
#[salsa::query_group]
|
||||
#[salsa::query_group(Stress)]
|
||||
trait StressDatabase: salsa::Database {
|
||||
#[salsa::input]
|
||||
fn a(&self, key: usize) -> usize;
|
||||
|
@ -33,7 +33,7 @@ fn c(db: &impl StressDatabase, key: usize) -> Cancelable<usize> {
|
|||
db.b(key)
|
||||
}
|
||||
|
||||
#[salsa::database(StressDatabase)]
|
||||
#[salsa::database(Stress)]
|
||||
#[derive(Default)]
|
||||
struct StressDatabaseImpl {
|
||||
runtime: salsa::Runtime<StressDatabaseImpl>,
|
||||
|
|
|
@ -1,6 +1,6 @@
|
|||
use salsa::Database;
|
||||
|
||||
#[salsa::query_group]
|
||||
#[salsa::query_group(HelloWorldStruct)]
|
||||
trait HelloWorldDatabase: salsa::Database {
|
||||
#[salsa::input]
|
||||
fn input(&self) -> String;
|
||||
|
@ -20,7 +20,7 @@ fn double_length(db: &impl HelloWorldDatabase) -> usize {
|
|||
db.length() * 2
|
||||
}
|
||||
|
||||
#[salsa::database(HelloWorldDatabase)]
|
||||
#[salsa::database(HelloWorldStruct)]
|
||||
#[derive(Default)]
|
||||
struct DatabaseStruct {
|
||||
runtime: salsa::Runtime<DatabaseStruct>,
|
||||
|
|
|
@ -1,7 +1,7 @@
|
|||
use crate::queries;
|
||||
use std::cell::Cell;
|
||||
|
||||
#[salsa::database(queries::Database)]
|
||||
#[salsa::database(queries::GroupStruct)]
|
||||
#[derive(Default)]
|
||||
pub(crate) struct DatabaseImpl {
|
||||
runtime: salsa::Runtime<DatabaseImpl>,
|
||||
|
|
|
@ -2,7 +2,7 @@ pub(crate) trait Counter: salsa::Database {
|
|||
fn increment(&self) -> usize;
|
||||
}
|
||||
|
||||
#[salsa::query_group]
|
||||
#[salsa::query_group(GroupStruct)]
|
||||
pub(crate) trait Database: Counter {
|
||||
fn memoized(&self) -> usize;
|
||||
#[salsa::volatile]
|
||||
|
|
|
@ -1,6 +1,6 @@
|
|||
use salsa::Database;
|
||||
|
||||
#[salsa::query_group]
|
||||
#[salsa::query_group(HelloWorld)]
|
||||
trait HelloWorldDatabase: salsa::Database {
|
||||
#[salsa::input]
|
||||
fn input(&self, a: u32, b: u32) -> u32;
|
||||
|
@ -30,7 +30,7 @@ fn trailing(_db: &impl HelloWorldDatabase, a: u32, b: u32) -> u32 {
|
|||
a - b
|
||||
}
|
||||
|
||||
#[salsa::database(HelloWorldDatabase)]
|
||||
#[salsa::database(HelloWorld)]
|
||||
#[derive(Default)]
|
||||
struct DatabaseStruct {
|
||||
runtime: salsa::Runtime<DatabaseStruct>,
|
||||
|
|
Loading…
Reference in a new issue