refactor: InferenceDomainMapValuesのインスタンスをマクロで作る

 #737 に向け。また #851 の後にdecode.onnx入りのVVMに対応するときも同様に
役に立つはず。

Cargo.toml

@@ -27,6 +27,7 @@ const_format = "0.2.33"
 cstr = "0.2.12" # https://github.com/dtolnay/syn/issues/1502
 derive-getters = "0.2.0"
 derive-new = "0.5.9"
+derive-syn-parse = "0.2.0"
 derive_more = "0.99.17"
 duct = "0.13.7"
 duplicate = "1.0.0"

crates/voicevox_core/src/infer.rs

@@ -3,7 +3,7 @@ mod model_file;
 pub(crate) mod runtimes;
 pub(crate) mod session_set;
 
-use std::{borrow::Cow, collections::BTreeSet, fmt::Debug};
+use std::{borrow::Cow, collections::BTreeSet, fmt::Debug, ops::Index, sync::Arc};
 
 use derive_new::new;
 use duplicate::duplicate_item;
@@ -51,6 +51,7 @@ pub(crate) trait InferenceRuntime: 'static {
 /// 共に扱われるべき推論操作の集合を示す。
 pub(crate) trait InferenceDomain: Sized {
     type Operation: InferenceOperation;
+    type Manifest: Index<Self::Operation, Output = Arc<str>>;
 
     /// 対応する`StyleType`。
     ///

crates/voicevox_core/src/infer/domains.rs

@@ -63,3 +63,12 @@ pub(crate) trait InferenceDomainMapValues {
 impl<T> InferenceDomainMapValues for (T,) {
     type Talk = T;
 }
+
+macro_rules! inference_domain_map_values {
+    (for<$arg:ident> $body:ty) => {
+        (::macros::substitute_type!(
+            $body where $arg = crate::infer::domains::TalkDomain as crate::infer::InferenceDomain
+        ),)
+    };
+}
+pub(crate) use inference_domain_map_values;

crates/voicevox_core/src/infer/domains/talk.rs

@@ -4,7 +4,7 @@ use enum_map::Enum;
 use macros::{InferenceInputSignature, InferenceOperation, InferenceOutputSignature};
 use ndarray::{Array0, Array1, Array2};
 
-use crate::StyleType;
+use crate::{manifest::TalkManifest, StyleType};
 
 use super::super::{
     InferenceDomain, InferenceInputSignature as _, InferenceOutputSignature as _, OutputTensor,
@@ -14,6 +14,7 @@ pub(crate) enum TalkDomain {}
 
 impl InferenceDomain for TalkDomain {
     type Operation = TalkOperation;
+    type Manifest = TalkManifest;
 
     fn style_types() -> &'static BTreeSet<StyleType> {
         static STYLE_TYPES: LazyLock<BTreeSet<StyleType>> =

crates/voicevox_core/src/manifest.rs

@@ -12,7 +12,7 @@ use serde::{de, Deserialize, Deserializer, Serialize};
 use serde_with::{serde_as, DisplayFromStr};
 
 use crate::{
-    infer::domains::{InferenceDomainMap, TalkOperation},
+    infer::domains::{inference_domain_map_values, InferenceDomainMap, TalkOperation},
     StyleId, VoiceModelId,
 };
 
@@ -79,7 +79,7 @@ pub struct Manifest {
     domains: InferenceDomainMap<ManifestDomains>,
 }
 
-pub(crate) type ManifestDomains = (Option<TalkManifest>,);
+pub(crate) type ManifestDomains = inference_domain_map_values!(for<D> Option<D::Manifest>);
 
 #[derive(Deserialize, IndexForFields)]
 #[cfg_attr(test, derive(Default))]

crates/voicevox_core/src/status.rs

@@ -9,7 +9,7 @@ use itertools::iproduct;
 use crate::{
     error::{ErrorRepr, LoadModelError, LoadModelErrorKind, LoadModelResult},
     infer::{
-        domains::{InferenceDomainMap, TalkDomain, TalkOperation},
+        domains::{inference_domain_map_values, InferenceDomainMap, TalkDomain},
         session_set::{InferenceSessionCell, InferenceSessionSet},
         InferenceDomain, InferenceInputSignature, InferenceRuntime, InferenceSessionOptions,
         InferenceSignature,
@@ -338,10 +338,11 @@ impl InferenceDomainMap<ModelBytesWithInnerVoiceIdsByDomain> {
     }
 }
 
-type SessionOptionsByDomain = (EnumMap<TalkOperation, InferenceSessionOptions>,);
+type SessionOptionsByDomain =
+    inference_domain_map_values!(for<D> EnumMap<D::Operation, InferenceSessionOptions>);
 
 type SessionSetsWithInnerVoiceIdsByDomain<R> =
-    (Option<(StyleIdToInnerVoiceId, InferenceSessionSet<R, TalkDomain>)>,);
+    inference_domain_map_values!(for<D> Option<(StyleIdToInnerVoiceId, InferenceSessionSet<R, D>)>);
 
 #[cfg(test)]
 mod tests {

crates/voicevox_core/src/voice_model.rs

@@ -23,10 +23,10 @@ use crate::{
     asyncs::{Async, Mutex as _},
     error::{LoadModelError, LoadModelErrorKind, LoadModelResult},
     infer::{
-        domains::{InferenceDomainMap, TalkDomain, TalkOperation},
+        domains::{inference_domain_map_values, InferenceDomainMap, TalkDomain, TalkOperation},
         InferenceDomain,
     },
-    manifest::{Manifest, ManifestDomains, StyleIdToInnerVoiceId, TalkManifest},
+    manifest::{Manifest, ManifestDomains, StyleIdToInnerVoiceId},
     SpeakerMeta, StyleMeta, StyleType, VoiceModelMeta,
 };
 
@@ -35,8 +35,9 @@ use crate::{
 /// [`VoiceModelId`]: VoiceModelId
 pub type RawVoiceModelId = Uuid;
 
-pub(crate) type ModelBytesWithInnerVoiceIdsByDomain =
-    (Option<(StyleIdToInnerVoiceId, EnumMap<TalkOperation, Vec<u8>>)>,);
+pub(crate) type ModelBytesWithInnerVoiceIdsByDomain = inference_domain_map_values!(
+    for<D> Option<(StyleIdToInnerVoiceId, EnumMap<D::Operation, Vec<u8>>)>
+);
 
 /// 音声モデルID。
 #[derive(
@@ -251,7 +252,7 @@ impl<A: Async> Inner<A> {
 }
 
 type InferenceModelEntries<'manifest> =
-    (Option<InferenceModelEntry<TalkDomain, &'manifest TalkManifest>>,);
+    inference_domain_map_values!(for<D> Option<InferenceModelEntry<D, &'manifest D::Manifest>>);
 
 struct InferenceModelEntry<D: InferenceDomain, M> {
     indices: EnumMap<D::Operation, usize>,

crates/voicevox_core_macros/Cargo.toml

@@ -10,10 +10,11 @@ name = "macros"
 proc-macro = true
 
 [dependencies]
+derive-syn-parse.workspace = true
 indexmap.workspace = true
 proc-macro2.workspace = true
 quote.workspace = true
-syn = { workspace = true, features = ["extra-traits", "full"] }
+syn = { workspace = true, features = ["extra-traits", "full", "visit"] }
 
 [lints.rust]
 unsafe_code = "forbid"

crates/voicevox_core_macros/src/inference_domains.rs

@@ -0,0 +1,83 @@
+use derive_syn_parse::Parse;
+use quote::ToTokens as _;
+use syn::{
+    parse_quote,
+    visit_mut::{self, VisitMut},
+    Path, PathArguments, PathSegment, Token, Type, TypePath,
+};
+
+pub(crate) fn substitute_type(input: Substitution) -> syn::Result<proc_macro2::TokenStream> {
+    let Substitution {
+        mut body,
+        arg,
+        replacement,
+        replacement_as,
+        ..
+    } = input;
+
+    Substitute {
+        arg,
+        replacement,
+        replacement_as,
+    }
+    .visit_type_mut(&mut body);
+
+    return Ok(body.to_token_stream());
+
+    struct Substitute {
+        arg: syn::Ident,
+        replacement: Path,
+        replacement_as: Path,
+    }
+
+    impl VisitMut for Substitute {
+        fn visit_type_mut(&mut self, i: &mut Type) {
+            visit_mut::visit_type_mut(self, i);
+
+            let Type::Path(TypePath {
+                qself: None,
+                path:
+                    Path {
+                        leading_colon: None,
+                        segments,
+                    },
+            }) = i
+            else {
+                return;
+            };
+
+            match &mut *segments.iter_mut().collect::<Vec<_>>() {
+                [PathSegment {
+                    ident,
+                    arguments: PathArguments::None,
+                }] if *ident == self.arg => {
+                    let replacement = self.replacement.clone();
+                    *i = parse_quote!(#replacement);
+                }
+                [PathSegment {
+                    ident: ident1,
+                    arguments: PathArguments::None,
+                }, seg]
+                    if *ident1 == self.arg =>
+                {
+                    let replacement = self.replacement.clone();
+                    let replacement_as = self.replacement_as.clone();
+                    *i = parse_quote!(<#replacement as #replacement_as>::#seg);
+                }
+                _ => {}
+            }
+        }
+    }
+}
+
+/// `$body:ty where $arg:ident = $replacement:path as $replacement_as:path`
+#[derive(Parse)]
+pub(crate) struct Substitution {
+    body: Type,
+    _where_token: Token![where],
+    arg: syn::Ident,
+    _eq_token: Token![=],
+    replacement: Path,
+    _as_token: Token![as],
+    replacement_as: Path,
+}