Support attributes on impl block ; Improve ignore category message ; Fix external methods are wrong ignored

frb_codegen/src/library/codegen/generator/api_dart/spec_generator/mod.rs

@@ -155,7 +155,7 @@ fn compute_skips(mir_pack: &MirPack, namespace: &Namespace) -> Vec<MirSkip> {
         .filter(|t| &t.namespace == namespace)
         .map(|name| MirSkip {
             name: name.clone(),
-            reason: MirSkipReason::IgnoredTypeNotUsedByPub,
+            reason: MirSkipReason::IgnoreBecauseTypeNotUsedByPub,
         })
         .collect_vec();
 

frb_codegen/src/library/codegen/ir/mir/skip.rs

@@ -8,32 +8,37 @@ pub struct MirSkip {
 
 #[derive(Copy, PartialOrd, Ord)]
 pub(crate) enum MirSkipReason {
-    IgnoredFunctionNotPub,
-    IgnoredFunctionGeneric,
-    IgnoredTypeNotUsedByPub,
-    IgnoredMisc,
-    IgnoredSilently,
+    IgnoreBecauseFunctionNotPub,
+    IgnoreBecauseFunctionGeneric,
+    IgnoreBecauseTypeNotUsedByPub,
+    IgnoreBecauseExplicitAttribute,
+    IgnoreBecauseType,
+    IgnoreBecauseParseMethodOwnerTy,
+    IgnoreBecauseParseOwnerCannotFindTrait,
+    IgnoreBecauseNotAllowedOwner,
+    IgnoreBecauseOwnerTyShouldIgnore,
+    IgnoreSilently,
     Err,
 }
 }
 
 impl MirSkipReason {
-    pub(crate) fn explanation_prefix(&self) -> Option<&'static str> {
+    pub(crate) fn explanation_prefix(&self) -> Option<String> {
         Some(match self {
-            Self::IgnoredFunctionNotPub => {
-                "These functions are ignored because they are not marked as `pub`"
+            Self::IgnoreBecauseFunctionNotPub => {
+                "These functions are ignored because they are not marked as `pub`".to_owned()
             }
-            Self::IgnoredFunctionGeneric => {
-                "These functions are ignored because they have generic arguments"
+            Self::IgnoreBecauseFunctionGeneric => {
+                "These functions are ignored because they have generic arguments".to_owned()
             }
-            Self::IgnoredTypeNotUsedByPub => {
-                "These types are ignored because they are not used by any `pub` functions"
+            Self::IgnoreBecauseTypeNotUsedByPub => {
+                "These types are ignored because they are not used by any `pub` functions".to_owned()
             }
-            Self::IgnoredMisc => "These functions are ignored",
-            Self::IgnoredSilently => return None,
+            Self::IgnoreSilently => return None,
             Self::Err => {
-                "These functions have error during generation (see debug logs or enable `stop_on_error: true` for more details)"
+                "These functions have error during generation (see debug logs or enable `stop_on_error: true` for more details)".to_owned()
             }
+            _ => format!("These functions are ignored (category: {:?})", self)
         })
     }
 }

frb_codegen/src/library/codegen/parser/hir/flat/parser/syn_item/item_impl.rs

@@ -5,7 +5,7 @@ use crate::codegen::ir::hir::misc::item_fn::GeneralizedItemFn;
 use crate::codegen::ir::hir::naive_flat::item::HirNaiveFlatItemMeta;
 use crate::if_then_some;
 use itertools::Itertools;
-use syn::{ImplItem, ItemImpl};
+use syn::{Attribute, ImplItem, ImplItemFn, ItemImpl};
 
 pub(crate) fn parse_syn_item_impl(
     target: &mut HirFlatPack,
@@ -29,6 +29,8 @@ fn parse_functions(
     meta: &HirNaiveFlatItemMeta,
     trait_def_name: &Option<String>,
 ) -> Vec<HirFlatFunction> {
+    let attrs_item_impl = item_impl.attrs;
+
     (item_impl.items.into_iter())
         .filter_map(|item| if_then_some!(let ImplItem::Fn(impl_item_fn) = item, impl_item_fn))
         .map(|impl_item_fn| HirFlatFunction {
@@ -37,12 +39,17 @@ fn parse_functions(
                 impl_ty: *item_impl.self_ty.clone(),
                 trait_def_name: trait_def_name.clone(),
             },
-            item_fn: GeneralizedItemFn::ImplItemFn(impl_item_fn),
+            item_fn: GeneralizedItemFn::ImplItemFn(add_attrs(impl_item_fn, &attrs_item_impl)),
             sources: meta.sources.clone(),
         })
         .collect_vec()
 }
 
+fn add_attrs(mut item: ImplItemFn, attrs: &[Attribute]) -> ImplItemFn {
+    item.attrs.extend(attrs.to_owned());
+    item
+}
+
 fn parse_trait_impl(item_impl: &ItemImpl, trait_name: &str) -> HirFlatTraitImpl {
     HirFlatTraitImpl {
         trait_name: trait_name.to_owned(),

frb_codegen/src/library/codegen/parser/mir/parser/function/real/argument.rs

@@ -2,6 +2,7 @@
 use crate::codegen::ir::mir::func::{MirFuncInput, MirFuncOwnerInfo};
 use crate::codegen::ir::mir::func::{MirFuncOwnerInfoMethod, OwnershipMode};
 use crate::codegen::ir::mir::ident::MirIdent;
+use crate::codegen::ir::mir::skip::MirSkipReason;
 use crate::codegen::ir::mir::ty::boxed::MirTypeBoxed;
 use crate::codegen::ir::mir::ty::delegate::{MirTypeDelegate, MirTypeDelegateProxyEnum};
 use crate::codegen::ir::mir::ty::MirType;
@@ -56,7 +57,7 @@
 
         if ty.should_ignore(self.type_parser) {
             return Ok(FunctionPartialInfo {
-                ignore_func: true,
+                ignore_func: Some(MirSkipReason::IgnoreBecauseType),
                 ..Default::default()
             });
         }

frb_codegen/src/library/codegen/parser/mir/parser/function/real/mod.rs

@@ -5,7 +5,10 @@
     MirFunc, MirFuncArgMode, MirFuncImplMode, MirFuncImplModeDartOnly, MirFuncInput, MirFuncMode,
     MirFuncOutput, MirFuncOwnerInfo, MirFuncOwnerInfoMethod, MirFuncOwnerInfoMethodMode,
 };
-use crate::codegen::ir::mir::skip::MirSkipReason::{IgnoredFunctionGeneric, IgnoredSilently};
+use crate::codegen::ir::mir::skip::MirSkipReason::{
+    IgnoreBecauseExplicitAttribute, IgnoreBecauseFunctionGeneric, IgnoreBecauseOwnerTyShouldIgnore,
+    IgnoreSilently,
+};
 use crate::codegen::ir::mir::skip::{MirSkip, MirSkipReason};
 use crate::codegen::ir::mir::ty::delegate::MirTypeDelegate;
 use crate::codegen::ir::mir::ty::primitive::MirTypePrimitive;
@@ -27,7 +30,7 @@
 use log::{debug, warn};
 use std::fmt::Debug;
 use syn::*;
-use MirSkipReason::{IgnoredFunctionNotPub, IgnoredMisc};
+use MirSkipReason::IgnoreBecauseFunctionNotPub;
 use MirType::Primitive;
 
 pub(crate) mod argument;
@@ -115,16 +118,16 @@
         debug!("parse_function function name: {:?}", func.item_fn.name());
 
         if func.is_public() == Some(false) {
-            return Ok(create_output_skip(func, IgnoredFunctionNotPub));
+            return Ok(create_output_skip(func, IgnoreBecauseFunctionNotPub));
         }
         if !func.item_fn.sig().generics.params.is_empty() {
-            return Ok(create_output_skip(func, IgnoredFunctionGeneric));
+            return Ok(create_output_skip(func, IgnoreBecauseFunctionGeneric));
         }
 
         let src_lineno = func.item_fn.span().start().line;
         let attributes = FrbAttributes::parse(func.item_fn.attrs())?;
         if attributes.dart2rust().is_some() || attributes.rust2dart().is_some() {
-            return Ok(create_output_skip(func, IgnoredSilently));
+            return Ok(create_output_skip(func, IgnoreSilently));
         }
 
         let dart_name = parse_dart_name(&attributes, &func.item_fn.name());
@@ -140,18 +143,16 @@
         };
 
         let is_owner_trait_def = matches!(func.owner, HirFlatFunctionOwner::TraitDef { .. });
-        let owner = if let Some(owner) =
-            self.parse_owner(func, &create_context(None), dart_name.clone(), &attributes)?
-        {
-            owner
-        } else {
-            return Ok(create_output_skip(func, IgnoredMisc));
-        };
+        let owner =
+            match self.parse_owner(func, &create_context(None), dart_name.clone(), &attributes)? {
+                OwnerInfoOrSkip::Info(info) => info,
+                OwnerInfoOrSkip::Skip(reason) => return Ok(create_output_skip(func, reason)),
+            };
 
         let func_name = parse_name(&func.item_fn.name(), &owner);
 
         if attributes.ignore() {
-            return Ok(create_output_skip(func, IgnoredMisc));
+            return Ok(create_output_skip(func, IgnoreBecauseExplicitAttribute));
         }
 
         let context = create_context(Some(owner.clone()));
@@ -177,8 +178,8 @@
 
         let impl_mode = compute_impl_mode(is_owner_trait_def, &func_name, &attributes, &output);
 
-        if info.ignore_func {
-            return Ok(create_output_skip(func, IgnoredMisc));
+        if let Some(ignore_func) = info.ignore_func {
+            return Ok(create_output_skip(func, ignore_func));
         }
 
         Ok(MirFuncOrSkip::Func(MirFunc {
@@ -212,32 +213,35 @@
         context: &TypeParserParsingContext,
         actual_method_dart_name: Option<String>,
         attributes: &FrbAttributes,
-    ) -> anyhow::Result<Option<MirFuncOwnerInfo>> {
+    ) -> anyhow::Result<OwnerInfoOrSkip> {
+        use MirSkipReason::*;
+        use OwnerInfoOrSkip::*;
+
         match &func.owner {
-            HirFlatFunctionOwner::Function => Ok(Some(MirFuncOwnerInfo::Function)),
+            HirFlatFunctionOwner::Function => Ok(Info(MirFuncOwnerInfo::Function)),
             HirFlatFunctionOwner::StructOrEnum {
                 impl_ty,
                 trait_def_name,
             } => {
                 let owner_ty = if let Some(x) = self.parse_method_owner_ty(impl_ty, context)? {
                     x
                 } else {
-                    return Ok(None);
+                    return Ok(Skip(IgnoreBecauseParseMethodOwnerTy));
                 };
 
                 let trait_def = if let Some(trait_def_name) = trait_def_name {
                     if let Some(ans) = parse_type_trait(trait_def_name, self.type_parser) {
                         Some(ans)
                     } else {
                         // If cannot find the trait, we directly skip the function currently
-                        return Ok(None);
+                        return Ok(Skip(IgnoreBecauseParseOwnerCannotFindTrait));
                     }
                 } else {
                     None
                 };
 
                 if !is_allowed_owner(&owner_ty, attributes) {
-                    return Ok(None);
+                    return Ok(Skip(IgnoreBecauseNotAllowedOwner));
                 }
 
                 self.parse_method_owner_inner(func, actual_method_dart_name, owner_ty, trait_def)
@@ -263,7 +267,9 @@
         actual_method_dart_name: Option<String>,
         owner_ty: MirType,
         trait_def: Option<MirTypeTraitDef>,
-    ) -> anyhow::Result<Option<MirFuncOwnerInfo>> {
+    ) -> anyhow::Result<OwnerInfoOrSkip> {
+        use OwnerInfoOrSkip::*;
+
         let sig = func.item_fn.sig();
         let mode = if matches!(sig.inputs.first(), Some(FnArg::Receiver(..))) {
             MirFuncOwnerInfoMethodMode::Instance
@@ -272,12 +278,12 @@
         };
 
         if owner_ty.should_ignore(self.type_parser) {
-            return Ok(None);
+            return Ok(Skip(IgnoreBecauseOwnerTyShouldIgnore));
         }
 
         let actual_method_name = sig.ident.to_string();
 
-        Ok(Some(MirFuncOwnerInfo::Method(MirFuncOwnerInfoMethod {
+        Ok(Info(MirFuncOwnerInfo::Method(MirFuncOwnerInfoMethod {
             owner_ty,
             actual_method_name,
             actual_method_dart_name,
@@ -306,6 +312,11 @@
     }
 }
 
+enum OwnerInfoOrSkip {
+    Info(MirFuncOwnerInfo),
+    Skip(MirSkipReason),
+}
+
 fn create_output_skip(func: &HirFlatFunction, reason: MirSkipReason) -> MirFuncOrSkip {
     MirFuncOrSkip::Skip(MirSkip {
         name: NamespacedName::new(func.namespace.clone(), func.item_fn.name().to_string()),
@@ -342,7 +353,7 @@
     ok_output: Option<MirType>,
     error_output: Option<MirType>,
     mode: Option<MirFuncMode>,
-    ignore_func: bool,
+    ignore_func: Option<MirSkipReason>,
 }
 
 impl FunctionPartialInfo {
@@ -353,7 +364,8 @@
             error_output: merge_option(self.error_output, other.error_output)
                 .context("error_output type")?,
             mode: merge_option(self.mode, other.mode).context("mode")?,
-            ignore_func: self.ignore_func || other.ignore_func,
+            ignore_func: merge_option(self.ignore_func, other.ignore_func)
+                .context("ignore_func")?,
         })
     }
 }

frb_example/integrate_third_party/lib/src/rust/third_party/web_audio_api.dart

@@ -10,7 +10,7 @@ import 'web_audio_api/node.dart';
 import 'web_audio_api/worklet.dart';
 
 // These types are ignored because they are not used by any `pub` functions: `AtomicF32`, `AtomicF64`, `ErrorEvent`, `MediaElement`, `MessagePort`
-// These functions are ignored: `load`, `load`, `new`, `new`, `store`, `store`
+// These functions are ignored (category: IgnoreBecauseOwnerTyShouldIgnore): `load`, `load`, `new`, `new`, `store`, `store`
 
 // Rust type: RustOpaqueMoi<flutter_rust_bridge::for_generated::RustAutoOpaqueInner<AudioBuffer>>
 abstract class AudioBuffer implements RustOpaqueInterface {

frb_example/integrate_third_party/lib/src/rust/third_party/web_audio_api/media_devices.dart

@@ -8,7 +8,8 @@ import 'media_streams.dart';
 import 'package:flutter_rust_bridge/flutter_rust_bridge_for_generated.dart';
 
 // These types are ignored because they are not used by any `pub` functions: `DeviceId`, `MediaDeviceInfoKind`, `MediaDeviceInfo`, `MediaTrackConstraints`
-// These functions are ignored: `device_id`, `enumerate_devices_sync`, `group_id`, `kind`, `label`
+// These functions are ignored (category: IgnoreBecauseExplicitAttribute): `enumerate_devices_sync`
+// These functions are ignored (category: IgnoreBecauseOwnerTyShouldIgnore): `device_id`, `group_id`, `kind`, `label`
 
 /// Prompt for permission to use a media input (audio only)
 ///