187 lines
4.2 KiB
Markdown
187 lines
4.2 KiB
Markdown
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# Reflection System Implementation Gap Analysis
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## Current Implementation vs Dart Mirrors API
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### 1. Mirror System Gaps
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#### ✓ Implemented
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- Basic type reflection
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- Instance creation
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- Method invocation
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- Property access
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#### 🔴 Missing
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- MirrorSystem as entry point
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- Library mirror support
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- Symbol handling
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- Isolate support
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- Complete type system (void, never types)
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### 2. Core Mirrors Gaps
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#### ✓ Implemented
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- Basic DeclarationMirror features
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- Simple metadata handling
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- Owner tracking
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- Privacy checking
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#### 🔴 Missing
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- Complete DeclarationMirror hierarchy
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- Qualified name handling
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- Full metadata support
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- Source location support
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### 3. Type System Gaps
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#### ✓ Implemented
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- Basic type metadata
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- Constructor handling
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- Method reflection
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- Property reflection
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#### 🔴 Missing
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- TypeMirror hierarchy
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- Generic type support
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- Type variable handling
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- Type relationship checking
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- Original declaration tracking
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### 4. Object Mirror Gaps
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#### ✓ Implemented
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- Basic method invocation
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- Property get/set
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- Instance creation
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- Type checking
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#### 🔴 Missing
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- Symbol-based member access
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- Named argument support
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- Dynamic invocation
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- Delegate support
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### 5. Cross-Platform Gaps
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#### ✓ Implemented
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- Pure Dart implementation
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- Basic type handling
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- Platform-independent core
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#### 🔴 Missing
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- Web platform optimizations
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- Native platform support
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- Tree-shaking compatibility
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- AOT compilation support
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## Priority Implementation Areas
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### 1. MirrorSystem (High Priority)
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```dart
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abstract class MirrorSystem {
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Map<Uri, LibraryMirror> get libraries;
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LibraryMirror findLibrary(Symbol libraryName);
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IsolateMirror get isolate;
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TypeMirror get dynamicType;
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TypeMirror get voidType;
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TypeMirror get neverType;
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}
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```
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### 2. TypeMirror System (High Priority)
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```dart
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abstract class TypeMirror implements DeclarationMirror {
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bool get hasReflectedType;
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Type get reflectedType;
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List<TypeVariableMirror> get typeVariables;
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List<TypeMirror> get typeArguments;
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bool get isOriginalDeclaration;
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TypeMirror get originalDeclaration;
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bool isSubtypeOf(TypeMirror other);
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bool isAssignableTo(TypeMirror other);
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}
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```
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### 3. Library Support (Medium Priority)
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```dart
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abstract class LibraryMirror implements DeclarationMirror, ObjectMirror {
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Uri get uri;
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Map<Symbol, DeclarationMirror> get declarations;
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List<LibraryDependencyMirror> get libraryDependencies;
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}
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```
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### 4. Method Mirror (Medium Priority)
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```dart
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abstract class MethodMirror implements DeclarationMirror {
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TypeMirror get returnType;
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List<ParameterMirror> get parameters;
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bool get isAbstract;
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bool get isRegularMethod;
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bool get isOperator;
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bool get isGetter;
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bool get isSetter;
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bool get isConstructor;
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}
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```
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### 5. Variable Mirror (Medium Priority)
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```dart
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abstract class VariableMirror implements DeclarationMirror {
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TypeMirror get type;
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bool get isStatic;
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bool get isFinal;
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bool get isConst;
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}
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```
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## Implementation Strategy
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### Phase 1: Core System
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1. Implement MirrorSystem
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2. Complete DeclarationMirror hierarchy
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3. Add Symbol support
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4. Implement basic TypeMirror
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### Phase 2: Type System
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1. Complete TypeMirror implementation
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2. Add generic support
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3. Implement type relationships
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4. Add type variables
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### Phase 3: Library Support
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1. Implement LibraryMirror
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2. Add library dependencies
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3. Support library-level declarations
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4. Handle privacy scope
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### Phase 4: Platform Support
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1. Add web optimizations
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2. Implement native support
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3. Handle AOT compilation
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4. Optimize performance
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## Testing Requirements
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### 1. Unit Tests Needed
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- Mirror system tests
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- Type system tests
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- Library support tests
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- Method/variable tests
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- Cross-platform tests
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### 2. Integration Tests Needed
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- Full reflection scenarios
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- Platform compatibility
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- Performance benchmarks
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- Memory usage tests
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## Next Steps
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1. Implement MirrorSystem as entry point
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2. Complete TypeMirror hierarchy
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3. Add Symbol support
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4. Begin library mirror support
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5. Add platform optimizations
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This analysis shows the gaps between our current implementation and the Dart mirrors API. By following the mirrors API, we ensure our reflection system will provide familiar and comprehensive reflection capabilities while maintaining cross-platform support.
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