protected virtual IEnumerable <ParameterSymbol> CreateParameters(IEnumerable <ParameterSymbol> baseparams) { int index = 0; // Context <ctx> yield return(new SpecialParameterSymbol(this, DeclaringCompilation.CoreTypes.Context, SpecialParameterSymbol.ContextName, index++)); if (IsInitFieldsOnly) { // DummyFieldsOnlyCtor _ yield return(new SpecialParameterSymbol(this, DeclaringCompilation.CoreTypes.DummyFieldsOnlyCtor, "_", index++)); } // same parameters as PHP constructor foreach (var p in baseparams) { if (SpecialParameterSymbol.IsContextParameter(p)) { continue; } if (SpecialParameterSymbol.IsDummyFieldsOnlyCtorParameter(p)) { continue; } yield return(SynthesizedParameterSymbol.Create(this, p, index++)); } }
protected virtual IEnumerable <ParameterSymbol> CreateParameters(IEnumerable <ParameterSymbol> baseparams) { int index = 0; // Context <ctx> yield return(new SpecialParameterSymbol(this, DeclaringCompilation.CoreTypes.Context, SpecialParameterSymbol.ContextName, index++)); if (IsInitFieldsOnly) { // QueryValue<DummyFieldsOnlyCtor> _ var dummy = DeclaringCompilation.CoreTypes.QueryValue_T.Symbol.Construct(DeclaringCompilation.CoreTypes.QueryValue_DummyFieldsOnlyCtor); yield return(new SpecialParameterSymbol(this, dummy, "_", index++)); } // same parameters as PHP constructor foreach (var p in baseparams) { if (SpecialParameterSymbol.IsContextParameter(p)) { continue; } if (SpecialParameterSymbol.IsQueryValueParameter(p, out var _, out var t) && t == SpecialParameterSymbol.QueryValueTypes.DummyFieldsOnlyCtor) { continue; } yield return(SynthesizedParameterSymbol.Create(this, p, index++)); } }
/// <summary> /// Collects methods that has to be overriden and matches with this declaration. /// Missing overrides are reported, needed ghost stubs are synthesized. /// </summary> public void FinalizeMethodTable(Emit.PEModuleBuilder module, DiagnosticBag diagnostics) { // creates ghost stubs for overrides that do not match the signature foreach (var info in this.ResolveOverrides(diagnostics)) { // note: unresolved abstracts already reported by ResolveOverrides // is ghost stub needed? if (ReferenceEquals(info.OverrideCandidate?.ContainingType, this) || // candidate not matching exactly the signature in this type info.ImplementsInterface) // explicitly implement the interface { if (info.HasOverride) { if (info.ImplementsInterface && info.Override != null && info.Override.IsVirtual) { // create explicit override only if the interface method is implemented with a class method that does not implement the interface /* * interface I { foo } // METHOD * class X { foo } // OVERRIDE * class Y : X, I { explicit I.foo override } // GHOST */ if (info.Override.ContainingType.ImplementsInterface(info.Method.ContainingType)) { /* => X implements I */ // explicit method override is not needed continue; } } /* * class A { * TReturn1 foo(A, B); * } * class B : A { * TReturn2 foo(A2, B2); * * // SYNTHESIZED GHOST: * override TReturn foo(A, B){ return (TReturn)foo((A2)A, (B2)B); * } */ // override method with a ghost that calls the override (info.Override ?? info.OverrideCandidate).CreateGhostOverload( this, module, diagnostics, info.Method.ReturnType, info.Method.Parameters, phphidden: true, explicitOverride: info.Method); } else { // synthesize abstract method implementing unresolved interface member if (info.IsUnresolvedAbstract && info.ImplementsInterface && this.IsAbstract && !this.IsInterface) { var method = info.Method; Debug.Assert(!method.IsStatic); Debug.Assert(method.DeclaredAccessibility != Accessibility.Private); Debug.Assert(method.ContainingType.IsInterface); // Template: abstract function {name}({parameters}) var ghost = new SynthesizedMethodSymbol(this, method.RoutineName, isstatic: false, isvirtual: true, isabstract: true, isfinal: false, returnType: method.ReturnType, accessibility: method.DeclaredAccessibility); ghost.SetParameters(method.Parameters.Select(p => SynthesizedParameterSymbol.Create(ghost, p)).ToArray()); module.SynthesizedManager.AddMethod(this, ghost); } } } // setup synthesized methods explicit override as resolved if (info.Override is SynthesizedMethodSymbol sm && sm.ExplicitOverride == null && sm.ContainingType == this) { sm.ExplicitOverride = info.Method; } } // synthesized field accessors: foreach (var srcf in GetMembers().OfType <SourceFieldSymbol>()) { var paccessor = srcf.FieldAccessorProperty; if (paccessor != null) { GenerateFieldAccessorProperty(module, diagnostics, srcf, paccessor); } } }
/// <summary> /// Matches all methods that can be overriden (non-static, public or protected, abstract or virtual) /// within this type sub-tree (this type, its base and interfaces) /// with its override. /// Methods without an override are either abstract or a ghost stup has to be synthesized. /// </summary> /// <param name="diagnostics"></param> internal OverrideInfo[] ResolveOverrides(DiagnosticBag diagnostics) { if (_lazyOverrides != null) { // already resolved return(_lazyOverrides); } // inherit abstracts from base type // ignoring System.Object (we don't override its methods from PHP) var overrides = new List <OverrideInfo>(); if (BaseType != null && BaseType.SpecialType != SpecialType.System_Object) { overrides.AddRange(BaseType.ResolveOverrides(diagnostics)); } // collect this type declared methods including synthesized methods var members = this.GetMembers(); // resolve overrides of inherited members for (int i = 0; i < overrides.Count; i++) { var m = overrides[i]; if (m.HasOverride == false) { // update override info of the inherited member overrides[i] = new OverrideInfo(m.Method, OverrideHelper.ResolveMethodImplementation(m.Method, members)); } else { // clear the interface flag of inherited override info m.ImplementsInterface = false; overrides[i] = m; } } // resolve overrides of interface methods foreach (var iface in Interfaces) { // skip interfaces implemented by base type or other interfaces, // we don't want to add redundant override entries: if ((BaseType != null && BaseType.ImplementsInterface(iface)) || Interfaces.Any(x => x != iface && x.ImplementsInterface(iface))) { // iface is already handled within overrides => skip // note: iface can be ignored in metadata at all actually continue; } var iface_abstracts = iface.ResolveOverrides(diagnostics); foreach (var m in iface_abstracts) { if (BaseType != null && m.Method.ContainingType != iface && BaseType.ImplementsInterface(m.Method.ContainingType)) { // iface {m.Method.ContainingType} already handled within overrides => skip continue; } // ignore interface method that is already implemented: if (overrides.Any(o => OverrideHelper.SignaturesMatch(o.Method, m.Method))) { continue; } // add interface member, // resolve its override overrides.Add(new OverrideInfo(m.Method, this.IsInterface ? null : OverrideHelper.ResolveMethodImplementation(m.Method, this)) { ImplementsInterface = true }); } } // add overrideable routines from this type foreach (var s in members) { if (s is MethodSymbol m && m.IsOverrideable()) { overrides.Add(new OverrideInfo(m)); } } // handle unresolved abstracts for (int i = 0; i < overrides.Count; i++) { var m = overrides[i]; if (m.IsUnresolvedAbstract && this is SourceTypeSymbol srct && !this.IsInterface) { if (!this.IsAbstract) { // Class '{0}' doesn't implement abstract method {1}::{2}() diagnostics.Add(DiagnosticBagExtensions.ParserDiagnostic(srct.ContainingFile.SyntaxTree, srct.Syntax.HeadingSpan, Devsense.PHP.Errors.Errors.AbstractMethodNotImplemented, srct.FullName.ToString(), ((IPhpTypeSymbol)m.Method.ContainingType).FullName.ToString(), m.RoutineName)); } else if (m.ImplementsInterface /*&& this.IsAbstract*/) { m.ImplementsInterface = false; var method = m.Method; Debug.Assert(!method.IsStatic); Debug.Assert(method.DeclaredAccessibility != Accessibility.Private); Debug.Assert(method.ContainingType.IsInterface); // Template: abstract function {name}({parameters}) var ghost = new SynthesizedMethodSymbol(this, method.RoutineName, isstatic: false, isvirtual: true, isabstract: true, isfinal: false, returnType: method.ReturnType, accessibility: method.DeclaredAccessibility); ghost.SetParameters(SynthesizedParameterSymbol.Create(ghost, method.Parameters)); //module.SynthesizedManager.AddMethod(this, ghost); // will be added to synthesized manager by FinalizeMethodTable m.Method = ghost; // replace the interface method with synthesized abstract method // update overrides overrides[i] = m; } } } // cache & return return(_lazyOverrides = overrides.ToArray()); }