Golang TypeGraph.GetOperatorDefinition方法代码示例

func (itc *irgTypeConstructor) DecorateMembers(decorator typegraph.GetMemberDecorator, reporter typegraph.IssueReporter, graph *typegraph.TypeGraph) {
	for _, declaration := range itc.irg.Declarations() {
		if declaration.HasAnnotation(CONSTRUCTOR_ANNOTATION) {
			// For each constructor defined, create the intersection of their parameters.
			var parameters = make([]typegraph.TypeReference, 0)
			for constructorIndex, constructor := range declaration.GetAnnotations(CONSTRUCTOR_ANNOTATION) {
				for index, parameter := range constructor.Parameters() {
					parameterType, err := itc.ResolveType(parameter.DeclaredType(), graph)
					if err != nil {
						reporter.ReportError(parameter.GraphNode, "%v", err)
						continue
					}

					var resolvedParameterType = parameterType
					if parameter.IsOptional() {
						resolvedParameterType = resolvedParameterType.AsNullable()
					}

					if index >= len(parameters) {
						// If this is not the first constructor, then this parameter is implicitly optional
						// and therefore nullable.
						if constructorIndex > 0 {
							resolvedParameterType = resolvedParameterType.AsNullable()
						}

						parameters = append(parameters, resolvedParameterType)
					} else {
						parameters[index] = parameters[index].Intersect(resolvedParameterType)
					}
				}
			}

			// Define the construction function for the type.
			typeDecl, _ := graph.GetTypeForSourceNode(declaration.GraphNode)
			var constructorFunction = graph.FunctionTypeReference(typeDecl.GetTypeReference())
			for _, parameterType := range parameters {
				constructorFunction = constructorFunction.WithParameter(parameterType)
			}

			decorator(declaration.GetAnnotations(CONSTRUCTOR_ANNOTATION)[0].GraphNode).
				Exported(true).
				Static(true).
				ReadOnly(true).
				MemberKind(typegraph.NativeConstructorMemberSignature).
				MemberType(constructorFunction).
				Decorate()
		}

		for _, nativeOp := range declaration.GetAnnotations(NATIVE_OPERATOR_ANNOTATION) {
			opName, hasOpName := nativeOp.Value()
			if !hasOpName {
				continue
			}

			opDefinition, found := graph.GetOperatorDefinition(opName)
			if !found {
				continue
			}

			// Define the operator's member type based on the definition.
			typeDecl, _ := graph.GetTypeForSourceNode(declaration.GraphNode)

			var expectedReturnType = opDefinition.ExpectedReturnType(typeDecl.GetTypeReference())
			if expectedReturnType.HasReferredType(graph.BoolType()) {
				expectedReturnType, _ = itc.ResolveType("Boolean", graph)
			}

			var operatorType = graph.FunctionTypeReference(expectedReturnType)
			for _, parameter := range opDefinition.Parameters {
				operatorType = operatorType.WithParameter(parameter.ExpectedType(typeDecl.GetTypeReference()))
			}

			// Add the operator to the type.
			decorator(nativeOp.GraphNode).
				Native(true).
				Exported(true).
				SkipOperatorChecking(true).
				MemberType(operatorType).
				MemberKind(typegraph.NativeOperatorMemberSignature).
				Decorate()
		}

		// Add the declared members.
		for _, member := range declaration.Members() {
			declaredType, err := itc.ResolveType(member.DeclaredType(), graph)
			if err != nil {
				reporter.ReportError(member.GraphNode, "%v", err)
				continue
			}

			var memberType = declaredType
			var memberKind = typegraph.CustomMemberSignature
			var isReadonly = member.IsReadonly()

			switch member.Kind() {
			case webidl.FunctionMember:
				isReadonly = true
				memberKind = typegraph.NativeFunctionMemberSignature
				memberType = graph.FunctionTypeReference(memberType)

//.........这里部分代码省略.........

// decorateMember decorates a single type member.
func (stc *srgTypeConstructor) decorateMember(member srg.SRGMember, parent typegraph.TGTypeOrModule, decorator *typegraph.MemberDecorator, reporter typegraph.IssueReporter, graph *typegraph.TypeGraph) {
	// Add the generic's constraints.
	for _, generic := range member.Generics() {
		// Note: If the constraint is not valid, the resolve method will report the error and return Any, which is the correct type.
		constraintType, _ := stc.resolvePossibleType(generic.Node(), generic.GetConstraint, graph, reporter)
		decorator.DefineGenericConstraint(generic.Node(), constraintType)
	}

	// Build all member-specific information.
	var memberType typegraph.TypeReference = graph.AnyTypeReference()
	var memberKind typegraph.MemberSignatureKind = typegraph.CustomMemberSignature

	var isReadOnly bool = true
	var isStatic bool = false
	var isPromising bool = true
	var isImplicitlyCalled bool = false
	var hasDefaultValue bool = false
	var isField = false

	switch member.MemberKind() {
	case srg.VarMember:
		// Variables have their declared type.
		memberType, _ = stc.resolvePossibleType(member.Node(), member.DeclaredType, graph, reporter)
		memberKind = typegraph.FieldMemberSignature

		isReadOnly = false
		isPromising = false
		isField = true
		_, hasDefaultValue = member.Node().TryGetNode(parser.NodePredicateTypeFieldDefaultValue)

	case srg.PropertyMember:
		// Properties have their declared type.
		memberType, _ = stc.resolvePossibleType(member.Node(), member.DeclaredType, graph, reporter)
		memberKind = typegraph.PropertyMemberSignature

		isReadOnly = member.IsReadOnly()
		isImplicitlyCalled = true

		// Decorate the property *getter* with its return type.
		getter, found := member.Getter()
		if found {
			decorator.CreateReturnable(getter.GraphNode, memberType)
		}

	case srg.ConstructorMember:
		memberKind = typegraph.ConstructorMemberSignature

		// Constructors are static.
		isStatic = true

		// Constructors have a type of a function that returns an instance of the parent type.
		returnType := graph.NewInstanceTypeReference(parent.(typegraph.TGTypeDecl))
		functionType := graph.NewTypeReference(graph.FunctionType(), returnType)
		memberType, _ = stc.addSRGParameterTypes(member, functionType, graph, reporter)

		// Decorate the constructor with its return type.
		decorator.CreateReturnable(member.Node(), returnType)

		// Constructors have custom signature types that return 'any' to allow them to match
		// interfaces.
		var signatureType = graph.FunctionTypeReference(graph.AnyTypeReference())
		signatureType, _ = stc.addSRGParameterTypes(member, signatureType, graph, reporter)
		decorator.SignatureType(signatureType)

	case srg.OperatorMember:
		memberKind = typegraph.OperatorMemberSignature

		// Operators are read-only.
		isReadOnly = true

		// Operators have type function<DeclaredType>(parameters).
		returnType, _ := stc.resolvePossibleType(member.Node(), member.DeclaredType, graph, reporter)
		functionType := graph.NewTypeReference(graph.FunctionType(), returnType)
		memberType, _ = stc.addSRGParameterTypes(member, functionType, graph, reporter)

		// Make sure instance members under interfaces do not have bodies (and static members do).
		if parent.IsType() {
			parentType := parent.AsType()
			if parentType.TypeKind() == typegraph.ImplicitInterfaceType {
				opDef, found := graph.GetOperatorDefinition(member.Name())

				// Note: If not found, the type graph will emit an error.
				if found {
					if member.HasImplementation() != opDef.IsStatic {
						if opDef.IsStatic {
							reporter.ReportError(member.GraphNode, "Static operator %v under %v %v must have an implementation", member.Name(), parentType.Title(), parentType.Name())
						} else {
							reporter.ReportError(member.GraphNode, "Instance operator %v under %v %v cannot have an implementation", member.Name(), parentType.Title(), parentType.Name())
						}
					}
				}
			}
		}

		// Note: Operators get decorated with a returnable by the construction system automatically.

	case srg.FunctionMember:
		memberKind = typegraph.FunctionMemberSignature

//.........这里部分代码省略.........

func (itc *irgTypeConstructor) DefineMembers(builder typegraph.GetMemberBuilder, reporter typegraph.IssueReporter, graph *typegraph.TypeGraph) {
	for _, declaration := range itc.irg.Declarations() {
		// Global members get defined under their module, not their declaration.
		var parentNode = declaration.GraphNode
		if declaration.HasOneAnnotation(GLOBAL_CONTEXT_ANNOTATIONS...) {
			parentNode = declaration.Module().GraphNode
		}

		// If the declaration has one (or more) constructors, add then as a "new".
		if declaration.HasAnnotation(CONSTRUCTOR_ANNOTATION) {
			// Declare a "new" member which returns an instance of this type.
			builder(parentNode, false).
				Name("new").
				SourceNode(declaration.GetAnnotations(CONSTRUCTOR_ANNOTATION)[0].GraphNode).
				Define()
		}

		// Add support for any native operators.
		if declaration.HasOneAnnotation(GLOBAL_CONTEXT_ANNOTATIONS...) && declaration.HasAnnotation(NATIVE_OPERATOR_ANNOTATION) {
			reporter.ReportError(declaration.GraphNode, "[NativeOperator] not supported on declarations marked with [GlobalContext]")
			return
		}

		for _, nativeOp := range declaration.GetAnnotations(NATIVE_OPERATOR_ANNOTATION) {
			opName, hasOpName := nativeOp.Value()
			if !hasOpName {
				reporter.ReportError(nativeOp.GraphNode, "Missing operator name on [NativeOperator] annotation")
				continue
			}

			// Lookup the operator under the type graph.
			opDefinition, found := graph.GetOperatorDefinition(opName)
			if !found || !opDefinition.IsStatic {
				reporter.ReportError(nativeOp.GraphNode, "Unknown native operator '%v'", opName)
				continue
			}

			// Add the operator to the type.
			builder(parentNode, true).
				Name(opName).
				SourceNode(nativeOp.GraphNode).
				Define()
		}

		// Add the declared members and specializations.
		for _, member := range declaration.Members() {
			name, hasName := member.Name()
			if hasName {
				builder(parentNode, false).
					Name(name).
					SourceNode(member.GraphNode).
					Define()
			} else {
				// This is a specialization.
				specialization, _ := member.Specialization()
				builder(parentNode, true).
					Name(SPECIALIZATION_NAMES[specialization]).
					SourceNode(member.GraphNode).
					Define()
			}
		}
	}
}