Golang TypeGraph.AnyTypeReference方法代码示例

// resolvePossibleType calls the specified type getter function and, if found, attempts to resolve it.
// Returns a reference to the resolved type or Any if the getter returns false.
func (stc *srgTypeConstructor) resolvePossibleType(sourceNode compilergraph.GraphNode, getter typeGetter, tdg *typegraph.TypeGraph, reporter typegraph.IssueReporter) (typegraph.TypeReference, bool) {
	srgTypeRef, found := getter()
	if !found {
		return tdg.AnyTypeReference(), true
	}

	resolvedTypeRef, err := stc.BuildTypeRef(srgTypeRef, tdg)
	if err != nil {
		reporter.ReportError(sourceNode, "%s", err.Error())
		return tdg.AnyTypeReference(), false
	}

	return resolvedTypeRef, true
}

// ResolveType attempts to resolve the given type string.
func (itc *irgTypeConstructor) ResolveType(typeString string, graph *typegraph.TypeGraph) (typegraph.TypeReference, error) {
	if typeString == "any" {
		return graph.AnyTypeReference(), nil
	}

	if typeString == "void" {
		return graph.VoidTypeReference(), nil
	}

	var nullable = false
	if strings.HasSuffix(typeString, "?") {
		nullable = true
		typeString = typeString[0 : len(typeString)-1]
	}

	// Perform native type mapping.
	if found, ok := NATIVE_TYPES[typeString]; ok {
		typeString = found
	}

	declaration, hasDeclaration := itc.irg.FindDeclaration(typeString)
	if !hasDeclaration {
		return graph.AnyTypeReference(), fmt.Errorf("Could not find WebIDL type %v", typeString)
	}

	typeDecl, hasType := graph.GetTypeForSourceNode(declaration.GraphNode)
	if !hasType {
		panic("Type not found for WebIDL type declaration")
	}

	typeRef := typeDecl.GetTypeReference()
	if nullable {
		return typeRef.AsNullable(), nil
	}

	return typeRef, nil
}

// 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 (trr *TypeReferenceResolver) resolveTypeRef(typeref srg.SRGTypeRef, tdg *typegraph.TypeGraph) (typegraph.TypeReference, error) {
	switch typeref.RefKind() {
	case srg.TypeRefVoid:
		return tdg.VoidTypeReference(), nil

	case srg.TypeRefAny:
		return tdg.AnyTypeReference(), nil

	case srg.TypeRefStruct:
		return tdg.StructTypeReference(), nil

	case srg.TypeRefMapping:
		innerType, err := trr.ResolveTypeRef(typeref.InnerReference(), tdg)
		if err != nil {
			return tdg.AnyTypeReference(), err
		}

		return tdg.NewTypeReference(tdg.MappingType(), innerType), nil

	case srg.TypeRefSlice:
		innerType, err := trr.ResolveTypeRef(typeref.InnerReference(), tdg)
		if err != nil {
			return tdg.AnyTypeReference(), err
		}

		return tdg.NewTypeReference(tdg.SliceType(), innerType), nil

	case srg.TypeRefStream:
		innerType, err := trr.ResolveTypeRef(typeref.InnerReference(), tdg)
		if err != nil {
			return tdg.AnyTypeReference(), err
		}

		return tdg.NewTypeReference(tdg.StreamType(), innerType), nil

	case srg.TypeRefNullable:
		innerType, err := trr.ResolveTypeRef(typeref.InnerReference(), tdg)
		if err != nil {
			return tdg.AnyTypeReference(), err
		}

		return innerType.AsNullable(), nil

	case srg.TypeRefPath:
		// Resolve the package type for the type ref.
		resolvedTypeInfo, found := typeref.ResolveType()
		if !found {
			sourceError := compilercommon.SourceErrorf(typeref.Location(),
				"Type '%s' could not be found",
				typeref.ResolutionPath())

			return tdg.AnyTypeReference(), sourceError
		}

		// If the type information refers to an SRG type or generic, find the node directly
		// in the type graph.
		var constructedRef = tdg.AnyTypeReference()
		if !resolvedTypeInfo.IsExternalPackage {
			// Get the type in the type graph.
			resolvedType, hasResolvedType := tdg.GetTypeForSourceNode(resolvedTypeInfo.ResolvedType.Node())
			if !hasResolvedType {
				panic(fmt.Sprintf("Could not find typegraph type for SRG type %v", resolvedTypeInfo.ResolvedType.Name()))
			}

			constructedRef = tdg.NewTypeReference(resolvedType)
		} else {
			// Otherwise, we search for the type in the type graph based on the package from which it
			// was imported.
			resolvedType, hasResolvedType := tdg.ResolveTypeUnderPackage(resolvedTypeInfo.ExternalPackageTypePath, resolvedTypeInfo.ExternalPackage)
			if !hasResolvedType {
				sourceError := compilercommon.SourceErrorf(typeref.Location(),
					"Type '%s' could not be found",
					typeref.ResolutionPath())

				return tdg.AnyTypeReference(), sourceError
			}

			constructedRef = tdg.NewTypeReference(resolvedType)
		}

		// Add the generics.
		if typeref.HasGenerics() {
			for _, srgGeneric := range typeref.Generics() {
				genericTypeRef, err := trr.ResolveTypeRef(srgGeneric, tdg)
				if err != nil {
					return tdg.AnyTypeReference(), err
				}

				constructedRef = constructedRef.WithGeneric(genericTypeRef)
			}
		}

		// Add the parameters.
		if typeref.HasParameters() {
			for _, srgParameter := range typeref.Parameters() {
				parameterTypeRef, err := trr.ResolveTypeRef(srgParameter, tdg)
				if err != nil {
					return tdg.AnyTypeReference(), err
				}
				constructedRef = constructedRef.WithParameter(parameterTypeRef)
//.........这里部分代码省略.........