StructDeclSyntax

Documentation

A struct declaration

An example of a struct declaration is

struct SomeStruct {
 let someMember: String
 var anotherMember: Int

 func foo() {
   print(someMember)
 }

 mutating func bar() {
   anotherMember = 42
 }
}

A struct declaration may be declared without any members.

struct EmptyStruct {

}

A struct declaration may include a type inheritance clause listing one or more protocols the struct conforms to.

The example below uses Hashable and Equatable protocols whose members are automatically synthesized by the compiler if the struct contains stored members that are themselves Hashable and Equatable.

struct AdvancedStruct: Hashable, Equatable {
 let someMember: String
 var anotherMember: Int
}

A struct declaration may include a generic parameter clause as well as a generic where clause.

struct Stack<Element> {
 var items: [Element] = []

 mutating func push(_ item: Element) {
   items.append(item)
 }

 mutating func pop() -> Element {
   return items.removeLast()
 }
}

Children

• attributes: AttributeListSyntax
• modifiers: DeclModifierListSyntax
• structKeyword: struct
• name: <identifier>
• genericParameterClause: GenericParameterClauseSyntax?
• inheritanceClause: InheritanceClauseSyntax?
• genericWhereClause: GenericWhereClauseSyntax?
• memberBlock: MemberBlockSyntax

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