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// RUN: %target-typecheck-verify-swift
struct X { } // expected-note {{did you mean}}
// Simple examples
struct X1 {
var stored: Int
subscript(i: Int) -> Int {
get {
return stored
}
mutating
set {
stored = newValue
}
}
}
struct X2 {
var stored: Int
subscript(i: Int) -> Int {
get {
return stored + i
}
set(v) {
stored = v - i
}
}
}
struct X3 {
var stored: Int
subscript(_: Int) -> Int {
get {
return stored
}
set(v) {
stored = v
}
}
}
struct X4 {
var stored: Int
subscript(i: Int, j: Int) -> Int {
get {
return stored + i + j
}
mutating
set(v) {
stored = v + i - j
}
}
}
struct X5 {
static var stored: Int = 1
static subscript(i: Int) -> Int {
get {
return stored + i
}
set {
stored = newValue - i
}
}
}
class X6 {
static var stored: Int = 1
class subscript(i: Int) -> Int {
get {
return stored + i
}
set {
stored = newValue - i
}
}
}
struct Y1 {
var stored: Int
subscript(_: i, j: Int) -> Int { // expected-error {{cannot find type 'i' in scope}}
get {
return stored + j
}
set {
stored = j
}
}
}
// Mutating getters on constants
// https://github.com/apple/swift/issues/43457
struct Y2 {
subscript(_: Int) -> Int {
mutating get { return 0 }
}
}
// FIXME: This test case does not belong in Parse/
let y2 = Y2() // expected-note{{change 'let' to 'var' to make it mutable}}{{1-4=var}}
_ = y2[0] // expected-error{{cannot use mutating getter on immutable value: 'y2' is a 'let' constant}}
// Parsing errors
struct A0 {
subscript // expected-error {{expected '(' for subscript parameters}}
i : Int
-> Int {
get {
return stored
}
set {
stored = value
}
}
subscript -> Int { // expected-error {{expected '(' for subscript parameters}} {{12-12=()}}
return 1
}
}
struct A1 {
subscript (i : Int) // expected-error{{expected '->' for subscript element type}}
Int {
get {
return stored // expected-error{{cannot find 'stored' in scope}}
}
set {
stored = newValue// expected-error{{cannot find 'stored' in scope}}
}
}
}
struct A2 {
subscript (i : Int) -> // expected-error{{expected subscripting element type}}
{
get {
return stored
}
set {
stored = newValue // expected-error{{cannot find 'stored' in scope}}
}
}
}
struct A3 {
subscript(i : Int) // expected-error {{expected '->' for subscript element type}}
// expected-error@-1 {{expected subscripting element type}}
{
get {
return i
}
}
}
struct A4 {
subscript(i : Int) { // expected-error {{expected '->' for subscript element type}}
// expected-error@-1 {{expected subscripting element type}}
get {
return i
}
}
}
struct A5 {
subscript(i : Int) -> Int // expected-error {{expected '{' in subscript to specify getter and setter implementation}}
}
struct A6 {
subscript(i: Int)(j: Int) -> Int { // expected-error {{expected '->' for subscript element type}}
// expected-error@-1 {{function types cannot have argument labels}}
// expected-note@-2 {{did you mean}}
get {
return i + j // expected-error {{cannot find 'j' in scope}}
// expected-error@-1 {{cannot convert return expression of type 'Int' to return type '(Int) -> Int'}}
}
}
}
struct A7 {
class subscript(a: Float) -> Int { // expected-error {{class subscripts are only allowed within classes; use 'static' to declare a static subscript}} {{3-8=static}}
get {
return 42
}
}
}
class A7b {
class static subscript(a: Float) -> Int { // expected-error {{'static' cannot appear after another 'static' or 'class' keyword}} {{9-16=}}
get {
return 42
}
}
}
struct A8 {
subscript(i : Int) -> Int // expected-error{{expected '{' in subscript to specify getter and setter implementation}}
get {
return stored
}
set {
stored = value
}
}
struct A9 {
subscript x() -> Int { // expected-error {{subscripts cannot have a name}} {{13-14=}}
return 0
}
}
struct A10 {
subscript x(i: Int) -> Int { // expected-error {{subscripts cannot have a name}} {{13-14=}}
return 0
}
subscript x<T>(i: T) -> Int { // expected-error {{subscripts cannot have a name}} {{13-14=}}
return 0
}
}
struct A11 {
subscript x y : Int -> Int { // expected-error {{expected '(' for subscript parameters}}
return 0
}
}
} // expected-error{{extraneous '}' at top level}} {{1-3=}}
|
