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0e122544ca
Previously code completion for 'catch' pattern bound values didn't work
correctly because code completion type checker fails to type check the
value decl in the pattern.
That was because the body of the 'do' statement is not type checked, so
the thrown error is not determined, then falled backed to the default
'Never', which doesn't matches any patterns.
To resolve this, always type check the body when typechecking 'catch'
patterns. Also, pretends 'do {}' throws 'any Error' even without
any throwing expressions in the body.
rdar://126699879
155 lines
4.8 KiB
Swift
155 lines
4.8 KiB
Swift
// RUN: %target-typecheck-verify-swift
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// Test redeclaration checking in local context.
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func test1() {
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let x = 123 // expected-note{{'x' previously declared here}}
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func f() {} // expected-note{{'f()' previously declared here}}
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struct S {} // expected-note{{'S' previously declared here}}
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let x = 321 // expected-error{{invalid redeclaration of 'x'}}
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func f() {} // expected-error{{invalid redeclaration of 'f()'}}
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struct S {} // expected-error{{invalid redeclaration of 'S'}}
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}
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func test2() {
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let x = 123 // expected-warning {{never used}}
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func f() {}
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struct S {}
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do {
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let x = 321 // expected-warning {{never used}}
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func f() {}
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struct S {}
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}
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}
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func test3<T, T>(_: T, _: T) {}
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// expected-note@-1 {{'T' previously declared here}}
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// expected-error@-2 {{invalid redeclaration of 'T'}}
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// expected-error@-3 {{generic parameter 'T' is not used in function signature}}
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func test4(x: Int, x: Int) {}
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// expected-note@-1 {{'x' previously declared here}}
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// expected-error@-2 {{invalid redeclaration of 'x'}}
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struct Test4<T, T> {}
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// expected-note@-1 {{'T' previously declared here}}
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// expected-error@-2 {{invalid redeclaration of 'T'}}
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typealias Test5<T, T> = ()
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// expected-note@-1 {{'T' previously declared here}}
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// expected-error@-2 {{invalid redeclaration of 'T'}}
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enum E {
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case test6(x: Int, x: Int)
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// expected-note@-1 {{'x' previously declared here}}
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// expected-error@-2 {{invalid redeclaration of 'x'}}
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subscript(x: Int, x: Int) -> Int { return 0 }
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// expected-note@-1 {{'x' previously declared here}}
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// expected-error@-2 {{invalid redeclaration of 'x'}}
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}
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_ = { (x: Int, x: Int) in }
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// expected-note@-1 {{'x' previously declared here}}
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// expected-error@-2 {{invalid redeclaration of 'x'}}
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enum MyError : Error {
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case error(Int, Int)
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}
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func stmtTest() {
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let n: (Int, Int)? = nil
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if case (let x, let x)? = n {}
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// expected-note@-1 {{'x' previously declared here}}
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// expected-error@-2 {{invalid redeclaration of 'x'}}
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for case (let x, let x) in [(Int, Int)]() {}
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// expected-note@-1 {{'x' previously declared here}}
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// expected-error@-2 {{invalid redeclaration of 'x'}}
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switch n {
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case (let x, let x)?: _ = ()
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// expected-note@-1 {{'x' previously declared here}}
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// expected-error@-2 {{invalid redeclaration of 'x'}}
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case nil: _ = ()
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}
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while case (let x, let x)? = n {}
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// expected-note@-1 {{'x' previously declared here}}
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// expected-error@-2 {{invalid redeclaration of 'x'}}
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guard case (let x, let x)? = n else {}
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// expected-note@-1 {{'x' previously declared here}}
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// expected-error@-2 {{invalid redeclaration of 'x'}}
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do {} catch MyError.error(let x, let x) {}
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// expected-note@-1 {{'x' previously declared here}}
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// expected-error@-2 {{invalid redeclaration of 'x'}}
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// expected-warning@-3 {{unreachable}}
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}
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func fullNameTest() {
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let x = 123 // expected-warning {{never used}}
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func x() {}
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}
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// For source compatibility, allow duplicate parameter labels on
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// protocol requirements.
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protocol SillyProtocol {
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init(x: Int, x: Int)
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init(a x: Int, b x: Int)
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func foo(x: Int, x: Int)
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func foo(a x: Int, b x: Int)
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subscript(x: Int, x: Int) -> Int { get }
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subscript(a x: Int, b x: Int) -> Int { get }
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}
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// https://github.com/apple/swift/issues/63750
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let issue63750 = {
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for (x,x) in [(0,0)] {}
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// expected-error@-1 {{invalid redeclaration of 'x'}}
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// expected-note@-2 {{'x' previously declared here}}
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if case let (x,x) = (0,0) {}
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// expected-error@-1 {{invalid redeclaration of 'x'}}
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// expected-note@-2 {{'x' previously declared here}}
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switch (0,0) {
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case let (x,x):
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// expected-error@-1 {{invalid redeclaration of 'x'}}
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// expected-note@-2 {{'x' previously declared here}}
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()
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}
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func bar(_ x: Int) -> Int { x }
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if case (bar(let x), let x) = (0,0) {}
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// expected-error@-1 {{'let' binding pattern cannot appear in an expression}}
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// expected-error@-2 {{invalid redeclaration of 'x'}}
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// expected-note@-3 {{'x' previously declared here}}
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}
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func issue63750fn() {
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// Make sure the behavior is consistent with the multi-statement closure case.
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for (x,x) in [(0,0)] {}
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// expected-error@-1 {{invalid redeclaration of 'x'}}
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// expected-note@-2 {{'x' previously declared here}}
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if case let (x,x) = (0,0) {} // expected-warning {{'if' condition is always true}}
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// expected-error@-1 {{invalid redeclaration of 'x'}}
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// expected-note@-2 {{'x' previously declared here}}
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switch (0,0) {
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case let (x,x):
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// expected-error@-1 {{invalid redeclaration of 'x'}}
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// expected-note@-2 {{'x' previously declared here}}
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()
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}
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func bar(_ x: Int) -> Int { x }
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if case (bar(let x), let x) = (0,0) {}
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// expected-error@-1 {{'let' binding pattern cannot appear in an expression}}
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// expected-error@-2 {{invalid redeclaration of 'x'}}
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// expected-note@-3 {{'x' previously declared here}}
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}
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