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// RUN: %target-typecheck-verify-swift -disable-availability-checking
// UNSUPPORTED: OS=windows-msvc
// Line-feeds in Fix-Its fail to check on Windows.
@resultBuilder
struct Maker {} // expected-error {{result builder must provide at least one static 'buildBlock' method}}{{15-15=\n static func buildBlock(_ components: <#Component#>...) -> <#Component#> {\n <#code#>\n \}}}
@resultBuilder
struct TupleBuilderWithoutIf { // expected-note 3{{struct 'TupleBuilderWithoutIf' declared here}}
// expected-note@-1{{add 'buildOptional(_:)' to the result builder 'TupleBuilderWithoutIf' to add support for 'if' statements without an 'else'}}{{31-31=\n static func buildOptional(_ component: <#Component#>?) -> <#Component#> {\n <#code#>\n \}}}
// expected-note@-2{{add 'buildEither(first:)' and 'buildEither(second:)' to the result builder 'TupleBuilderWithoutIf' to add support for 'if'-'else' and 'switch'}}{{31-31=\n static func buildEither(first component: <#Component#>) -> <#Component#> {\n <#code#>\n \}\n\n static func buildEither(second component: <#Component#>) -> <#Component#> {\n <#code#>\n \}}}
// expected-note@-3{{add 'buildArray(_:)' to the result builder 'TupleBuilderWithoutIf' to add support for 'for'..'in' loops}}{{31-31=\n static func buildArray(_ components: [<#Component#>]) -> <#Component#> {\n <#code#>\n \}}}
static func buildBlock() -> () { }
static func buildBlock<T1>(_ t1: T1) -> T1 {
return t1
}
static func buildBlock<T1, T2>(_ t1: T1, _ t2: T2) -> (T1, T2) {
return (t1, t2)
}
static func buildBlock<T1, T2, T3>(_ t1: T1, _ t2: T2, _ t3: T3)
-> (T1, T2, T3) {
return (t1, t2, t3)
}
static func buildBlock<T1, T2, T3, T4>(_ t1: T1, _ t2: T2, _ t3: T3, _ t4: T4)
-> (T1, T2, T3, T4) {
return (t1, t2, t3, t4)
}
static func buildBlock<T1, T2, T3, T4, T5>(
_ t1: T1, _ t2: T2, _ t3: T3, _ t4: T4, _ t5: T5
) -> (T1, T2, T3, T4, T5) {
return (t1, t2, t3, t4, t5)
}
}
func tuplifyWithoutIf<T>(_ cond: Bool, @TupleBuilderWithoutIf body: (Bool) -> T) {
print(body(cond))
}
func testDiags() {
// Statements unsupported by the particular builder.
tuplifyWithoutIf(true) {
if $0 { // expected-error{{closure containing control flow statement cannot be used with result builder 'TupleBuilderWithoutIf'}}
"hello"
}
}
tuplifyWithoutIf(true) {
if $0 { // expected-error{{closure containing control flow statement cannot be used with result builder 'TupleBuilderWithoutIf'}}
"hello"
} else {
}
}
tuplifyWithoutIf(true) { a in
for x in 0..<100 { // expected-error{{closure containing control flow statement cannot be used with result builder 'TupleBuilderWithoutIf'}}
x
}
}
}
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