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12 lines
496 B
Swift
12 lines
496 B
Swift
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/// Does nothing, but is never inlined and thus evaluating its argument will never be optimized away.
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///
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/// Useful for forcing the instantiation of lazy properties like globals.
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@inline(never)
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public func touch<Value>(_ value: Value) { /* Do nothing */ }
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/// Returns `f(x!)` if `x != nil`, or `nil` otherwise.
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public func given<T, U>(_ x: T?, _ f: (T) throws -> U) rethrows -> U? { return try x.map(f) }
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public func with<T, U>(_ x: T, _ f: (T) throws -> U) rethrows -> U { return try f(x) }
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