static void PropertyPatternDemo() { string url = "https://devblogs.microsoft.com/dotnet/do-more-with-patterns-in-c-8-0/"; bool result = ShouldAllow(new Uri(url)); Console.WriteLine(result); } static bool ShouldAllow(Uri uri) => uri switch { { Scheme: "http", Port: 80,Host:var host} => host.Length<1000, { Scheme: "https", Port: 443 } => true, { Scheme: "ftp", Port: 21 } => true, { IsLoopback: true } => true, _ => false };
enum Seasons { Spring,Summer,Fall,Winter}; static void EnumPatternDemo() { int tp = AverageTemp(Seasons.Spring, false); Console.WriteLine(tp); } static int AverageTemp(Seasons sea, bool dayTime) => (sea, dayTime) switch { (Seasons.Spring, true) => 20, (Seasons.Spring, false) => 16, (Seasons.Summer, true) => 27, (Seasons.Summer, false) => 22, (Seasons.Fall, true) => 18, (Seasons.Fall, false) => 12, (Seasons.Winter, true) => 10, (Seasons.Winter, false) => -2, _ => throw new Exception("Unexpected combination") };
原文链接: https://www.cnblogs.com/Fred1987/p/14473425.html
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