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Add support for C# 11 and newer versions
If a langversion is explicitly provided, use it verbatim. The compiler will check validity and emit and error if needed. Otherwise, use the C# language version known to be supported by the current runtime, as we may be using csc/Roslyn from a newer runtime where the "latest" language features depend on new APIs that aren't available on the current runtime. If we do not have a language version mapping for the runtime, use "latest" so all its language features are available until we add the version mapping. Fix #166 - Support for C# 11
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26 changes: 26 additions & 0 deletions
26
Mono.TextTemplating/Mono.TextTemplating.CodeCompilation/CSharpLangVersion.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| // Copyright (c) Microsoft. All rights reserved. | ||
| // Licensed under the MIT license. See LICENSE file in the project root for full license information. | ||
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| #if NETFRAMEWORK | ||
| #nullable enable annotations | ||
| #else | ||
| #nullable enable | ||
| #endif | ||
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| namespace Mono.TextTemplating.CodeCompilation; | ||
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| enum CSharpLangVersion | ||
| { | ||
| v5_0, | ||
| v6_0, | ||
| v7_0, | ||
| v7_1, | ||
| v7_2, | ||
| v7_3, | ||
| v8_0, | ||
| v9_0, | ||
| v10_0, | ||
| v11_0, | ||
| v12_0, | ||
| Latest = 1024 // make sure value doesn't change as we add new C# versions | ||
| } |
141 changes: 65 additions & 76 deletions
141
Mono.TextTemplating/Mono.TextTemplating.CodeCompilation/CSharpLangVersionHelper.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,90 +1,79 @@ | ||
| // Copyright (c) Microsoft. All rights reserved. | ||
| // Licensed under the MIT license. See LICENSE file in the project root for full license information. | ||
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| #if NETFRAMEWORK | ||
| #nullable enable annotations | ||
| #else | ||
| #nullable enable | ||
| #endif | ||
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| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
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| namespace Mono.TextTemplating.CodeCompilation | ||
| { | ||
| enum CSharpLangVersion | ||
| { | ||
| v5_0, | ||
| v6_0, | ||
| v7_0, | ||
| v7_1, | ||
| v7_2, | ||
| v7_3, | ||
| v8_0, | ||
| v9_0, | ||
| Latest | ||
| } | ||
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| static class CSharpLangVersionHelper | ||
| { | ||
| public static CSharpLangVersion GetBestSupportedLangVersion (RuntimeInfo runtime, CSharpLangVersion? compilerLangVersion = null) | ||
| => (CSharpLangVersion)Math.Min ((int)(compilerLangVersion ?? runtime.MaxSupportedLangVersion), (int) (runtime switch { | ||
| { Kind: RuntimeKind.NetCore, Version.Major: > 5 } => CSharpLangVersion.Latest, | ||
| { Kind: RuntimeKind.NetCore, Version.Major: 5 } => CSharpLangVersion.v9_0, | ||
| { Kind: RuntimeKind.NetCore, Version.Major: 3 } => CSharpLangVersion.v8_0, | ||
| _ => CSharpLangVersion.v7_3, | ||
| })); | ||
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| static bool HasLangVersionArg (string args) => | ||
| !string.IsNullOrEmpty(args) | ||
| && (args.IndexOf ("langversion", StringComparison.OrdinalIgnoreCase) > -1) | ||
| && ProcessArgumentBuilder.TryParse (args, out var parsedArgs) | ||
| && parsedArgs.Any (a => a.IndexOf ("langversion", StringComparison.OrdinalIgnoreCase) == 1); | ||
| namespace Mono.TextTemplating.CodeCompilation; | ||
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| static string ToString (CSharpLangVersion version) => version switch { | ||
| CSharpLangVersion.v5_0 => "5", | ||
| CSharpLangVersion.v6_0 => "6", | ||
| CSharpLangVersion.v7_0 => "7", | ||
| CSharpLangVersion.v7_1 => "7.1", | ||
| CSharpLangVersion.v7_2 => "7.2", | ||
| CSharpLangVersion.v7_3 => "7.3", | ||
| CSharpLangVersion.v8_0 => "8.0", | ||
| CSharpLangVersion.v9_0 => "9.0", | ||
| CSharpLangVersion.Latest => "latest", | ||
| _ => throw new ArgumentException ($"Not a valid value: '{version}'", nameof (version)) | ||
| }; | ||
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| public static string GetLangVersionArg (CodeCompilerArguments arguments, RuntimeInfo runtime) | ||
| { | ||
| if (!string.IsNullOrWhiteSpace (arguments.LangVersion)) { | ||
| return $"-langversion:{arguments.LangVersion}"; | ||
| } | ||
| static class CSharpLangVersionHelper | ||
| { | ||
| public static bool HasLangVersionArg (string args) => | ||
| !string.IsNullOrEmpty(args) | ||
| && (args.IndexOf ("langversion", StringComparison.OrdinalIgnoreCase) > -1) | ||
| && ProcessArgumentBuilder.TryParse (args, out var parsedArgs) | ||
| && parsedArgs.Any (IsLangVersionArg); | ||
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| if (HasLangVersionArg (arguments.AdditionalArguments)) { | ||
| return null; | ||
| } | ||
| public static bool IsLangVersionArg (string arg) => | ||
| (arg[0] == '-' || arg[0] == '/') | ||
| && arg.IndexOf ("langversion", StringComparison.OrdinalIgnoreCase) == 1; | ||
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| return $"-langversion:{ToString(GetBestSupportedLangVersion(runtime))}"; | ||
| public static string? GetLangVersionArg (CodeCompilerArguments arguments, RuntimeInfo runtime) | ||
| { | ||
| // Arguments.LangVersion takes precedence over -langversion in arguments.AdditionalArguments. | ||
| // This behavior should match that of CscCodeCompiler.CompileFile and RoslynCodeCompiler.CompileFileInternal | ||
| if (!string.IsNullOrWhiteSpace (arguments.LangVersion)) { | ||
| return $"-langversion:{arguments.LangVersion}"; | ||
| } | ||
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| public static CSharpLangVersion? FromRoslynPackageVersion (string roslynPackageVersion) | ||
| => SemVersion.TryParse (roslynPackageVersion, out var version) | ||
| ? version switch { | ||
| { Major: > 3 } => CSharpLangVersion.v9_0, | ||
| { Major: 3, Minor: >= 8 } => CSharpLangVersion.v9_0, | ||
| { Major: 3, Minor: >= 3 } => CSharpLangVersion.v8_0, | ||
| // ignore 8.0 preview support in 3.0-3.2 | ||
| { Major: 2, Minor: >= 8 } => CSharpLangVersion.v7_3, | ||
| { Major: 2, Minor: >= 6 } => CSharpLangVersion.v7_2, | ||
| { Major: 2, Minor: >= 3 } => CSharpLangVersion.v7_1, | ||
| { Major: 2 } => CSharpLangVersion.v7_0, | ||
| _ => CSharpLangVersion.v6_0 | ||
| } | ||
| : null; | ||
| if (HasLangVersionArg (arguments.AdditionalArguments)) { | ||
| return null; | ||
| } | ||
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| //https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-version-history | ||
| public static CSharpLangVersion FromNetCoreSdkVersion (SemVersion sdkVersion) | ||
| => sdkVersion switch { | ||
| { Major: >= 5 } => CSharpLangVersion.v9_0, | ||
| { Major: 3 } => CSharpLangVersion.v8_0, | ||
| { Major: 2, Minor: >= 1 } => CSharpLangVersion.v7_3, | ||
| { Major: 2, Minor: >= 0 } => CSharpLangVersion.v7_1, | ||
| _ => CSharpLangVersion.v7_0 | ||
| }; | ||
| // Default to the highest language version supported by the runtime | ||
| // as we may be using a csc from a newer runtime where "latest" language | ||
| // features depend on new APIs that aren't available on the current runtime. | ||
| // If we were unable to determine the supported language version for the runtime, | ||
| // its MaxSupportedLangVersion will default to "Latest" so its language features | ||
| // are available before we add a language version mapping for that runtime version. | ||
| return $"-langversion:{ToString (runtime.MaxSupportedLangVersion)}"; | ||
| } | ||
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| //https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-version-history | ||
| public static CSharpLangVersion FromNetCoreSdkVersion (SemVersion sdkVersion) | ||
| => sdkVersion switch { | ||
| { Major: 8 } => CSharpLangVersion.v12_0, | ||
| { Major: 7 } => CSharpLangVersion.v11_0, | ||
| { Major: 6 } => CSharpLangVersion.v10_0, | ||
| { Major: 5 } => CSharpLangVersion.v9_0, | ||
| { Major: 3 } => CSharpLangVersion.v8_0, | ||
| { Major: 2, Minor: >= 1 } => CSharpLangVersion.v7_3, | ||
| { Major: 2, Minor: >= 0 } => CSharpLangVersion.v7_1, | ||
| { Major: 1 } => CSharpLangVersion.v7_1, | ||
| // for unknown versions, always fall through to "Latest" so we don't break the | ||
| // ability to use new C# versions as they are released | ||
| _ => CSharpLangVersion.Latest | ||
| }; | ||
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| public static string ToString (CSharpLangVersion version) => version switch { | ||
| CSharpLangVersion.v5_0 => "5", | ||
| CSharpLangVersion.v6_0 => "6", | ||
| CSharpLangVersion.v7_0 => "7", | ||
| CSharpLangVersion.v7_1 => "7.1", | ||
| CSharpLangVersion.v7_2 => "7.2", | ||
| CSharpLangVersion.v7_3 => "7.3", | ||
| CSharpLangVersion.v8_0 => "8.0", | ||
| CSharpLangVersion.v9_0 => "9.0", | ||
| CSharpLangVersion.v10_0 => "10.0", | ||
| CSharpLangVersion.v11_0 => "11.0", | ||
| CSharpLangVersion.v12_0 => "12.0", | ||
| CSharpLangVersion.Latest => "latest", | ||
| _ => throw new ArgumentException ($"Not a valid value: '{version}'", nameof (version)) | ||
| }; | ||
| } |
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