[EE] Prettify compiler-generated field names with IDkmClrFullNameProvider.GetClrMemberName #50931
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,157 @@ | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
| // See the LICENSE file in the project root for more information. | ||
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| #nullable disable | ||
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| using System; | ||
| using System.Globalization; | ||
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| namespace Microsoft.CodeAnalysis.CSharp.Symbols | ||
| { | ||
| internal static partial class GeneratedNames | ||
| { | ||
| internal const char DotReplacementInTypeNames = '-'; | ||
| internal const string AnonymousNamePrefix = "<>f__AnonymousType"; | ||
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| internal static bool TryParseAnonymousTypeTemplateName(string name, out int index) | ||
| { | ||
| // No callers require anonymous types from net modules, | ||
| // so names with module id are ignored. | ||
| if (name.StartsWith(AnonymousNamePrefix, StringComparison.Ordinal)) | ||
| { | ||
| if (int.TryParse(name.Substring(AnonymousNamePrefix.Length), NumberStyles.None, CultureInfo.InvariantCulture, out index)) | ||
| { | ||
| return true; | ||
| } | ||
| } | ||
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| index = -1; | ||
| return false; | ||
| } | ||
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| // The type of generated name. See TryParseGeneratedName. | ||
| internal static GeneratedNameKind GetKind(string name) | ||
| { | ||
| GeneratedNameKind kind; | ||
| int openBracketOffset; | ||
| int closeBracketOffset; | ||
| return TryParseGeneratedName(name, out kind, out openBracketOffset, out closeBracketOffset) ? kind : GeneratedNameKind.None; | ||
| } | ||
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| // Parse the generated name. Returns true for names of the form | ||
| // [CS$]<[middle]>c[__[suffix]] where [CS$] is included for certain | ||
| // generated names, where [middle] and [__[suffix]] are optional, | ||
| // and where c is a single character in [1-9a-z] | ||
| // (csharp\LanguageAnalysis\LIB\SpecialName.cpp). | ||
| internal static bool TryParseGeneratedName( | ||
| string name, | ||
| out GeneratedNameKind kind, | ||
| out int openBracketOffset, | ||
| out int closeBracketOffset) | ||
| { | ||
| openBracketOffset = -1; | ||
| if (name.StartsWith("CS$<", StringComparison.Ordinal)) | ||
| { | ||
| openBracketOffset = 3; | ||
| } | ||
| else if (name.StartsWith("<", StringComparison.Ordinal)) | ||
| { | ||
| openBracketOffset = 0; | ||
| } | ||
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| if (openBracketOffset >= 0) | ||
| { | ||
| closeBracketOffset = name.IndexOfBalancedParenthesis(openBracketOffset, '>'); | ||
| if (closeBracketOffset >= 0 && closeBracketOffset + 1 < name.Length) | ||
| { | ||
| int c = name[closeBracketOffset + 1]; | ||
| if ((c >= '1' && c <= '9') || (c >= 'a' && c <= 'z')) // Note '0' is not special. | ||
| { | ||
| kind = (GeneratedNameKind)c; | ||
| return true; | ||
| } | ||
| } | ||
| } | ||
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| kind = GeneratedNameKind.None; | ||
| openBracketOffset = -1; | ||
| closeBracketOffset = -1; | ||
| return false; | ||
| } | ||
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| internal static int IndexOfBalancedParenthesis(this string str, int openingOffset, char closing) | ||
| { | ||
| char opening = str[openingOffset]; | ||
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| int depth = 1; | ||
| for (int i = openingOffset + 1; i < str.Length; i++) | ||
| { | ||
| var c = str[i]; | ||
| if (c == opening) | ||
| { | ||
| depth++; | ||
| } | ||
| else if (c == closing) | ||
| { | ||
| depth--; | ||
| if (depth == 0) | ||
| { | ||
| return i; | ||
| } | ||
| } | ||
| } | ||
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| return -1; | ||
| } | ||
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| internal static bool TryParseSourceMethodNameFromGeneratedName(string generatedName, GeneratedNameKind requiredKind, out string methodName) | ||
| { | ||
| int openBracketOffset; | ||
| int closeBracketOffset; | ||
| GeneratedNameKind kind; | ||
| if (!TryParseGeneratedName(generatedName, out kind, out openBracketOffset, out closeBracketOffset)) | ||
| { | ||
| methodName = null; | ||
| return false; | ||
| } | ||
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| if (requiredKind != 0 && kind != requiredKind) | ||
| { | ||
| methodName = null; | ||
| return false; | ||
| } | ||
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| methodName = generatedName.Substring(openBracketOffset + 1, closeBracketOffset - openBracketOffset - 1); | ||
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| if (kind.IsTypeName()) | ||
| { | ||
| methodName = methodName.Replace(DotReplacementInTypeNames, '.'); | ||
| } | ||
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| return true; | ||
| } | ||
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| // Extracts the slot index from a name of a field that stores hoisted variables or awaiters. | ||
| // Such a name ends with "__{slot index + 1}". | ||
| // Returned slot index is >= 0. | ||
| internal static bool TryParseSlotIndex(string fieldName, out int slotIndex) | ||
| { | ||
| int lastUnder = fieldName.LastIndexOf('_'); | ||
| if (lastUnder - 1 < 0 || lastUnder == fieldName.Length || fieldName[lastUnder - 1] != '_') | ||
| { | ||
| slotIndex = -1; | ||
| return false; | ||
| } | ||
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| if (int.TryParse(fieldName.Substring(lastUnder + 1), NumberStyles.None, CultureInfo.InvariantCulture, out slotIndex) && slotIndex >= 1) | ||
| { | ||
| slotIndex--; | ||
| return true; | ||
| } | ||
|
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| slotIndex = -1; | ||
| return false; | ||
| } | ||
| } | ||
| } | ||
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Is it necessary to move these methods to a separate file? Moving the methods makes it difficult to track changes.It looks like it is necessary to move the methods to allow including this file in ResultProvider.csproj.
Comparing this file with the previous version, it looks like the only change is including
IndexOfBalancedParenthesis().