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98 lines
3.1 KiB
98 lines
3.1 KiB
using System.Linq; |
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using System.Text; |
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using Microsoft.CodeAnalysis; |
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using Microsoft.CodeAnalysis.CSharp; |
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namespace gaemstone.SourceGen.Utility; |
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public static class SymbolExtensions |
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{ |
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public static bool IsNullable(this ITypeSymbol type) => type.IsValueType |
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? (type.OriginalDefinition?.SpecialType == SpecialType.System_Nullable_T) |
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: (type.NullableAnnotation == NullableAnnotation.Annotated); |
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public static bool IsPrimitiveType(this ITypeSymbol symbol) |
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=> symbol.SpecialType switch { |
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SpecialType.System_Boolean or |
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SpecialType.System_SByte or |
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SpecialType.System_Int16 or |
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SpecialType.System_Int32 or |
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SpecialType.System_Int64 or |
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SpecialType.System_Byte or |
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SpecialType.System_UInt16 or |
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SpecialType.System_UInt32 or |
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SpecialType.System_UInt64 or |
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SpecialType.System_Single or |
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SpecialType.System_Double or |
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SpecialType.System_Char or |
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SpecialType.System_String or |
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SpecialType.System_Object => true, |
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_ => false, |
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}; |
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public static string GetFullName( |
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this ISymbol symbol, FullNameStyle style = FullNameStyle.Full) |
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{ |
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var builder = new StringBuilder(); |
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AppendFullName(symbol, builder, style); |
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return builder.ToString(); |
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} |
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public static void AppendFullName( |
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this ISymbol symbol, StringBuilder builder, |
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FullNameStyle style = FullNameStyle.Full) |
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{ |
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var withGeneric = (style != FullNameStyle.NoGeneric); |
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var withMetadata = (style == FullNameStyle.Metadata); |
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if ((symbol.Kind != SymbolKind.TypeParameter) |
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&& (symbol.ContainingSymbol is ISymbol parent) |
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&& (parent is not INamespaceSymbol { IsGlobalNamespace: true })) |
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{ |
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AppendFullName(parent, builder, style); |
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builder.Append((withMetadata && (parent is ITypeSymbol)) ? '+' : '.'); |
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} |
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if ((symbol is INamedTypeSymbol { IsGenericType: true } typeSymbol) |
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&& !(withGeneric && withMetadata)) |
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{ |
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var length = symbol.MetadataName.IndexOf('`'); |
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builder.Append(symbol.MetadataName, 0, length); |
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if (withGeneric) { |
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builder.Append('<'); |
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foreach (var arg in typeSymbol.TypeArguments) { |
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AppendFullName(arg, builder, style); |
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builder.Append(','); |
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} |
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builder.Length--; // Remove the last ',' character. |
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builder.Append('>'); |
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} |
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} |
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else builder.Append(symbol.MetadataName); |
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} |
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public static string? GetNamespace(this ISymbol symbol) |
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=> symbol.ContainingNamespace?.GetFullName(); |
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public static bool HasAttribute(this ISymbol symbol, string name, |
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FullNameStyle matchStyle = FullNameStyle.Metadata) |
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=> symbol.GetAttributes().Any(attr => |
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attr.AttributeClass!.GetFullName(matchStyle) == name); |
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public static AttributeData? FindAttribute(this ISymbol symbol, string name, |
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FullNameStyle matchStyle = FullNameStyle.Metadata) |
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=> symbol.GetAttributes().FirstOrDefault(attr => |
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attr.AttributeClass!.GetFullName(matchStyle) == name); |
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public static string ToStringLiteral(this string? input) |
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=> (input != null) ? SyntaxFactory.LiteralExpression(SyntaxKind.StringLiteralExpression, |
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SyntaxFactory.Literal(input)).ToFullString() : "null"; |
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} |
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public enum FullNameStyle |
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{ |
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Full, // Namespace.Foo.Bar<Baz<Quux>> |
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Metadata, // Namespace.Foo+Bar`1 |
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NoGeneric, // Namespace.Foo.Bar |
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}
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