ILSpy

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Christoph Wille fe9f6db3ee Emit C# 7.1 default literals where the context supplies the type Shortening default(T) is the same problem as removing the redundant cast around a lambda whose delegate type the context already fixes, so it uses the same mechanism: ConvertTo makes the explicit type implicit when the conversion is an identity conversion and the caller allows an implicit one. The literal keeps the type it was shortened from, so any later conversion to a different type - or any context that requires an explicit type, such as an overload resolution recheck falling back to CastArguments - can spell default(T) out again. That keeps the value intact where the bare literal would change it, e.g. "object o = default(SomeStruct)", which boxes a non-null struct while "default" would be null. Because the shortened literal resolves to DefaultLiteralResolveResult, CallBuilder's existing overload resolution recheck sees a real default literal and rejects ambiguous calls on its own; no separate bookkeeping about which arguments may stay untyped is needed. Only the contexts that supply no target type at all restore the explicit form: an awaited expression, and arguments of operator methods, which later become operator or cast syntax rather than calls. Assisted-by: Claude:claude-opus-5[1m]:Claude Code		4 weeks ago
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AddCheckedBlocks.cs	…
AddXmlDocumentationTransform.cs	Show the owning property's documentation for accessor methods	2 months ago
CombineQueryExpressions.cs	Move the remaining ResolveResult subclasses into the Semantics namespace	1 month ago
ContextTrackingVisitor.cs	…
CustomPatterns.cs	…
DeclareVariables.cs	Emit C# 7.1 default literals where the context supplies the type	4 weeks ago
EscapeInvalidIdentifiers.cs	Fix #3624 : decompile semi-auto properties with the C# 14 field keyword	1 month ago
FixNameCollisions.cs	…
FlattenSwitchBlocks.cs	Add license headers to source files that lacked them	2 months ago
IAstTransform.cs	…
IntroduceExtensionMethods.cs	Move UsingScope and CSharpTypeResolveContext into the type system	1 month ago
IntroduceQueryExpressions.cs	Fix #3352 : avoid using query expressions if there's indications that the lambda parameter types cannot be omitted.	4 weeks ago
IntroduceUnsafeModifier.cs	Move the remaining ResolveResult subclasses into the Semantics namespace	1 month ago
IntroduceUsingDeclarations.cs	Move UsingScope and CSharpTypeResolveContext into the type system	1 month ago
NormalizeBlockStatements.cs	Add license headers to source files that lacked them	2 months ago
PatternStatementTransform.cs	Keep VB auto-properties collapsing when the field keyword is on	1 month ago
PrettifyAssignments.cs	Gate decrement conversion behind IntroduceIncrementAndDecrement	1 month ago
RemoveCLSCompliantAttribute.cs	…
RenameVisualBasicAnonymousTypes.cs	Declare VB anonymous types that C# anonymous types cannot express	1 month ago
ReplaceMethodCallsWithOperators.cs	Fix #3895 : keep byref-like ToString in string concatenation	2 months ago
TransformContext.cs	…
TransformFieldAndConstructorInitializers.cs	Move the remaining ResolveResult subclasses into the Semantics namespace	1 month ago