private static bool IsPreferGetMemberThenAccessor(ReflectedMember member, Name name, Flags flags, Types types, SyntaxNodeAnalysisContext context, out string callText)
{
if (member.Invocation?.Expression is MemberAccessExpressionSyntax memberAccess)
{
if (member.Symbol is IMethodSymbol method)
{
if (method.AssociatedSymbol is IPropertySymbol property &&
Flags.TryGetExpectedBindingFlags(property.ContainingType, property, out var bindingFlags))
{
return TryGetPropertyAccessor(MemberName(property), bindingFlags, property.Type, out callText);
}
if (method.AssociatedSymbol is IEventSymbol eventSymbol &&
Flags.TryGetExpectedBindingFlags(eventSymbol.ContainingType, eventSymbol, out bindingFlags))
{
return TryGetEventAccessor(MemberName(eventSymbol), bindingFlags, out callText);
}
}
//// For symbols not in source and not visible in metadata.
else if (member.Symbol is null &&
types.Argument == null &&
flags.Explicit.HasFlagFast(BindingFlags.NonPublic))
{
if (TryGetInvisibleMemberName("get_", out var memberName) ||
TryGetInvisibleMemberName("set_", out memberName))
{
return TryGetPropertyAccessor(memberName, flags.Explicit, null, out callText);
}
if (TryGetInvisibleMemberName("add_", out memberName) ||
TryGetInvisibleMemberName("remove_", out memberName) ||
TryGetInvisibleMemberName("raise_", out memberName))
{
return TryGetEventAccessor(memberName, flags.Explicit, out callText);
}
}
}
callText = null;
return false;
bool TryGetPropertyAccessor(string propertyName, BindingFlags bindingFlags, ITypeSymbol type, out string result)
{
if (name.MetadataName.StartsWith("get_", StringComparison.OrdinalIgnoreCase))
{
result = types.Argument == null
? $"{memberAccess.Expression}.GetProperty({propertyName}, {bindingFlags.ToDisplayString(memberAccess)}).GetMethod"
: $"{memberAccess.Expression}.GetProperty({propertyName}, {bindingFlags.ToDisplayString(memberAccess)}, null, typeof({type.ToString(context)}), {types.Argument}, null).GetMethod";
return true;
}
if (name.MetadataName.StartsWith("set_", StringComparison.OrdinalIgnoreCase))
{
result = types.Argument == null
? $"{memberAccess.Expression}.GetProperty({propertyName}, {bindingFlags.ToDisplayString(memberAccess)}).SetMethod"
: $"{memberAccess.Expression}.GetProperty({propertyName}, {bindingFlags.ToDisplayString(memberAccess)}, null, typeof({type.ToString(context)}), {types.Argument}, null).SetMethod";
return true;
}
result = null;
return false;
}
bool TryGetEventAccessor(string eventName, BindingFlags bindingFlags, out string result)
{
if (name.MetadataName.StartsWith("add_", StringComparison.OrdinalIgnoreCase))
{
result = $"{memberAccess.Expression}.GetEvent({eventName}, {bindingFlags.ToDisplayString(memberAccess)}).AddMethod";
return true;
}
if (name.MetadataName.StartsWith("remove_", StringComparison.OrdinalIgnoreCase))
{
result = $"{memberAccess.Expression}.GetEvent({eventName}, {bindingFlags.ToDisplayString(memberAccess)}).RemoveMethod";
return true;
}
if (name.MetadataName.StartsWith("raise_", StringComparison.OrdinalIgnoreCase))
{
result = $"{memberAccess.Expression}.GetEvent({eventName}, {bindingFlags.ToDisplayString(memberAccess)}).RaiseMethod";
return true;
}
result = null;
return false;
}
bool TryGetInvisibleMemberName(string prefix, out string memberName)
{
if (name.MetadataName is string metadataName &&
metadataName.StartsWith(prefix, StringComparison.OrdinalIgnoreCase))
{
memberName = $"\"{metadataName.Substring(prefix.Length)}\"";
return true;
}
memberName = null;
return false;
}
string MemberName(ISymbol associatedSymbol)
{
if (associatedSymbol is IPropertySymbol property &&
property.IsIndexer)
{
return $"\"{associatedSymbol.MetadataName}\"";
}
if (context.ContainingSymbol.ContainingType == associatedSymbol.ContainingType)
{
if (member.Symbol.IsStatic)
{
return $"nameof({associatedSymbol.Name})";
}
return context.SemanticModel.UnderscoreFields() ? associatedSymbol.Name : $"nameof(this.{associatedSymbol.Name})";
}
return context.SemanticModel.IsAccessible(context.Node.SpanStart, associatedSymbol)
? $"nameof({associatedSymbol.ContainingType.ToString(context)}.{associatedSymbol.Name})"
: $"\"{associatedSymbol.Name}\"";
}
}
private static bool TryGetX(SyntaxNodeAnalysisContext context, out ReflectedMember member, out Name name, out Flags flags, out Types types)
{
name = default(Name);
if (context.Node is InvocationExpressionSyntax candidate)
{
return GetX.TryMatchGetConstructor(candidate, context, out member, out flags, out types) ||
GetX.TryMatchGetEvent(candidate, context, out member, out name, out flags) ||
GetX.TryMatchGetField(candidate, context, out member, out name, out flags) ||
GetX.TryMatchGetMethod(candidate, context, out member, out name, out flags, out types) ||
GetX.TryMatchGetNestedType(candidate, context, out member, out name, out flags) ||
GetX.TryMatchGetProperty(candidate, context, out member, out name, out flags, out types);
}
member = default(ReflectedMember);
flags = default(Flags);
types = default(Types);
return false;
}
private static FilterMatch TryGetMember(IMethodSymbol getX, ITypeSymbol type, Name name, BindingFlags flags, Types types, Compilation compilation, out ISymbol?member)
{
if (type is INamedTypeSymbol {
IsUnboundGenericType : true
})
private static bool IsPreferGetMemberThenAccessor(ReflectedMember member, Name name, Flags flags, Types types, SyntaxNodeAnalysisContext context, out string callText)
{
if (member.Invocation?.Expression is MemberAccessExpressionSyntax memberAccess)
{
if (member.Symbol is IMethodSymbol method &&
member.Match == FilterMatch.Single)
{
if (method.AssociatedSymbol is IPropertySymbol property &&
Flags.TryGetExpectedBindingFlags(property.ContainingType, property, out var bindingFlags))
{
return(TryGetPropertyAccessor(MemberName(property), bindingFlags, property.Type, out callText));
}
if (method.AssociatedSymbol is IEventSymbol eventSymbol &&
Flags.TryGetExpectedBindingFlags(eventSymbol.ContainingType, eventSymbol, out bindingFlags))
{
return(TryGetEventAccessor(MemberName(eventSymbol), bindingFlags, out callText));
}
}
else if (member.Match == FilterMatch.PotentiallyInvisible &&
types.Argument == null &&
flags.Explicit.HasFlagFast(BindingFlags.NonPublic))
{
if (TryGetInvisibleMemberName("get_", out var memberName) ||
TryGetInvisibleMemberName("set_", out memberName))
{
return(TryGetPropertyAccessor(memberName, flags.Explicit, null, out callText));
}
if (TryGetInvisibleMemberName("add_", out memberName) ||
TryGetInvisibleMemberName("remove_", out memberName) ||
TryGetInvisibleMemberName("raise_", out memberName))
{
return(TryGetEventAccessor(memberName, flags.Explicit, out callText));
}
}
}
internal static bool TryCreate(IMethodSymbol getX, InvocationExpressionSyntax invocation, INamedTypeSymbol type, ExpressionSyntax typeSource, Name name, BindingFlags flags, Types types, Compilation compilation, out ReflectedMember member)
{
var match = TryGetMember(getX, type, name, flags, types, compilation, out var memberSymbol);
member = new ReflectedMember(type, typeSource, memberSymbol, getX, invocation, match);
return(true);
}