internal static ImmutableArray<LocalSymbol> GetFieldInitializerInfos(
CSharpCompilation compilation,
FieldInitializers siblingInitializers,
ArrayBuilder<FieldInitializerInfo> infos,
bool generateDebugInfo,
ref ConsList<Imports> firstDebugImports)
{
// All sibling initializers share the same parent node and tree so we can reuse the binder
// factory across siblings. Unfortunately, we cannot reuse the binder itself, because
// individual fields might have their own binders (e.g. because of being declared unsafe).
BinderFactory binderFactory = null;
foreach (FieldInitializer initializer in siblingInitializers.Initializers)
{
FieldSymbol fieldSymbol = initializer.Field;
Debug.Assert((object)fieldSymbol != null);
// A constant field of type decimal needs a field initializer, so
// check if it is a metadata constant, not just a constant to exclude
// decimals. Other constants do not need field initializers.
if (!fieldSymbol.IsMetadataConstant)
{
//Can't assert that this is a regular C# compilation, because we could be in a nested type of a script class.
SyntaxReference syntaxRef = initializer.Syntax;
var initializerNode = (EqualsValueClauseSyntax)syntaxRef.GetSyntax();
if (binderFactory == null)
{
binderFactory = compilation.GetBinderFactory(syntaxRef.SyntaxTree);
}
Binder parentBinder = binderFactory.GetBinder(initializerNode);
Debug.Assert(parentBinder.ContainingMemberOrLambda == fieldSymbol.ContainingType || //should be the binder for the type
fieldSymbol.ContainingType.IsImplicitClass); //however, we also allow fields in namespaces to help support script scenarios
if (generateDebugInfo && firstDebugImports == null)
{
firstDebugImports = parentBinder.ImportsList;
}
parentBinder = new LocalScopeBinder(parentBinder).WithAdditionalFlagsAndContainingMemberOrLambda(parentBinder.Flags | BinderFlags.FieldInitializer, fieldSymbol);
if (!fieldSymbol.IsConst && !fieldSymbol.IsStatic)
{
parentBinder = parentBinder.WithPrimaryConstructorParametersIfNecessary(fieldSymbol.ContainingType);
}
infos.Add(new FieldInitializerInfo(initializer, parentBinder, initializerNode));
}
}
// See if there are locals that we need to bring into the scope.
var locals = default(ImmutableArray<LocalSymbol>);
if (siblingInitializers.TypeDeclarationSyntax != null)
{
locals = GetInitializationScopeLocals(infos);
if (!locals.IsDefaultOrEmpty)
{
for (int i = 0; i < infos.Count; i++)
{
FieldInitializerInfo info = infos[i];
// Constant initializers is not part of the initialization scope.
if (!info.Initializer.Field.IsConst)
{
infos[i] = new FieldInitializerInfo(info.Initializer,
new SimpleLocalScopeBinder(locals, info.Binder),
info.EqualsValue);
}
}
}
}
return locals;
}
private FieldInitializersInfo GetFieldInitializersInfo(ConcurrentDictionary<TypeDeclarationSyntax, FieldInitializersInfo> map, FieldInitializers siblingInitializers)
{
return map.GetOrAdd((TypeDeclarationSyntax)siblingInitializers.TypeDeclarationSyntax.GetSyntax(),
(typeDecl) =>
{
var infos = ArrayBuilder<FieldInitializerInfo>.GetInstance(); // Exact size is not known up front.
ConsList<Imports> firstDebugImports = null;
var locals = Binder.GetFieldInitializerInfos(compilation, siblingInitializers, infos, false, ref firstDebugImports);
return new FieldInitializersInfo(locals, infos.ToImmutableAndFree());
});
}