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);
}
/// <summary>
/// In regular C#, all field initializers are assignments to fields and the assigned expressions
/// may not reference instance members.
/// </summary>
private static void BindRegularCSharpFieldInitializers(
CSharpCompilation compilation,
ImmutableArray <FieldInitializers> initializers,
ArrayBuilder <BoundInitializer> boundInitializers,
DiagnosticBag diagnostics,
bool generateDebugInfo,
out ConsList <Imports> firstDebugImports)
{
firstDebugImports = null;
foreach (FieldInitializers siblingInitializers in initializers)
{
// 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;
var infos = ArrayBuilder <FieldInitializerInfo> .GetInstance(); // Exact size is not known up front.
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);
}
ArrayBuilder <BoundInitializer> initializersBuilder = locals.IsDefaultOrEmpty ? boundInitializers : ArrayBuilder <BoundInitializer> .GetInstance(infos.Count);
foreach (var info in infos)
{
Binder binder = info.Binder;
ScopedExpressionBinder scopedExpressionBinder = null;
// Constant initializers is not part of the initialization scope.
if (info.Initializer.Field.IsConst || locals.IsDefault)
{
binder = scopedExpressionBinder = new ScopedExpressionBinder(binder, info.EqualsValue.Value);
}
else if (!locals.IsEmpty)
{
binder = new SimpleLocalScopeBinder(locals, binder);
}
BoundFieldInitializer boundInitializer = BindFieldInitializer(binder, info.Initializer.Field, info.EqualsValue, diagnostics);
if (scopedExpressionBinder != null && !scopedExpressionBinder.Locals.IsDefaultOrEmpty)
{
boundInitializer = boundInitializer.Update(boundInitializer.Field, scopedExpressionBinder.AddLocalScopeToExpression(boundInitializer.InitialValue));
}
initializersBuilder.Add(boundInitializer);
}
Debug.Assert(locals.IsDefaultOrEmpty == (initializersBuilder == boundInitializers));
if (!locals.IsDefaultOrEmpty)
{
boundInitializers.Add(new BoundInitializationScope((CSharpSyntaxNode)siblingInitializers.TypeDeclarationSyntax.GetSyntax(),
locals, initializersBuilder.ToImmutableAndFree()));
}
}
}