void HandleStaticFieldInitializers(IEnumerable <AstNode> members)
{
// Translate static constructor into field initializers if the class is BeforeFieldInit
var staticCtor = members.OfType <ConstructorDeclaration>().FirstOrDefault(c => (c.Modifiers & Modifiers.Static) == Modifiers.Static);
if (staticCtor != null)
{
bool ctorIsUnsafe = staticCtor.HasModifier(Modifiers.Unsafe);
IMethod ctorMethod = staticCtor.GetSymbol() as IMethod;
if (!ctorMethod.MetadataToken.IsNil)
{
var metadata = context.TypeSystem.MainModule.PEFile.Metadata;
SRM.MethodDefinition ctorMethodDef = metadata.GetMethodDefinition((SRM.MethodDefinitionHandle)ctorMethod.MetadataToken);
SRM.TypeDefinition declaringType = metadata.GetTypeDefinition(ctorMethodDef.GetDeclaringType());
if (declaringType.HasFlag(System.Reflection.TypeAttributes.BeforeFieldInit))
{
while (true)
{
ExpressionStatement es = staticCtor.Body.Statements.FirstOrDefault() as ExpressionStatement;
if (es == null)
{
break;
}
AssignmentExpression assignment = es.Expression as AssignmentExpression;
if (assignment == null || assignment.Operator != AssignmentOperatorType.Assign)
{
break;
}
IMember fieldOrProperty = (assignment.Left.GetSymbol() as IMember)?.MemberDefinition;
if (!(fieldOrProperty is IField || fieldOrProperty is IProperty) || !fieldOrProperty.IsStatic)
{
break;
}
var fieldOrPropertyDecl = members.FirstOrDefault(f => f.GetSymbol() == fieldOrProperty) as EntityDeclaration;
if (fieldOrPropertyDecl == null)
{
break;
}
if (ctorIsUnsafe && IntroduceUnsafeModifier.IsUnsafe(assignment.Right))
{
fieldOrPropertyDecl.Modifiers |= Modifiers.Unsafe;
}
if (fieldOrPropertyDecl is FieldDeclaration fd)
{
fd.Variables.Single().Initializer = assignment.Right.Detach();
}
else if (fieldOrPropertyDecl is PropertyDeclaration pd)
{
pd.Initializer = assignment.Right.Detach();
}
else
{
break;
}
es.Remove();
}
if (staticCtor.Body.Statements.Count == 0)
{
staticCtor.Remove();
}
}
}
}
}
void HandleInstanceFieldInitializers(IEnumerable <AstNode> members)
{
var instanceCtors = members.OfType <ConstructorDeclaration>().Where(c => (c.Modifiers & Modifiers.Static) == 0).ToArray();
var instanceCtorsNotChainingWithThis = instanceCtors.Where(ctor => !thisCallPattern.IsMatch(ctor.Body.Statements.FirstOrDefault())).ToArray();
if (instanceCtorsNotChainingWithThis.Length > 0)
{
var ctorMethodDef = instanceCtorsNotChainingWithThis[0].GetSymbol() as IMethod;
if (ctorMethodDef != null && ctorMethodDef.DeclaringType.IsReferenceType == false)
{
return;
}
bool ctorIsUnsafe = instanceCtorsNotChainingWithThis.All(c => c.HasModifier(Modifiers.Unsafe));
// Recognize field or property initializers:
// Translate first statement in all ctors (if all ctors have the same statement) into an initializer.
bool allSame;
do
{
Match m = fieldInitializerPattern.Match(instanceCtorsNotChainingWithThis[0].Body.FirstOrDefault());
if (!m.Success)
{
break;
}
IMember fieldOrPropertyOrEvent = (m.Get <AstNode>("fieldAccess").Single().GetSymbol() as IMember)?.MemberDefinition;
if (!(fieldOrPropertyOrEvent is IField) && !(fieldOrPropertyOrEvent is IProperty) && !(fieldOrPropertyOrEvent is IEvent))
{
break;
}
var fieldOrPropertyOrEventDecl = members.FirstOrDefault(f => f.GetSymbol() == fieldOrPropertyOrEvent) as EntityDeclaration;
// Cannot transform if member is not found or if it is a custom event.
if (fieldOrPropertyOrEventDecl == null || fieldOrPropertyOrEventDecl is CustomEventDeclaration)
{
break;
}
Expression initializer = m.Get <Expression>("initializer").Single();
// 'this'/'base' cannot be used in initializers
if (initializer.DescendantsAndSelf.Any(n => n is ThisReferenceExpression || n is BaseReferenceExpression))
{
break;
}
allSame = true;
for (int i = 1; i < instanceCtorsNotChainingWithThis.Length; i++)
{
var otherMatch = fieldInitializerPattern.Match(instanceCtorsNotChainingWithThis[i].Body.FirstOrDefault());
if (!otherMatch.Success)
{
allSame = false;
break;
}
var otherMember = (otherMatch.Get <AstNode>("fieldAccess").Single().GetSymbol() as IMember)?.MemberDefinition;
if (!otherMember.Equals(fieldOrPropertyOrEvent))
{
allSame = false;
}
if (!initializer.IsMatch(otherMatch.Get <AstNode>("initializer").Single()))
{
allSame = false;
}
}
if (allSame)
{
foreach (var ctor in instanceCtorsNotChainingWithThis)
{
ctor.Body.First().Remove();
}
if (ctorIsUnsafe && IntroduceUnsafeModifier.IsUnsafe(initializer))
{
fieldOrPropertyOrEventDecl.Modifiers |= Modifiers.Unsafe;
}
if (fieldOrPropertyOrEventDecl is PropertyDeclaration pd)
{
pd.Initializer = initializer.Detach();
}
else
{
fieldOrPropertyOrEventDecl.GetChildrenByRole(Roles.Variable).Single().Initializer = initializer.Detach();
}
}
} while (allSame);
}
}
