public override Field VisitField(Field field) {
if (field == null) return null;
bool savedInsideUnsafeCode = this.typeSystem.insideUnsafeCode;
this.typeSystem.insideUnsafeCode = field.IsUnsafe;
if (field.DeclaringType is Interface && !this.InterfaceAllowsThisKindOfField(field))
this.HandleError(field, Error.InterfaceHasField);
this.currentField = field;
field.ImplementedInterfaces = this.VisitInterfaceReferenceList(field.ImplementedInterfaces);
if (this.currentType != null && (this.currentType.Flags & TypeFlags.ExplicitLayout) != 0 && !field.IsStatic) {
if ((field.Attributes == null || field.GetAttribute(SystemTypes.FieldOffsetAttribute) == null) && (field.DeclaringType == null || !field.DeclaringType.IsNormalized)) {
this.HandleError(field.Name, Error.MissingStructOffset, this.GetMemberSignature(field));
}
}
field.Attributes = this.VisitAttributeList(field.Attributes, field);
field.Type = this.VisitTypeReference(field.Type);
EnumNode enumType = field.DeclaringType as EnumNode;
if (enumType == null && this.IsLessAccessible(field.Type, field) && (field.DeclaringType == null || !field.DeclaringType.IsNormalized)) {
this.HandleError(field.Name, Error.FieldTypeLessAccessibleThanField, this.GetTypeName(field.Type), this.GetTypeName(field.DeclaringType)+"."+field.Name);
this.HandleRelatedError(field.Type);
}
if (field.IsVolatile) {
if (field.IsInitOnly || field.IsLiteral) {
this.HandleError(field.Name, Error.VolatileAndReadonly, this.GetMemberSignature(field));
field.Flags &= ~FieldFlags.InitOnly;
} else if (field.Type != null && field.Type.IsValueType) {
switch (this.typeSystem.GetUnderlyingType(field.Type).TypeCode) {
case TypeCode.Boolean:
case TypeCode.Byte:
case TypeCode.SByte:
case TypeCode.Int16:
case TypeCode.UInt16:
case TypeCode.Int32:
case TypeCode.UInt32:
case TypeCode.Char:
case TypeCode.Single:
break;
default:
if (field.Type != SystemTypes.IntPtr && field.Type != SystemTypes.UIntPtr)
this.HandleError(field.Name, Error.VolatileNonWordSize, this.GetMemberSignature(field), this.GetTypeName(field.Type));
break;
}
}
}
if (field.Initializer != null) {
if (!field.IsStatic && field.DeclaringType is Struct)
this.HandleError(field.Initializer, Error.InstanceFieldInitializerInStruct, this.GetMemberSignature(field));
bool savedCheckOverflow = this.typeSystem.checkOverflow;
this.typeSystem.checkOverflow = true;
if (field.IsLiteral && enumType != null) {
field.Initializer = this.VisitExpression(field.Initializer);
if (field.Initializer != null && field.DefaultValue != null) {
Literal lit = field.DefaultValue;
if (lit.Type != null && !this.typeSystem.ImplicitLiteralCoercionFromTo(lit, lit.Type, enumType.UnderlyingType)) {
if (!enumType.IsErroneous) {
if ((lit.Type.IsPrimitiveInteger || lit.Type == enumType) && lit.Value is IConvertible && ((IConvertible)lit.Value).ToInt64(null) >= 0)
this.HandleError(field.Initializer, Error.EnumerationValueOutOfRange, this.GetMemberSignature(field));
else
this.HandleError(field.Initializer, Error.NoImplicitCoercionFromConstant, lit.SourceContext.SourceText, this.GetTypeName(enumType.UnderlyingType));
}
field.DefaultValue = new Literal(0, enumType.UnderlyingType, lit.SourceContext);
enumType.IsErroneous = true;
}
} else {
field.DefaultValue = new Literal(0, enumType.UnderlyingType);
enumType.IsErroneous = true;
}
} else {
field.Initializer = this.typeSystem.ImplicitCoercion(this.VisitExpression(field.Initializer), field.Type, this.TypeViewer);
if (field.IsLiteral) field.DefaultValue = field.Initializer as Literal;
}
this.typeSystem.checkOverflow = savedCheckOverflow;
}
if (field.IsLiteral && field.DefaultValue == null) {
if (field.Initializer != null)
this.HandleError(field.Initializer, Error.NotConstantExpression, this.GetMemberSignature(field));
field.Flags &= ~(FieldFlags.Literal|FieldFlags.HasDefault);
field.Flags |= FieldFlags.InitOnly;
}
if (field.IsStrictReadonly) {
if (!field.IsInitOnly)
this.HandleError(field, Error.StrictReadonlyNotReadonly);
if (field.IsStatic)
this.HandleError(field, Error.StrictReadonlyStatic);
}
this.currentField = null;
this.typeSystem.insideUnsafeCode = savedInsideUnsafeCode;
return field;
}