253/// The delegate is invoked by <see cref="VisitConversion(BoundConversion, BoundExpression, Conversion, TypeWithAnnotations, TypeWithState, bool, bool, bool, AssignmentKind, ParameterSymbol, bool, bool, bool, bool, Optional&lt;LocalState&gt;,bool, Location, ArrayBuilder&lt;VisitResult&gt;)"/>. 2384AssignmentKind assignmentKind = AssignmentKind.Assignment, 2412ReportDiagnostic(assignmentKind == AssignmentKind.Return ? ErrorCode.WRN_NullReferenceReturn : ErrorCode.WRN_NullAsNonNullable, location); 2414else if (assignmentKind == AssignmentKind.Argument) 2434ReportDiagnostic(assignmentKind == AssignmentKind.Return ? ErrorCode.WRN_NullReferenceReturn : ErrorCode.WRN_NullReferenceAssignment, location); 2996assignmentKind: AssignmentKind.Assignment); 3048returnState = VisitOptionalImplicitConversion(expr, returnType, useLegacyWarnings: false, trackMembers: false, AssignmentKind.Return); 3643valueType = VisitOptionalImplicitConversion(initializer, targetTypeOpt: inferredType ? default : type, useLegacyWarnings: true, trackMembers: true, AssignmentKind.Assignment); 3861useLegacyWarnings: false, trackMembers: false, AssignmentKind.Assignment, delayCompletionForTargetType: true).completion; 3876useLegacyWarnings: false, trackMembers: false, AssignmentKind.Assignment, delayCompletionForTargetType: true).completion; 4411VisitOptionalImplicitConversion(node.Right, type, useLegacyWarnings: false, trackMembers: true, AssignmentKind.Assignment, delayCompletionForType); 4732_ = VisitOptionalImplicitConversion(expr, elementType, useLegacyWarnings: false, trackMembers: false, AssignmentKind.Assignment); 4777fromExplicitCast: false, useLegacyWarnings: false, AssignmentKind.Assignment, reportRemainingWarnings: true, reportTopLevelWarnings: false); 4789checkConversion: true, fromExplicitCast: false, useLegacyWarnings: false, AssignmentKind.Assignment, reportRemainingWarnings: false); 4892checkConversion: false, fromExplicitCast: false, useLegacyWarnings: false, AssignmentKind.Return, 5278AssignmentKind.Argument, 5316AssignmentKind.Argument); 5718TypeWithState rightResult = VisitOptionalImplicitConversion(rightOperand, targetType, useLegacyWarnings: UseLegacyWarnings(leftOperand), trackMembers: false, AssignmentKind.Assignment); 5813AssignmentKind.Assignment, 5854assignmentKind: AssignmentKind.Assignment); 6280AssignmentKind.Assignment, 7546assignmentKind: AssignmentKind.Argument, 8456AssignmentKind.Assignment, 8470private TypeWithState VisitOptionalImplicitConversion(BoundExpression expr, TypeWithAnnotations targetTypeOpt, bool useLegacyWarnings, bool trackMembers, AssignmentKind assignmentKind) 8487AssignmentKind assignmentKind, 8499bool useLegacyWarnings, bool trackMembers, AssignmentKind assignmentKind, 8533Func<TypeWithAnnotations, TypeWithState> visitConversionAsContinuation(BoundExpression expr, bool useLegacyWarnings, bool trackMembers, AssignmentKind assignmentKind, BoundExpression operand, Conversion conversion, TypeWithState operandType) 8691AssignmentKind assignmentKind, 8946AssignmentKind assignmentKind, 9272if (assignmentKind == AssignmentKind.Argument) 9498AssignmentKind assignmentKind, 9566AssignmentKind.Argument, 9717AssignmentKind assignmentKind, 9729if (assignmentKind == AssignmentKind.Argument) 10139rightState = VisitOptionalImplicitConversion(right, targetTypeOpt: discarded ? default : leftLValueType, UseLegacyWarnings(left), trackMembers: true, AssignmentKind.Assignment); 10461valueType = VisitOptionalImplicitConversion(rightPart, lvalueType, useLegacyWarnings: true, trackMembers: true, AssignmentKind.Assignment); 10478AssignmentKind.Assignment, 10606AssignmentKind assignmentKind = AssignmentKind.Assignment; 10618assignmentKind = AssignmentKind.Argument; 10671AssignmentKind.Assignment); 10740assignmentKind: AssignmentKind.Assignment); 10782ReportNullableAssignmentIfNecessary(argument, paramType, argumentType, useLegacyWarnings: false, AssignmentKind.Argument, parameterOpt: parameter); 11143AssignmentKind.Assignment); 11318AssignmentKind.ForEachIterationVariable, 11454assignmentKind: AssignmentKind.Argument, 12179_ = VisitOptionalImplicitConversion(expr, elementType, useLegacyWarnings: false, trackMembers: false, AssignmentKind.Return);