224/// The delegate is invoked by <see cref="VisitConversion(BoundConversion, BoundExpression, Conversion, TypeWithAnnotations, TypeWithState, bool, bool, bool, AssignmentKind, ParameterSymbol, bool, bool, bool, Optional&lt;LocalState&gt;,bool, Location, ArrayBuilder&lt;VisitResult&gt;)"/>. 2229AssignmentKind assignmentKind = AssignmentKind.Assignment, 2245(value.WasCompilerGenerated && assignmentKind == AssignmentKind.Argument && value.Kind != BoundKind.InterpolatedStringArgumentPlaceholder) || 2262ReportDiagnostic(assignmentKind == AssignmentKind.Return ? ErrorCode.WRN_NullReferenceReturn : ErrorCode.WRN_NullAsNonNullable, location); 2264else if (assignmentKind == AssignmentKind.Argument) 2284ReportDiagnostic(assignmentKind == AssignmentKind.Return ? ErrorCode.WRN_NullReferenceReturn : ErrorCode.WRN_NullReferenceAssignment, location); 2776assignmentKind: AssignmentKind.Assignment); 2828returnState = VisitOptionalImplicitConversion(expr, returnType, useLegacyWarnings: false, trackMembers: false, AssignmentKind.Return); 3302valueType = VisitOptionalImplicitConversion(initializer, targetTypeOpt: inferredType ? default : type, useLegacyWarnings: true, trackMembers: true, AssignmentKind.Assignment); 3866VisitOptionalImplicitConversion(node.Right, type, useLegacyWarnings: false, trackMembers: true, AssignmentKind.Assignment, delayCompletionForType); 4179_ = VisitOptionalImplicitConversion(expr, elementType, useLegacyWarnings: false, trackMembers: false, AssignmentKind.Assignment); 4226fromExplicitCast: false, useLegacyWarnings: false, AssignmentKind.Assignment, reportRemainingWarnings: true, reportTopLevelWarnings: false); 4237checkConversion: true, fromExplicitCast: false, useLegacyWarnings: false, AssignmentKind.Assignment, reportRemainingWarnings: false); 4341checkConversion: false, fromExplicitCast: false, useLegacyWarnings: false, AssignmentKind.Return, 4688AssignmentKind.Argument, 4722AssignmentKind.Argument); 5112TypeWithState rightResult = VisitOptionalImplicitConversion(rightOperand, targetType, useLegacyWarnings: UseLegacyWarnings(leftOperand), trackMembers: false, AssignmentKind.Assignment); 5205AssignmentKind.Assignment, 5246assignmentKind: AssignmentKind.Assignment); 5639AssignmentKind.Assignment, 6591assignmentKind: AssignmentKind.Argument, 7445AssignmentKind.Assignment, 7459private TypeWithState VisitOptionalImplicitConversion(BoundExpression expr, TypeWithAnnotations targetTypeOpt, bool useLegacyWarnings, bool trackMembers, AssignmentKind assignmentKind) 7476AssignmentKind assignmentKind, 7488bool useLegacyWarnings, bool trackMembers, AssignmentKind assignmentKind, 7522Func<TypeWithAnnotations, TypeWithState> visitConversionAsContinuation(BoundExpression expr, bool useLegacyWarnings, bool trackMembers, AssignmentKind assignmentKind, BoundExpression operand, Conversion conversion, TypeWithState operandType) 7674AssignmentKind assignmentKind, 7916AssignmentKind assignmentKind, 8221if (assignmentKind == AssignmentKind.Argument) 8440AssignmentKind assignmentKind, 8507AssignmentKind.Argument, 8655AssignmentKind assignmentKind, 8667if (assignmentKind == AssignmentKind.Argument) 9074rightState = VisitOptionalImplicitConversion(right, targetTypeOpt: discarded ? default : leftLValueType, UseLegacyWarnings(left), trackMembers: true, AssignmentKind.Assignment); 9396valueType = VisitOptionalImplicitConversion(rightPart, lvalueType, useLegacyWarnings: true, trackMembers: true, AssignmentKind.Assignment); 9413AssignmentKind.Assignment, 9541AssignmentKind assignmentKind = AssignmentKind.Assignment; 9553assignmentKind = AssignmentKind.Argument; 9606AssignmentKind.Assignment); 9654AssignmentKind.Assignment, 9688AssignmentKind.Assignment); 9732ReportNullableAssignmentIfNecessary(argument, paramType, argumentType, useLegacyWarnings: false, AssignmentKind.Argument, parameterOpt: parameter); 10063AssignmentKind.Assignment); 10220AssignmentKind.ForEachIterationVariable, 10355assignmentKind: AssignmentKind.Argument, 11082_ = VisitOptionalImplicitConversion(expr, elementType, useLegacyWarnings: false, trackMembers: false, AssignmentKind.Return);