FName::AppendString

function Core Since 4.0

#include "UObject/NameTypes.h"

Access: public

Description

Appends the full name string (including numeric suffix) to an existing FString or string builder without creating an intermediate FString allocation. Preferred over ToString() in GetFullName-style concatenation.

Caveats & Gotchas

• Multiple overloads exist: FWideString&, FUtf8String&, FWideStringBuilderBase&, FUtf8StringBuilderBase&. Pick the overload that matches your accumulation type to avoid unnecessary conversions.
• This appends the same content as ToString() — numeric suffix included. There is no AppendPlainString equivalent; to append the suffix-free name you must call GetPlainNameString() and concatenate manually.
• When building long composite strings (e.g. object full paths), prefer a TStringBuilder<256> and AppendString over repeated FString concatenation, which reallocates on each call.

Signature

CORE_API void AppendString(FWideString& Out) const

Parameters

Name	Type	Description	Default
Out	FWideString&	The string or string builder to append the name representation into.	—

Return Type

void

Example

Build a full object path without intermediate allocations C++

TStringBuilder<256> PathBuilder;
PathBuilder.Append(TEXT("/Game/Maps/"));
LevelName.AppendString(PathBuilder);
FString FullPath = PathBuilder.ToString();
UE_LOG(LogTemp, Log, TEXT("Path: %s"), *FullPath);

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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