C2679: Binary Operator – No Operator Found Taking ‘type’ as Right-Hand Operand in UE5 – What It Means & How to Fix It

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🧠 Why You’re Seeing This Error

The C2679 error means you’re trying to use a binary operator (like +, -, =, ==, etc.) with a type that doesn’t support it — at least not in the way you’ve written it.

In UE5, this usually happens when:

• You try to + two types that don’t define how to be added (like FVector + FString)
• You mix UE5 types (like FString or FName) with regular strings (const char*)
• You use operators incorrectly on classes or pointers
• You forget to wrap string literals in TEXT() when working with FString

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💥 Example Error Message

error C2679: binary '+' : no operator found which takes a right-hand operand of type 'const char [7]' (or there is no acceptable conversion)

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🛠️ Example Code

FString PlayerName = "Player" + FString("One"); // ❌ C2679

UE5 doesn’t know how to + a string literal ("Player") with an FString.

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✅ How to Fix C2679 in UE5 – Step-by-Step

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✔️ 1. Wrap String Literals in TEXT() and Convert to FString

Fix:

FString PlayerName = FString(TEXT("Player")) + FString(TEXT("One")); // ✅

Or shorter:

FString PlayerName = TEXT("Player") + FString("One");

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✔️ 2. Avoid Mixing Types Like FVector + FString

These types aren’t meant to be used together. If you’re logging or building strings, convert types explicitly.

Wrong:

FVector Pos = GetActorLocation();
FString Log = "Location: " + Pos; // ❌ Can't add FString + FVector

Fix:

FVector Pos = GetActorLocation();
FString Log = "Location: " + Pos.ToString(); // ✅ Convert FVector to FString

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✔️ 3. Use operator+ Correctly for Custom Types

If you’re working with your own structs or classes and want to use operators like +, you’ll need to define them yourself.

Fix (inside your struct):

MyStruct operator+(const MyStruct& Other) const
{
    MyStruct Result;
    // logic here...
    return Result;
}

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✅ Summary: How to Fix C2679 in UE5

Cause	Fix Example
Mixing const char* with FString	Wrap literals with TEXT() or convert with FString()
Using incompatible types with +	Convert to compatible types (e.g., ToString())
Custom struct needs operator support	Overload the operator+ in your struct/class