Type of issue

Code doesn't work

Description

The static operator from the code snippet from snippets/shared/OperatorOverloading.cs do not work properly and instead do nothing to the current "Fraction" struct and is functionally a no-op,

// Define increment and decrement to add 1/den, rather than 1/1.
public static Fraction operator ++(Fraction operand)
    // the next line return a fraction with the current numerator.
    => new Fraction(operand.numerator++, operand.denominator);

public static Fraction operator --(Fraction operand) =>
    // the next line return a fraction with the current numerator.
    new Fraction(operand.numerator--, operand.denominator);

And because Fraction is a struct and not a class. Only the copied fraction has its numerator increased. Not the numerator in the line a++; so again it's a no-op.

If you run b = ++a; Console.WriteLine(a); Console.WriteLine(b); in the snippet you'll see that a hasn't changed at all.

Page URL

https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/operators/operator-overloading

Content source URL

https://github.com/dotnet/docs/blob/main/docs/csharp/language-reference/operators/operator-overloading.md

Document Version Independent Id

5ec5c397-c7c6-700c-bc36-a8dfb2396dad

Platform Id

e83aae5a-e070-c00c-3914-cadfa33a9fe9

Article author

@BillWagner

Metadata

• ID: f91d85ae-8b37-e837-a031-144571362fbb
• PlatformId: e83aae5a-e070-c00c-3914-cadfa33a9fe9
• Service: dotnet-csharp
• Sub-service: lang-reference

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