ioresult

func WithContext ¶

func WithContext[A any](ctx context.Context, ma IOResult[A]) IOResult[A]

WithContext wraps an IOResult and performs a context check for cancellation before executing. This ensures that if the context is already cancelled, the computation short-circuits immediately without executing the wrapped computation.

This is useful for adding cancellation awareness to computations that might not check the context themselves.

Type Parameters:

• A: The type of the success value

Parameters:

• ctx: The context to check for cancellation
• ma: The IOResult to wrap with context checking

Returns:

• An IOResult that checks for cancellation before executing

Example:

computation := func() Result[string] {
    // Long-running operation
    return result.Of("done")
}

ctx, cancel := context.WithCancel(t.Context())
cancel() // Cancel immediately

wrapped := WithContext(ctx, computation)
result := wrapped() // Returns Left with context.Canceled error