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func WithSpanResult[Result any](
    ctx context.Context,
    name string,
    f func(ctx context.Context) (Result, error),
) (Result, error)
Wrap a function with a tracing span using the current task runner’s tracer and return the function result. Use WithSpanResult inside a task Execute method. If the context is not a task execution context, the function runs without creating a span.

​
Parameters

​
ctx
context.Context
required
The task execution context.
​
name
string
required
The name of the span.
​
f
func(context.Context) (Result, error)
required
The function to wrap.

​
Returns

The result and error returned by f. 
import (
    "context"
    "fmt"
    "log/slog"

    "github.com/tilebox/tilebox-go/workflows/v1"
)

type ProcessScene struct{}

func (t *ProcessScene) Execute(ctx context.Context) error {
    pixels, err := workflows.WithSpanResult(ctx, "compute-index", func(ctx context.Context) (int, error) {
        // Compute an index here.
        return 42, nil
    })
    if err != nil {
        return fmt.Errorf("failed to compute index: %w", err)
    }

    slog.InfoContext(ctx, "index computed", slog.Int("pixels", pixels))
    return nil
}