FUeL.go

AttachStackToError attaches a complete errors.StackTrace of the calling goroutine to $err if needed, without AttachStackToError itself and $skip additional frames at the top.

FmtStateToString converts $fs to its fmt.Printf() representation (see unit tests).

FormatNonFormatter forwards $fs and $verb to $nonFormatter.Format() if $nonFormatter is a fmt.Formatter.

GetStack returns a complete errors.StackTrace of the calling goroutine without GetStack itself and $skip additional frames at the top.

NewElasticQueue creates a new ElasticQueue.

NewErrorGroup creates a new ErrorGroup.

NewLimitedQueue creates a new LimitedQueue which runs $concurrency tasks at a time.

SignalsToContext derives $child from $ctx and cancels it on one of $signals.

AdvancedError is a feature-rich error wrapper.

ElasticQueue runs enqueued tasks immediately until context cancellation.

ErrorGroup is a more feature-rich version of golang.org/x/sync/errgroup.Group: * enforces usage of ErrorWithStack, not just error * assembles stack across goroutines * context is forwarded to tasks * optional concurrency limit * stops on context cancellation.

Formatable may be used instead of fmt.Fprintf() for exactly one fmt.Formatter.

LimitedQueue runs enqueued tasks with limited concurrency in FIFO order until context cancellation.