errorchain

func CauseTypes ¶

func CauseTypes(err error) []string

CauseTypes returns a bounded, de-duplicated list of useful local error types for transport across an extension boundary. Generic wrappers are omitted; type names use the format produced by reflect.Type.String.

func DeepestNamedType ¶

func DeepestNamedType(err error) string

DeepestNamedType returns the deepest non-generic type name from the chain, skipping wrappers that do not identify an origin. It falls back to the leaf type when every entry is generic and returns "<nil>" for a nil error.

func DeepestNamedTypeFromTypes ¶

func DeepestNamedTypeFromTypes(types []string) string

DeepestNamedTypeFromTypes returns the deepest useful type from a previously captured cause-type list. It returns "<nil>" when no type is available.

func IsGenericWrapper ¶

func IsGenericWrapper(typeName string) bool

IsGenericWrapper reports whether typeName is a generic chain or UX wrapper.

func NormalizeCauseTypes ¶

func NormalizeCauseTypes(types []string) []string

NormalizeCauseTypes bounds and de-duplicates diagnostic labels received from an extension. It returns a fresh slice and never includes generic wrappers. The normalized values remain extension-controlled and are not a privacy guarantee.

func SanitizeTypeName ¶

func SanitizeTypeName(name string) string

SanitizeTypeName converts a Go type name into a telemetry-safe segment.

func Types ¶

func Types(err error) []string

Types returns the wrapped-error type chain (outermost first) as a slice of Go type names. The traversal follows Unwrap() error linearly and walks Unwrap() []error depth-first in slice order. Nil children are skipped and the result is capped at MaxChainLen.

Returns nil for a nil error.