This function will be called when an exception is constructed. The user-supplied trace handler will be called if one has been supplied, otherwise no trace will be generated.
.Throwable .TraceInfo _d_traceContext (
void* ptr = null
|ptr||A pointer to the location from which to generate the trace, or null if the trace should be generated from within the trace handler itself.|
An object describing the current calling context or null if no handler is supplied.
Walter Bright, Sean Kelly
Distributed under the Boost Software License 1.0. (See accompanying file LICENSE)