inspect

static VALUE
tracepoint_inspect(VALUE self)
{
    rb_tp_t *tp = tpptr(self);
    rb_trace_arg_t *trace_arg = GET_EC()->trace_arg;

    if (trace_arg) {
        switch (trace_arg->event) {
          case RUBY_EVENT_LINE:
            {
                VALUE sym = rb_tracearg_method_id(trace_arg);
                if (NIL_P(sym))
                    goto default_inspect;
                return rb_sprintf("#<TracePoint:%"PRIsVALUE"@%"PRIsVALUE":%d in `%"PRIsVALUE"'>",
                                  rb_tracearg_event(trace_arg),
                                  rb_tracearg_path(trace_arg),
                                  FIX2INT(rb_tracearg_lineno(trace_arg)),
                                  sym);
            }
          case RUBY_EVENT_CALL:
          case RUBY_EVENT_C_CALL:
          case RUBY_EVENT_RETURN:
          case RUBY_EVENT_C_RETURN:
            return rb_sprintf("#<TracePoint:%"PRIsVALUE" `%"PRIsVALUE"'@%"PRIsVALUE":%d>",
                              rb_tracearg_event(trace_arg),
                              rb_tracearg_method_id(trace_arg),
                              rb_tracearg_path(trace_arg),
                              FIX2INT(rb_tracearg_lineno(trace_arg)));
          case RUBY_EVENT_THREAD_BEGIN:
          case RUBY_EVENT_THREAD_END:
            return rb_sprintf("#<TracePoint:%"PRIsVALUE" %"PRIsVALUE">",
                              rb_tracearg_event(trace_arg),
                              rb_tracearg_self(trace_arg));
          default:
          default_inspect:
            return rb_sprintf("#<TracePoint:%"PRIsVALUE"@%"PRIsVALUE":%d>",
                              rb_tracearg_event(trace_arg),
                              rb_tracearg_path(trace_arg),
                              FIX2INT(rb_tracearg_lineno(trace_arg)));
        }
    }
    else {
        return rb_sprintf("#<TracePoint:%s>", tp->tracing ? "enabled" : "disabled");
    }
}