#ifdef SCOPE_TRACING
thread_local int ScopeTrace::indent = 0;
-explicit ScopeTrace::ScopeTrace(char const *func) : f(func) {
+ScopeTrace::ScopeTrace(char const *func) : f(func) {
fprintf(stderr, "%lu %*s%s -->\n", pthread_self(), 2 * indent++, "", this->f);
}
ScopeTrace::~ScopeTrace() { fprintf(stderr, "%lu %*s%s <--\n", pthread_self(), 2 * --indent, "", this->f); }