SCM_CLASS_WEAK_VECTOR 3059 src/class.c        CINIT(SCM_CLASS_WEAK_VECTOR,      "<weak-vector>");
SCM_CLASS_WEAK_VECTOR 1667 src/gauche.h   #define SCM_WEAK_VECTOR_P(obj)  SCM_XTYPEP(obj, SCM_CLASS_WEAK_VECTOR)
SCM_CLASS_WEAK_VECTOR   89 src/weak.c         SCM_SET_CLASS(v, SCM_CLASS_WEAK_VECTOR);