Scm_BoolClass     103 src/class.c    SCM_DEFINE_BUILTIN_CLASS_SIMPLE(Scm_BoolClass, NULL);
Scm_BoolClass     579 src/gauche.h   SCM_CLASS_DECL(Scm_BoolClass);
Scm_BoolClass     592 src/gauche.h   #define SCM_CLASS_BOOL             (&Scm_BoolClass)