rb_str_to_dbl     460 include/ruby/intern.h double rb_str_to_dbl(VALUE, int);
rb_str_to_dbl    2242 object.c       	return DBL2NUM(rb_str_to_dbl(val, Qtrue));
rb_str_to_dbl    3964 string.c           return DBL2NUM(rb_str_to_dbl(str, Qfalse));