Method: Module.constants

Defined in:
eval.c

.constants ⇒ Array .constants(inherited) ⇒ Array

In the first form, returns an array of the names of all constants accessible from the point of call. This list includes the names of all modules and classes defined in the global scope.

Module.constants.first(4)
   # => [:ARGF, :ARGV, :ArgumentError, :Array]

Module.constants.include?(:SEEK_SET)   # => false

class IO
  Module.constants.include?(:SEEK_SET) # => true
end

The second form calls the instance method constants.

Overloads:



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# File 'eval.c', line 400

static VALUE
rb_mod_s_constants(int argc, VALUE *argv, VALUE mod)
{
    const rb_cref_t *cref = rb_vm_cref();
    VALUE klass;
    VALUE cbase = 0;
    void *data = 0;

    if (argc > 0 || mod != rb_cModule) {
	return rb_mod_constants(argc, argv, mod);
    }

    while (cref) {
	klass = CREF_CLASS(cref);
	if (!CREF_PUSHED_BY_EVAL(cref) &&
	    !NIL_P(klass)) {
	    data = rb_mod_const_at(CREF_CLASS(cref), data);
	    if (!cbase) {
		cbase = klass;
	    }
	}
	cref = CREF_NEXT(cref);
    }

    if (cbase) {
	data = rb_mod_const_of(cbase, data);
    }
    return rb_const_list(data);
}