method

class_variable_defined?

v1_9_1_378 - Show latest stable - Class: Module

class_variable_defined?(p1)

public

Returns true if the given class variable is defined in obj.

class Fred
  @@foo = 99
end
Fred.class_variable_defined?(:@@foo)    #=> true
Fred.class_variable_defined?(:@@bar)    #=> false

static VALUE
rb_mod_cvar_defined(VALUE obj, VALUE iv)
{
    ID id = rb_to_id(iv);

    if (!rb_is_class_id(id)) {
        rb_name_error(id, "`%s' is not allowed as a class variable name", rb_id2name(id));
    }
    return rb_cvar_defined(obj, id);
}

class_variable_defined?

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