mruby/c 1.2 で実装されているCレベルメソッド（定義箇所の抜粋）

methods.c

  mrbc_define_method(vm, mrbc_class_array, "new", c_array_new);
  mrbc_define_method(vm, mrbc_class_array, "+", c_array_add);
  mrbc_define_method(vm, mrbc_class_array, "[]", c_array_get);
  mrbc_define_method(vm, mrbc_class_array, "at", c_array_get);
  mrbc_define_method(vm, mrbc_class_array, "[]=", c_array_set);
  mrbc_define_method(vm, mrbc_class_array, "<<", c_array_push);
  mrbc_define_method(vm, mrbc_class_array, "clear", c_array_clear);
  mrbc_define_method(vm, mrbc_class_array, "delete_at", c_array_delete_at);
  mrbc_define_method(vm, mrbc_class_array, "empty?", c_array_empty);
  mrbc_define_method(vm, mrbc_class_array, "size", c_array_size);
  mrbc_define_method(vm, mrbc_class_array, "length", c_array_size);
  mrbc_define_method(vm, mrbc_class_array, "count", c_array_size);
  mrbc_define_method(vm, mrbc_class_array, "index", c_array_index);
  mrbc_define_method(vm, mrbc_class_array, "first", c_array_first);
  mrbc_define_method(vm, mrbc_class_array, "last", c_array_last);
  mrbc_define_method(vm, mrbc_class_array, "push", c_array_push);
  mrbc_define_method(vm, mrbc_class_array, "pop", c_array_pop);
  mrbc_define_method(vm, mrbc_class_array, "shift", c_array_shift);
  mrbc_define_method(vm, mrbc_class_array, "unshift", c_array_unshift);
  mrbc_define_method(vm, mrbc_class_array, "dup", c_array_dup);
  mrbc_define_method(vm, mrbc_class_array, "min", c_array_min);
  mrbc_define_method(vm, mrbc_class_array, "max", c_array_max);
  mrbc_define_method(vm, mrbc_class_array, "minmax", c_array_minmax);
  mrbc_define_method(vm, mrbc_class_array, "inspect", c_array_inspect);
  mrbc_define_method(vm, mrbc_class_array, "to_s", c_array_inspect);
  mrbc_define_method(vm, mrbc_class_array, "join", c_array_join);
  
    mrbc_define_method(vm, mrbc_class_hash, "new",	c_hash_new);
    mrbc_define_method(vm, mrbc_class_hash, "[]",		c_hash_get);
    mrbc_define_method(vm, mrbc_class_hash, "[]=",	c_hash_set);
    mrbc_define_method(vm, mrbc_class_hash, "clear",	c_hash_clear);
    mrbc_define_method(vm, mrbc_class_hash, "dup",	c_hash_dup);
    mrbc_define_method(vm, mrbc_class_hash, "delete",	c_hash_delete);
    mrbc_define_method(vm, mrbc_class_hash, "empty?",	c_hash_empty);
    mrbc_define_method(vm, mrbc_class_hash, "has_key?",	c_hash_has_key);
    mrbc_define_method(vm, mrbc_class_hash, "has_value?",	c_hash_has_value);
    mrbc_define_method(vm, mrbc_class_hash, "key",	c_hash_key);
    mrbc_define_method(vm, mrbc_class_hash, "keys",	c_hash_keys);
    mrbc_define_method(vm, mrbc_class_hash, "size",	c_hash_size);
    mrbc_define_method(vm, mrbc_class_hash, "length",	c_hash_size);
    mrbc_define_method(vm, mrbc_class_hash, "count",	c_hash_size);
    mrbc_define_method(vm, mrbc_class_hash, "merge",	c_hash_merge);
    mrbc_define_method(vm, mrbc_class_hash, "merge!",	c_hash_merge_self);
    mrbc_define_method(vm, mrbc_class_hash, "to_h",	c_ineffect);
    mrbc_define_method(vm, mrbc_class_hash, "values",	c_hash_values);
    mrbc_define_method(vm, mrbc_class_hash, "inspect",	c_hash_inspect);
    mrbc_define_method(vm, mrbc_class_hash, "to_s",	c_hash_inspect);
  
  mrbc_define_method(vm, mrbc_class_math, "acos",	c_math_acos);
  mrbc_define_method(vm, mrbc_class_math, "acosh",	c_math_acosh);
  mrbc_define_method(vm, mrbc_class_math, "asin",	c_math_asin);
  mrbc_define_method(vm, mrbc_class_math, "asinh",	c_math_asinh);
  mrbc_define_method(vm, mrbc_class_math, "atan",	c_math_atan);
  mrbc_define_method(vm, mrbc_class_math, "atan2",	c_math_atan2);
  mrbc_define_method(vm, mrbc_class_math, "atanh",	c_math_atanh);
  mrbc_define_method(vm, mrbc_class_math, "cbrt",	c_math_cbrt);
  mrbc_define_method(vm, mrbc_class_math, "cos",	c_math_cos);
  mrbc_define_method(vm, mrbc_class_math, "cosh",	c_math_cosh);
  mrbc_define_method(vm, mrbc_class_math, "erf",	c_math_erf);
  mrbc_define_method(vm, mrbc_class_math, "erfc",	c_math_erfc);
  mrbc_define_method(vm, mrbc_class_math, "exp",	c_math_exp);
  mrbc_define_method(vm, mrbc_class_math, "hypot",	c_math_hypot);
  mrbc_define_method(vm, mrbc_class_math, "ldexp",	c_math_ldexp);
  mrbc_define_method(vm, mrbc_class_math, "log",	c_math_log);
  mrbc_define_method(vm, mrbc_class_math, "log10",	c_math_log10);
  mrbc_define_method(vm, mrbc_class_math, "log2",	c_math_log2);
  mrbc_define_method(vm, mrbc_class_math, "sin",	c_math_sin);
  mrbc_define_method(vm, mrbc_class_math, "sinh",	c_math_sinh);
  mrbc_define_method(vm, mrbc_class_math, "sqrt",	c_math_sqrt);
  mrbc_define_method(vm, mrbc_class_math, "tan",	c_math_tan);
  mrbc_define_method(vm, mrbc_class_math, "tanh",	c_math_tanh);

  mrbc_define_method(vm, mrbc_class_fixnum, "[]", c_fixnum_bitref);
  mrbc_define_method(vm, mrbc_class_fixnum, "-@", c_fixnum_negative);
  mrbc_define_method(vm, mrbc_class_fixnum, "**", c_fixnum_power);
  mrbc_define_method(vm, mrbc_class_fixnum, "%", c_fixnum_mod);
  mrbc_define_method(vm, mrbc_class_fixnum, "&", c_fixnum_and);
  mrbc_define_method(vm, mrbc_class_fixnum, "|", c_fixnum_or);
  mrbc_define_method(vm, mrbc_class_fixnum, "^", c_fixnum_xor);
  mrbc_define_method(vm, mrbc_class_fixnum, "~", c_fixnum_not);
  mrbc_define_method(vm, mrbc_class_fixnum, "<<", c_fixnum_lshift);
  mrbc_define_method(vm, mrbc_class_fixnum, ">>", c_fixnum_rshift);
  mrbc_define_method(vm, mrbc_class_fixnum, "abs", c_fixnum_abs);
  mrbc_define_method(vm, mrbc_class_fixnum, "to_i", c_ineffect);
#if MRBC_USE_FLOAT
  mrbc_define_method(vm, mrbc_class_fixnum, "to_f", c_fixnum_to_f);
#endif
  mrbc_define_method(vm, mrbc_class_fixnum, "chr", c_fixnum_chr);
  mrbc_define_method(vm, mrbc_class_fixnum, "inspect", c_fixnum_to_s);
  mrbc_define_method(vm, mrbc_class_fixnum, "to_s", c_fixnum_to_s);

  mrbc_define_method(vm, mrbc_class_float, "-@", c_float_negative);
#if MRBC_USE_MATH
  mrbc_define_method(vm, mrbc_class_float, "**", c_float_power);
#endif
  mrbc_define_method(vm, mrbc_class_float, "abs", c_float_abs);
  mrbc_define_method(vm, mrbc_class_float, "to_i", c_float_to_i);
  mrbc_define_method(vm, mrbc_class_float, "to_f", c_ineffect);
  mrbc_define_method(vm, mrbc_class_float, "inspect", c_float_to_s);
  mrbc_define_method(vm, mrbc_class_float, "to_s", c_float_to_s);
 
  mrbc_define_method(vm, mrbc_class_range, "===", c_range_equal3);
  mrbc_define_method(vm, mrbc_class_range, "first", c_range_first);
  mrbc_define_method(vm, mrbc_class_range, "last", c_range_last);
  mrbc_define_method(vm, mrbc_class_range, "exclude_end?", c_range_exclude_end);
  mrbc_define_method(vm, mrbc_class_range, "inspect", c_range_inspect);
  mrbc_define_method(vm, mrbc_class_range, "to_s", c_range_inspect);
  
  mrbc_define_method(vm, mrbc_class_string, "+",	c_string_add);
  mrbc_define_method(vm, mrbc_class_string, "*",	c_string_mul);
  mrbc_define_method(vm, mrbc_class_string, "size",	c_string_size);
  mrbc_define_method(vm, mrbc_class_string, "length",	c_string_size);
  mrbc_define_method(vm, mrbc_class_string, "to_i",	c_string_to_i);
  mrbc_define_method(vm, mrbc_class_string, "to_s",	c_ineffect);
  mrbc_define_method(vm, mrbc_class_string, "<<",	c_string_append);
  mrbc_define_method(vm, mrbc_class_string, "[]",	c_string_slice);
  mrbc_define_method(vm, mrbc_class_string, "[]=",	c_string_insert);
  mrbc_define_method(vm, mrbc_class_string, "chomp",	c_string_chomp);
  mrbc_define_method(vm, mrbc_class_string, "chomp!",	c_string_chomp_self);
  mrbc_define_method(vm, mrbc_class_string, "dup",	c_string_dup);
  mrbc_define_method(vm, mrbc_class_string, "index",	c_string_index);
  mrbc_define_method(vm, mrbc_class_string, "inspect",	c_string_inspect);
  mrbc_define_method(vm, mrbc_class_string, "ord",	c_string_ord);
  mrbc_define_method(vm, mrbc_class_string, "split",	c_string_split);
  mrbc_define_method(vm, mrbc_class_string, "lstrip",	c_string_lstrip);
  mrbc_define_method(vm, mrbc_class_string, "lstrip!",	c_string_lstrip_self);
  mrbc_define_method(vm, mrbc_class_string, "rstrip",	c_string_rstrip);
  mrbc_define_method(vm, mrbc_class_string, "rstrip!",	c_string_rstrip_self);
  mrbc_define_method(vm, mrbc_class_string, "strip",	c_string_strip);
  mrbc_define_method(vm, mrbc_class_string, "strip!",	c_string_strip_self);
  mrbc_define_method(vm, mrbc_class_string, "to_sym",	c_string_to_sym);
  mrbc_define_method(vm, mrbc_class_string, "intern",	c_string_to_sym);
  mrbc_define_method(vm, mrbc_class_string, "tr",	c_string_tr);
  mrbc_define_method(vm, mrbc_class_string, "tr!",	c_string_tr_self);
  mrbc_define_method(vm, mrbc_class_string, "start_with?", c_string_start_with);
  mrbc_define_method(vm, mrbc_class_string, "end_with?", c_string_end_with);
  mrbc_define_method(vm, mrbc_class_string, "include?",	c_string_include);

#if MRBC_USE_FLOAT
  mrbc_define_method(vm, mrbc_class_string, "to_f",	c_string_to_f);
#endif

  mrbc_define_method(vm, mrbc_class_object, "sprintf",	c_object_sprintf);
  mrbc_define_method(vm, mrbc_class_object, "printf",	c_object_printf);
  mrbc_define_method(vm, mrbc_class_object, "initialize", c_ineffect);
  mrbc_define_method(vm, mrbc_class_object, "alias_method", c_object_alias_method);
  mrbc_define_method(vm, mrbc_class_object, "p", c_object_p);
  mrbc_define_method(vm, mrbc_class_object, "print", c_object_print);
  mrbc_define_method(vm, mrbc_class_object, "puts", c_object_puts);
  mrbc_define_method(vm, mrbc_class_object, "!", c_object_not);
  mrbc_define_method(vm, mrbc_class_object, "!=", c_object_neq);
  mrbc_define_method(vm, mrbc_class_object, "<=>", c_object_compare);
  mrbc_define_method(vm, mrbc_class_object, "===", c_object_equal3);
  mrbc_define_method(vm, mrbc_class_object, "class", c_object_class);
  mrbc_define_method(vm, mrbc_class_object, "new", c_object_new);
  mrbc_define_method(vm, mrbc_class_object, "attr_reader", c_object_attr_reader);
  mrbc_define_method(vm, mrbc_class_object, "attr_accessor", c_object_attr_accessor);
  mrbc_define_method(vm, mrbc_class_object, "is_a?", c_object_kind_of);
  mrbc_define_method(vm, mrbc_class_object, "kind_of?", c_object_kind_of);


#if MRBC_USE_STRING
  mrbc_define_method(vm, mrbc_class_object, "inspect", c_object_to_s);
  mrbc_define_method(vm, mrbc_class_object, "to_s", c_object_to_s);

  mrbc_define_method(vm, mrbc_class_nil, "!", c_nil_false_not);
#if MRBC_USE_STRING
  mrbc_define_method(vm, mrbc_class_nil, "inspect", c_nil_inspect);
  mrbc_define_method(vm, mrbc_class_nil, "to_s", c_nil_to_s);
#endif

  mrbc_define_method(vm, mrbc_class_proc, "call", c_proc_call);
#if MRBC_USE_STRING
  mrbc_define_method(vm, mrbc_class_proc, "inspect", c_proc_to_s);
  mrbc_define_method(vm, mrbc_class_proc, "to_s", c_proc_to_s);
#endif

  // TrueClassには `!` なかったが..
  mrbc_define_method(vm, mrbc_class_false, "!", c_nil_false_not);
#if MRBC_USE_STRING
  mrbc_define_method(vm, mrbc_class_false, "inspect", c_false_to_s);
  mrbc_define_method(vm, mrbc_class_false, "to_s", c_false_to_s);
#endif

  mrbc_define_method(vm, mrbc_class_symbol, "all_symbols", c_all_symbols); // class method?
#if MRBC_USE_STRING
  mrbc_define_method(vm, mrbc_class_symbol, "inspect", c_inspect);
  mrbc_define_method(vm, mrbc_class_symbol, "to_s", c_to_s);
  mrbc_define_method(vm, mrbc_class_symbol, "id2name", c_to_s);
#endif
  mrbc_define_method(vm, mrbc_class_symbol, "to_sym", c_ineffect);