// Copyright 2019 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// -----------------------------------------------------------------------------
// transform_args.h
// -----------------------------------------------------------------------------
//
// This file contains a higher-order macro that "transforms" each element of a
// a variadic argument by a provided secondary macro.
#ifndef ABSL_TYPES_INTERNAL_TRANSFORM_ARGS_H_
#define ABSL_TYPES_INTERNAL_TRANSFORM_ARGS_H_
//
// ABSL_INTERNAL_CAT(a, b)
//
// This macro takes two arguments and concatenates them together via ## after
// expansion.
//
// Example:
//
// ABSL_INTERNAL_CAT(foo_, bar)
//
// Results in:
//
// foo_bar
#define ABSL_INTERNAL_CAT(a, b) ABSL_INTERNAL_CAT_IMPL(a, b)
#define ABSL_INTERNAL_CAT_IMPL(a, b) a##b
//
// ABSL_INTERNAL_TRANSFORM_ARGS(m, ...)
//
// This macro takes another macro as an argument followed by a trailing series
// of additional parameters (up to 32 additional arguments). It invokes the
// passed-in macro once for each of the additional arguments, with the
// expansions separated by commas.
//
// Example:
//
// ABSL_INTERNAL_TRANSFORM_ARGS(MY_MACRO, a, b, c)
//
// Results in:
//
// MY_MACRO(a), MY_MACRO(b), MY_MACRO(c)
//
// TODO(calabrese) Handle no arguments as a special case.
#define ABSL_INTERNAL_TRANSFORM_ARGS(m, ...) \
ABSL_INTERNAL_CAT(ABSL_INTERNAL_TRANSFORM_ARGS, \
ABSL_INTERNAL_NUM_ARGS(__VA_ARGS__)) \
(m, __VA_ARGS__)
#define ABSL_INTERNAL_TRANSFORM_ARGS1(m, a0) m(a0)
#define ABSL_INTERNAL_TRANSFORM_ARGS2(m, a0, a1) m(a0), m(a1)
#define ABSL_INTERNAL_TRANSFORM_ARGS3(m, a0, a1, a2) m(a0), m(a1), m(a2)
#define ABSL_INTERNAL_TRANSFORM_ARGS4(m, a0, a1, a2, a3) \
m(a0), m(a1), m(a2), m(a3)
#define ABSL_INTERNAL_TRANSFORM_ARGS5(m, a0, a1, a2, a3, a4) \
m(a0), m(a1), m(a2), m(a3), m(a4)
#define ABSL_INTERNAL_TRANSFORM_ARGS6(m, a0, a1, a2, a3, a4, a5) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5)
#define ABSL_INTERNAL_TRANSFORM_ARGS7(m, a0, a1, a2, a3, a4, a5, a6) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6)
#define ABSL_INTERNAL_TRANSFORM_ARGS8(m, a0, a1, a2, a3, a4, a5, a6, a7) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7)
#define ABSL_INTERNAL_TRANSFORM_ARGS9(m, a0, a1, a2, a3, a4, a5, a6, a7, a8) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8)
#define ABSL_INTERNAL_TRANSFORM_ARGS10(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9)
#define ABSL_INTERNAL_TRANSFORM_ARGS11(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), m(a10)
#define ABSL_INTERNAL_TRANSFORM_ARGS12(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11)
#define ABSL_INTERNAL_TRANSFORM_ARGS13(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12)
#define ABSL_INTERNAL_TRANSFORM_ARGS14(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12, a13) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13)
#define ABSL_INTERNAL_TRANSFORM_ARGS15(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12, a13, a14) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14)
#define ABSL_INTERNAL_TRANSFORM_ARGS16(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12, a13, a14, a15) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15)
#define ABSL_INTERNAL_TRANSFORM_ARGS17(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12, a13, a14, a15, a16) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16)
#define ABSL_INTERNAL_TRANSFORM_ARGS18(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12, a13, a14, a15, a16, \
a17) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17)
#define ABSL_INTERNAL_TRANSFORM_ARGS19(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12, a13, a14, a15, a16, \
a17, a18) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18)
#define ABSL_INTERNAL_TRANSFORM_ARGS20(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12, a13, a14, a15, a16, \
a17, a18, a19) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
m(a19)
#define ABSL_INTERNAL_TRANSFORM_ARGS21(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12, a13, a14, a15, a16, \
a17, a18, a19, a20) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
m(a19), m(a20)
#define ABSL_INTERNAL_TRANSFORM_ARGS22(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12, a13, a14, a15, a16, \
a17, a18, a19, a20, a21) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
m(a19), m(a20), m(a21)
#define ABSL_INTERNAL_TRANSFORM_ARGS23(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12, a13, a14, a15, a16, \
a17, a18, a19, a20, a21, a22) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
m(a19), m(a20), m(a21), m(a22)
#define ABSL_INTERNAL_TRANSFORM_ARGS24(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12, a13, a14, a15, a16, \
a17, a18, a19, a20, a21, a22, a23) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
m(a19), m(a20), m(a21), m(a22), m(a23)
#define ABSL_INTERNAL_TRANSFORM_ARGS25(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12, a13, a14, a15, a16, \
a17, a18, a19, a20, a21, a22, a23, a24) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
m(a19), m(a20), m(a21), m(a22), m(a23), m(a24)
#define ABSL_INTERNAL_TRANSFORM_ARGS26( \
m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, \
a16, a17, a18, a19, a20, a21, a22, a23, a24, a25) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25)
#define ABSL_INTERNAL_TRANSFORM_ARGS27( \
m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, \
a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26)
#define ABSL_INTERNAL_TRANSFORM_ARGS28( \
m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, \
a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27)
#define ABSL_INTERNAL_TRANSFORM_ARGS29( \
m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, \
a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27), \
m(a28)
#define ABSL_INTERNAL_TRANSFORM_ARGS30( \
m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, \
a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28, a29) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27), \
m(a28), m(a29)
#define ABSL_INTERNAL_TRANSFORM_ARGS31( \
m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, \
a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28, a29, a30) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27), \
m(a28), m(a29), m(a30)
#define ABSL_INTERNAL_TRANSFORM_ARGS32(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
a9, a10, a11, a12, a13, a14, a15, a16, \
a17, a18, a19, a20, a21, a22, a23, a24, \
a25, a26, a27, a28, a29, a30, a31) \
m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27), \
m(a28), m(a29), m(a30), m(a31)
#define ABSL_INTERNAL_NUM_ARGS_IMPL(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
a10, a11, a12, a13, a14, a15, a16, a17, \
a18, a19, a20, a21, a22, a23, a24, a25, \
a26, a27, a28, a29, a30, a31, result, ...) \
result
#define ABSL_INTERNAL_FORCE_EXPANSION(...) __VA_ARGS__
#define ABSL_INTERNAL_NUM_ARGS(...) \
ABSL_INTERNAL_FORCE_EXPANSION(ABSL_INTERNAL_NUM_ARGS_IMPL( \
__VA_ARGS__, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, \
17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, ))
#endif // ABSL_TYPES_INTERNAL_TRANSFORM_ARGS_H_
