TestMacroForEach.cpp (1883B)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #include "mozilla/Assertions.h" 8 #include "mozilla/MacroForEach.h" 9 10 #define HELPER_IDENTITY(x) x 11 #define HELPER_IDENTITY_PLUS(x) x + 12 static_assert(MOZ_FOR_EACH(HELPER_IDENTITY_PLUS, (), (10)) 0 == 10, ""); 13 static_assert(MOZ_FOR_EACH(HELPER_IDENTITY_PLUS, (), (1, 1, 1)) 0 == 3, ""); 14 static_assert(MOZ_FOR_EACH_SEPARATED(HELPER_IDENTITY, (+), (), (10)) == 10, ""); 15 static_assert(MOZ_FOR_EACH_SEPARATED(HELPER_IDENTITY, (+), (), (1, 1, 1)) == 3, 16 ""); 17 18 #define HELPER_ONE_PLUS(x) HELPER_IDENTITY_PLUS(1) 19 static_assert(MOZ_FOR_EACH(HELPER_ONE_PLUS, (), ()) 0 == 0, ""); 20 21 #define HELPER_DEFINE_VAR(x) const int test1_##x = x; 22 MOZ_FOR_EACH(HELPER_DEFINE_VAR, (), (10, 20)) 23 static_assert(test1_10 == 10 && test1_20 == 20, ""); 24 25 #define HELPER_DEFINE_VAR2(k, x) const int test2_##x = k + x; 26 MOZ_FOR_EACH(HELPER_DEFINE_VAR2, (5, ), (10, 20)) 27 static_assert(test2_10 == 15 && test2_20 == 25, ""); 28 29 #define HELPER_DEFINE_PARAM(t, n) t n 30 constexpr int test(MOZ_FOR_EACH_SEPARATED(HELPER_DEFINE_PARAM, (, ), (int, ), 31 (a, b, c))) { 32 return a + b + c; 33 } 34 static_assert(test(1, 2, 3) == 6, ""); 35 36 int main() { 37 #define HELPER_IDENTITY_COMMA(k1, k2, x) k1, k2, x, 38 const int a[] = {MOZ_FOR_EACH(HELPER_IDENTITY_COMMA, (1, 2, ), (10, 20, 30))}; 39 MOZ_RELEASE_ASSERT(a[0] == 1 && a[1] == 2 && a[2] == 10 && a[3] == 1 && 40 a[4] == 2 && a[5] == 20 && a[6] == 1 && a[7] == 2 && 41 a[8] == 30, 42 "MOZ_FOR_EACH args enumerated in incorrect order"); 43 return 0; 44 }