| // Copyright 2019 The Pigweed 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. |
| |
| #include "pw_preprocessor/concat.h" |
| |
| #include "gtest/gtest.h" |
| #include "pw_preprocessor/util.h" |
| |
| namespace pw { |
| namespace { |
| |
| TEST(Concat, WithoutMacroExpansions) { |
| static_assert(PW_CONCAT() 9000 PW_CONCAT() == 9000); |
| static_assert(PW_CONCAT(1, 2) == 12); |
| static_assert(PW_CONCAT(1, 2, 3, 4) == 1234); |
| static_assert(PW_CONCAT(1, 2, 3, 4, 5) == 12345); |
| static_assert(PW_CONCAT(1, 2, 3, 4, 5, 6) == 123456); |
| static_assert(PW_CONCAT(1, 2, 3, 4, 5, 6, 7) == 1234567); |
| static_assert(PW_CONCAT(1, 2, 3, 4, 5, 6, 7, 8) == 12345678); |
| |
| static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, llu) == 0x345678llu); |
| static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, llu) == 0x3456789llu); |
| static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, llu) == 0x3456789Allu); |
| static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, B, llu) == |
| 0x3456789ABllu); |
| static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, B, C, llu) == |
| 0x3456789ABCllu); |
| static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, llu) == |
| 0x3456789ABCDllu); |
| static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, llu) == |
| 0x3456789ABCDEllu); |
| static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, llu) == |
| 0x3456789ABCDEFllu); |
| static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, F, llu) == |
| 0x3456789ABCDEFFllu); |
| } |
| |
| // Macros which expand out to test that PW_CONCAT properly expands them. |
| #define _PW_TEST_SECTION(x) "section: " x |
| #define _PW_TEST_NUMBER 123 |
| #define _PW_OUTER_MACRO(section_name) \ |
| _PW_TEST_SECTION(PW_STRINGIFY(PW_CONCAT(section_name, _PW_TEST_NUMBER))) |
| |
| #define _PW_WHOSE() my |
| #define _PW_WHAT var |
| |
| TEST(Concat, WithMacroExpansions) { |
| static_assert(PW_CONCAT(_PW_TEST_NUMBER, 5) == 1235); |
| |
| int my_var; |
| EXPECT_EQ(&PW_CONCAT(_PW_WHOSE(), _, _PW_WHAT), &my_var); |
| |
| EXPECT_STREQ(_PW_OUTER_MACRO(what is up), "section: what is up123"); |
| } |
| |
| // Test concatenation up to the maximum supported length. |
| TEST(Concat, MaximumConcatenationLength) { |
| constexpr int value31_234567890123456789012345678901 = 1337; |
| constexpr int value32_2345678901234567890123456789012 = 101010; |
| |
| // clang-format off |
| static_assert(PW_CONCAT(value31_, 2, 3, 4, 5, 6, 7, 8, 9, 0, |
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, |
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, |
| 1) == 1337); |
| |
| static_assert(PW_CONCAT(value32_, 2, 3, 4, 5, 6, 7, 8, 9, 0, |
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, |
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, |
| 1, 2) == 101010); |
| // clang-format on |
| } |
| |
| } // namespace |
| } // namespace pw |