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87 lines
3.3 KiB
87 lines
3.3 KiB
// Copyright 2019 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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#include "pw_preprocessor/concat.h"
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#include "pw_preprocessor/util.h"
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#include "pw_unit_test/framework.h"
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namespace pw {
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namespace {
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TEST(Concat, WithoutMacroExpansions) {
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static_assert(PW_CONCAT() 9000 PW_CONCAT() == 9000);
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static_assert(PW_CONCAT(1, 2) == 12);
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static_assert(PW_CONCAT(1, 2, 3, 4) == 1234);
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static_assert(PW_CONCAT(1, 2, 3, 4, 5) == 12345);
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static_assert(PW_CONCAT(1, 2, 3, 4, 5, 6) == 123456);
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static_assert(PW_CONCAT(1, 2, 3, 4, 5, 6, 7) == 1234567);
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static_assert(PW_CONCAT(1, 2, 3, 4, 5, 6, 7, 8) == 12345678);
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static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, llu) == 0x345678llu);
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static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, llu) == 0x3456789llu);
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static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, llu) == 0x3456789Allu);
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static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, B, llu) ==
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0x3456789ABllu);
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static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, B, C, llu) ==
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0x3456789ABCllu);
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static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, llu) ==
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0x3456789ABCDllu);
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static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, llu) ==
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0x3456789ABCDEllu);
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static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, llu) ==
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0x3456789ABCDEFllu);
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static_assert(PW_CONCAT(0x, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, F, llu) ==
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0x3456789ABCDEFFllu);
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}
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// Macros which expand out to test that PW_CONCAT properly expands them.
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#define _PW_TEST_SECTION(x) "section: " x
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#define _PW_TEST_NUMBER 123
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#define _PW_OUTER_MACRO(section_name) \
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_PW_TEST_SECTION(PW_STRINGIFY(PW_CONCAT(section_name, _PW_TEST_NUMBER)))
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#define _PW_WHOSE() my
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#define _PW_WHAT var
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TEST(Concat, WithMacroExpansions) {
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static_assert(PW_CONCAT(_PW_TEST_NUMBER, 5) == 1235);
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int my_var;
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EXPECT_EQ(&PW_CONCAT(_PW_WHOSE(), _, _PW_WHAT), &my_var);
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EXPECT_STREQ(_PW_OUTER_MACRO(what is up), "section: what is up123");
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}
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// Test concatenation up to the maximum supported length.
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TEST(Concat, MaximumConcatenationLength) {
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constexpr int value31_234567890123456789012345678901 = 1337;
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constexpr int value32_2345678901234567890123456789012 = 101010;
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// clang-format off
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static_assert(PW_CONCAT(value31_, 2, 3, 4, 5, 6, 7, 8, 9, 0,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 0,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 0,
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1) == 1337);
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static_assert(PW_CONCAT(value32_, 2, 3, 4, 5, 6, 7, 8, 9, 0,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 0,
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1, 2, 3, 4, 5, 6, 7, 8, 9, 0,
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1, 2) == 101010);
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// clang-format on
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}
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} // namespace
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} // namespace pw
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