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1 //===- llvm/unittest/ADT/MakeUniqueTest.cpp - make_unique unit tests ------===//
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2 //
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147
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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83
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "llvm/ADT/STLExtras.h"
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10 #include "gtest/gtest.h"
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11
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12 using namespace llvm;
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13
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14 namespace {
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15
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121
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16 // Ensure that there is a default constructor and we can test for a null
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17 // function_ref.
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18 TEST(FunctionRefTest, Null) {
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19 function_ref<int()> F;
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20 EXPECT_FALSE(F);
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21
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22 auto L = [] { return 1; };
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23 F = L;
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24 EXPECT_TRUE(F);
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25
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26 F = {};
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27 EXPECT_FALSE(F);
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28 }
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29
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83
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30 // Ensure that copies of a function_ref copy the underlying state rather than
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31 // causing one function_ref to chain to the next.
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32 TEST(FunctionRefTest, Copy) {
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33 auto A = [] { return 1; };
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34 auto B = [] { return 2; };
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35 function_ref<int()> X = A;
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36 function_ref<int()> Y = X;
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37 X = B;
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38 EXPECT_EQ(1, Y());
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39 }
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40
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41 }
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