1 //===- llvm/unittest/ADT/MakeUniqueTest.cpp - make_unique unit tests ------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/ADT/STLExtras.h" 11 #include "gtest/gtest.h" 12 13 using namespace llvm; 14 15 namespace { 16 17 // Ensure that there is a default constructor and we can test for a null 18 // function_ref. 19 TEST(FunctionRefTest, Null) { 20 function_ref<int()> F; 21 EXPECT_FALSE(F); 22 23 auto L = [] { return 1; }; 24 F = L; 25 EXPECT_TRUE(F); 26 27 F = {}; 28 EXPECT_FALSE(F); 29 } 30 31 // Ensure that copies of a function_ref copy the underlying state rather than 32 // causing one function_ref to chain to the next. 33 TEST(FunctionRefTest, Copy) { 34 auto A = [] { return 1; }; 35 auto B = [] { return 2; }; 36 function_ref<int()> X = A; 37 function_ref<int()> Y = X; 38 X = B; 39 EXPECT_EQ(1, Y()); 40 } 41 42 } 43
