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.
TEST(FunctionRefTest,Null)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.
TEST(FunctionRefTest,Copy)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