1 // RUN: %check_clang_tidy %s cppcoreguidelines-narrowing-conversions %t \
2 // RUN: -- -- -target x86_64-unknown-linux -m32
3
4 static_assert(sizeof(int) * 8 == 32, "int is 32-bits");
5 static_assert(sizeof(long) * 8 == 32, "long is 32-bits");
6 static_assert(sizeof(long long) * 8 == 64, "long long is 64-bits");
7
narrow_integer_to_signed_integer_is_not_ok()8 void narrow_integer_to_signed_integer_is_not_ok() {
9 int i; // i.e. int32_t
10 long l; // i.e. int32_t
11 long long ll; // i.e. int64_t
12
13 unsigned int ui; // i.e. uint32_t
14 unsigned long ul; // i.e. uint32_t
15 unsigned long long ull; // i.e. uint64_t
16
17 i = l; // int and long are the same type.
18 i = ll; // int64_t does not fit in an int32_t
19 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: narrowing conversion from 'long long' to signed type 'int' is implementation-defined [cppcoreguidelines-narrowing-conversions]
20 ll = ul; // uint32_t fits into int64_t
21 ll = ull; // uint64_t does not fit in an int64_t
22 // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: narrowing conversion from 'unsigned long long' to signed type 'long long' is implementation-defined [cppcoreguidelines-narrowing-conversions]
23 }
24