blob: 30f16cbddcbcd383e9c5ab1469ae007646ff457d (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
//===--- pointer_arith.cc - test input file for iwyu ----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// IWYU_ARGS: -I .
// Pointer arithmetic requires the full type of the pointed-to type, because
// type size is material to the calculations.
#include "tests/cxx/direct.h"
// IWYU: IndirectClass is...*indirect.h
IndirectClass ic1, ic2;
void PointerArithmetic() {
// IWYU: IndirectClass needs a declaration
IndirectClass* p1 = &ic1;
// IWYU: IndirectClass needs a declaration
IndirectClass* p2 = &ic2;
// All the pointer arithmetic below require the full type.
// Pointer minus pointer (should really use ptrdiff_t, but I don't want to
// have to include headers for it)
// IWYU: IndirectClass is...*indirect.h
long x = p2 - p1;
// Pointer minus offset
// IWYU: IndirectClass is...*indirect.h
void* p3 = p1 - 20;
// Pointer decrement
// IWYU: IndirectClass is...*indirect.h
p1 -= 10;
// Pointer plus offset
// IWYU: IndirectClass is...*indirect.h
p3 = p1 + 100;
// Pointer increment
// IWYU: IndirectClass is...*indirect.h
p1 += 100;
}
// Make sure pointer arithmetic with builtins does not yield IWYU warnings.
void BuiltinPointerArithmetic() {
char c = 0;
char* pc = &c;
pc -= 10;
pc += 100;
long x = pc - &c;
int i = 0;
int* pi = &i;
pi -= 20;
pi += 200;
x = pi - &i;
}
/**** IWYU_SUMMARY
tests/cxx/pointer_arith.cc should add these lines:
#include "tests/cxx/indirect.h"
tests/cxx/pointer_arith.cc should remove these lines:
- #include "tests/cxx/direct.h" // lines XX-XX
The full include-list for tests/cxx/pointer_arith.cc:
#include "tests/cxx/indirect.h" // for IndirectClass
***** IWYU_SUMMARY */
|
