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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
===================================================
Extra Clang Tools 9.0.0 (In-Progress) Release Notes
===================================================
.. contents::
:local:
:depth: 3
Written by the `LLVM Team <https://llvm.org/>`_
.. warning::
These are in-progress notes for the upcoming Extra Clang Tools 9 release.
Release notes for previous releases can be found on
`the Download Page <https://releases.llvm.org/download.html>`_.
Introduction
============
This document contains the release notes for the Extra Clang Tools, part of the
Clang release 9.0.0. Here we describe the status of the Extra Clang Tools in
some detail, including major improvements from the previous release and new
feature work. All LLVM releases may be downloaded from the `LLVM releases web
site <https://llvm.org/releases/>`_.
For more information about Clang or LLVM, including information about
the latest release, please see the `Clang Web Site <https://clang.llvm.org>`_ or
the `LLVM Web Site <https://llvm.org>`_.
Note that if you are reading this file from a Subversion checkout or the
main Clang web page, this document applies to the *next* release, not
the current one. To see the release notes for a specific release, please
see the `releases page <https://llvm.org/releases/>`_.
What's New in Extra Clang Tools 9.0.0?
======================================
Some of the major new features and improvements to Extra Clang Tools are listed
here. Generic improvements to Extra Clang Tools as a whole or to its underlying
infrastructure are described first, followed by tool-specific sections.
Major New Features
------------------
...
Improvements to clangd
----------------------
The improvements are...
Improvements to clang-doc
-------------------------
The improvements are...
Improvements to clang-query
---------------------------
The improvements are...
Improvements to clang-rename
----------------------------
The improvements are...
Improvements to clang-tidy
--------------------------
- New OpenMP module.
For checks specific to `OpenMP <https://www.openmp.org/>`_ API.
- New :doc:`abseil-duration-addition
<clang-tidy/checks/abseil-duration-addition>` check.
Checks for cases where addition should be performed in the ``absl::Time``
domain.
- New :doc:`abseil-duration-conversion-cast
<clang-tidy/checks/abseil-duration-conversion-cast>` check.
Checks for casts of ``absl::Duration`` conversion functions, and recommends
the right conversion function instead.
- New :doc:`abseil-duration-unnecessary-conversion
<clang-tidy/checks/abseil-duration-unnecessary-conversion>` check.
Finds and fixes cases where ``absl::Duration`` values are being converted to
numeric types and back again.
- New :doc:`abseil-time-comparison
<clang-tidy/checks/abseil-time-comparison>` check.
Prefer comparisons in the ``absl::Time`` domain instead of the integer
domain.
- New :doc:`abseil-time-subtraction
<clang-tidy/checks/abseil-time-subtraction>` check.
Finds and fixes ``absl::Time`` subtraction expressions to do subtraction
in the Time domain instead of the numeric domain.
- New :doc:`android-cloexec-pipe
<clang-tidy/checks/android-cloexec-pipe>` check.
This check detects usage of ``pipe()``.
- New :doc:`android-cloexec-pipe2
<clang-tidy/checks/android-cloexec-pipe2>` check.
This checks ensures that ``pipe2()`` is called with the ``O_CLOEXEC`` flag.
- New :doc:`bugprone-branch-clone
<clang-tidy/checks/bugprone-branch-clone>` check.
Checks for repeated branches in ``if/else if/else`` chains, consecutive
repeated branches in ``switch`` statements and indentical true and false
branches in conditional operators.
- New :doc:`bugprone-posix-return
<clang-tidy/checks/bugprone-posix-return>` check.
Checks if any calls to POSIX functions (except ``posix_openpt``) expect negative
return values.
- New :doc:`bugprone-unhandled-self-assignment
<clang-tidy/checks/bugprone-unhandled-self-assignment>` check.
Finds user-defined copy assignment operators which do not protect the code
against self-assignment either by checking self-assignment explicitly or
using the copy-and-swap or the copy-and-move method.
- New :doc:`fuchsia-default-arguments-calls
<clang-tidy/checks/fuchsia-default-arguments-calls>` check.
Warns if a function or method is called with default arguments.
This was previously done by `fuchsia-default-arguments check`, which has been
removed.
- New :doc:`fuchsia-default-arguments-declarations
<clang-tidy/checks/fuchsia-default-arguments-declarations>` check.
Warns if a function or method is declared with default parameters.
This was previously done by `fuchsia-default-arguments check` check, which has
been removed.
- New :doc:`google-objc-avoid-nsobject-new
<clang-tidy/checks/google-objc-avoid-nsobject-new>` check.
Checks for calls to ``+new`` or overrides of it, which are prohibited by the
Google Objective-C style guide.
- New :doc:`google-readability-avoid-underscore-in-googletest-name
<clang-tidy/checks/google-readability-avoid-underscore-in-googletest-name>`
check.
Checks whether there are underscores in googletest test and test case names in
test macros, which is prohibited by the Googletest FAQ.
- New :doc:`llvm-prefer-isa-or-dyn-cast-in-conditionals
<clang-tidy/checks/llvm-prefer-isa-or-dyn-cast-in-conditionals>` check.
Looks at conditionals and finds and replaces cases of ``cast<>``,
which will assert rather than return a null pointer, and
``dyn_cast<>`` where the return value is not captured. Additionally,
finds and replaces cases that match the pattern ``var &&
isa<X>(var)``, where ``var`` is evaluated twice.
- New :doc:`modernize-use-trailing-return-type
<clang-tidy/checks/modernize-use-trailing-return-type>` check.
Rewrites function signatures to use a trailing return type.
- New :doc:`objc-super-self <clang-tidy/checks/objc-super-self>` check.
Finds invocations of ``-self`` on super instances in initializers of
subclasses of ``NSObject`` and recommends calling a superclass initializer
instead.
- New :doc:`openmp-exception-escape
<clang-tidy/checks/openmp-exception-escape>` check.
Analyzes OpenMP Structured Blocks and checks that no exception escapes
out of the Structured Block it was thrown in.
- New :doc:`openmp-use-default-none
<clang-tidy/checks/openmp-use-default-none>` check.
Finds OpenMP directives that are allowed to contain a ``default`` clause,
but either don't specify it or the clause is specified but with the kind
other than ``none``, and suggests to use the ``default(none)`` clause.
- New :doc:`readability-convert-member-functions-to-static
<clang-tidy/checks/readability-convert-member-functions-to-static>` check.
Finds non-static member functions that can be made ``static``.
- New alias :doc:`cert-oop54-cpp
<clang-tidy/checks/cert-oop54-cpp>` to
:doc:`bugprone-unhandled-self-assignment
<clang-tidy/checks/bugprone-unhandled-self-assignment>` was added.
- New alias :doc:`cppcoreguidelines-explicit-virtual-functions
<clang-tidy/checks/cppcoreguidelines-explicit-virtual-functions>` to
:doc:`modernize-use-override
<clang-tidy/checks/modernize-use-override>` was added.
- The :doc:`bugprone-argument-comment
<clang-tidy/checks/bugprone-argument-comment>` now supports
`CommentBoolLiterals`, `CommentIntegerLiterals`, `CommentFloatLiterals`,
`CommentUserDefiniedLiterals`, `CommentStringLiterals`,
`CommentCharacterLiterals` & `CommentNullPtrs` options.
- The :doc:`bugprone-too-small-loop-variable
<clang-tidy/checks/bugprone-too-small-loop-variable>` now supports
`MagnitudeBitsUpperLimit` option. The default value was set to 16,
which greatly reduces warnings related to loops which are unlikely to
cause an actual functional bug.
- Added `UseAssignment` option to :doc:`cppcoreguidelines-pro-type-member-init
<clang-tidy/checks/cppcoreguidelines-pro-type-member-init>`
If set to true, the check will provide fix-its with literal initializers
(``int i = 0;``) instead of curly braces (``int i{};``).
- The `fuchsia-default-arguments` check has been removed.
Warnings of function or method calls and declarations with default arguments
were moved to :doc:`fuchsia-default-arguments-calls
<clang-tidy/checks/fuchsia-default-arguments-calls>` and
:doc:`fuchsia-default-arguments-declarations
<clang-tidy/checks/fuchsia-default-arguments-declarations>` checks
respectively.
- The :doc:`google-runtime-int <clang-tidy/checks/google-runtime-int>`
check has been disabled in Objective-C++.
- The :doc:`modernize-use-override
<clang-tidy/checks/modernize-use-override>` now supports `OverrideSpelling`
and `FinalSpelling` options.
- The :doc:`misc-throw-by-value-catch-by-reference
<clang-tidy/checks/misc-throw-by-value-catch-by-reference>` now supports
`WarnOnLargeObject` and `MaxSize` options to warn on any large trivial
object caught by value.
- The `Acronyms` and `IncludeDefaultAcronyms` options for the
:doc:`objc-property-declaration <clang-tidy/checks/objc-property-declaration>`
check have been removed.
Improvements to include-fixer
-----------------------------
The improvements are...
Improvements to clang-include-fixer
-----------------------------------
The improvements are...
Improvements to modularize
--------------------------
The improvements are...
Improvements to pp-trace
------------------------
- Added a new option `-callbacks` to filter preprocessor callbacks. It replaces
the `-ignore` option.
|
