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
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#ifndef LO_CLANG_SHARED_PLUGINS
#include <cassert>
#include "compat.hxx"
#include "plugin.hxx"
namespace {
class RedundantInline:
public loplugin::FilteringRewritePlugin<RedundantInline>
{
public:
explicit RedundantInline(loplugin::InstantiationData const & data):
FilteringRewritePlugin(data) {}
void run() override {
if (preRun())
TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
}
bool VisitFunctionDecl(FunctionDecl const * decl) {
if (ignoreLocation(decl)) {
return true;
}
if (!decl->isInlineSpecified()) {
return true;
}
handleImplicitInline(decl) || handleNonExternalLinkage(decl);
return true;
}
private:
bool removeInline(FunctionDecl const * decl, SourceLocation * inlineLoc) {
assert(inlineLoc != nullptr);
assert(inlineLoc->isInvalid());
unsigned n = {}; // avoid -Werror=maybe-uninitialized
auto end = Lexer::getLocForEndOfToken(
compiler.getSourceManager().getExpansionLoc(decl->getEndLoc()), 0,
compiler.getSourceManager(), compiler.getLangOpts());
assert(end.isValid());
for (auto loc = compiler.getSourceManager().getExpansionLoc(
decl->getBeginLoc());
loc != end; loc = loc.getLocWithOffset(std::max<unsigned>(n, 1)))
{
n = Lexer::MeasureTokenLength(
loc, compiler.getSourceManager(), compiler.getLangOpts());
StringRef s(compiler.getSourceManager().getCharacterData(loc), n);
//TODO: see compilerplugins/clang/override.cxx:
if (s.startswith("\\\n")) {
s = s.drop_front(2);
}
if (s == "inline") {
if (!compiler.getSourceManager().isMacroArgExpansion(loc)) {
*inlineLoc = loc;
}
break;
} else if (s == "#") {
// Hard to pick the right 'inline' in code like
//
// #if 1
// static
// #else
// inline
// #endif
// inline void f() {}
//
// so just give up once a preprocessing directive is seen:
break;
}
}
if (rewriter != nullptr && inlineLoc->isValid()) {
for (auto loc = inlineLoc->getLocWithOffset(
std::max<unsigned>(n, 1));;)
{
assert(loc != end);
unsigned n2 = Lexer::MeasureTokenLength(
loc, compiler.getSourceManager(), compiler.getLangOpts());
StringRef s(
compiler.getSourceManager().getCharacterData(loc), n2);
//TODO: see compilerplugins/clang/override.cxx:
if (s.startswith("\\\n")) {
s = s.drop_front(2);
}
if (!s.empty()) {
break;
}
n2 = std::max<unsigned>(n2, 1);
n += n2;
loc = loc.getLocWithOffset(n2);
}
if (removeText(*inlineLoc, n, RewriteOptions(RemoveLineIfEmpty))) {
return true;
}
}
return false;
}
SourceLocation unwindTo(SourceLocation const & loc, StringRef name) {
if (!loc.isMacroID()) {
return SourceLocation();
}
auto l = compiler.getSourceManager().getImmediateMacroCallerLoc(loc);
return
(Lexer::getImmediateMacroName(
loc, compiler.getSourceManager(), compiler.getLangOpts())
== name)
? l : unwindTo(l, name);
}
bool isInMacroExpansion(FunctionDecl const * decl, StringRef name) {
auto loc = unwindTo(decl->getBeginLoc(), name);
return loc.isValid() && loc == unwindTo(decl->getEndLoc(), name);
}
bool handleImplicitInline(FunctionDecl const * decl) {
if (!(decl->doesThisDeclarationHaveABody() || decl->isExplicitlyDefaulted())
|| !(decl->getLexicalDeclContext()->isRecord() || decl->isConstexpr()))
{
return false;
}
if (isInMacroExpansion(decl, "Q_OBJECT")) {
return true;
}
SourceLocation inlineLoc;
if (!removeInline(decl, &inlineLoc)) {
report(
DiagnosticsEngine::Warning,
"function definition redundantly declared 'inline'",
inlineLoc.isValid() ? inlineLoc : decl->getBeginLoc())
<< decl->getSourceRange();
}
return true;
}
bool handleNonExternalLinkage(FunctionDecl const * decl) {
if (decl->getLinkageInternal() >= compat::Linkage::Module) {
return false;
}
if (!compiler.getSourceManager().isInMainFile(decl->getLocation())) {
// There *may* be benefit to "static inline" in include files (esp. in C code, where an
// inline function with external linkage still requires an external definition), so
// just ignore those for now:
return true;
}
if (isInMacroExpansion(decl, "G_DEFINE_TYPE")
|| isInMacroExpansion(decl, "G_DEFINE_TYPE_WITH_CODE")
|| isInMacroExpansion(decl, "G_DEFINE_TYPE_WITH_PRIVATE"))
{
return true;
}
SourceLocation inlineLoc;
if (!removeInline(decl, &inlineLoc)) {
report(
DiagnosticsEngine::Warning,
"function has no external linkage but is explicitly declared 'inline'",
inlineLoc.isValid() ? inlineLoc : decl->getBeginLoc())
<< decl->getSourceRange();
}
return true;
}
};
loplugin::Plugin::Registration<RedundantInline> redundantinline("redundantinline");
} // namespace
#endif // LO_CLANG_SHARED_PLUGINS
/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
|
