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
|
//===--- FixItRewriter.cpp - Fix-It Rewriter Diagnostic Client --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This is a diagnostic client adaptor that performs rewrites as
// suggested by code modification hints attached to diagnostics. It
// then forwards any diagnostics to the adapted diagnostic client.
//
//===----------------------------------------------------------------------===//
#include "clang/Rewrite/FixItRewriter.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Frontend/FrontendDiagnostic.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Path.h"
#include "llvm/ADT/OwningPtr.h"
#include <cstdio>
using namespace clang;
FixItRewriter::FixItRewriter(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
const LangOptions &LangOpts,
FixItOptions *FixItOpts)
: Diags(Diags),
Rewrite(SourceMgr, LangOpts),
FixItOpts(FixItOpts),
NumFailures(0) {
Client = Diags.takeClient();
Diags.setClient(this);
}
FixItRewriter::~FixItRewriter() {
Diags.takeClient();
Diags.setClient(Client);
}
bool FixItRewriter::WriteFixedFile(FileID ID, raw_ostream &OS) {
const RewriteBuffer *RewriteBuf = Rewrite.getRewriteBufferFor(ID);
if (!RewriteBuf) return true;
RewriteBuf->write(OS);
OS.flush();
return false;
}
bool FixItRewriter::WriteFixedFiles() {
if (NumFailures > 0 && !FixItOpts->FixWhatYouCan) {
Diag(FullSourceLoc(), diag::warn_fixit_no_changes);
return true;
}
for (iterator I = buffer_begin(), E = buffer_end(); I != E; ++I) {
const FileEntry *Entry = Rewrite.getSourceMgr().getFileEntryForID(I->first);
std::string Filename = FixItOpts->RewriteFilename(Entry->getName());
std::string Err;
llvm::raw_fd_ostream OS(Filename.c_str(), Err,
llvm::raw_fd_ostream::F_Binary);
if (!Err.empty()) {
Diags.Report(clang::diag::err_fe_unable_to_open_output)
<< Filename << Err;
continue;
}
RewriteBuffer &RewriteBuf = I->second;
RewriteBuf.write(OS);
OS.flush();
}
return false;
}
bool FixItRewriter::IncludeInDiagnosticCounts() const {
return Client ? Client->IncludeInDiagnosticCounts() : true;
}
void FixItRewriter::HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
const Diagnostic &Info) {
// Default implementation (Warnings/errors count).
DiagnosticConsumer::HandleDiagnostic(DiagLevel, Info);
Client->HandleDiagnostic(DiagLevel, Info);
// Skip over any diagnostics that are ignored or notes.
if (DiagLevel <= DiagnosticsEngine::Note)
return;
// Make sure that we can perform all of the modifications we
// in this diagnostic.
bool CanRewrite = Info.getNumFixItHints() > 0;
for (unsigned Idx = 0, Last = Info.getNumFixItHints();
Idx < Last; ++Idx) {
const FixItHint &Hint = Info.getFixItHint(Idx);
if (Hint.RemoveRange.isValid() &&
Rewrite.getRangeSize(Hint.RemoveRange) == -1) {
CanRewrite = false;
break;
}
}
if (!CanRewrite) {
if (Info.getNumFixItHints() > 0)
Diag(Info.getLocation(), diag::note_fixit_in_macro);
// If this was an error, refuse to perform any rewriting.
if (DiagLevel == DiagnosticsEngine::Error ||
DiagLevel == DiagnosticsEngine::Fatal) {
if (++NumFailures == 1)
Diag(Info.getLocation(), diag::note_fixit_unfixed_error);
}
return;
}
bool Failed = false;
for (unsigned Idx = 0, Last = Info.getNumFixItHints();
Idx < Last; ++Idx) {
const FixItHint &Hint = Info.getFixItHint(Idx);
if (Hint.CodeToInsert.empty()) {
// We're removing code.
if (Rewrite.RemoveText(Hint.RemoveRange))
Failed = true;
continue;
}
// We're replacing code.
if (Rewrite.ReplaceText(Hint.RemoveRange.getBegin(),
Rewrite.getRangeSize(Hint.RemoveRange),
Hint.CodeToInsert))
Failed = true;
}
if (Failed) {
++NumFailures;
Diag(Info.getLocation(), diag::note_fixit_failed);
return;
}
Diag(Info.getLocation(), diag::note_fixit_applied);
}
/// \brief Emit a diagnostic via the adapted diagnostic client.
void FixItRewriter::Diag(SourceLocation Loc, unsigned DiagID) {
// When producing this diagnostic, we temporarily bypass ourselves,
// clear out any current diagnostic, and let the downstream client
// format the diagnostic.
Diags.takeClient();
Diags.setClient(Client);
Diags.Clear();
Diags.Report(Loc, DiagID);
Diags.takeClient();
Diags.setClient(this);
}
DiagnosticConsumer *FixItRewriter::clone(DiagnosticsEngine &Diags) const {
return new FixItRewriter(Diags, Diags.getSourceManager(),
Rewrite.getLangOpts(), FixItOpts);
}
FixItOptions::~FixItOptions() {}
|
