summaryrefslogtreecommitdiff
path: root/compilerplugins/clang/datamembershadow.cxx
blob: c4e9370b36f1f071adcb7f3c71f9a4c71779dd3c (plain)
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
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * 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/.
 */

#include <string>
#include <iostream>
#include <map>
#include <set>

#include "plugin.hxx"
#include "clang/AST/CXXInheritance.h"

/**
 * Check for data member being shadowed.
 *
 * @TODO check for any members in superclass hierarchy with duplicate names,
 *       regardless of their visibility,
 *       more specific names will make the code easier to read
 */
namespace
{

class DataMemberShadow:
    public RecursiveASTVisitor<DataMemberShadow>, public loplugin::Plugin
{
public:
    explicit DataMemberShadow(loplugin::InstantiationData const & data):
        Plugin(data) {}

    virtual void run() override {
        TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
    }

    bool VisitFieldDecl(FieldDecl const *);
};

bool DataMemberShadow::VisitFieldDecl(FieldDecl const * fieldDecl)
{
    if (ignoreLocation(fieldDecl)) {
        return true;
    }
    StringRef aFileName = compiler.getSourceManager().getFilename(
            compiler.getSourceManager().getSpellingLoc(fieldDecl->getLocStart()));

    // FIXME complex stuff to fix later

    if (loplugin::hasPathnamePrefix(aFileName, SRCDIR "/chart2/source/"))
        return true;
    if (loplugin::isSamePathname(aFileName, SRCDIR "/cppcanvas/source/mtfrenderer/emfplus.cxx"))
        return true;
    if (loplugin::isSamePathname(aFileName, SRCDIR "/cui/source/customize/eventdlg.hxx"))
        return true;
    if (loplugin::isSamePathname(aFileName, SRCDIR "/include/sfx2/recentdocsview.hxx"))
        return true;
    if (loplugin::isSamePathname(aFileName, SRCDIR "/include/sfx2/templatelocalview.hxx"))
        return true;
    if (loplugin::isSamePathname(aFileName, SRCDIR "/filter/source/graphicfilter/idxf/dxfentrd.hxx"))
        return true;
    if (loplugin::isSamePathname(aFileName, SRCDIR "/sc/source/ui/vba/vbastyles.hxx"))
        return true;
    if (loplugin::isSamePathname(aFileName, SRCDIR "/sd/inc/Outliner.hxx"))
        return true;
    if (loplugin::isSamePathname(aFileName, SRCDIR "/sd/source/ui/annotations/annotationtag.cxx"))
        return true;
    if (loplugin::isSamePathname(aFileName, SRCDIR "/sd/source/ui/inc/FrameView.hxx")
        || loplugin::isSamePathname(aFileName, SRCDIR "/sd/source/filter/ppt/../../ui/inc/FrameView.hxx"))
        return true;
    if (loplugin::isSamePathname(aFileName, SRCDIR "/sd/source/ui/inc/unopage.hxx"))
        return true;
    if (loplugin::isSamePathname(aFileName, SRCDIR "/store/source/stortree.hxx")
        || loplugin::isSamePathname(aFileName, SRCDIR "/store/source/stordata.hxx"))
        return true;
    if (loplugin::isSamePathname(aFileName, SRCDIR "/sw/source/uibase/inc/dbtree.hxx"))
        return true;

    const CXXRecordDecl* parentCXXRecordDecl = dyn_cast<CXXRecordDecl>(fieldDecl->getDeclContext());
    if (!parentCXXRecordDecl) {
        return true;
    }

    fieldDecl = fieldDecl->getCanonicalDecl();

    auto BaseMatchesCallback = [&](const CXXBaseSpecifier *cxxBaseSpecifier, CXXBasePath& Paths)
    {
        if (!cxxBaseSpecifier->getType().getTypePtr())
            return false;
        const CXXRecordDecl* baseCXXRecordDecl = cxxBaseSpecifier->getType()->getAsCXXRecordDecl();
        if (!baseCXXRecordDecl)
            return false;
        if (baseCXXRecordDecl->isInvalidDecl())
            return false;
        for (const FieldDecl* baseFieldDecl : baseCXXRecordDecl->fields())
        {
            // TODO look for overlaps even with private fields

            if (baseFieldDecl->getAccess() == AS_private
                || !baseFieldDecl->getDeclName().isIdentifier()
                || fieldDecl->getName() != baseFieldDecl->getName()) {
                continue;
            }
            std::string sPath;
            for (CXXBasePathElement const & pathElement : Paths) {
                if (!sPath.empty()) {
                    sPath += "->";
                }
                sPath += pathElement.Class->getNameAsString();
            }
            sPath += "->";
            sPath += baseCXXRecordDecl->getNameAsString();
            report(DiagnosticsEngine::Warning,
                    "data member %0 is shadowing member in superclass, through inheritance path %1",
                    fieldDecl->getLocStart())
                << fieldDecl->getName()
                << sPath
                << fieldDecl->getSourceRange();
            report(DiagnosticsEngine::Note,
                    "superclass member here",
                    baseFieldDecl->getLocStart())
                << baseFieldDecl->getSourceRange();
        }
        return false;
    };

    CXXBasePaths aPaths;
    parentCXXRecordDecl->lookupInBases(BaseMatchesCallback, aPaths);
    return true;
}

loplugin::Plugin::Registration< DataMemberShadow > X("datamembershadow", true);

}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */