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
|
//===--- ASTSelection.cpp - Clang refactoring library ---------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/Tooling/Refactoring/ASTSelection.h"
#include "clang/AST/LexicallyOrderedRecursiveASTVisitor.h"
#include "clang/Lex/Lexer.h"
using namespace clang;
using namespace tooling;
using ast_type_traits::DynTypedNode;
namespace {
/// Constructs the tree of selected AST nodes that either contain the location
/// of the cursor or overlap with the selection range.
class ASTSelectionFinder
: public LexicallyOrderedRecursiveASTVisitor<ASTSelectionFinder> {
public:
ASTSelectionFinder(SourceRange Selection, FileID TargetFile,
const ASTContext &Context)
: LexicallyOrderedRecursiveASTVisitor(Context.getSourceManager()),
SelectionBegin(Selection.getBegin()),
SelectionEnd(Selection.getBegin() == Selection.getEnd()
? SourceLocation()
: Selection.getEnd()),
TargetFile(TargetFile), Context(Context) {
// The TU decl is the root of the selected node tree.
SelectionStack.push_back(
SelectedASTNode(DynTypedNode::create(*Context.getTranslationUnitDecl()),
SourceSelectionKind::None));
}
Optional<SelectedASTNode> getSelectedASTNode() {
assert(SelectionStack.size() == 1 && "stack was not popped");
SelectedASTNode Result = std::move(SelectionStack.back());
SelectionStack.pop_back();
if (Result.Children.empty())
return None;
return Result;
}
bool TraverseDecl(Decl *D) {
if (isa<TranslationUnitDecl>(D))
return LexicallyOrderedRecursiveASTVisitor::TraverseDecl(D);
if (D->isImplicit())
return true;
// Check if this declaration is written in the file of interest.
const SourceRange DeclRange = D->getSourceRange();
const SourceManager &SM = Context.getSourceManager();
SourceLocation FileLoc;
if (DeclRange.getBegin().isMacroID() && !DeclRange.getEnd().isMacroID())
FileLoc = DeclRange.getEnd();
else
FileLoc = SM.getSpellingLoc(DeclRange.getBegin());
if (SM.getFileID(FileLoc) != TargetFile)
return true;
// FIXME (Alex Lorenz): Add location adjustment for ObjCImplDecls.
SourceSelectionKind SelectionKind =
selectionKindFor(CharSourceRange::getTokenRange(D->getSourceRange()));
SelectionStack.push_back(
SelectedASTNode(DynTypedNode::create(*D), SelectionKind));
LexicallyOrderedRecursiveASTVisitor::TraverseDecl(D);
popAndAddToSelectionIfSelected(SelectionKind);
if (DeclRange.getEnd().isValid() &&
SM.isBeforeInTranslationUnit(SelectionEnd.isValid() ? SelectionEnd
: SelectionBegin,
DeclRange.getEnd())) {
// Stop early when we've reached a declaration after the selection.
return false;
}
return true;
}
bool TraverseStmt(Stmt *S) {
if (!S)
return true;
// FIXME (Alex Lorenz): Improve handling for macro locations.
SourceSelectionKind SelectionKind =
selectionKindFor(CharSourceRange::getTokenRange(S->getSourceRange()));
SelectionStack.push_back(
SelectedASTNode(DynTypedNode::create(*S), SelectionKind));
LexicallyOrderedRecursiveASTVisitor::TraverseStmt(S);
popAndAddToSelectionIfSelected(SelectionKind);
return true;
}
private:
void popAndAddToSelectionIfSelected(SourceSelectionKind SelectionKind) {
SelectedASTNode Node = std::move(SelectionStack.back());
SelectionStack.pop_back();
if (SelectionKind != SourceSelectionKind::None || !Node.Children.empty())
SelectionStack.back().Children.push_back(std::move(Node));
}
SourceSelectionKind selectionKindFor(CharSourceRange Range) {
SourceLocation End = Range.getEnd();
const SourceManager &SM = Context.getSourceManager();
if (Range.isTokenRange())
End = Lexer::getLocForEndOfToken(End, 0, SM, Context.getLangOpts());
if (!SourceLocation::isPairOfFileLocations(Range.getBegin(), End))
return SourceSelectionKind::None;
if (!SelectionEnd.isValid()) {
// Do a quick check when the selection is of length 0.
if (SM.isPointWithin(SelectionBegin, Range.getBegin(), End))
return SourceSelectionKind::ContainsSelection;
return SourceSelectionKind::None;
}
bool HasStart = SM.isPointWithin(SelectionBegin, Range.getBegin(), End);
bool HasEnd = SM.isPointWithin(SelectionEnd, Range.getBegin(), End);
if (HasStart && HasEnd)
return SourceSelectionKind::ContainsSelection;
if (SM.isPointWithin(Range.getBegin(), SelectionBegin, SelectionEnd) &&
SM.isPointWithin(End, SelectionBegin, SelectionEnd))
return SourceSelectionKind::InsideSelection;
// Ensure there's at least some overlap with the 'start'/'end' selection
// types.
if (HasStart && SelectionBegin != End)
return SourceSelectionKind::ContainsSelectionStart;
if (HasEnd && SelectionEnd != Range.getBegin())
return SourceSelectionKind::ContainsSelectionEnd;
return SourceSelectionKind::None;
}
const SourceLocation SelectionBegin, SelectionEnd;
FileID TargetFile;
const ASTContext &Context;
std::vector<SelectedASTNode> SelectionStack;
};
} // end anonymous namespace
Optional<SelectedASTNode>
clang::tooling::findSelectedASTNodes(const ASTContext &Context,
SourceRange SelectionRange) {
assert(SelectionRange.isValid() &&
SourceLocation::isPairOfFileLocations(SelectionRange.getBegin(),
SelectionRange.getEnd()) &&
"Expected a file range");
FileID TargetFile =
Context.getSourceManager().getFileID(SelectionRange.getBegin());
assert(Context.getSourceManager().getFileID(SelectionRange.getEnd()) ==
TargetFile &&
"selection range must span one file");
ASTSelectionFinder Visitor(SelectionRange, TargetFile, Context);
Visitor.TraverseDecl(Context.getTranslationUnitDecl());
return Visitor.getSelectedASTNode();
}
static const char *selectionKindToString(SourceSelectionKind Kind) {
switch (Kind) {
case SourceSelectionKind::None:
return "none";
case SourceSelectionKind::ContainsSelection:
return "contains-selection";
case SourceSelectionKind::ContainsSelectionStart:
return "contains-selection-start";
case SourceSelectionKind::ContainsSelectionEnd:
return "contains-selection-end";
case SourceSelectionKind::InsideSelection:
return "inside";
}
llvm_unreachable("invalid selection kind");
}
static void dump(const SelectedASTNode &Node, llvm::raw_ostream &OS,
unsigned Indent = 0) {
OS.indent(Indent * 2);
if (const Decl *D = Node.Node.get<Decl>()) {
OS << D->getDeclKindName() << "Decl";
if (const auto *ND = dyn_cast<NamedDecl>(D))
OS << " \"" << ND->getNameAsString() << '"';
} else if (const Stmt *S = Node.Node.get<Stmt>()) {
OS << S->getStmtClassName();
}
OS << ' ' << selectionKindToString(Node.SelectionKind) << "\n";
for (const auto &Child : Node.Children)
dump(Child, OS, Indent + 1);
}
void SelectedASTNode::dump(llvm::raw_ostream &OS) const { ::dump(*this, OS); }
|
