clang 10.0.0git

SelectorLocationsKind.cpp
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1 //===--- SelectorLocationsKind.cpp - Kind of selector locations -*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // Describes whether the identifier locations for a selector are "standard"
10 // or not.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "clang/AST/SelectorLocationsKind.h"
15 #include "clang/AST/Expr.h"
16
17 using namespace clang;
18
19 static SourceLocation getStandardSelLoc(unsigned Index,
20 Selector Sel,
21 bool WithArgSpace,
22 SourceLocation ArgLoc,
23 SourceLocation EndLoc) {
24 unsigned NumSelArgs = Sel.getNumArgs();
25 if (NumSelArgs == 0) {
26 assert(Index == 0);
27 if (EndLoc.isInvalid())
28 return SourceLocation();
29 IdentifierInfo *II = Sel.getIdentifierInfoForSlot(0);
30 unsigned Len = II ? II->getLength() : 0;
31 return EndLoc.getLocWithOffset(-Len);
32 }
33
34 assert(Index < NumSelArgs);
35 if (ArgLoc.isInvalid())
36 return SourceLocation();
37 IdentifierInfo *II = Sel.getIdentifierInfoForSlot(Index);
38 unsigned Len = /* selector id */ (II ? II->getLength() : 0) + /* ':' */ 1;
39 if (WithArgSpace)
40 ++Len;
41 return ArgLoc.getLocWithOffset(-Len);
42 }
43
44 namespace {
45
46 template <typename T>
47 SourceLocation getArgLoc(T* Arg);
48
49 template <>
50 SourceLocation getArgLoc<Expr>(Expr *Arg) {
51 return Arg->getBeginLoc();
52 }
53
54 template <>
55 SourceLocation getArgLoc<ParmVarDecl>(ParmVarDecl *Arg) {
56 SourceLocation Loc = Arg->getBeginLoc();
57 if (Loc.isInvalid())
58 return Loc;
59 // -1 to point to left paren of the method parameter's type.
60 return Loc.getLocWithOffset(-1);
61 }
62
63 template <typename T>
64 SourceLocation getArgLoc(unsigned Index, ArrayRef<T*> Args) {
65 return Index < Args.size() ? getArgLoc(Args[Index]) : SourceLocation();
66 }
67
68 template <typename T>
69 SelectorLocationsKind hasStandardSelLocs(Selector Sel,
70 ArrayRef<SourceLocation> SelLocs,
71 ArrayRef<T *> Args,
72 SourceLocation EndLoc) {
73 // Are selector locations in standard position with no space between args ?
74 unsigned i;
75 for (i = 0; i != SelLocs.size(); ++i) {
76 if (SelLocs[i] != getStandardSelectorLoc(i, Sel, /*WithArgSpace=*/false,
77 Args, EndLoc))
78 break;
79 }
80 if (i == SelLocs.size())
81 return SelLoc_StandardNoSpace;
82
83 // Are selector locations in standard position with space between args ?
84 for (i = 0; i != SelLocs.size(); ++i) {
85 if (SelLocs[i] != getStandardSelectorLoc(i, Sel, /*WithArgSpace=*/true,
86 Args, EndLoc))
87 return SelLoc_NonStandard;
88 }
89
90 return SelLoc_StandardWithSpace;
91 }
92
93 } // anonymous namespace
94
95 SelectorLocationsKind
96 clang::hasStandardSelectorLocs(Selector Sel,
97 ArrayRef<SourceLocation> SelLocs,
98 ArrayRef<Expr *> Args,
99 SourceLocation EndLoc) {
100 return hasStandardSelLocs(Sel, SelLocs, Args, EndLoc);
101 }
102
103 SourceLocation clang::getStandardSelectorLoc(unsigned Index,
104 Selector Sel,
105 bool WithArgSpace,
106 ArrayRef<Expr *> Args,
107 SourceLocation EndLoc) {
108 return getStandardSelLoc(Index, Sel, WithArgSpace,
109 getArgLoc(Index, Args), EndLoc);
110 }
111
112 SelectorLocationsKind
113 clang::hasStandardSelectorLocs(Selector Sel,
114 ArrayRef<SourceLocation> SelLocs,
115 ArrayRef<ParmVarDecl *> Args,
116 SourceLocation EndLoc) {
117 return hasStandardSelLocs(Sel, SelLocs, Args, EndLoc);
118 }
119
120 SourceLocation clang::getStandardSelectorLoc(unsigned Index,
121 Selector Sel,
122 bool WithArgSpace,
123 ArrayRef<ParmVarDecl *> Args,
124 SourceLocation EndLoc) {
125 return getStandardSelLoc(Index, Sel, WithArgSpace,
126 getArgLoc(Index, Args), EndLoc);
127 }
clang::SelLoc_StandardWithSpace
For nullary selectors, immediately before the end: "[foo release]" / "-(void)release;" Or with a spac...
Definition: SelectorLocationsKind.h:41
clang::SourceLocation::getLocWithOffset
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
Definition: SourceLocation.h:132
clang::Selector
Smart pointer class that efficiently represents Objective-C method names.
Definition: IdentifierTable.h:685
clang::SelLoc_NonStandard
Non-standard.
Definition: SelectorLocationsKind.h:29
clang::ParmVarDecl
Represents a parameter to a function.
Definition: Decl.h:1595
clang::IdentifierInfo
One of these records is kept for each identifier that is lexed.
Definition: IdentifierTable.h:57
getStandardSelLoc
static SourceLocation getStandardSelLoc(unsigned Index, Selector Sel, bool WithArgSpace, SourceLocation ArgLoc, SourceLocation EndLoc)
Definition: SelectorLocationsKind.cpp:19
clang::SelectorLocationsKind
SelectorLocationsKind
Whether all locations of the selector identifiers are in a "standard" position.
Definition: SelectorLocationsKind.h:27
llvm::ArrayRef
Definition: LLVM.h:31
clang::IdentifierInfo::getLength
unsigned getLength() const
Efficiently return the length of this identifier info.
Definition: IdentifierTable.h:152
clang::Expr
This represents one expression.
Definition: Expr.h:108
clang::getStandardSelectorLoc
SourceLocation getStandardSelectorLoc(unsigned Index, Selector Sel, bool WithArgSpace, ArrayRef< Expr *> Args, SourceLocation EndLoc)
Get the "standard" location of a selector identifier, e.g: For nullary selectors, immediately before ...
Definition: SelectorLocationsKind.cpp:103
clang::Selector::getNumArgs
unsigned getNumArgs() const
Definition: IdentifierTable.cpp:430
clang::Selector::getIdentifierInfoForSlot
IdentifierInfo * getIdentifierInfoForSlot(unsigned argIndex) const
Retrieve the identifier at a given position in the selector.
Definition: IdentifierTable.cpp:441
clang::SourceLocation
Encodes a location in the source.
Definition: SourceLocation.h:86
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:21
clang::SourceLocation::isInvalid
bool isInvalid() const
Definition: SourceLocation.h:107
Expr.h
clang::SelLoc_StandardNoSpace
For nullary selectors, immediately before the end: "[foo release]" / "-(void)release;" Or immediately...
Definition: SelectorLocationsKind.h:35
SelectorLocationsKind.h
clang::hasStandardSelectorLocs
SelectorLocationsKind hasStandardSelectorLocs(Selector Sel, ArrayRef< SourceLocation > SelLocs, ArrayRef< Expr *> Args, SourceLocation EndLoc)
Returns true if all SelLocs are in a "standard" location.
Definition: SelectorLocationsKind.cpp:96