SelectorLocationsKind.cpp
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//===--- SelectorLocationsKind.cpp - Kind of selector locations -*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Describes whether the identifier locations for a selector are "standard"
// or not.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/SelectorLocationsKind.h"
#include "clang/AST/Expr.h"
using namespace clang;
static SourceLocation getStandardSelLoc(unsigned Index,
Selector Sel,
bool WithArgSpace,
SourceLocation ArgLoc,
SourceLocation EndLoc) {
unsigned NumSelArgs = Sel.getNumArgs();
if (NumSelArgs == 0) {
assert(Index == 0);
if (EndLoc.isInvalid())
return SourceLocation();
IdentifierInfo *II = Sel.getIdentifierInfoForSlot(0);
unsigned Len = II ? II->getLength() : 0;
return EndLoc.getLocWithOffset(-Len);
}
assert(Index < NumSelArgs);
if (ArgLoc.isInvalid())
return SourceLocation();
IdentifierInfo *II = Sel.getIdentifierInfoForSlot(Index);
unsigned Len = /* selector id */ (II ? II->getLength() : 0) + /* ':' */ 1;
if (WithArgSpace)
++Len;
return ArgLoc.getLocWithOffset(-Len);
}
namespace {
template <typename T>
SourceLocation getArgLoc(T* Arg);
template <>
SourceLocation getArgLoc<Expr>(Expr *Arg) {
return Arg->getBeginLoc();
}
template <>
SourceLocation getArgLoc<ParmVarDecl>(ParmVarDecl *Arg) {
SourceLocation Loc = Arg->getBeginLoc();
if (Loc.isInvalid())
return Loc;
// -1 to point to left paren of the method parameter's type.
return Loc.getLocWithOffset(-1);
}
template <typename T>
SourceLocation getArgLoc(unsigned Index, ArrayRef<T*> Args) {
return Index < Args.size() ? getArgLoc(Args[Index]) : SourceLocation();
}
template <typename T>
SelectorLocationsKind hasStandardSelLocs(Selector Sel,
ArrayRef<SourceLocation> SelLocs,
ArrayRef<T *> Args,
SourceLocation EndLoc) {
// Are selector locations in standard position with no space between args ?
unsigned i;
for (i = 0; i != SelLocs.size(); ++i) {
if (SelLocs[i] != getStandardSelectorLoc(i, Sel, /*WithArgSpace=*/false,
Args, EndLoc))
break;
}
if (i == SelLocs.size())
return SelLoc_StandardNoSpace;
// Are selector locations in standard position with space between args ?
for (i = 0; i != SelLocs.size(); ++i) {
if (SelLocs[i] != getStandardSelectorLoc(i, Sel, /*WithArgSpace=*/true,
Args, EndLoc))
return SelLoc_NonStandard;
}
return SelLoc_StandardWithSpace;
}
} // anonymous namespace
SelectorLocationsKind
clang::hasStandardSelectorLocs(Selector Sel,
ArrayRef<SourceLocation> SelLocs,
ArrayRef<Expr *> Args,
SourceLocation EndLoc) {
return hasStandardSelLocs(Sel, SelLocs, Args, EndLoc);
}
SourceLocation clang::getStandardSelectorLoc(unsigned Index,
Selector Sel,
bool WithArgSpace,
ArrayRef<Expr *> Args,
SourceLocation EndLoc) {
return getStandardSelLoc(Index, Sel, WithArgSpace,
getArgLoc(Index, Args), EndLoc);
}
SelectorLocationsKind
clang::hasStandardSelectorLocs(Selector Sel,
ArrayRef<SourceLocation> SelLocs,
ArrayRef<ParmVarDecl *> Args,
SourceLocation EndLoc) {
return hasStandardSelLocs(Sel, SelLocs, Args, EndLoc);
}
SourceLocation clang::getStandardSelectorLoc(unsigned Index,
Selector Sel,
bool WithArgSpace,
ArrayRef<ParmVarDecl *> Args,
SourceLocation EndLoc) {
return getStandardSelLoc(Index, Sel, WithArgSpace,
getArgLoc(Index, Args), EndLoc);
}