129 lines
4.5 KiB
C++
129 lines
4.5 KiB
C++
//===--- SelectorLocationsKind.cpp - Kind of selector locations -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Describes whether the identifier locations for a selector are "standard"
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// or not.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/SelectorLocationsKind.h"
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#include "clang/AST/Expr.h"
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using namespace clang;
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static SourceLocation getStandardSelLoc(unsigned Index,
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Selector Sel,
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bool WithArgSpace,
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SourceLocation ArgLoc,
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SourceLocation EndLoc) {
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unsigned NumSelArgs = Sel.getNumArgs();
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if (NumSelArgs == 0) {
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assert(Index == 0);
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if (EndLoc.isInvalid())
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return SourceLocation();
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IdentifierInfo *II = Sel.getIdentifierInfoForSlot(0);
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unsigned Len = II ? II->getLength() : 0;
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return EndLoc.getLocWithOffset(-Len);
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}
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assert(Index < NumSelArgs);
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if (ArgLoc.isInvalid())
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return SourceLocation();
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IdentifierInfo *II = Sel.getIdentifierInfoForSlot(Index);
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unsigned Len = /* selector id */ (II ? II->getLength() : 0) + /* ':' */ 1;
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if (WithArgSpace)
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++Len;
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return ArgLoc.getLocWithOffset(-Len);
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}
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namespace {
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template <typename T>
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SourceLocation getArgLoc(T* Arg);
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template <>
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SourceLocation getArgLoc<Expr>(Expr *Arg) {
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return Arg->getLocStart();
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}
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template <>
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SourceLocation getArgLoc<ParmVarDecl>(ParmVarDecl *Arg) {
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SourceLocation Loc = Arg->getLocStart();
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if (Loc.isInvalid())
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return Loc;
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// -1 to point to left paren of the method parameter's type.
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return Loc.getLocWithOffset(-1);
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}
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template <typename T>
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SourceLocation getArgLoc(unsigned Index, ArrayRef<T*> Args) {
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return Index < Args.size() ? getArgLoc(Args[Index]) : SourceLocation();
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}
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template <typename T>
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SelectorLocationsKind hasStandardSelLocs(Selector Sel,
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ArrayRef<SourceLocation> SelLocs,
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ArrayRef<T *> Args,
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SourceLocation EndLoc) {
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// Are selector locations in standard position with no space between args ?
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unsigned i;
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for (i = 0; i != SelLocs.size(); ++i) {
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if (SelLocs[i] != getStandardSelectorLoc(i, Sel, /*WithArgSpace=*/false,
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Args, EndLoc))
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break;
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}
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if (i == SelLocs.size())
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return SelLoc_StandardNoSpace;
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// Are selector locations in standard position with space between args ?
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for (i = 0; i != SelLocs.size(); ++i) {
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if (SelLocs[i] != getStandardSelectorLoc(i, Sel, /*WithArgSpace=*/true,
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Args, EndLoc))
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return SelLoc_NonStandard;
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}
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return SelLoc_StandardWithSpace;
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}
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} // anonymous namespace
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SelectorLocationsKind
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clang::hasStandardSelectorLocs(Selector Sel,
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ArrayRef<SourceLocation> SelLocs,
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ArrayRef<Expr *> Args,
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SourceLocation EndLoc) {
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return hasStandardSelLocs(Sel, SelLocs, Args, EndLoc);
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}
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SourceLocation clang::getStandardSelectorLoc(unsigned Index,
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Selector Sel,
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bool WithArgSpace,
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ArrayRef<Expr *> Args,
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SourceLocation EndLoc) {
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return getStandardSelLoc(Index, Sel, WithArgSpace,
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getArgLoc(Index, Args), EndLoc);
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}
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SelectorLocationsKind
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clang::hasStandardSelectorLocs(Selector Sel,
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ArrayRef<SourceLocation> SelLocs,
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ArrayRef<ParmVarDecl *> Args,
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SourceLocation EndLoc) {
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return hasStandardSelLocs(Sel, SelLocs, Args, EndLoc);
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}
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SourceLocation clang::getStandardSelectorLoc(unsigned Index,
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Selector Sel,
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bool WithArgSpace,
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ArrayRef<ParmVarDecl *> Args,
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SourceLocation EndLoc) {
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return getStandardSelLoc(Index, Sel, WithArgSpace,
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getArgLoc(Index, Args), EndLoc);
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}
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