summaryrefslogtreecommitdiffstats
path: root/clang/lib/Sema/Sema.h
diff options
context:
space:
mode:
Diffstat (limited to 'clang/lib/Sema/Sema.h')
-rw-r--r--clang/lib/Sema/Sema.h386
1 files changed, 6 insertions, 380 deletions
diff --git a/clang/lib/Sema/Sema.h b/clang/lib/Sema/Sema.h
index e16bfaa57c8..3e186b2b5be 100644
--- a/clang/lib/Sema/Sema.h
+++ b/clang/lib/Sema/Sema.h
@@ -93,6 +93,7 @@ namespace clang {
class FunctionProtoType;
class CXXBasePaths;
class CXXTemporary;
+ class LookupResult;
/// BlockSemaInfo - When a block is being parsed, this contains information
/// about the block. It is pointed to from Sema::CurBlock.
@@ -1081,382 +1082,12 @@ public:
LookupObjCCategoryImplName
};
- /// @brief Represents the results of name lookup.
- ///
- /// An instance of the LookupResult class captures the results of a
- /// single name lookup, which can return no result (nothing found),
- /// a single declaration, a set of overloaded functions, or an
- /// ambiguity. Use the getKind() method to determine which of these
- /// results occurred for a given lookup.
- ///
- /// Any non-ambiguous lookup can be converted into a single
- /// (possibly NULL) @c NamedDecl* via the getAsSingleDecl() method.
- /// This permits the common-case usage in C and Objective-C where
- /// name lookup will always return a single declaration. Use of
- /// this is largely deprecated; callers should handle the possibility
- /// of multiple declarations.
- class LookupResult {
- public:
- enum LookupResultKind {
- /// @brief No entity found met the criteria.
- NotFound = 0,
-
- /// @brief Name lookup found a single declaration that met the
- /// criteria. getAsDecl will return this declaration.
- Found,
-
- /// @brief Name lookup found a set of overloaded functions that
- /// met the criteria. getAsDecl will turn this set of overloaded
- /// functions into an OverloadedFunctionDecl.
- FoundOverloaded,
-
- /// @brief Name lookup found an unresolvable value declaration
- /// and cannot yet complete. This only happens in C++ dependent
- /// contexts with dependent using declarations.
- FoundUnresolvedValue,
-
- /// @brief Name lookup results in an ambiguity; use
- /// getAmbiguityKind to figure out what kind of ambiguity
- /// we have.
- Ambiguous
- };
-
- enum AmbiguityKind {
- /// Name lookup results in an ambiguity because multiple
- /// entities that meet the lookup criteria were found in
- /// subobjects of different types. For example:
- /// @code
- /// struct A { void f(int); }
- /// struct B { void f(double); }
- /// struct C : A, B { };
- /// void test(C c) {
- /// c.f(0); // error: A::f and B::f come from subobjects of different
- /// // types. overload resolution is not performed.
- /// }
- /// @endcode
- AmbiguousBaseSubobjectTypes,
-
- /// Name lookup results in an ambiguity because multiple
- /// nonstatic entities that meet the lookup criteria were found
- /// in different subobjects of the same type. For example:
- /// @code
- /// struct A { int x; };
- /// struct B : A { };
- /// struct C : A { };
- /// struct D : B, C { };
- /// int test(D d) {
- /// return d.x; // error: 'x' is found in two A subobjects (of B and C)
- /// }
- /// @endcode
- AmbiguousBaseSubobjects,
-
- /// Name lookup results in an ambiguity because multiple definitions
- /// of entity that meet the lookup criteria were found in different
- /// declaration contexts.
- /// @code
- /// namespace A {
- /// int i;
- /// namespace B { int i; }
- /// int test() {
- /// using namespace B;
- /// return i; // error 'i' is found in namespace A and A::B
- /// }
- /// }
- /// @endcode
- AmbiguousReference,
-
- /// Name lookup results in an ambiguity because an entity with a
- /// tag name was hidden by an entity with an ordinary name from
- /// a different context.
- /// @code
- /// namespace A { struct Foo {}; }
- /// namespace B { void Foo(); }
- /// namespace C {
- /// using namespace A;
- /// using namespace B;
- /// }
- /// void test() {
- /// C::Foo(); // error: tag 'A::Foo' is hidden by an object in a
- /// // different namespace
- /// }
- /// @endcode
- AmbiguousTagHiding
- };
-
- enum RedeclarationKind {
- NotForRedeclaration,
- ForRedeclaration
- };
-
- /// A little identifier for flagging temporary lookup results.
- enum TemporaryToken {
- Temporary
- };
-
- typedef llvm::SmallVector<NamedDecl*, 4> DeclsTy;
- typedef DeclsTy::const_iterator iterator;
-
- LookupResult(Sema &SemaRef, DeclarationName Name, SourceLocation NameLoc,
- LookupNameKind LookupKind,
- RedeclarationKind Redecl = NotForRedeclaration)
- : ResultKind(NotFound),
- Paths(0),
- SemaRef(SemaRef),
- Name(Name),
- NameLoc(NameLoc),
- LookupKind(LookupKind),
- IDNS(0),
- Redecl(Redecl != NotForRedeclaration),
- HideTags(true),
- Diagnose(Redecl == NotForRedeclaration)
- {}
-
- /// Creates a temporary lookup result, initializing its core data
- /// using the information from another result. Diagnostics are always
- /// disabled.
- LookupResult(TemporaryToken _, const LookupResult &Other)
- : ResultKind(NotFound),
- Paths(0),
- SemaRef(Other.SemaRef),
- Name(Other.Name),
- NameLoc(Other.NameLoc),
- LookupKind(Other.LookupKind),
- IDNS(Other.IDNS),
- Redecl(Other.Redecl),
- HideTags(Other.HideTags),
- Diagnose(false)
- {}
-
- ~LookupResult() {
- if (Diagnose) diagnose();
- if (Paths) deletePaths(Paths);
- }
-
- /// Gets the name to look up.
- DeclarationName getLookupName() const {
- return Name;
- }
-
- /// Gets the kind of lookup to perform.
- LookupNameKind getLookupKind() const {
- return LookupKind;
- }
-
- /// True if this lookup is just looking for an existing declaration.
- bool isForRedeclaration() const {
- return Redecl;
- }
-
- /// Sets whether tag declarations should be hidden by non-tag
- /// declarations during resolution. The default is true.
- void setHideTags(bool Hide) {
- HideTags = Hide;
- }
-
- /// The identifier namespace of this lookup. This information is
- /// private to the lookup routines.
- unsigned getIdentifierNamespace() const {
- assert(IDNS);
- return IDNS;
- }
-
- void setIdentifierNamespace(unsigned NS) {
- IDNS = NS;
- }
-
- bool isAmbiguous() const {
- return getResultKind() == Ambiguous;
- }
-
- LookupResultKind getResultKind() const {
- sanity();
- return ResultKind;
- }
-
- AmbiguityKind getAmbiguityKind() const {
- assert(isAmbiguous());
- return Ambiguity;
- }
-
- iterator begin() const { return Decls.begin(); }
- iterator end() const { return Decls.end(); }
-
- /// \brief Return true if no decls were found
- bool empty() const { return Decls.empty(); }
-
- /// \brief Return the base paths structure that's associated with
- /// these results, or null if none is.
- CXXBasePaths *getBasePaths() const {
- return Paths;
- }
-
- /// \brief Add a declaration to these results.
- void addDecl(NamedDecl *D) {
- Decls.push_back(D);
- ResultKind = Found;
- }
-
- /// \brief Add all the declarations from another set of lookup
- /// results.
- void addAllDecls(const LookupResult &Other) {
- Decls.append(Other.begin(), Other.end());
- ResultKind = Found;
- }
-
- /// \brief Hides a set of declarations.
- template <class NamedDeclSet> void hideDecls(const NamedDeclSet &Set) {
- unsigned I = 0, N = Decls.size();
- while (I < N) {
- if (Set.count(Decls[I]))
- Decls[I] = Decls[--N];
- else
- I++;
- }
- Decls.set_size(N);
- }
-
- /// \brief Resolves the kind of the lookup, possibly hiding decls.
- ///
- /// This should be called in any environment where lookup might
- /// generate multiple lookup results.
- void resolveKind();
-
- /// \brief Fetch this as an unambiguous single declaration
- /// (possibly an overloaded one).
- ///
- /// This is deprecated; users should be written to handle
- /// ambiguous and overloaded lookups.
- NamedDecl *getAsSingleDecl(ASTContext &Context) const;
-
- /// \brief Fetch the unique decl found by this lookup. Asserts
- /// that one was found.
- ///
- /// This is intended for users who have examined the result kind
- /// and are certain that there is only one result.
- NamedDecl *getFoundDecl() const {
- assert(getResultKind() == Found
- && "getFoundDecl called on non-unique result");
- return Decls[0]->getUnderlyingDecl();
- }
-
- /// \brief Asks if the result is a single tag decl.
- bool isSingleTagDecl() const {
- return getResultKind() == Found && isa<TagDecl>(getFoundDecl());
- }
-
- /// \brief Make these results show that the name was found in
- /// base classes of different types.
- ///
- /// The given paths object is copied and invalidated.
- void setAmbiguousBaseSubobjectTypes(CXXBasePaths &P);
-
- /// \brief Make these results show that the name was found in
- /// distinct base classes of the same type.
- ///
- /// The given paths object is copied and invalidated.
- void setAmbiguousBaseSubobjects(CXXBasePaths &P);
-
- /// \brief Make these results show that the name was found in
- /// different contexts and a tag decl was hidden by an ordinary
- /// decl in a different context.
- void setAmbiguousQualifiedTagHiding() {
- setAmbiguous(AmbiguousTagHiding);
- }
-
- /// \brief Clears out any current state.
- void clear() {
- ResultKind = NotFound;
- Decls.clear();
- if (Paths) deletePaths(Paths);
- Paths = NULL;
- }
-
- /// \brief Clears out any current state and re-initializes for a
- /// different kind of lookup.
- void clear(LookupNameKind Kind) {
- clear();
- LookupKind = Kind;
- }
-
- void print(llvm::raw_ostream &);
-
- /// Suppress the diagnostics that would normally fire because of this
- /// lookup. This happens during (e.g.) redeclaration lookups.
- void suppressDiagnostics() {
- Diagnose = false;
- }
-
- /// Sets a 'context' source range.
- void setContextRange(SourceRange SR) {
- NameContextRange = SR;
- }
-
- /// Gets the source range of the context of this name; for C++
- /// qualified lookups, this is the source range of the scope
- /// specifier.
- SourceRange getContextRange() const {
- return NameContextRange;
- }
-
- /// Gets the location of the identifier. This isn't always defined:
- /// sometimes we're doing lookups on synthesized names.
- SourceLocation getNameLoc() const {
- return NameLoc;
- }
-
- private:
- void diagnose() {
- if (isAmbiguous())
- SemaRef.DiagnoseAmbiguousLookup(*this);
- }
-
- void setAmbiguous(AmbiguityKind AK) {
- ResultKind = Ambiguous;
- Ambiguity = AK;
- }
-
- void addDeclsFromBasePaths(const CXXBasePaths &P);
-
- // Sanity checks.
- void sanity() const {
- assert(ResultKind != NotFound || Decls.size() == 0);
- assert(ResultKind != Found || Decls.size() == 1);
- assert(ResultKind == NotFound || ResultKind == Found ||
- ResultKind == FoundUnresolvedValue ||
- (ResultKind == Ambiguous && Ambiguity == AmbiguousBaseSubobjects)
- || Decls.size() > 1);
- assert((Paths != NULL) == (ResultKind == Ambiguous &&
- (Ambiguity == AmbiguousBaseSubobjectTypes ||
- Ambiguity == AmbiguousBaseSubobjects)));
- }
-
- static void deletePaths(CXXBasePaths *);
-
- // Results.
- LookupResultKind ResultKind;
- AmbiguityKind Ambiguity; // ill-defined unless ambiguous
- DeclsTy Decls;
- CXXBasePaths *Paths;
-
- // Parameters.
- Sema &SemaRef;
- DeclarationName Name;
- SourceLocation NameLoc;
- SourceRange NameContextRange;
- LookupNameKind LookupKind;
- unsigned IDNS; // ill-defined until set by lookup
- bool Redecl;
-
- /// \brief True if tag declarations should be hidden if non-tags
- /// are present
- bool HideTags;
-
- bool Diagnose;
+ enum RedeclarationKind {
+ NotForRedeclaration,
+ ForRedeclaration
};
private:
- typedef llvm::SmallVector<LookupResult, 3> LookupResultsVecTy;
-
bool CppLookupName(LookupResult &R, Scope *S);
public:
@@ -1497,12 +1128,8 @@ public:
/// ambiguity and overloaded.
NamedDecl *LookupSingleName(Scope *S, DeclarationName Name,
LookupNameKind NameKind,
- LookupResult::RedeclarationKind Redecl
- = LookupResult::NotForRedeclaration) {
- LookupResult R(*this, Name, SourceLocation(), NameKind, Redecl);
- LookupName(R, S);
- return R.getAsSingleDecl(Context);
- }
+ RedeclarationKind Redecl
+ = NotForRedeclaration);
bool LookupName(LookupResult &R, Scope *S,
bool AllowBuiltinCreation = false);
bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx);
@@ -4063,7 +3690,6 @@ private:
void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex);
};
-
//===--------------------------------------------------------------------===//
// Typed version of Parser::ExprArg (smart pointer for wrapping Expr pointers).
template <typename T>
OpenPOWER on IntegriCloud