mirror of
https://github.com/capstone-engine/llvm-capstone.git
synced 2025-03-04 16:41:43 +00:00
Move named cast helpers out of Sema, as Chris requested. This requirse making a few functions public that weren't before.
llvm-svn: 58906
This commit is contained in:
Sebastian Redl
parent
09991ada2d
commit
842ef52ff3
@ -266,7 +266,7 @@ public:
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bool UnwrapSimilarPointerTypes(QualType& T1, QualType& T2);
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virtual TypeResult ActOnTypeName(Scope *S, Declarator &D);
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private:
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//===--------------------------------------------------------------------===//
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// Symbol table / Decl tracking callbacks: SemaDecl.cpp.
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//
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@ -329,7 +329,7 @@ private:
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SourceLocation EqualLoc, ExprTy *Val);
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virtual void ActOnEnumBody(SourceLocation EnumLoc, DeclTy *EnumDecl,
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DeclTy **Elements, unsigned NumElements);
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private:
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DeclContext *getDCParent(DeclContext *DC);
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/// Set the current declaration context until it gets popped.
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@ -738,41 +738,6 @@ public:
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SourceLocation LParenLoc, ExprTy *E,
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SourceLocation RParenLoc);
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private:
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// Helpers for ActOnCXXCasts
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void CheckConstCast(Expr *&SrcExpr, QualType DestType,
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const SourceRange &OpRange, const SourceRange &DestRange);
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void CheckReinterpretCast(Expr *&SrcExpr, QualType DestType,
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const SourceRange &OpRange,
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const SourceRange &DestRange);
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void CheckStaticCast(Expr *&SrcExpr, QualType DestType,
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const SourceRange &OpRange);
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void CheckDynamicCast(Expr *&SrcExpr, QualType DestType,
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const SourceRange &OpRange,
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const SourceRange &DestRange);
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enum TryStaticCastResult {
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TSC_NotApplicable, ///< The cast method is not applicable.
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TSC_Success, ///< The cast method is appropriate and successful.
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TSC_Failed ///< The cast method is appropriate, but failed. A
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///< diagnostic has been emitted.
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};
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bool CastsAwayConstness(QualType SrcType, QualType DestType);
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TryStaticCastResult TryStaticReferenceDowncast(Expr *SrcExpr,
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QualType DestType,
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const SourceRange &OpRange);
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TryStaticCastResult TryStaticPointerDowncast(QualType SrcType,
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QualType DestType,
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const SourceRange &OpRange);
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TryStaticCastResult TryStaticDowncast(QualType SrcType, QualType DestType,
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const SourceRange &OpRange,
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QualType OrigSrcType,
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QualType OrigDestType);
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TryStaticCastResult TryStaticImplicitCast(Expr *SrcExpr, QualType DestType,
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const SourceRange &OpRange);
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public:
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//// ActOnCXXThis - Parse 'this' pointer.
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virtual ExprResult ActOnCXXThis(SourceLocation ThisLoc);
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@ -1022,7 +987,6 @@ public:
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SourceLocation LParenLoc,
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SourceLocation RParenLoc);
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private:
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/// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit
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/// cast. If there is already an implicit cast, merge into the existing one.
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void ImpCastExprToType(Expr *&Expr, QualType Type);
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@ -20,6 +20,39 @@
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#include <set>
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using namespace clang;
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enum TryStaticCastResult {
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TSC_NotApplicable, ///< The cast method is not applicable.
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TSC_Success, ///< The cast method is appropriate and successful.
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TSC_Failed ///< The cast method is appropriate, but failed. A
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///< diagnostic has been emitted.
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};
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static void CheckConstCast(Sema &Self, Expr *&SrcExpr, QualType DestType,
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const SourceRange &OpRange,
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const SourceRange &DestRange);
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static void CheckReinterpretCast(Sema &Self, Expr *&SrcExpr, QualType DestType,
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const SourceRange &OpRange,
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const SourceRange &DestRange);
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static void CheckStaticCast(Sema &Self, Expr *&SrcExpr, QualType DestType,
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const SourceRange &OpRange);
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static void CheckDynamicCast(Sema &Self, Expr *&SrcExpr, QualType DestType,
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const SourceRange &OpRange,
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const SourceRange &DestRange);
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static bool CastsAwayConstness(Sema &Self, QualType SrcType, QualType DestType);
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static TryStaticCastResult TryStaticReferenceDowncast(
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Sema &Self, Expr *SrcExpr, QualType DestType, const SourceRange &OpRange);
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static TryStaticCastResult TryStaticPointerDowncast(
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Sema &Self, QualType SrcType, QualType DestType, const SourceRange &OpRange);
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static TryStaticCastResult TryStaticDowncast(Sema &Self, QualType SrcType,
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QualType DestType,
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const SourceRange &OpRange,
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QualType OrigSrcType,
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QualType OrigDestType);
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static TryStaticCastResult TryStaticImplicitCast(Sema &Self, Expr *SrcExpr,
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QualType DestType,
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const SourceRange &OpRange);
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/// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's.
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Action::ExprResult
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Sema::ActOnCXXNamedCast(SourceLocation OpLoc, tok::TokenKind Kind,
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@ -36,22 +69,22 @@ Sema::ActOnCXXNamedCast(SourceLocation OpLoc, tok::TokenKind Kind,
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default: assert(0 && "Unknown C++ cast!");
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case tok::kw_const_cast:
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CheckConstCast(Ex, DestType, OpRange, DestRange);
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CheckConstCast(*this, Ex, DestType, OpRange, DestRange);
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return new CXXConstCastExpr(DestType.getNonReferenceType(), Ex,
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DestType, OpLoc);
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case tok::kw_dynamic_cast:
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CheckDynamicCast(Ex, DestType, OpRange, DestRange);
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CheckDynamicCast(*this, Ex, DestType, OpRange, DestRange);
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return new CXXDynamicCastExpr(DestType.getNonReferenceType(), Ex,
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DestType, OpLoc);
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case tok::kw_reinterpret_cast:
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CheckReinterpretCast(Ex, DestType, OpRange, DestRange);
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CheckReinterpretCast(*this, Ex, DestType, OpRange, DestRange);
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return new CXXReinterpretCastExpr(DestType.getNonReferenceType(), Ex,
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DestType, OpLoc);
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case tok::kw_static_cast:
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CheckStaticCast(Ex, DestType, OpRange);
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CheckStaticCast(*this, Ex, DestType, OpRange);
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return new CXXStaticCastExpr(DestType.getNonReferenceType(), Ex,
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DestType, OpLoc);
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}
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@ -65,30 +98,30 @@ Sema::ActOnCXXNamedCast(SourceLocation OpLoc, tok::TokenKind Kind,
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/// const char *str = "literal";
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/// legacy_function(const_cast\<char*\>(str));
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void
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Sema::CheckConstCast(Expr *&SrcExpr, QualType DestType,
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const SourceRange &OpRange, const SourceRange &DestRange)
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CheckConstCast(Sema &Self, Expr *&SrcExpr, QualType DestType,
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const SourceRange &OpRange, const SourceRange &DestRange)
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{
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QualType OrigDestType = DestType, OrigSrcType = SrcExpr->getType();
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DestType = Context.getCanonicalType(DestType);
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DestType = Self.Context.getCanonicalType(DestType);
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QualType SrcType = SrcExpr->getType();
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if (const ReferenceType *DestTypeTmp = DestType->getAsReferenceType()) {
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if (SrcExpr->isLvalue(Context) != Expr::LV_Valid) {
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if (SrcExpr->isLvalue(Self.Context) != Expr::LV_Valid) {
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// Cannot cast non-lvalue to reference type.
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Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_rvalue,
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Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_rvalue,
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"const_cast", OrigDestType.getAsString(), SrcExpr->getSourceRange());
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return;
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}
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// C++ 5.2.11p4: An lvalue of type T1 can be [cast] to an lvalue of type T2
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// [...] if a pointer to T1 can be [cast] to the type pointer to T2.
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DestType = Context.getPointerType(DestTypeTmp->getPointeeType());
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SrcType = Context.getPointerType(SrcType);
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DestType = Self.Context.getPointerType(DestTypeTmp->getPointeeType());
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SrcType = Self.Context.getPointerType(SrcType);
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} else {
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// C++ 5.2.11p1: Otherwise, the result is an rvalue and the
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// lvalue-to-rvalue, array-to-pointer, and function-to-pointer standard
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// conversions are performed on the expression.
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DefaultFunctionArrayConversion(SrcExpr);
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Self.DefaultFunctionArrayConversion(SrcExpr);
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SrcType = SrcExpr->getType();
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}
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@ -96,7 +129,7 @@ Sema::CheckConstCast(Expr *&SrcExpr, QualType DestType,
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// Cannot cast to non-pointer, non-reference type. Note that, if DestType
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// was a reference type, we converted it to a pointer above.
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// C++ 5.2.11p3: For two pointer types [...]
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Diag(OpRange.getBegin(), diag::err_bad_const_cast_dest,
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Self.Diag(OpRange.getBegin(), diag::err_bad_const_cast_dest,
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OrigDestType.getAsString(), DestRange);
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return;
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}
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@ -104,11 +137,11 @@ Sema::CheckConstCast(Expr *&SrcExpr, QualType DestType,
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// Cannot cast direct function pointers.
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// C++ 5.2.11p2: [...] where T is any object type or the void type [...]
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// T is the ultimate pointee of source and target type.
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Diag(OpRange.getBegin(), diag::err_bad_const_cast_dest,
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Self.Diag(OpRange.getBegin(), diag::err_bad_const_cast_dest,
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OrigDestType.getAsString(), DestRange);
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return;
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}
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SrcType = Context.getCanonicalType(SrcType);
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SrcType = Self.Context.getCanonicalType(SrcType);
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// Unwrap the pointers. Ignore qualifiers. Terminate early if the types are
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// completely equal.
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@ -117,7 +150,8 @@ Sema::CheckConstCast(Expr *&SrcExpr, QualType DestType,
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// C++ 5.2.11p3 describes the core semantics of const_cast. All cv specifiers
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// in multi-level pointers may change, but the level count must be the same,
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// as must be the final pointee type.
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while (SrcType != DestType && UnwrapSimilarPointerTypes(SrcType, DestType)) {
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while (SrcType != DestType &&
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Self.UnwrapSimilarPointerTypes(SrcType, DestType)) {
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SrcType = SrcType.getUnqualifiedType();
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DestType = DestType.getUnqualifiedType();
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}
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@ -130,13 +164,14 @@ Sema::CheckConstCast(Expr *&SrcExpr, QualType DestType,
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// No more than one level, though, so don't embed this in the unwrap loop
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// above.
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const ConstantArrayType *SrcTypeArr, *DestTypeArr;
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if ((SrcTypeArr = Context.getAsConstantArrayType(SrcType)) &&
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(DestTypeArr = Context.getAsConstantArrayType(DestType)))
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if ((SrcTypeArr = Self.Context.getAsConstantArrayType(SrcType)) &&
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(DestTypeArr = Self.Context.getAsConstantArrayType(DestType)))
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{
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if (SrcTypeArr->getSize() != DestTypeArr->getSize()) {
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// Different array sizes.
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Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_generic, "const_cast",
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OrigDestType.getAsString(), OrigSrcType.getAsString(), OpRange);
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Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_generic,
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"const_cast", OrigDestType.getAsString(), OrigSrcType.getAsString(),
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OpRange);
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return;
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}
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SrcType = SrcTypeArr->getElementType().getUnqualifiedType();
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@ -147,7 +182,7 @@ Sema::CheckConstCast(Expr *&SrcExpr, QualType DestType,
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// Since we're dealing in canonical types, the remainder must be the same.
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if (SrcType != DestType) {
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// Cast between unrelated types.
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Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_generic, "const_cast",
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Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_generic, "const_cast",
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OrigDestType.getAsString(), OrigSrcType.getAsString(), OpRange);
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return;
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}
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@ -159,18 +194,17 @@ Sema::CheckConstCast(Expr *&SrcExpr, QualType DestType,
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/// like this:
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/// char *bytes = reinterpret_cast\<char*\>(int_ptr);
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void
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Sema::CheckReinterpretCast(Expr *&SrcExpr, QualType DestType,
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const SourceRange &OpRange,
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const SourceRange &DestRange)
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CheckReinterpretCast(Sema &Self, Expr *&SrcExpr, QualType DestType,
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const SourceRange &OpRange, const SourceRange &DestRange)
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{
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QualType OrigDestType = DestType, OrigSrcType = SrcExpr->getType();
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DestType = Context.getCanonicalType(DestType);
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DestType = Self.Context.getCanonicalType(DestType);
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QualType SrcType = SrcExpr->getType();
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if (const ReferenceType *DestTypeTmp = DestType->getAsReferenceType()) {
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if (SrcExpr->isLvalue(Context) != Expr::LV_Valid) {
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if (SrcExpr->isLvalue(Self.Context) != Expr::LV_Valid) {
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// Cannot cast non-lvalue to reference type.
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Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_rvalue,
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Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_rvalue,
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"reinterpret_cast", OrigDestType.getAsString(),
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SrcExpr->getSourceRange());
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return;
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@ -180,18 +214,18 @@ Sema::CheckReinterpretCast(Expr *&SrcExpr, QualType DestType,
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// same effect as the conversion *reinterpret_cast<T*>(&x) with the
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// built-in & and * operators.
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// This code does this transformation for the checked types.
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DestType = Context.getPointerType(DestTypeTmp->getPointeeType());
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SrcType = Context.getPointerType(SrcType);
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DestType = Self.Context.getPointerType(DestTypeTmp->getPointeeType());
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SrcType = Self.Context.getPointerType(SrcType);
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} else {
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// C++ 5.2.10p1: [...] the lvalue-to-rvalue, array-to-pointer, and
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// function-to-pointer standard conversions are performed on the
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// expression v.
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DefaultFunctionArrayConversion(SrcExpr);
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Self.DefaultFunctionArrayConversion(SrcExpr);
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SrcType = SrcExpr->getType();
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}
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// Canonicalize source for comparison.
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SrcType = Context.getCanonicalType(SrcType);
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SrcType = Self.Context.getCanonicalType(SrcType);
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bool destIsPtr = DestType->isPointerType();
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bool srcIsPtr = SrcType->isPointerType();
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@ -199,8 +233,9 @@ Sema::CheckReinterpretCast(Expr *&SrcExpr, QualType DestType,
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// Except for std::nullptr_t->integer, which is not supported yet, and
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// lvalue->reference, which is handled above, at least one of the two
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// arguments must be a pointer.
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Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_generic, "reinterpret_cast",
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OrigDestType.getAsString(), OrigSrcType.getAsString(), OpRange);
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Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_generic,
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"reinterpret_cast", OrigDestType.getAsString(), OrigSrcType.getAsString(),
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OpRange);
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return;
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}
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@ -220,8 +255,9 @@ Sema::CheckReinterpretCast(Expr *&SrcExpr, QualType DestType,
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assert(srcIsPtr && "One type must be a pointer");
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// C++ 5.2.10p4: A pointer can be explicitly converted to any integral
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// type large enough to hold it.
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if (Context.getTypeSize(SrcType) > Context.getTypeSize(DestType)) {
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Diag(OpRange.getBegin(), diag::err_bad_reinterpret_cast_small_int,
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if (Self.Context.getTypeSize(SrcType) >
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Self.Context.getTypeSize(DestType)) {
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Self.Diag(OpRange.getBegin(), diag::err_bad_reinterpret_cast_small_int,
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OrigDestType.getAsString(), DestRange);
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}
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return;
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@ -237,14 +273,15 @@ Sema::CheckReinterpretCast(Expr *&SrcExpr, QualType DestType,
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if (!destIsPtr || !srcIsPtr) {
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// With the valid non-pointer conversions out of the way, we can be even
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// more stringent.
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Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_generic, "reinterpret_cast",
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OrigDestType.getAsString(), OrigSrcType.getAsString(), OpRange);
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Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_generic,
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"reinterpret_cast", OrigDestType.getAsString(), OrigSrcType.getAsString(),
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OpRange);
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return;
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}
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// C++ 5.2.10p2: The reinterpret_cast operator shall not cast away constness.
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if (CastsAwayConstness(SrcType, DestType)) {
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Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_const_away,
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if (CastsAwayConstness(Self, SrcType, DestType)) {
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Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_const_away,
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"reinterpret_cast", OrigDestType.getAsString(), OrigSrcType.getAsString(),
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OpRange);
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return;
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@ -268,8 +305,8 @@ Sema::CheckReinterpretCast(Expr *&SrcExpr, QualType DestType,
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// casting the return value of dlsym() and GetProcAddress().
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// FIXME: Conditionally-supported behavior should be configurable in the
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// TargetInfo or similar.
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if (!getLangOptions().CPlusPlus0x) {
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Diag(OpRange.getBegin(), diag::ext_reinterpret_cast_fn_obj, OpRange);
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if (!Self.getLangOptions().CPlusPlus0x) {
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Self.Diag(OpRange.getBegin(), diag::ext_reinterpret_cast_fn_obj, OpRange);
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}
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return;
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}
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@ -278,8 +315,8 @@ Sema::CheckReinterpretCast(Expr *&SrcExpr, QualType DestType,
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if (DestType->isFunctionPointerType()) {
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// See above.
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if (!getLangOptions().CPlusPlus0x) {
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Diag(OpRange.getBegin(), diag::ext_reinterpret_cast_fn_obj, OpRange);
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if (!Self.getLangOptions().CPlusPlus0x) {
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Self.Diag(OpRange.getBegin(), diag::ext_reinterpret_cast_fn_obj, OpRange);
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}
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return;
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}
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@ -296,7 +333,7 @@ Sema::CheckReinterpretCast(Expr *&SrcExpr, QualType DestType,
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/// 5.2.11p8ff. This is used by the cast checkers. Both arguments
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/// must denote pointer types.
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bool
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Sema::CastsAwayConstness(QualType SrcType, QualType DestType)
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CastsAwayConstness(Sema &Self, QualType SrcType, QualType DestType)
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{
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// Casting away constness is defined in C++ 5.2.11p8 with reference to
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// C++ 4.4.
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@ -308,7 +345,7 @@ Sema::CastsAwayConstness(QualType SrcType, QualType DestType)
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llvm::SmallVector<unsigned, 8> cv1, cv2;
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// Find the qualifications.
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while (UnwrapSimilarPointerTypes(UnwrappedSrcType, UnwrappedDestType)) {
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while (Self.UnwrapSimilarPointerTypes(UnwrappedSrcType, UnwrappedDestType)) {
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cv1.push_back(UnwrappedSrcType.getCVRQualifiers());
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cv2.push_back(UnwrappedDestType.getCVRQualifiers());
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}
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@ -316,27 +353,29 @@ Sema::CastsAwayConstness(QualType SrcType, QualType DestType)
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// Construct void pointers with those qualifiers (in reverse order of
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// unwrapping, of course).
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QualType SrcConstruct = Context.VoidTy;
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QualType DestConstruct = Context.VoidTy;
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QualType SrcConstruct = Self.Context.VoidTy;
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QualType DestConstruct = Self.Context.VoidTy;
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for (llvm::SmallVector<unsigned, 8>::reverse_iterator i1 = cv1.rbegin(),
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i2 = cv2.rbegin();
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i1 != cv1.rend(); ++i1, ++i2)
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{
|
||||
SrcConstruct = Context.getPointerType(SrcConstruct.getQualifiedType(*i1));
|
||||
DestConstruct = Context.getPointerType(DestConstruct.getQualifiedType(*i2));
|
||||
SrcConstruct = Self.Context.getPointerType(
|
||||
SrcConstruct.getQualifiedType(*i1));
|
||||
DestConstruct = Self.Context.getPointerType(
|
||||
DestConstruct.getQualifiedType(*i2));
|
||||
}
|
||||
|
||||
// Test if they're compatible.
|
||||
return SrcConstruct != DestConstruct &&
|
||||
!IsQualificationConversion(SrcConstruct, DestConstruct);
|
||||
!Self.IsQualificationConversion(SrcConstruct, DestConstruct);
|
||||
}
|
||||
|
||||
/// CheckStaticCast - Check that a static_cast\<DestType\>(SrcExpr) is valid.
|
||||
/// Refer to C++ 5.2.9 for details. Static casts are mostly used for making
|
||||
/// implicit conversions explicit and getting rid of data loss warnings.
|
||||
void
|
||||
Sema::CheckStaticCast(Expr *&SrcExpr, QualType DestType,
|
||||
const SourceRange &OpRange)
|
||||
CheckStaticCast(Sema &Self, Expr *&SrcExpr, QualType DestType,
|
||||
const SourceRange &OpRange)
|
||||
{
|
||||
// The order the tests is not entirely arbitrary. There is one conversion
|
||||
// that can be handled in two different ways. Given:
|
||||
@ -358,14 +397,15 @@ Sema::CheckStaticCast(Expr *&SrcExpr, QualType DestType,
|
||||
// C++ 5.2.9p5, reference downcast.
|
||||
// See the function for details.
|
||||
// DR 427 specifies that this is to be applied before paragraph 2.
|
||||
if (TryStaticReferenceDowncast(SrcExpr, DestType, OpRange)
|
||||
if (TryStaticReferenceDowncast(Self, SrcExpr, DestType, OpRange)
|
||||
> TSC_NotApplicable) {
|
||||
return;
|
||||
}
|
||||
|
||||
// C++ 5.2.9p2: An expression e can be explicitly converted to a type T
|
||||
// [...] if the declaration "T t(e);" is well-formed, [...].
|
||||
if (TryStaticImplicitCast(SrcExpr, DestType, OpRange) > TSC_NotApplicable) {
|
||||
if (TryStaticImplicitCast(Self, SrcExpr, DestType, OpRange) >
|
||||
TSC_NotApplicable) {
|
||||
return;
|
||||
}
|
||||
|
||||
@ -378,9 +418,9 @@ Sema::CheckStaticCast(Expr *&SrcExpr, QualType DestType,
|
||||
// The lvalue-to-rvalue, array-to-pointer and function-to-pointer conversions
|
||||
// are applied to the expression.
|
||||
QualType OrigSrcType = SrcExpr->getType();
|
||||
DefaultFunctionArrayConversion(SrcExpr);
|
||||
Self.DefaultFunctionArrayConversion(SrcExpr);
|
||||
|
||||
QualType SrcType = Context.getCanonicalType(SrcExpr->getType());
|
||||
QualType SrcType = Self.Context.getCanonicalType(SrcExpr->getType());
|
||||
|
||||
// Reverse integral promotion/conversion. All such conversions are themselves
|
||||
// again integral promotions or conversions and are thus already handled by
|
||||
@ -400,7 +440,7 @@ Sema::CheckStaticCast(Expr *&SrcExpr, QualType DestType,
|
||||
|
||||
// Reverse pointer upcast. C++ 4.10p3 specifies pointer upcast.
|
||||
// C++ 5.2.9p8 additionally disallows a cast path through virtual inheritance.
|
||||
if (TryStaticPointerDowncast(SrcType, DestType, OpRange)
|
||||
if (TryStaticPointerDowncast(Self, SrcType, DestType, OpRange)
|
||||
> TSC_NotApplicable) {
|
||||
return;
|
||||
}
|
||||
@ -422,7 +462,7 @@ Sema::CheckStaticCast(Expr *&SrcExpr, QualType DestType,
|
||||
// This is definitely the intended conversion, but it might fail due
|
||||
// to a const violation.
|
||||
if (!DestPointee.isAtLeastAsQualifiedAs(SrcPointee)) {
|
||||
Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_const_away,
|
||||
Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_const_away,
|
||||
"static_cast", DestType.getAsString(),
|
||||
OrigSrcType.getAsString(), OpRange);
|
||||
}
|
||||
@ -436,14 +476,14 @@ Sema::CheckStaticCast(Expr *&SrcExpr, QualType DestType,
|
||||
// FIXME: Error reporting could be a lot better. Should store the reason
|
||||
// why every substep failed and, at the end, select the most specific and
|
||||
// report that.
|
||||
Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_generic, "static_cast",
|
||||
Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_generic, "static_cast",
|
||||
DestType.getAsString(), OrigSrcType.getAsString(), OpRange);
|
||||
}
|
||||
|
||||
/// Tests whether a conversion according to C++ 5.2.9p5 is valid.
|
||||
Sema::TryStaticCastResult
|
||||
Sema::TryStaticReferenceDowncast(Expr *SrcExpr, QualType DestType,
|
||||
const SourceRange &OpRange)
|
||||
TryStaticCastResult
|
||||
TryStaticReferenceDowncast(Sema &Self, Expr *SrcExpr, QualType DestType,
|
||||
const SourceRange &OpRange)
|
||||
{
|
||||
// C++ 5.2.9p5: An lvalue of type "cv1 B", where B is a class type, can be
|
||||
// cast to type "reference to cv2 D", where D is a class derived from B,
|
||||
@ -454,7 +494,7 @@ Sema::TryStaticReferenceDowncast(Expr *SrcExpr, QualType DestType,
|
||||
// variant of this rule, the intent is clearly for it to apply to the this
|
||||
// conversion as well.
|
||||
|
||||
if (SrcExpr->isLvalue(Context) != Expr::LV_Valid) {
|
||||
if (SrcExpr->isLvalue(Self.Context) != Expr::LV_Valid) {
|
||||
return TSC_NotApplicable;
|
||||
}
|
||||
|
||||
@ -464,14 +504,14 @@ Sema::TryStaticReferenceDowncast(Expr *SrcExpr, QualType DestType,
|
||||
}
|
||||
QualType DestPointee = DestReference->getPointeeType();
|
||||
|
||||
return TryStaticDowncast(SrcExpr->getType(), DestPointee, OpRange,
|
||||
return TryStaticDowncast(Self, SrcExpr->getType(), DestPointee, OpRange,
|
||||
SrcExpr->getType(), DestType);
|
||||
}
|
||||
|
||||
/// Tests whether a conversion according to C++ 5.2.9p8 is valid.
|
||||
Sema::TryStaticCastResult
|
||||
Sema::TryStaticPointerDowncast(QualType SrcType, QualType DestType,
|
||||
const SourceRange &OpRange)
|
||||
TryStaticCastResult
|
||||
TryStaticPointerDowncast(Sema &Self, QualType SrcType, QualType DestType,
|
||||
const SourceRange &OpRange)
|
||||
{
|
||||
// C++ 5.2.9p8: An rvalue of type "pointer to cv1 B", where B is a class
|
||||
// type, can be converted to an rvalue of type "pointer to cv2 D", where D
|
||||
@ -491,7 +531,7 @@ Sema::TryStaticPointerDowncast(QualType SrcType, QualType DestType,
|
||||
return TSC_NotApplicable;
|
||||
}
|
||||
|
||||
return TryStaticDowncast(SrcPointer->getPointeeType(),
|
||||
return TryStaticDowncast(Self, SrcPointer->getPointeeType(),
|
||||
DestPointer->getPointeeType(),
|
||||
OpRange, SrcType, DestType);
|
||||
}
|
||||
@ -499,10 +539,10 @@ Sema::TryStaticPointerDowncast(QualType SrcType, QualType DestType,
|
||||
/// TryStaticDowncast - Common functionality of TryStaticReferenceDowncast and
|
||||
/// TryStaticPointerDowncast. Tests whether a static downcast from SrcType to
|
||||
/// DestType, both of which must be canonical, is possible and allowed.
|
||||
Sema::TryStaticCastResult
|
||||
Sema::TryStaticDowncast(QualType SrcType, QualType DestType,
|
||||
const SourceRange &OpRange, QualType OrigSrcType,
|
||||
QualType OrigDestType)
|
||||
TryStaticCastResult
|
||||
TryStaticDowncast(Sema &Self, QualType SrcType, QualType DestType,
|
||||
const SourceRange &OpRange, QualType OrigSrcType,
|
||||
QualType OrigDestType)
|
||||
{
|
||||
// Downcast can only happen in class hierarchies, so we need classes.
|
||||
if (!DestType->isRecordType() || !SrcType->isRecordType()) {
|
||||
@ -511,7 +551,7 @@ Sema::TryStaticDowncast(QualType SrcType, QualType DestType,
|
||||
|
||||
BasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/false,
|
||||
/*DetectVirtual=*/true);
|
||||
if (!IsDerivedFrom(DestType, SrcType, Paths)) {
|
||||
if (!Self.IsDerivedFrom(DestType, SrcType, Paths)) {
|
||||
return TSC_NotApplicable;
|
||||
}
|
||||
|
||||
@ -535,7 +575,7 @@ Sema::TryStaticDowncast(QualType SrcType, QualType DestType,
|
||||
|
||||
// Must preserve cv, as always.
|
||||
if (!DestType.isAtLeastAsQualifiedAs(SrcType)) {
|
||||
Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_const_away,
|
||||
Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_const_away,
|
||||
"static_cast", OrigDestType.getAsString(), OrigSrcType.getAsString(),
|
||||
OpRange);
|
||||
return TSC_Failed;
|
||||
@ -548,7 +588,7 @@ Sema::TryStaticDowncast(QualType SrcType, QualType DestType,
|
||||
// them. Use it to spice up the error message.
|
||||
Paths.clear();
|
||||
Paths.setRecordingPaths(true);
|
||||
IsDerivedFrom(DestType, SrcType, Paths);
|
||||
Self.IsDerivedFrom(DestType, SrcType, Paths);
|
||||
std::string PathDisplayStr;
|
||||
std::set<unsigned> DisplayedPaths;
|
||||
for (BasePaths::paths_iterator Path = Paths.begin();
|
||||
@ -564,7 +604,7 @@ Sema::TryStaticDowncast(QualType SrcType, QualType DestType,
|
||||
}
|
||||
}
|
||||
|
||||
Diag(OpRange.getBegin(), diag::err_ambiguous_base_to_derived_cast,
|
||||
Self.Diag(OpRange.getBegin(), diag::err_ambiguous_base_to_derived_cast,
|
||||
SrcType.getUnqualifiedType().getAsString(),
|
||||
DestType.getUnqualifiedType().getAsString(),
|
||||
PathDisplayStr, OpRange);
|
||||
@ -573,7 +613,7 @@ Sema::TryStaticDowncast(QualType SrcType, QualType DestType,
|
||||
|
||||
if (Paths.getDetectedVirtual() != 0) {
|
||||
QualType VirtualBase(Paths.getDetectedVirtual(), 0);
|
||||
Diag(OpRange.getBegin(), diag::err_static_downcast_via_virtual,
|
||||
Self.Diag(OpRange.getBegin(), diag::err_static_downcast_via_virtual,
|
||||
OrigSrcType.getAsString(), OrigDestType.getAsString(),
|
||||
VirtualBase.getAsString(), OpRange);
|
||||
return TSC_Failed;
|
||||
@ -589,14 +629,15 @@ Sema::TryStaticDowncast(QualType SrcType, QualType DestType,
|
||||
///
|
||||
/// An expression e can be explicitly converted to a type T using a
|
||||
/// @c static_cast if the declaration "T t(e);" is well-formed [...].
|
||||
Sema::TryStaticCastResult
|
||||
Sema::TryStaticImplicitCast(Expr *SrcExpr, QualType DestType,
|
||||
const SourceRange &OpRange)
|
||||
TryStaticCastResult
|
||||
TryStaticImplicitCast(Sema &Self, Expr *SrcExpr, QualType DestType,
|
||||
const SourceRange &OpRange)
|
||||
{
|
||||
if (DestType->isReferenceType()) {
|
||||
// At this point of CheckStaticCast, if the destination is a reference,
|
||||
// this has to work. There is no other way that works.
|
||||
return CheckReferenceInit(SrcExpr, DestType) ? TSC_Failed : TSC_Success;
|
||||
return Self.CheckReferenceInit(SrcExpr, DestType) ?
|
||||
TSC_Failed : TSC_Success;
|
||||
}
|
||||
if (DestType->isRecordType()) {
|
||||
// FIXME: Use an implementation of C++ [over.match.ctor] for this.
|
||||
@ -605,7 +646,8 @@ Sema::TryStaticImplicitCast(Expr *SrcExpr, QualType DestType,
|
||||
|
||||
// FIXME: To get a proper error from invalid conversions here, we need to
|
||||
// reimplement more of this.
|
||||
ImplicitConversionSequence ICS = TryImplicitConversion(SrcExpr, DestType);
|
||||
ImplicitConversionSequence ICS = Self.TryImplicitConversion(
|
||||
SrcExpr, DestType);
|
||||
return ICS.ConversionKind == ImplicitConversionSequence::BadConversion ?
|
||||
TSC_NotApplicable : TSC_Success;
|
||||
}
|
||||
@ -614,12 +656,12 @@ Sema::TryStaticImplicitCast(Expr *SrcExpr, QualType DestType,
|
||||
/// Refer to C++ 5.2.7 for details. Dynamic casts are used mostly for runtime-
|
||||
/// checked downcasts in class hierarchies.
|
||||
void
|
||||
Sema::CheckDynamicCast(Expr *&SrcExpr, QualType DestType,
|
||||
const SourceRange &OpRange,
|
||||
const SourceRange &DestRange)
|
||||
CheckDynamicCast(Sema &Self, Expr *&SrcExpr, QualType DestType,
|
||||
const SourceRange &OpRange,
|
||||
const SourceRange &DestRange)
|
||||
{
|
||||
QualType OrigDestType = DestType, OrigSrcType = SrcExpr->getType();
|
||||
DestType = Context.getCanonicalType(DestType);
|
||||
DestType = Self.Context.getCanonicalType(DestType);
|
||||
|
||||
// C++ 5.2.7p1: T shall be a pointer or reference to a complete class type,
|
||||
// or "pointer to cv void".
|
||||
@ -632,7 +674,7 @@ Sema::CheckDynamicCast(Expr *&SrcExpr, QualType DestType,
|
||||
} else if (DestReference) {
|
||||
DestPointee = DestReference->getPointeeType();
|
||||
} else {
|
||||
Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_ref_or_ptr,
|
||||
Self.Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_ref_or_ptr,
|
||||
OrigDestType.getAsString(), DestRange);
|
||||
return;
|
||||
}
|
||||
@ -642,12 +684,12 @@ Sema::CheckDynamicCast(Expr *&SrcExpr, QualType DestType,
|
||||
assert(DestPointer && "Reference to void is not possible");
|
||||
} else if (DestRecord) {
|
||||
if (!DestRecord->getDecl()->isDefinition()) {
|
||||
Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_incomplete,
|
||||
Self.Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_incomplete,
|
||||
DestPointee.getUnqualifiedType().getAsString(), DestRange);
|
||||
return;
|
||||
}
|
||||
} else {
|
||||
Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_class,
|
||||
Self.Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_class,
|
||||
DestPointee.getUnqualifiedType().getAsString(), DestRange);
|
||||
return;
|
||||
}
|
||||
@ -656,20 +698,20 @@ Sema::CheckDynamicCast(Expr *&SrcExpr, QualType DestType,
|
||||
// complete class type, [...]. If T is a reference type, v shall be an
|
||||
// lvalue of a complete class type, [...].
|
||||
|
||||
QualType SrcType = Context.getCanonicalType(OrigSrcType);
|
||||
QualType SrcType = Self.Context.getCanonicalType(OrigSrcType);
|
||||
QualType SrcPointee;
|
||||
if (DestPointer) {
|
||||
if (const PointerType *SrcPointer = SrcType->getAsPointerType()) {
|
||||
SrcPointee = SrcPointer->getPointeeType();
|
||||
} else {
|
||||
Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_ptr,
|
||||
Self.Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_ptr,
|
||||
OrigSrcType.getAsString(), SrcExpr->getSourceRange());
|
||||
return;
|
||||
}
|
||||
} else {
|
||||
if (SrcExpr->isLvalue(Context) != Expr::LV_Valid) {
|
||||
Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_rvalue, "dynamic_cast",
|
||||
OrigDestType.getAsString(), OpRange);
|
||||
if (SrcExpr->isLvalue(Self.Context) != Expr::LV_Valid) {
|
||||
Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_rvalue,
|
||||
"dynamic_cast", OrigDestType.getAsString(), OpRange);
|
||||
}
|
||||
SrcPointee = SrcType;
|
||||
}
|
||||
@ -677,13 +719,13 @@ Sema::CheckDynamicCast(Expr *&SrcExpr, QualType DestType,
|
||||
const RecordType *SrcRecord = SrcPointee->getAsRecordType();
|
||||
if (SrcRecord) {
|
||||
if (!SrcRecord->getDecl()->isDefinition()) {
|
||||
Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_incomplete,
|
||||
Self.Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_incomplete,
|
||||
SrcPointee.getUnqualifiedType().getAsString(),
|
||||
SrcExpr->getSourceRange());
|
||||
return;
|
||||
}
|
||||
} else {
|
||||
Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_class,
|
||||
Self.Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_class,
|
||||
SrcPointee.getUnqualifiedType().getAsString(),
|
||||
SrcExpr->getSourceRange());
|
||||
return;
|
||||
@ -697,8 +739,9 @@ Sema::CheckDynamicCast(Expr *&SrcExpr, QualType DestType,
|
||||
|
||||
// C++ 5.2.7p1: The dynamic_cast operator shall not cast away constness.
|
||||
if (!DestPointee.isAtLeastAsQualifiedAs(SrcPointee)) {
|
||||
Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_const_away, "dynamic_cast",
|
||||
OrigDestType.getAsString(), OrigSrcType.getAsString(), OpRange);
|
||||
Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_const_away,
|
||||
"dynamic_cast", OrigDestType.getAsString(), OrigSrcType.getAsString(),
|
||||
OpRange);
|
||||
return;
|
||||
}
|
||||
|
||||
@ -710,18 +753,18 @@ Sema::CheckDynamicCast(Expr *&SrcExpr, QualType DestType,
|
||||
|
||||
// C++ 5.2.7p5
|
||||
// Upcasts are resolved statically.
|
||||
if (DestRecord && IsDerivedFrom(SrcPointee, DestPointee)) {
|
||||
CheckDerivedToBaseConversion(SrcPointee, DestPointee, OpRange.getBegin(),
|
||||
OpRange);
|
||||
if (DestRecord && Self.IsDerivedFrom(SrcPointee, DestPointee)) {
|
||||
Self.CheckDerivedToBaseConversion(SrcPointee, DestPointee,
|
||||
OpRange.getBegin(), OpRange);
|
||||
// Diagnostic already emitted on error.
|
||||
return;
|
||||
}
|
||||
|
||||
// C++ 5.2.7p6: Otherwise, v shall be [polymorphic].
|
||||
const RecordDecl *SrcDecl = SrcRecord->getDecl()->getDefinition(Context);
|
||||
const RecordDecl *SrcDecl = SrcRecord->getDecl()->getDefinition(Self.Context);
|
||||
assert(SrcDecl && "Definition missing");
|
||||
if (!cast<CXXRecordDecl>(SrcDecl)->isPolymorphic()) {
|
||||
Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_polymorphic,
|
||||
Self.Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_polymorphic,
|
||||
SrcPointee.getUnqualifiedType().getAsString(), SrcExpr->getSourceRange());
|
||||
}
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user