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author | Richard Smith <richard-llvm@metafoo.co.uk> | 2012-03-30 20:53:28 +0000 |
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committer | Richard Smith <richard-llvm@metafoo.co.uk> | 2012-03-30 20:53:28 +0000 |
commit | 6c4c36c4ed1007143f5b8655eb68b313a7e12e76 (patch) | |
tree | 0a912935dcb75afa09172e2aabf7b40a71653f2e /lib/Sema/SemaExpr.cpp | |
parent | 0f30a12ce7b3d4d86c9ca9072f587da77c8eef34 (diff) |
PR10217: Provide diagnostics explaining why an implicitly-deleted special
member function is deleted.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@153773 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Sema/SemaExpr.cpp')
-rw-r--r-- | lib/Sema/SemaExpr.cpp | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp index 88ef8cd5d8..97cb647229 100644 --- a/lib/Sema/SemaExpr.cpp +++ b/lib/Sema/SemaExpr.cpp @@ -108,6 +108,25 @@ static AvailabilityResult DiagnoseAvailabilityOfDecl(Sema &S, return Result; } +/// \brief Emit a note explaining that this function is deleted or unavailable. +void Sema::NoteDeletedFunction(FunctionDecl *Decl) { + CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Decl); + + if (Method && Method->isImplicit()) { + CXXSpecialMember CSM = getSpecialMember(Method); + // It is possible for us to no longer be able to determine why the special + // member function was deleted, due to a field or base class having acquired + // a new special member function by the addition of a default argument. + // FIXME: Add a test and a special-case diagnostic for this. + if (CSM != CXXInvalid && + ShouldDeleteSpecialMember(Method, CSM, /*Diagnose=*/true)) + return; + } + + Diag(Decl->getLocation(), diag::note_unavailable_here) + << 1 << Decl->isDeleted(); +} + /// \brief Determine whether the use of this declaration is valid, and /// emit any corresponding diagnostics. /// @@ -151,7 +170,7 @@ bool Sema::DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { if (FD->isDeleted()) { Diag(Loc, diag::err_deleted_function_use); - Diag(D->getLocation(), diag::note_unavailable_here) << 1 << true; + NoteDeletedFunction(FD); return true; } } |