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author | Hans Wennborg <hans@hanshq.net> | 2019-05-06 09:51:10 +0000 |
---|---|---|
committer | Hans Wennborg <hans@hanshq.net> | 2019-05-06 09:51:10 +0000 |
commit | 06edb03dd121a51d2ea4702e224140252a720c86 (patch) | |
tree | 939bf7451f40c9e3145b6c4ae5f6d30328f0b409 /www | |
parent | 6dab16d8d8d89a49727becbb0d910ddd31983f96 (diff) | |
download | clang-06edb03dd121a51d2ea4702e224140252a720c86.tar.gz |
Revert r359949 "[clang] adding explicit(bool) from c++2a"
This caused Clang to start erroring on the following:
struct S {
template <typename = int> explicit S();
};
struct T : S {};
struct U : T {
U();
};
U::U() {}
$ clang -c /tmp/x.cc
/tmp/x.cc:10:4: error: call to implicitly-deleted default constructor of 'T'
U::U() {}
^
/tmp/x.cc:5:12: note: default constructor of 'T' is implicitly deleted
because base class 'S' has no default constructor
struct T : S {};
^
1 error generated.
See discussion on the cfe-commits email thread.
This also reverts the follow-ups r359966 and r359968.
> this patch adds support for the explicit bool specifier.
>
> Changes:
> - The parsing for the explicit(bool) specifier was added in ParseDecl.cpp.
> - The storage of the explicit specifier was changed. the explicit specifier was stored as a boolean value in the FunctionDeclBitfields and in the DeclSpec class. now it is stored as a PointerIntPair<Expr*, 2> with a flag and a potential expression in CXXConstructorDecl, CXXDeductionGuideDecl, CXXConversionDecl and in the DeclSpec class.
> - Following the AST change, Serialization, ASTMatchers, ASTComparator and ASTPrinter were adapted.
> - Template instantiation was adapted to instantiate the potential expressions of the explicit(bool) specifier When instantiating their associated declaration.
> - The Add*Candidate functions were adapted, they now take a Boolean indicating if the context allowing explicit constructor or conversion function and this boolean is used to remove invalid overloads that required template instantiation to be detected.
> - Test for Semantic and Serialization were added.
>
> This patch is not yet complete. I still need to check that interaction with CTAD and deduction guides is correct. and add more tests for AST operations. But I wanted first feedback.
> Perhaps this patch should be spited in smaller patches, but making each patch testable as a standalone may be tricky.
>
> Patch by Tyker
>
> Differential Revision: https://reviews.llvm.org/D60934
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@360024 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'www')
-rwxr-xr-x | www/cxx_status.html | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/www/cxx_status.html b/www/cxx_status.html index 7d17f7ad66..dd6399da6c 100755 --- a/www/cxx_status.html +++ b/www/cxx_status.html @@ -1002,7 +1002,7 @@ as the draft C++2a standard evolves. <tr> <td><tt>explicit(bool)</tt></td> <td><a href="http://wg21.link/p0892r2">P0892R2</a></td> - <td class="svn" align="center">SVN</td> + <td class="none" align="center">No</td> </tr> <!-- San Diego papers --> <tr> |