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path: root/lib/Sema/SemaDeclCXX.cpp
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2012-02-18Add a bunch of missing calls to DiagnoseSentinelCalls. ↵Eli Friedman
<rdar://problem/10885993>. This should probably be refactored... but it isn't completely obvious what refactoring is best. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150869 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-18Diagnose uses of deleted destructors and inaccessible defaulted destructors.Richard Smith
We had two separate issues here: firstly, varions functions were assuming that they did not need to perform semantic checks on trivial destructors (this is not true in C++11, where a trivial destructor can nonetheless be private or deleted), and a bunch of DiagnoseUseOfDecl calls were missing for uses of destructors. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150866 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-18Initial refactoring of 'ShouldDeleteSpecialMember', in preparation for providingRichard Smith
decent diagnostics. Finish the work of combining all the 'ShouldDelete' functions into one. In unifying the code, fix a minor bug where an anonymous union with a deleted default constructor as a member of a union wasn't being considered as making the outer union's default constructor deleted. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150862 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-17Rework the Sema/AST/IRgen dance for the lambda closure type'sDouglas Gregor
conversion to function pointer. Rather than having IRgen synthesize the body of this function, we instead introduce a static member function "__invoke" with the same signature as the lambda's operator() in the AST. Sema then generates a body for the conversion to function pointer which simply returns the address of __invoke. This approach makes it easier to evaluate a call to the conversion function as a constant, makes the linkage of the __invoke function follow the normal rules for member functions, and may make life easier down the road if we ever want to constexpr'ify some of lambdas. Note that IR generation is responsible for filling in the body of __invoke (Sema just adds a dummy body), because the body can't generally be expressed in C++. Eli, please review! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150783 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16Implicitly define a lambda's conversion functions (to functionDouglas Gregor
pointers and block pointers). We use dummy definitions to keep the invariant that an implicit, used definition has a body; IR generation will substitute the actual contents, since they can't be represented as C++. For the block pointer case, compute the copy-initialization needed to capture the lambda object in the block, which IR generation will need later. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150645 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15When overload resolution picks an implicitly-deleted special memberDouglas Gregor
function, provide a specialized diagnostic that indicates the kind of special member function (default constructor, copy assignment operator, etc.) and that it was implicitly deleted. Add a hook where we can provide more detailed information later. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150611 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-14Implement C++ core issue 974, which permits default arguments forDouglas Gregor
lambda expressions. Because these issue was pulled back from Ready status at the Kona meeting, we still emit an ExtWarn when using default arguments for lambda expressions. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150519 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-14Generalize -Wempty-body: warn when statement body is empty (closes: PR11329)Dmitri Gribenko
* if, switch, range-based for: warn if semicolon is on the same line. * for, while: warn if semicolon is on the same line and either next statement is compound statement or next statement has more indentation. Replacing the semicolon with {} or moving the semicolon to the next line will always silence the warning. Tests from SemaCXX/if-empty-body.cpp merged into SemaCXX/warn-empty-body.cpp. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150515 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-14Use a simpler (and more efficient) pattern to pad vectors.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150475 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-14Fix another issue introduced by the proposed wording for core issue 1358: sinceRichard Smith
the instantiation of a constexpr function temploid is now always constexpr, a defaulted constexpr function temploid is often ill-formed by the rule in [dcl.fct.def.default]p2 that an explicitly-defaulted constexpr function must have a constexpr implicit definition. To avoid making loads of completely reasonable code ill-formed, do not apply that rule to templates. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150453 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-13Update constexpr implementation to match CWG's chosen approach for core issuesRichard Smith
1358, 1360, 1452 and 1453. - Instantiations of constexpr functions are always constexpr. This removes the need for separate declaration/definition checking, which is now gone. - This makes it possible for a constexpr function to be virtual, if they are only dependently virtual. Virtual calls to such functions are not constant expressions. - Likewise, it's now possible for a literal type to have virtual base classes. A constexpr constructor for such a type cannot actually produce a constant expression, though, so add a special-case diagnostic for a constructor call to such a type rather than trying to evaluate it. - Classes with trivial default constructors (for which value initialization can produce a fully-initialized value) are considered literal types. - Classes with volatile members are not literal types. - constexpr constructors can be members of non-literal types. We do not yet use static initialization for global objects constructed in this way. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150359 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-12Lambdas have a deleted default constructor and a deleted copyDouglas Gregor
assignment operator, per C++ [expr.prim.lambda]p19. Make it so. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150345 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-12Change the way we store initialization kinds so that all direct inits can ↵Sebastian Redl
distinguish between list and parens form. This allows us to correctly diagnose the last test cases from litb. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150343 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-11Represent C++ direct initializers as ParenListExprs before semantic analysisSebastian Redl
instead of having a special-purpose function. - ActOnCXXDirectInitializer, which was mostly duplication of AddInitializerToDecl (leading e.g. to PR10620, which Eli fixed a few days ago), is dropped completely. - MultiInitializer, which was an ugly hack I added, is dropped again. - We now have the infrastructure in place to distinguish between int x = {1}; int x({1}); int x{1}; -- VarDecl now has getInitStyle(), which indicates which of the above was used. -- CXXConstructExpr now has a flag to indicate that it represents list- initialization, although this is not yet used. - InstantiateInitializer was renamed to SubstInitializer and simplified. - ActOnParenOrParenListExpr has been replaced by ActOnParenListExpr, which always produces a ParenListExpr. Placed that so far failed to convert that back to a ParenExpr containing comma operators have been fixed. I'm pretty sure I could have made a crashing test case before this. The end result is a (I hope) considerably cleaner design of initializers. More importantly, the fact that I can now distinguish between the various initialization kinds means that I can get the tricky generalized initializer test cases Johannes Schaub supplied to work. (This is not yet done.) This commit passed self-host, with the resulting compiler passing the tests. I hope it doesn't break more complicated code. It's a pretty big change, but one that I feel is necessary. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150318 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-10Implement C++11 [expr.lambda.prim]p13, which prohibits lambdas inDouglas Gregor
default arguments if in fact those lambdas capture any entity. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150282 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-09Make sure a variable with a C++ direct initializer triggers jump scope ↵Eli Friedman
checking. Fixes PR10620 / <rdar://problem/9958362> . git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150204 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-09DR1359: A constexpr constructor does not need to initialize an empty struct orRichard Smith
empty union. This still rejects anonymous member structs or unions which only contain such empty class types, pending standard wording defining exactly what an empty class type is. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150157 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-09Don't complain about the lack of a constructor for a lambda expression. They ↵Douglas Gregor
are constructed in different ways git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150136 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-08Implement the agreed resolution to DR1457: a signed left shift of a 1 bit intoRichard Smith
the sign bit doesn't have undefined behavior, but a signed left shift of a 1 bit out of the sign bit still does. As promised to Howard :) The suppression of the potential constant expression checking in system headers is also removed, since the problem it was working around is gone. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150059 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-06Canonicalize the base class used in the nested-name-specifier of a generatedManuel Klimek
assignment operator. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149909 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-06Removed redundant location info from ElaboratedTypeLoc / DependentNameLoc / ↵Abramo Bagnara
DependentTSTLoc. Uniformed names referencing elaborated keyword. No intended functionality changes. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149889 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-05constexpr: Implement DR1358: An instantiation of a constexpr function whichRichard Smith
can't produce a constant expression is not ill-formed (so long as some instantiation of that function can produce a constant expression). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149802 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-05Basic: import SmallString<> into clang namespaceDylan Noblesmith
(I was going to fix the TODO about DenseMap too, but that would break self-host right now. See PR11922.) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149799 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-04A useful approximation of initializer list constructors.Sebastian Redl
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149792 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-04Move a method from IdentifierTable.h out of line and remove the SmallString ↵Benjamin Kramer
include. Fix all the transitive include users. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149783 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-04In C++11 mode, when an integral constant expression is desired and we have aRichard Smith
value of class type, look for a unique conversion operator converting to integral or unscoped enumeration type and use that. Implements [expr.const]p5. Sema::VerifyIntegerConstantExpression now performs the conversion and returns the converted result. Some important callers of Expr::isIntegralConstantExpr have been switched over to using it (including all of those required for C++11 conformance); this switch brings a side-benefit of improved diagnostics and, in several cases, simpler code. However, some language extensions and attributes have not been moved across and will not perform implicit conversions on constant expressions of literal class type where an ICE is required. In passing, fix static_assert to perform a contextual conversion to bool on its argument. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149776 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-04constexpr:Richard Smith
The recent support for potential constant expressions exposed a bug in the implementation of libstdc++4.6, where numeric_limits<int>::min() is defined as (int)1 << 31, which isn't a constant expression. Disable the 'constexpr function never produces a constant expression' error inside system headers to compensate. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149729 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-02Split Sema::MarkDeclarationReferenced into multiple functions; the ↵Eli Friedman
additional entry points are needed to implement C++11 odr-use marking correctly. No functional change in this patch; I'll actually make the change which fixes the odr-use marking in a followup patch. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149586 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-01Reject mismatched "#pragma GCC visibility push" and "#pragma GCC visibility ↵Rafael Espindola
pop". git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149559 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-31Make the callback object to Sema::CorrectTypo mandatory.Kaelyn Uhrain
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149451 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-27Added source location for the template keyword in AST template-id expressions.Abramo Bagnara
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149127 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-27constexpr: Implement the [dcl.constexpr]p5 check for whether a constexprRichard Smith
function definition can produce a constant expression. This also provides the last few checks for [dcl.constexpr]p3 and [dcl.constexpr]p4. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149108 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-24Promote the extension warning for attempts to catch a reference orDouglas Gregor
pointer to incomplete type from an ExtWarn to an error. We put the ExtWarn in place as part of a workaround for Boost (PR6527), but it (1) doesn't actually match a GCC extension and (2) has been fixed for two years in Boost, and (3) causes us to emit code that fails badly at run time, so it's a bad idea to keep it. Fixes PR11803. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148838 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-24Support decltype in member initializers.David Blaikie
This is the last piece of N3031 (decltype in weird places) - supporting the use of decltype in a class ctor's member-initializer-list to specify the base classes to initialize. Reviewed by Richard Smith. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148789 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-23Minor fixups for auto deduction of initializer lists.Sebastian Redl
Fix some review comments. Add a test for deduction when std::initializer_list isn't available yet. Fix redundant error messages. This fixes and outstanding FIXME too. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148735 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-23Eli says this should check MicrosoftMode instead.Nico Weber
Also change a || that I accidentally changed to && back to ||. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148677 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-23In ms mode, a move assignment operator shouldn't mark a copy ctor as deleted.Nico Weber
MSVC2010's pair class has a move assignment operator but no explicit copy constructor, which makes it unusable without this change. For symmetry, let move copy constructors not mark the default assignment operator as deleted either. Both changes match cl.exe's behavior. Fixes pr11826. Also update the standard excerpt to point to the right paragraph. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148675 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-23Make sure the AST correctly represents lvalue-to-rvalue conversions where ↵Eli Friedman
appropriate. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148673 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-21Fix some comments relating to ExpressionEvaluationContexts. Get rid of a ↵Eli Friedman
couple of uses of ConstantEvaluated which don't make sense. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148624 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-20More dead code removal (using -Wunreachable-code)David Blaikie
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148577 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-17Add Sema::isInitListConstructor. This will be needed for upcoming work.Sebastian Redl
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148354 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-17Auto deduction support for std::initializer_list, including for-range ↵Sebastian Redl
support. This means you can now write: for (int i : {1, 4, 512, 23, 251}) {} git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148353 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-17Template argument deduction for std::initializer_list arguments from ↵Sebastian Redl
initializer lists. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148352 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-17Add Sema::isStdInitializerList, which will be necessary for the upcoming ↵Sebastian Redl
operations. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148348 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-16Add some calls to MarkDeclarationReferenced, towards a point where every ↵Eli Friedman
declaration which is used is marked as used. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148253 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-14De-virtualize getPreviousDecl() and getMostRecentDecl() when we knowDouglas Gregor
we have a redeclarable type, and only use the new virtual versions (getPreviousDeclImpl() and getMostRecentDeclImpl()) when we don't have that type information. This keeps us from penalizing users with strict type information (and is the moral equivalent of a "final" method). Plus, settle on the names getPreviousDecl() and getMostRecentDecl() throughout. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148187 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-13PR11754: Reject non-static constexpr member functions in classes with virtualRichard Smith
base classes. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148094 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-13constexpr is allowed on static member functions of non-literal classes. Per ↵Eli Friedman
report on cfe-dev. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148090 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-11Fix the caching in CorrectTypo so that other non-keyword identifiersKaelyn Uhrain
are still added if the cached correction fails validation. Also fix a copy-and-paste error in a comment from my previous commit. Finally, add an example of the benefit the typo correction callback adds to TryNamespaceTypoCorrection--which happens to also tickle the above caching problem, as the only way a non-namespace Decl would be added to the possible corrections is if it was cached as the correction for a previous instance of the same typo where the typo was corrected to a non-namespace via a different code path. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147968 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-11Add initial callback object support to Sema::CorrectTypo.Kaelyn Uhrain
Also includes two examples of the callback: a wrapper/replacement for the CorrectTypoContext enum, and a conversion of the two calls to CorrectTypo in SemaDeclCXX.cpp (one of which provides verifiable improvement to the typo correction, as demonstrated in the added test). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147962 91177308-0d34-0410-b5e6-96231b3b80d8
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