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2013-04-22C++1y constexpr extensions, round 1: Allow most forms of declaration andRichard Smith
statement in constexpr functions. Everything which doesn't require variable mutation is also allowed as an extension in C++11. 'void' becomes a literal type to support constexpr functions which return 'void'. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180022 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-21The 'constexpr implies const' rule for non-static member functions is gone inRichard Smith
C++1y, so stop adding the 'const' there. Provide a compatibility warning for code relying on this in C++11, with a fix-it hint. Update our lazily-written tests to add the const, except for those ones which were testing our implementation of this rule. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179969 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-09Skip transparent contexts when looking for using directives in name lookup.Douglas Gregor
Fixes the bootstrap regression I introduced in r179067. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179079 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-08<rdar://problem/13540899> Collect using directives from all of the semantic ↵Douglas Gregor
contexts not represented by scopes. This fixes a regression I introduced in r178136, where we would not consider the using directives from the semantic declaration contexts that aren't represented by the lexical scopes (Scope) when performing unqualified name lookup. This lead to horribly funny diagnostics like "no identifier named 'foo'; did you mean 'foo'?". git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179067 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-01Only merge down a variable type if the previous declaration wasJohn McCall
visible. There's a lot of potential badness in how we're modelling these things, but getting this much correct is reasonably easy. rdar://13535367 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178488 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-27<rdar://problem/13317030> Consider using directives when performing ↵Douglas Gregor
unqualified name lookup into declarations contexts represented by the qualified-id but not in the actual scope hierarchy. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178136 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-26Remove FIXMEs: these are covered by a core issue which we don't yet implementRichard Smith
(but we happen to get this part right). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177958 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-26Implement special-case name lookup for inheriting constructors: memberRichard Smith
using-declarations with names which look constructor-like are interpreted as constructor names. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177957 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-05Add quotation marks to template names in diagnostics.David Blaikie
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176474 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-29PR15100: look through type sugar when determining whether we have one of theRichard Smith
forms of 'main' which we accept as an extension. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173758 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-29Fold tests for C++ 'main' into a single file.Richard Smith
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173756 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-08Properly compute triviality for explicitly-defaulted or deleted special members.Richard Smith
Remove pre-standard restriction on explicitly-defaulted copy constructors with 'incorrect' parameter types, and instead just make those special members non-trivial as the standard requires. This required making CXXRecordDecl correctly handle classes which have both a trivial and a non-trivial special member of the same kind. This also fixes PR13217 by reimplementing DiagnoseNontrivial in terms of the new triviality computation technology. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169667 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-12Fix more try scoping bugs introduced by r167650.David Blaikie
Introduces more clear scoping flags & flag combinations which should hopefully be more understandable. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167766 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-10Handle redeclarations of catch variables in catch blocks.David Blaikie
Fix to regression caused by r167650, caught by Richard Smith in code review. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167653 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-10PR14296: function parameter name collisions in function try/catchDavid Blaikie
C++11 3.3.3/2 "A parameter name shall not be redeclared in the outermost block of the function definition nor in the outermost block of any handler associated with a function-try-block." It's not totally clear to me whether the "FIXME" case is covered by this, but Richard Smith thinks it probably should be. It's just a bit more involved to fix that case. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167650 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-19Prior to adding the new "expected-no-diagnostics" directive to ↵Andy Gibbs
VerifyDiagnosticConsumer, make the necessary adjustment to 580 test-cases which will henceforth require this new directive. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166280 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-24Instantiate class template specializations during ADL.John McCall
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162586 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-01We don't need a lengthy quote from the wrong standard.Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155942 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-01Add test cases for r155935.Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155940 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-25If a type is non-literal by virtue of being incomplete produce notesRichard Smith
explaining that. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155598 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-10When determining whether an identifier followed by a '<' in a memberDouglas Gregor
access expression is the start of a template-id, ignore function templates found in the context of the entire postfix-expression. Fixes PR11856. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152520 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-20Make RequireLiteralType work correctly with incomplete array types. PR12037.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@151005 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
2012-02-09CWG issue 1405: mutable members are allowed in literal types, but can't undergoRichard Smith
lvalue-to-rvalue conversions in constant expressions. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150145 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-04Disallow constexpr main.Richard Smith
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149770 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-18constexpr: converted constant expression handling for enumerator values, caseRichard Smith
values and non-type template arguments of integral and enumeration types. This change causes some legal C++98 code to no longer compile in C++11 mode, by enforcing the C++11 rule that narrowing integral conversions are not permitted in the final implicit conversion sequence for the above cases. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148439 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-12Improve 0-argument -Wvexing-parse diagnostic by adding notes with fix-its:Richard Smith
- If the declarator is at the start of a line, and the previous line contained another declarator and ended with a comma, then that comma was probably a typo for a semicolon: int n = 0, m = 1, l = 2, // k = 5; myImportantFunctionCall(); // oops! - If removing the parentheses would correctly initialize the object, then produce a note suggesting that fix. - Otherwise, if there is a simple initializer we can suggest which performs value-initialization, then provide a note suggesting a correction to that initializer. Sema::Declarator now tracks the location of the comma prior to the declarator in the declaration, if there is one, to facilitate providing the note. The code to determine an appropriate initializer from the -Wuninitialized warning has been factored out to allow use in both that and -Wvexing-parse. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148072 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-06David Blaikie and Chandler would like us to diagnoseRichard Smith
int f(); in function scopes under -Wvexing-parse, so now we do. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147649 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-06Tweak to r147599 for PR10828: Move the check from the parser into sema, and useRichard Smith
the Semantic Powers to only warn on class types (or dependent types), where the constructor or destructor could do something interesting. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147642 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-05PR10828: Produce a warning when a no-arguments function is declared in blockRichard Smith
scope, when no other indication is provided that the user intended to declare a function rather than a variable. Remove some false positives from the existing 'parentheses disambiguated as a function' warning by suppressing it when the declaration is marked as 'typedef' or 'extern'. Add a new warning group -Wvexing-parse containing both of these warnings. The new warning is enabled by default; despite a number of false positives (and one bug) in clang's test-suite, I have only found genuine bugs with it when running it over a significant quantity of real C++ code. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147599 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-19constexpr handling improvements. Produce detailed diagnostics when a 'constexpr'Richard Smith
variable is initialized by a non-constant expression, and pass in the variable being declared so that earlier-initialized fields' values can be used. Rearrange VarDecl init evaluation to make this possible, and in so doing fix a long-standing issue in our C++ constant expression handling, where we would mishandle cases like: extern const int a; const int n = a; const int a = 5; int arr[n]; Here, n is not initialized by a constant expression, so can't be used in an ICE, even though the initialization expression would be an ICE if it appeared later in the TU. This requires computing whether the initializer is an ICE eagerly, and saving that information in PCH files. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146856 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-15Modify how the -verify flag works. Currently, the verification string andRichard Trieu
diagnostic message are compared. If either is a substring of the other, then no error is given. This gives rise to an unexpected case: // expect-error{{candidate function has different number of parameters}} will match the following error messages from Clang: candidate function has different number of parameters (expected 1 but has 2) candidate function has different number of parameters It will also match these other error messages: candidate function function has different number of parameters number of parameters This patch will change so that the verification string must be a substring of the diagnostic message before accepting. Also, all the failing tests from this change have been corrected. Some stats from this cleanup: 87 - removed extra spaces around verification strings 70 - wording updates to diagnostics 40 - extra leading or trailing characters (typos, unmatched parens or quotes) 35 - diagnostic level was included (error:, warning:, or note:) 18 - flag name put in the warning (-Wprotocol) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146619 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-07When we notice that a member function is defined with "= delete" or "=Douglas Gregor
default", make a note of which is used when creating the initial declaration. Previously, we would wait until later to handle default/delete as a definition, but this is too late: when adding the declaration, we already treated the declaration as "user-provided" when in fact it was merely "user-declared". Fixes PR10861 and PR10442, along with a bunch of FIXMEs. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@144011 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-13Update all tests other than Driver/std.cpp to use -std=c++11 rather thanRichard Smith
-std=c++0x. Patch by Ahmed Charles! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141900 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-12constexpr: don't consider class types with mutable members to be literal types.Richard Smith
The standard doesn't allow this, but mutable constexpr variables break the semantics so badly that we can't reasonably accept them. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141768 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-01constexpr: semantic checking for constexpr functions and constructors. Based inRichard Smith
part on patches by Peter Collingbourne. We diverge from the C++11 standard in a few areas, mostly related to checking constexpr function declarations, and not just definitions. See WG21 paper N3308=11-0078 for details. Function invocation substitution is not available in this patch; constexpr functions cannot yet be used from within constant expressions. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140926 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-12De-Unicode-ify.NAKAMURA Takumi
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@137430 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-10When performing the lookup in the current scope for a member access toDouglas Gregor
a member template, e.g., x.f<int> if we have found a template in the type of x, but the lookup in the current scope is ambiguous, just ignore the lookup in the current scope. Fixes <rdar://problem/9915664>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@137255 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-28Update this test to reflect the new (deterministic) order in r134038.Chandler Carruth
This was part of Kaelyn's original patch that got dropped while I was working on it, but after I ran my tests. =/ Sorry. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134039 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-28Modify test case to allow buildbots to make forward progress. This test shouldChad Rosier
now (incorrectly) pass. Once the appropriate fixes have been made this test should be reverted. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134035 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-28Add support for C++ namespace-aware typo correction, e.g., correctingDouglas Gregor
vector<int> to std::vector<int> Patch by Kaelyn Uhrain, with minor tweaks + PCH support from me. Fixes PR5776/<rdar://problem/8652971>. Thanks Kaelyn! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134007 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-21Teach Sema::ActOnUninitializedDecl() not to try to interpret when oneDouglas Gregor
should use a constructor to default-initialize a variable. InitializationSequence knows the rules for default initialization, better. Fixes <rdar://problem/8501008>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@131796 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-15Support for C++11 (non-template) alias declarations.Richard Smith
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129567 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-14Add support for C++0x's range-based for loops, as specified by the C++11 ↵Richard Smith
draft standard (N3291). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129541 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-04When emitting a "too many arguments to function call..." error, also include ↵Ted Kremenek
a note with a location for the function prototype. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@128833 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-02Semantic checking for exception specifications should be triggered byJohn McCall
whether C++ exceptions are enabled, not exceptions in general. PR9358. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126820 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-23C++ [basic.scope.hiding] allows an ordinary name to hide a non-tagDouglas Gregor
name *in the same scope*, but not across scopes. Implement the highlighted condition. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@117212 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-21Always treat 'main' as an extern "C" function, so that we detectDouglas Gregor
redeclarations of main appropriately rather than allowing it to be overloaded. Also, disallowing declaring main as a template. Fixes GCC DejaGNU g++.old-deja/g++.other/main1.C. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@117029 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-05"const std::vector<int>*" not "std::vector<int> const*"Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@113094 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-07Rip out the C++0x-specific handling of destructor names. The specification ↵Sebastian Redl
is still in flux and unclear, and our interim workaround was broken. Fixes PR7467. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@107835 91177308-0d34-0410-b5e6-96231b3b80d8
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