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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
2012-02-17Reject continue/break statements within members of local functions nested withinRichard Smith
loop and switch statements, by teaching Scope that a function scope never has a continue/break parent for the purposes of control flow. Remove the hack in block and lambda expressions which worked around this by pretending that such expressions were continue/break scopes. Remove Scope::ControlParent, since it's unused. In passing, teach default statements to recover properly from a missing ';', and add a fixit for same to both default and case labels (the latter already recovered correctly). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150776 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16Avoid infinite mutual recursion in DiagnoseInvalidRedeclaration.Kaelyn Uhrain
Don't try to typo-correct a method redeclaration to declarations not in the current record as it could lead to infinite recursion if CorrectTypo finds more than one correction candidate in a parent record. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150735 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16Lambda closure types are always considered to be like "local" classes,Douglas Gregor
even if they are not within a function scope. Teach template instantiation to treat them as such, and make sure that we have a local instantiation scope when instantiating default arguments and static data members. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150725 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16C++11 allows unions to have static data members. Remove the correspondingRichard Smith
restriction and add some tests. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150721 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16If code completion patterns are not enabled, use simpler else/else ifDouglas Gregor
completions that don't insert braces. Fixes <rdar://problem/10764168>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150707 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16Add fixits for ARC casting errors for implicit conversions as well. ↵Argyrios Kyrtzidis
rdar://10289283 Also fix the fixit (oh the irony) when it uses CFBridgingRetain/CFBridgingRelease; they are supposed to be calls with the casted expression as parameter, they should not be inserted into the cast like the __bridge keywords. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150705 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16Minor fix to template instantiation, which properly instantiatesDeLesley Hutchins
dependent attributes on static members of templatized classes. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150704 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16Thread safety analysis: Don't check for lockable on undefined types.DeLesley Hutchins
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150702 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16Proper checking of list-initializers for array new expressions.Sebastian Redl
This finishes generalized initializer support in Sema. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150688 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16Revert "Revert "Make CXXNewExpr contain only a single initialier, and not ↵Sebastian Redl
hold the used constructor itself."" This reintroduces commit r150682 with a fix for the Bullet benchmark crash. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150685 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16Revert "Make CXXNewExpr contain only a single initialier, and not hold the ↵Sebastian Redl
used constructor itself." It leads to a compiler crash in the Bullet benchmark. This reverts commit r12014. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150684 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16Make CXXNewExpr contain only a single initialier, and not hold the used ↵Sebastian Redl
constructor itself. Holding the constructor directly makes no sense when list-initialized arrays come into play. The constructor is now held in a CXXConstructExpr, if construction is what is done. The new design can also distinguish properly between list-initialization and direct-initialization, as well as implicit default-initialization constructors and explicit value-initialization constructors. Finally, doing it this way removes redundance from the AST because CXXNewExpr doesn't try to handle both the allocation and the initialization responsibilities. This breaks the static analysis of new expressions. I've filed PR12014 to track this. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150682 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-16Shift Microsoft enum extensions from -fms-extensions to -fms-compatibility, ↵Eli Friedman
so -fms-extensions doesn't affect enum semantics in incompatible ways. <rdar://problem/10657186>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150663 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
2012-02-15Silence a valgrind warning, and remove an unused var.Kaelyn Uhrain
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150629 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15Support GCC's bug^Wextension allowing class array members to be initalized by aRichard Smith
parenthesized braced-init-list in the base/member initialization list. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150625 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15Improve typo correction involving nested name specifiers.Kaelyn Uhrain
Snooping in other namespaces when the identifier being corrected is already qualified (i.e. a valid CXXScopeSpec is passed to CorrectTypo) and ranking synthesized namespace qualifiers relative to the existing qualifier is now performed. Support for disambiguating the string representation of synthesized namespace qualifers has also been added (the change to test/Parser/cxx-using-directive.cpp is an example of an ambiguous relative qualifier). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150622 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15Lambda closure types have a conversion function to a block pointerDouglas Gregor
with the same parameter types and return type as the function call operator. This is the real answer to http://stackoverflow.com/questions/4148242/is-it-possible-to-convert-a-c0x-lambda-to-a-clang-block :) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150620 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15Factor the construction of the lambda-to-function-pointer conversion ↵Douglas Gregor
function declaration into a separate function. No functionality change git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150617 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
2012-02-15Introduce a new initialization entity for lambda captures, andDouglas Gregor
specialize location information and diagnostics for this entity. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150588 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15Specialize noreturn diagnostics for lambda expressions.Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150586 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15Fix silly precedence error.Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150585 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15Specialize the diagnostic complaining about conflicting types ofDouglas Gregor
return statements within a lambda; this diagnostic previously referred to blocks. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150584 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15Implement code completion support for lambda capture lists.Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150583 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15Make -Wformat fix-its preserve original conversion specifiers.Hans Wennborg
This commit makes PrintfSpecifier::fixType() and ScanfSpecifier::fixType() only fix a conversion specification enough that Clang wouldn't warn about it, as opposed to always changing it to use the "canonical" conversion specifier. (PR11975) This preserves the user's choice of conversion specifier in cases like: printf("%a", (long double)1); where we previously suggested "%Lf", we now suggest "%La" printf("%x", (long)1); where we previously suggested "%ld", we now suggest "%lx". git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150578 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15If a static data member of a class template which could be used in a constantRichard Smith
expression is referenced, defined, then referenced again, make sure we instantiate it the second time it's referenced. This is the static data member analogue of r150518. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150560 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-15Split reinterpret_casts of member pointers out from CK_BitCast; thisJohn McCall
is general goodness because representations of member pointers are not always equivalent across member pointer types on all ABIs (even though this isn't really standard-endorsed). Take advantage of the new information to teach IR-generation how to do these reinterprets in constant initializers. Make sure this works when intermingled with hierarchy conversions (although this is not part of our motivating use case). Doing this in the constant-evaluator would probably have been better, but that would require a *lot* of extra structure in the representation of constant member pointers: you'd really have to track an arbitrary chain of hierarchy conversions and reinterpretations in order to get this right. Ultimately, this seems less complex. I also wasn't quite sure how to extend the constant evaluator to handle foldings that we don't actually want to treat as extended constant expressions. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150551 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
2012-02-14If a constexpr function template specialization is referenced, and then theRichard Smith
template is defined, and then the specialization is referenced again, don't forget to instantiate the template on the second reference. Use the source location of the first reference as the point of instantiation, though. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150518 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
2012-02-14Check the return type of lambda expressions.Douglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150503 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-14PR11650: Implement resolution of core issue 1301. Value initialization can't beRichard Smith
used to construct an object of union type with a deleted default constructor (plus fixes for some related value-initialization corner cases). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150502 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-14Warn about non-int main() results in GNU C mode instead of erroring.John McCall
Based on a patch by Vasiliy Korchagin! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150500 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-14Implement support for lambda capture pack expansions, e.g.,Douglas Gregor
[&values...] { print(values...); } git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150497 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-14Use several weighted factors to determine typo candidate viablity.Kaelyn Uhrain
Replace the simple Levenshtein edit distance for typo correction candidates--and the hacky way adding namespace qualifiers would affect the edit distance--with a synthetic "edit distance" comprised of several factors and their relative weights. This also allows the typo correction callback object to convey more information about the viability of a correction candidate than simply viable or not viable. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150495 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
2012-02-14Link together the call operator produced from transforming a lambdaDouglas Gregor
expression with the original call operator, so that we don't try to separately instantiate the call operator. Test and tweak a few more bits for template instantiation of lambda expressions. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150440 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-13Deal with a horrible C++11 special case. If a non-literal type has a constexprRichard Smith
constructor, and that constructor is used to initialize an object of static storage duration such that all members and bases are initialized by constant expressions, constant initialization is performed. In this case, the object can still have a non-trivial destructor, and if it does, we must emit a dynamic initializer which performs no initialization and instead simply registers that destructor. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150419 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-13Introduce support for template instantiation of lambdaDouglas Gregor
expressions. This is mostly a simple refact, splitting the main "start a lambda expression" function into smaller chunks that are driven either from the parser (Sema::ActOnLambdaExpr) or during AST transformation (TreeTransform::TransformLambdaExpr). A few minor interesting points: - Added new entry points for TreeTransform, so that we can explicitly establish the link between the lambda closure type in the template and the lambda closure type in the instantiation. - Added a bit into LambdaExpr specifying whether it had an explicit result type or not. We should have had this anyway. This code is 'lightly' tested. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150417 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-13Don't route explicit construction via list-initialization through the ↵Sebastian Redl
functional cast code path. It sometimes does the wrong thing, produces horrible error messages, and is just unnecessary. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150408 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-13Keep track of the set of array index variables we use when weDouglas Gregor
synthesize a by-copy captured array in a lambda. This information will be needed by IR generation. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150396 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-13Move the storage of lambda captures and capture initializers fromDouglas Gregor
LambdaExpr over to the CXXRecordDecl. This allows us to eliminate the back-link from the closure type to the LambdaExpr, which will simplify and lazify AST deserialization. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150393 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
2012-02-12Implement the standard decltype() semantics described in C++11Douglas Gregor
[dcl.type.simple]p4, which treats all xvalues as returning T&&. We had previously implemented a pre-standard variant of decltype() that doesn't cope with, e.g., static_ast<T&&>(e) very well. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150348 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-12Within the body of a lambda expression, decltype((x)) for anDouglas Gregor
id-expression 'x' will compute the type based on the assumption that 'x' will be captured, even if it isn't captured, per C++11 [expr.prim.lambda]p18. There are two related refactors that go into implementing this: 1) Split out the check that determines whether we should capture a particular variable reference, along with the computation of the type of the field, from the actual act of capturing the variable. 2) Always compute the result of decltype() within Sema, rather than AST, because the decltype() computation is now context-sensitive. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150347 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-12Proper initializer list support for new expressions and type construct ↵Sebastian Redl
expressions. Array new still missing. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150346 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
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