- 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.
llvm-svn: 148072
the Semantic Powers to only warn on class types (or dependent types), where the
constructor or destructor could do something interesting.
llvm-svn: 147642
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.
llvm-svn: 147599
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.
llvm-svn: 146856
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)
llvm-svn: 146619
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.
llvm-svn: 144011
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.
llvm-svn: 140926
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>.
llvm-svn: 137255
vector<int>
to
std::vector<int>
Patch by Kaelyn Uhrain, with minor tweaks + PCH support from me. Fixes
PR5776/<rdar://problem/8652971>.
Thanks Kaelyn!
llvm-svn: 134007
should use a constructor to default-initialize a
variable. InitializationSequence knows the rules for default
initialization, better. Fixes <rdar://problem/8501008>.
llvm-svn: 131796
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.
llvm-svn: 117029
a member template, and you try to call the member template with an explicit
template argument. See PR7247
For example, this downgrades the error to a warning in:
template<typename T> struct set{};
struct Value {
template<typename T>
void set(T value) {
}
};
void foo() {
Value v;
v.set<double>(3.2); // Warning here.
}
llvm-svn: 105518
the x86-64 __va_list_tag with this attribute. The attribute causes the
affected type to behave like a fundamental type when considered by ADL.
(x86-64 is the only target we currently provide with a struct-based
__builtin_va_list)
Fixes PR6762.
llvm-svn: 104941
way that C does. Among other differences, elaborated type specifiers
are defined to skip "non-types", which, as you might imagine, does not
include typedefs. Rework our use of IDNS masks to capture the semantics
of different kinds of declarations better, and remove most current lookup
filters. Removing the last remaining filter is more complicated and will
happen in a separate patch.
Fixes PR 6885 as well some spectrum of unfiled bugs.
llvm-svn: 102164
method parameter, provide a note pointing at the parameter itself so
the user does not have to manually look for the function/method being
called and match up parameters to arguments. For example, we now get:
t.c:4:5: warning: incompatible pointer types passing 'long *' to
parameter of
type 'int *' [-pedantic]
f(long_ptr);
^~~~~~~~
t.c:1:13: note: passing argument to parameter 'x' here
void f(int *x);
^
llvm-svn: 102038
parameter, explicitly ask the user to give it arguments. We used to
complain that it wasn't a type and expect the user to figure it out.
llvm-svn: 100729
that was present in a prior declaration, emit a warning rather than a
hard error (which we did before, and still do with mismatched
exception specifications). Moreover, provide a fix-it hint with the
throw() clause that should be added, e.g.,
t.C:10:7: warning: 'operator new' is missing exception specification
'throw(std::bad_alloc)'
void *operator new(unsigned long sz)
^
throw(std::bad_alloc)
As part of this, disable the warning when we're missing an exception
specification on operator new, operator new[], operator delete, or
operator delete[] when exceptions are turned off (-fno-exceptions).
Fixes PR5957.
llvm-svn: 99388
therefore not creating ElaboratedTypes, which are still pretty-printed
with the written tag).
Most of these testcase changes were done by script, so don't feel too
sorry for my fingers.
llvm-svn: 98149
C++98/03 and C++0x, since the '0x semantics break valid C++98/03
code. This new mess is tracked by core issue 399, which is still
unresolved.
Fixes PR6358 and PR6359.
llvm-svn: 96836
that name constructors, the endless joys of out-of-line constructor
definitions, and various other corner cases that the previous hack
never imagined. Fixes PR5688 and tightens up semantic analysis for
constructor names.
Additionally, fixed a problem where we wouldn't properly enter the
declarator scope of a parenthesized declarator. We were entering the
scope, then leaving it when we saw the ")"; now, we re-enter the
declarator scope before parsing the parameter list.
Note that we are forced to perform some tentative parsing within a
class (call it C) to tell the difference between
C(int); // constructor
and
C (f)(int); // member function
which is rather unfortunate. And, although it isn't necessary for
correctness, we use the same tentative-parsing mechanism for
out-of-line constructors to improve diagnostics in icky cases like:
C::C C::f(int); // error: C::C refers to the constructor name, but
// we complain nicely and recover by treating it as
// a type.
llvm-svn: 93322
Darwin's sekrit fourth argument. This should probably be factored to
let targets make target-specific decisions about what main() should look like.
Fixes rdar://problem/7414990
or if different platforms have radically different ideas of what they want in
llvm-svn: 92128
Because of the rules of base-class lookup* and the restrictions on typedefs, it
was actually impossible for this to cause any problems more serious than the
spurious acceptance of
template <class T> class A : B<A> { ... };
instead of
template <class T> class A : B<A<T> > { ... };
but I'm sure we can all agree that that is a very important restriction which
is well worth making another Parser->Sema call for.
(*) n.b. clang++ does not implement these rules correctly; we are not ignoring
non-type names
llvm-svn: 91792
Clang reasonably adds all the base specifiers in one pass; this is now required
for correctness to prevent lookup from going mad. But this has the advantage of
establishing the correct context when looking up base specifiers, which will be
important for access control.
llvm-svn: 91791
Richard Smith