e1314a64b8
new InitializationSequence. This fixes some bugs (e.g., PR5808),
changed some diagnostics, and caused more churn than expected. What's
new:
- InitializationSequence now has a "C conversion sequence" category
and step kind, which falls back to
- Changed the diagnostics for returns to always have the result type
of the function first and the type of the expression second.
CheckSingleAssignmentConstraints to peform checking in C.
- Improved ASTs for initialization of return values. The ASTs now
capture all of the temporaries we need to create, but
intentionally do not bind the tempoary that is actually returned,
so that it won't get destroyed twice.
- Make sure to perform an (elidable!) copy of the class object that
is returned from a class.
- Fix copy elision in CodeGen to properly see through the
subexpressions that occur with elidable copies.
- Give "new" its own entity kind; as with return values and thrown
objects, we don't bind the expression so we don't call a
destructor for it.
Note that, with this patch, I've broken returning move-only types in
C++0x. We'll fix it later, when we tackle NRVO.
llvm-svn: 91669
44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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template<typename T, typename U = float> struct A { };
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typedef A<int> A_int;
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typedef float FLOAT;
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A<int, FLOAT> *foo(A<int> *ptr, A<int> const *ptr2, A<int, double> *ptr3) {
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if (ptr)
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return ptr; // okay
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else if (ptr2)
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return ptr2; // expected-error{{cannot initialize return object of type 'A<int, FLOAT> *' with an lvalue of type 'A<int> const *'}}
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else {
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return ptr3; // expected-error{{cannot initialize return object of type 'A<int, FLOAT> *' with an lvalue of type 'A<int, double> *'}}
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}
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}
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template<int I> struct B;
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const int value = 12;
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B<17 + 2> *bar(B<(19)> *ptr1, B< (::value + 7) > *ptr2, B<19 - 3> *ptr3) {
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if (ptr1)
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return ptr1;
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else if (ptr2)
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return ptr2;
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else
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return ptr3; // expected-error{{cannot initialize return object of type 'B<17 + 2> *' with an lvalue of type 'B<19 - 3>}}
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}
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typedef B<5> B5;
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namespace N {
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template<typename T> struct C {};
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}
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N::C<int> c1;
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typedef N::C<float> c2;
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// PR5655
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template<typename T> struct Foo { }; // expected-note{{template is declared here}}
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void f(void) { Foo bar; } // expected-error{{without a template argument list}}
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