- When instantiating a friend type template, perform semantic
analysis on the resulting type.
- Downgrade the errors concerning friend type declarations that do
not refer to classes to ExtWarns in C++98/03. C++0x allows
practically any type to be befriended, and ignores the friend
declaration if the type is not a class.
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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.
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- This is designed to make it obvious that %clang_cc1 is a "test variable"
which is substituted. It is '%clang_cc1' instead of '%clang -cc1' because it
can be useful to redefine what gets run as 'clang -cc1' (for example, to set
a default target).
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unknown type name, e.g.,
foo::bar x;
when "bar" does not refer to a type in "foo".
With this change, the parser now calls into the action to perform
diagnostics and can try to recover by substituting in an appropriate
type. For example, this allows us to easily diagnose some missing
"typename" specifiers, which we now do:
test/SemaCXX/unknown-type-name.cpp:29:1: error: missing 'typename'
prior to dependent type name 'A<T>::type'
A<T>::type A<T>::f() { return type(); }
^~~~~~~~~~
typename
Fixes PR3990.
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class templates. We now treat friend class templates much more like
normal class templates, except that they still get special name lookup
rules. Fixes PR5057 and eliminates a bunch of spurious diagnostics in
<iostream>.
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of any previous declaration in case we replace it in a class's declaration table.
Fixes bug 4858. This sort of thing makes me reconsider putting friend declarations in
declaration lists.
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decl list, and remove some workarounds that were due to this. Thanks to Eli for
pointing this out and providing the test case.
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declarations of same, introduce a single AST class and add appropriate bits
(encoded in the namespace) for whether a decl is "real" or not. Much hackery
about previously-declared / not-previously-declared, but it's essentially
mandated by the standard that friends alter lookup, and this is at least
fairly non-intrusive.
Refactor the Sema methods specific to friends for cleaner flow and less nesting.
Incidentally solve a few bugs, but I remain confident that we can put them back.
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accurately. Prevents the assert from triggering incorrectly when friending
functions first declared in extern "C" contexts. Fixes bug 4757.
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Permit a class to friend its class members in C++ 98, as long as extensions
are enabled (and even when they aren't, only give an extwarn about it).
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Douglas Gregor
John McCall
Daniel Dunbar