Patch by @xsga!

Differential Revision: https://reviews.llvm.org/D39633

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This will be useful for certain refactoring actions.

rdar://34202062


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if possible when creating "Declaration" nodes in XML comments

rdar://14765746


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an identifier table lookup, *and* copy the LangOptions (including various
std::vector<std::string>s). Twice. We call this function once each time we start
parsing a declaration specifier sequence, and once for each call to Sema::Diag.

This reduces the compile time for a sample .c file from the linux kernel by 20%.


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clang -cc1 -ast-print put the struct
definition in the wrong place, like this:

  struct {} typedef S;

The reason that this happens is that the printing code
first prints the struct definition, and then tells the next
declaration to leave out the type. This behavior
is correct for simple variable declarations, but fails for
typedefs (or extern, mutable, etc).

The patch address this problem by skipping the struct
declaration when we first see it, and then telling the first
subsequent declaration that it needs to print out the full
struct definition.

Differential Revision: http://reviews.llvm.org/D17285


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Enable it for USRs and names when indexing.
Forward references can have different template argument names; including them
makes USRs and names unstable, since the name depends on whether we saw a forward reference or not.

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This is what debuggers expect.  Words towards fixing PR21528.

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Thanks to Kim Gräsman <kim.grasman@gmail.com> for pointing this out.


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No functional change.


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Modifications made by clang-tidy with minor tweaks.

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For namespaces, this is consistent with mangling and GCC's debug info
behavior. For structs, GCC uses <anonymous struct> but we prefer
consistency between all anonymous entities but don't want to confuse
them with template arguments, etc, so we'll just go with parens in all
cases.

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Since "half" is an OpenCL keyword and clang accepts __fp16 as an extension for
other languages, error messages and metadata (and hence debug info) should refer
to the half-precision floating point as "__fp16" instead of "half" when
compiling for non-OpenCL languages. This patch creates a new printing policy for
half in a similar manner to what is done for bool and wchar_t.

Differential Revision: http://llvm-reviews.chandlerc.com/D2952



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The change isn't completely comprehensive.  This can be filled in
lazily as needed.  There is one consumer right now.

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suppression of strong lifetime qualifiers when
inferring property. // rdar://15082812


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MSVC provides __wchar_t. This is the same as the built-in wchar_t type
from C++, but it is also available with -fno-wchar and in C.

The commit changes ASTContext to have two different types for this:

  - WCharTy is the built-in type used for wchar_t in C++ and __wchar_t.

  - WideCharTy is the type of a wide character literal. In C++ this is
    the same as WCharTy, and in C  it is an integer type compatible with
    the type in <stddef.h>.

This fixes PR15815.

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MSVC provides __wchar_t, either as an alias for the built-in wchar_t
type, or as a separate type depending on language (C vs C++) and flags
(-fno-wchar).

In -fms-extensions, Clang will simply accept __wchar_t as an alias for
whatever type is used for wide character literals. In -fms-compatibility, we
try to mimic MSVC's behavior by always making __wchar_t a builtin type.

This fixes PR15815.

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http://llvm-reviews.chandlerc.com/D52

Patch by Philip Craig!



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fix any bad objectiveC syntax coming out of
DeclPrinter. This is on going. Also, introduce a new
PrintPolicy and use it as needed when declaration tag
is to be produced via DeclPrinter.


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This is a simpler sort, entirely automatic with the help of
llvm/utils/sort_includes.py -- no manual edits here.

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Pull the Attr iteration parts out of Attr.h, so including DeclBase.h doesn't pull in all the generated Attr code.

Required to pull some functions out of line, but this shouldn't have a perf impact.
No functionality change.

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XML comment for declarations which pretty-prints
declaration. I had to XFAIL one test annotate-comments.cpp.
This test is currently unmaintainable as written.
Dmitri G., can you see what we can do about this test.
We should change this test such that adding a new tag does not wreck
havoc to the test.


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to reflect the intention, not the implementation.


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Add a flag PrintingPolicy::DontRecurseInDeclContext to provide "terse" output
from DeclPrinter.  The motivation is to use DeclPrinter to print declarations
in user-friendly format, without overwhelming user with inner detail of the
declaration being printed.

Also add many tests for DeclPrinter.  There are quite a few things that we
print incorrectly: search for WRONG in DeclPrinterTest.cpp -- and these tests
check our output against incorrect output, so that we can fix/refactor/rewrite
the DeclPrinter later.


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and remove ASTContext reference (which was frequently bound to a dereferenced
null pointer) from the recursive lump of printPretty functions. In so doing,
fix (at least) one case where we intended to use the 'dump' mode, but that
failed because a null ASTContext reference had been passed in.


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to types. Enable this flag for code completion, where knowing whether
something is in an anonymous or inline namespace is actually not
useful, since you don't have to type it anyway. Fixes
<rdar://problem/10208818>.


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macro whose only replacement token is '_Bool'.


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'bool' rather than '_Bool' within types, to make things a bit more
readable. Fixes <rdar://problem/10063263>.


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patch by Jon Mulder!


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header. This showed up in client code that has a different include
ordering after Chris's shuffle of raw_ostream. All of the Clang code
ends up with a header included before this one that provides the needed
type and using declaration.

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Language-design credit goes to a lot of people, but I particularly want
to single out Blaine Garst and Patrick Beard for their contributions.

Compiler implementation credit goes to Argyrios, Doug, Fariborz, and myself,
in no particular order.



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of file locations for anonymous tag types (e.g., "enum <anonymous at
t.h:15:6>"), which can get rather long.


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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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