llvm-svn: 39304

struct q { int a, a; };

with:

t.c:3:19: error: duplicate member 'a'
struct q { int a, a; };
                  ^
t.c:3:16: error: previous definition is here
struct q { int a, a; };
               ^

llvm-svn: 39303

This emits these diagnostics:

t.c:4:14: error: redefinition of 'a'
enum foo22 { a, b };
             ^
t.c:3:5: error: previous definition is here
int a;
    ^
t.c:8:17: error: redefinition of enumerator 'b'
enum foo23 { c, b };
                ^
t.c:4:17: error: previous definition is here
enum foo22 { a, b };
                ^
4 diagnostics generated.


for:

int a;
enum foo22 { a, b };
enum foo23 { c, b };

llvm-svn: 39302

llvm-svn: 39301

the EnumDecl when the enum type is complete.  This allows us to detect
redefinitions of enums.

llvm-svn: 39300

t.c:2:6: warning: ISO C forbids forward references to 'enum' types
enum foo22* X;
     ^

llvm-svn: 39299

structs and enums.

llvm-svn: 39298

llvm-svn: 39297

t.c:10:15: warning: 'bonk' may not be nested in a struct due to flexible array member
  struct bink bonk;
              ^
t.c:13:14: error: 'struct bink' may not be used as an array element due to flexible array member
struct bink A[123];
             ^
for:

struct bink {
  struct bink *a;
  int X[];  // ok.
};

struct foo {
  int A;
  struct bink bonk;
};

struct bink A[123];

llvm-svn: 39296

struct bork {
  int X[];
};

struct bink {
  struct bink a;
  int X[];  // ok.
};

to:
t.c:3:7: error: flexible array 'X' not allowed in otherwise empty struct
  int X[];
      ^
t.c:7:15: error: field 'a' has incomplete type
  struct bink a;
              ^

llvm-svn: 39295

t.c:5:8: error: field 'foo' declared as a function
  void foo();
       ^

llvm-svn: 39294

llvm-svn: 39293

like:
struct S { struct S {} X; };

with:
t.c:2:19: error: nested redefinition of 'struct'
struct S { struct S {} X; };
                  ^
t.c:2:1: error: previous definition is here
struct S { struct S {} X; };
^

llvm-svn: 39292

llvm-svn: 39291

llvm-svn: 39290

C99 6.2.5.

llvm-svn: 39289

llvm-svn: 39288

llvm-svn: 39287

Diagnose redefintion of tag types, e.g.:

t.c:7:8: error: redefinition of 'blah'
struct blah {};
       ^
t.c:1:8: error: previous definition is here
struct blah {
       ^
2 diagnostics generated.

llvm-svn: 39286

llvm-svn: 39285

converting a declspec with TST = struct/union.  Pretty print as well.

llvm-svn: 39284

llvm-svn: 39283

Use it to hold the declaration object for a struct/union.

llvm-svn: 39282

llvm-svn: 39281

llvm-svn: 39280

llvm-svn: 39279

llvm-svn: 39278

rename it to ParseTag.

llvm-svn: 39277

llvm-svn: 39276

struct blah * P;
union blah *P2;

we now emit:

t.c:2:1: error: redefinition of 'blah' with tag that does not match previous use
union blah *P2;
^
t.c:1:8: error: previous use is here
struct blah * P;
       ^

llvm-svn: 39275

or a definition/declaration of a tag.  This is required to handle
C99 6.7.2.3p11 properly.

llvm-svn: 39274

queries more natural.

llvm-svn: 39273

case and handle identifiers in the same namespace correctly.  This implements
test/Parser/c-namespace.c

llvm-svn: 39272

llvm-svn: 39271

llvm-svn: 39270

llvm-svn: 39269

llvm-svn: 39268

 - Add support for getting the namespace of a decl.
 - Move type down the inheritance hierarchy, it doesn't make sense for a struct
   to have a type, and typedef's use types in different ways than variables do.
 - Add initial TagDecl/RecordDecl classes.

llvm-svn: 39267

Make name lookup properly obey C namespaces, simplify decl construction byeliminating the 'next' pointer from the ctor, and add initial support forparsing struct/union tags.

llvm-svn: 39266

eliminating the 'next' pointer from the ctor, and add initial support for
parsing struct/union tags.

llvm-svn: 39265