[cfe-commits] r63242 - in /cfe/trunk: Driver/RewriteObjC.cpp include/clang/AST/Decl.h include/clang/AST/Expr.h include/clang/AST/ExprCXX.h include/clang/Basic/DiagnosticSemaKinds.def lib/AST/Expr.cpp lib/AST/StmtPrinter.cpp lib/CodeGen/CGExprAgg.cpp lib/CodeGen/CGExprConstant.cpp lib/CodeGen/CGExprScalar.cpp lib/Sema/Sema.h lib/Sema/SemaDecl.cpp lib/Sema/SemaExpr.cpp lib/Sema/SemaInit.cpp test/Sema/array-init.c test/Sema/designated-initializers.c test/Sema/vector-init.c

[Chris Lattner]

On Jan 28, 2009, at 1:54 PM, Douglas Gregor wrote:

> Author: dgregor
> Date: Wed Jan 28 15:54:33 2009
> New Revision: 63242
>
> URL: http://llvm.org/viewvc/llvm-project?rev=63242&view=rev
> Log:
> Code generation support for C99 designated initializers.
>
> The approach I've taken in this patch is relatively straightforward,
> although the code itself is non-trivial. Essentially, as we process
> an initializer list we build up a fully-explicit representation of the
> initializer list, where each of the subobject initializations occurs
> in order. Designators serve to "fill in" subobject initializations in
> a non-linear way. The fully-explicit representation makes initializer
> lists (both with and without designators) easy to grok for codegen and
> later semantic analyses. We keep the syntactic form of the initializer
> list linked into the AST for those clients interested in exactly what
> the user wrote.
>
> Known limitations:
>  - Designating a member of a union that isn't the first member may
>    result in bogus initialization (we warn about this)
>  - GNU array-range designators are not supported (we warn about this)

Very nice Doug, please make these errors though.  Some code bases  
build with many warnings, so this can be easy to miss.  Thanks for  
working on this!

-Chris