[llvm-bugs] [Bug 28094] New: Unlike MSVC, __pragma(pack(pop)) cannot be placed before semicolon in struct declaration

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=28094

            Bug ID: 28094
           Summary: Unlike MSVC, __pragma(pack(pop)) cannot be placed
                    before semicolon in struct declaration
           Product: clang
           Version: 3.8
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: jibz-llvmbugs at stdip.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

MSVC (I only checked 2015) allows __pragma(pack(pop)) to be placed
both before and after the semicolon following a struct declaration.
It seems Clang only allows it after. Example:

__pragma(pack(push, 1)) struct foo { int a; } __pragma(pack(pop));

compiles with MSVC, but Clang gives:

foo.c(1,46) :  error: expected ';' after struct
__pragma(pack(push, 1)) struct foo { int a; } __pragma(pack(pop));
                                             ^
                                             ;
1 error generated.

There are some codebases that uses macros that expand to this
version.

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