[LLVMbugs] [Bug 3663] New: clang rejects integer size expression that gcc accepts

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=3663

           Summary: clang rejects integer size expression that gcc accepts
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Semantic Analyzer
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: kremenek at apple.com
                CC: llvmbugs at cs.uiuc.edu


clang rejects the following top-level declaration that gcc accepts:

  static const unsigned array[((2 * (int)((((4) / 2) + 1.0/3.0) * (4) - 1e-8))
+ 1)];

the error:

$ clang t.c
t.c:1:23: error: variable length array declaration not allowed at file scope
static const unsigned array[((2 * (int)((((4) / 2) + 1.0/3.0) * (4) - 1e-8)) +
1)];
                      ^    
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 diagnostic generated.

This is related to <rdar://problem/6437859>.  The line above is the complete
test case.


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