http://llvm.org/bugs/show_bug.cgi?id=13716
Bug #: 13716
Summary: alignas is accepted on typedefs
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C++11
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Clang accepts the following ill-formed code:
typedef char alignas(int) A;
typedef char alignas(3) B;
This is invalid per 7.6.2[dcl.align]p1:
"An alignment-specifier may be applied to a variable or to a class data
member ... An alignment-specifier may also be applied to the declaration of a
class or enumeration type. ..."
GCC 4.7 correctly rejects these constructs (though without the most elegant
diagnostics):
alignas.cpp:1:27: error: expected initializer before ‘A1’
alignas.cpp:2:21: error: typedef ‘alignas’ is initialized (use decltype
instead)
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