https://llvm.org/bugs/show_bug.cgi?id=28711
Richard Smith <richard-l...@metafoo.co.uk> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |richard-l...@metafoo.co.uk
Resolution|--- |INVALID
--- Comment #1 from Richard Smith <richard-l...@metafoo.co.uk> ---
The expression "a.size()", used as a non-type template argument, is not a
constant expression, as Clang reports.
See [expr.const] (5.20)/2.10:
"A conditional-expression e is [not a constant expression if evaluating it]
would evaluate [...]:
2.10) an id-expression that refers to a variable or data member of reference
type unless the reference has a preceding initialization and either
2.10.1) it is initialized with a constant expression or
2.10.2) its lifetime began within the evaluation of e"
The id-expression "a" refers to a variable of reference type that is not
initialized (it's a function parameter) and whose lifetime began outside the
evaluation of e ("a.size()"). We can't determine which object is denoted by
"a", so the expression is non-constant (even though "size()" would not have
looked at that object).
--
You are receiving this mail because:
You are on the CC list for the bug.
_______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
