https://bugs.llvm.org/show_bug.cgi?id=41701
Bug ID: 41701
Summary: Structured bindings on struct failing with clang-cl
Product: clang
Version: 7.0
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: jva...@gmail.com
CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org,
neeil...@live.com, richard-l...@metafoo.co.uk
This issue seems to be specific to building with clang-cl (or link with MSVC
STL).
I've tested it on version 7.0.0 with MSVC2017.
I'm using the example of
https://en.cppreference.com/w/cpp/language/structured_binding, which works with
MSVC and Clang on linux. (See https://gcc.godbolt.org/z/EW5TN-), however, fails
with clang-cl.
t.cpp
-----
struct S {
int x1 : 2;
volatile double y1;
};
S f();
const auto [x, y] = f(); // x is a const int lvalue identifying the 2-bit bit
field
// y is a const volatile double lvalue
run.bat
-------
clang-cl.exe /O2 /std:c++17 t.cpp
error:
------
t.cpp(7,11): error: cannot decompose this type; 'std::tuple_size<const
S>::value' is not a valid integral constant expression
const auto[x, y] = f(); // x is a const int lvalue identifying the 2-bit bit
field
^
1 error generated.
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