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7bf8f6fa8a
packs. Two changes: * Track odr-use via FunctionParmPackExprs to properly handle dependent odr-uses of packs in generic lambdas. * Do not instantiate implicit captures; instead, regenerate them by instantiating the body of the lambda. This is necessary to distinguish between cases where only one element of a pack is captured and cases where the entire pack is captured. This reinstates r362358 (reverted in r362375) with a fix for an uninitialized variable use in UpdateMarkingForLValueToRValue. llvm-svn: 362531
18 lines
555 B
C++
18 lines
555 B
C++
// RUN: %clang_cc1 -std=c++2a -verify %s
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// expected-no-diagnostics
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template<typename ...T, typename ...Lambda> void check_sizes(Lambda ...L) {
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static_assert(((sizeof(T) == sizeof(Lambda)) && ...));
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}
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template<typename ...T> void f(T ...v) {
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// Pack expansion of lambdas: each lambda captures only one pack element.
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check_sizes<T...>([=] { (void)&v; } ...);
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// Pack expansion inside lambda: captures all pack elements.
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auto l = [=] { ((void)&v, ...); };
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static_assert(sizeof(l) >= (sizeof(T) + ...));
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}
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template void f(int, char, double);
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