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[Support] Simplify has_StreamOperator (NFC) #159242

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Merged
merged 1 commit into from
Sep 17, 2025
Merged

[Support] Simplify has_StreamOperator (NFC) #159242

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13 changes: 6 additions & 7 deletions llvm/include/llvm/Support/FormatVariadicDetails.h
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Original file line number Diff line number Diff line change
Expand Up @@ -78,15 +78,14 @@ template <class T> class has_StreamOperator {
using ConstRefT = const std::decay_t<T> &;

template <typename U>
static char test(std::enable_if_t<
std::is_same_v<decltype(std::declval<llvm::raw_ostream &>()
<< std::declval<U>()),
llvm::raw_ostream &>,
int *>);
static auto test(int)
-> std::is_same<decltype(std::declval<llvm::raw_ostream &>()
<< std::declval<U>()),
llvm::raw_ostream &>;

template <typename U> static double test(...);
template <typename U> static auto test(...) -> std::false_type;

static bool const value = (sizeof(test<ConstRefT>(nullptr)) == 1);
static constexpr bool value = decltype(test<ConstRefT>(0))::value;
};

// Simple template that decides whether a type T should use the member-function
Expand Down