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[Support] Consolidate has_FlowTraits in YAMLTraits.h (NFC) #159241

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Merged
merged 1 commit into from
Sep 17, 2025
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[Support] Consolidate has_FlowTraits in YAMLTraits.h (NFC) #159241

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11 changes: 2 additions & 9 deletions llvm/include/llvm/Support/YAMLTraits.h
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Original file line number Diff line number Diff line change
Expand Up @@ -442,15 +442,8 @@ template <class T> struct has_CustomMappingTraits {
is_detected<check, CustomMappingTraits<T>>::value;
};

// has_FlowTraits<int> will cause an error with some compilers because
// it subclasses int. Using this wrapper only instantiates the
// real has_FlowTraits only if the template type is a class.
template <typename T, bool Enabled = std::is_class_v<T>> class has_FlowTraits {
public:
static constexpr bool value = false;
};

template <class T> struct has_FlowTraits<T, true> {
// Test if flow is defined on type T.
template <typename T> struct has_FlowTraits {
template <class U> using check = decltype(&U::flow);

static constexpr bool value = is_detected<check, T>::value;
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