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[llvm][NFC] Simplify implementation of isa #161403

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Sep 30, 2025
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[llvm][NFC] Simplify implementation of isa #161403

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9 changes: 2 additions & 7 deletions llvm/include/llvm/Support/Casting.h
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Original file line number Diff line number Diff line change
Expand Up @@ -544,14 +544,9 @@ struct CastInfo<To, std::optional<From>> : public OptionalValueCast<To, From> {
///
/// if (isa<Type>(myVal)) { ... }
/// if (isa<Type0, Type1, Type2>(myVal)) { ... }
template <typename To, typename From>
[[nodiscard]] inline bool isa(const From &Val) {
return CastInfo<To, const From>::isPossible(Val);
}

template <typename First, typename Second, typename... Rest, typename From>
template <typename... To, typename From>
[[nodiscard]] inline bool isa(const From &Val) {
return isa<First>(Val) || isa<Second, Rest...>(Val);
return (CastInfo<To, const From>::isPossible(Val) || ...);
}

/// cast<X> - Return the argument parameter cast to the specified type. This
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