[clang][Interp][NFC] Use a templated conversion operator

Author: tbaederr

clang/lib/AST/Interp/Boolean.h

@@ -45,15 +45,10 @@ class Boolean final {
   Boolean operator-(const Boolean &Other) const { return Boolean(V - Other.V); }
   Boolean operator~() const { return Boolean(true); }
 
-  explicit operator int8_t() const { return V; }
-  explicit operator uint8_t() const { return V; }
-  explicit operator int16_t() const { return V; }
-  explicit operator uint16_t() const { return V; }
-  explicit operator int32_t() const { return V; }
-  explicit operator uint32_t() const { return V; }
-  explicit operator int64_t() const { return V; }
-  explicit operator uint64_t() const { return V; }
-  explicit operator bool() const { return V; }
+  template <typename Ty, typename = std::enable_if_t<std::is_integral_v<Ty>>>
+  explicit operator Ty() const {
+    return V;
+  }
 
   APSInt toAPSInt() const {
     return APSInt(APInt(1, static_cast<uint64_t>(V), false), true);

clang/lib/AST/Interp/Integral.h

@@ -98,10 +98,10 @@ template <unsigned Bits, bool Signed> class Integral final {
     return Integral<DstBits, DstSign>(V);
   }
 
-  explicit operator unsigned() const { return V; }
-  explicit operator int64_t() const { return V; }
-  explicit operator uint64_t() const { return V; }
-  explicit operator int32_t() const { return V; }
+  template <typename Ty, typename = std::enable_if_t<std::is_integral_v<Ty>>>
+  explicit operator Ty() const {
+    return V;
+  }
 
   APSInt toAPSInt() const {
     return APSInt(APInt(Bits, static_cast<uint64_t>(V), Signed), !Signed);