[clang-doc][NFC] Avoid C-style casts (#136390)

Author: ilovepi

clang-tools-extra/clang-doc/BitcodeReader.cpp

@@ -46,7 +46,7 @@ llvm::Error decodeRecord(const Record &R, int &Field, llvm::StringRef Blob) {
   if (R[0] > INT_MAX)
     return llvm::createStringError(llvm::inconvertibleErrorCode(),
                                    "integer too large to parse");
-  Field = (int)R[0];
+  Field = static_cast<int>(R[0]);
   return llvm::Error::success();
 }
 
@@ -85,7 +85,7 @@ llvm::Error decodeRecord(const Record &R, std::optional<Location> &Field,
   if (R[0] > INT_MAX)
     return llvm::createStringError(llvm::inconvertibleErrorCode(),
                                    "integer too large to parse");
-  Field.emplace((int)R[0], Blob, (bool)R[1]);
+  Field.emplace(static_cast<int>(R[0]), Blob, static_cast<bool>(R[1]));
   return llvm::Error::success();
 }
 
@@ -135,7 +135,7 @@ llvm::Error decodeRecord(const Record &R,
   if (R[0] > INT_MAX)
     return llvm::createStringError(llvm::inconvertibleErrorCode(),
                                    "integer too large to parse");
-  Field.emplace_back((int)R[0], Blob, (bool)R[1]);
+  Field.emplace_back(static_cast<int>(R[0]), Blob, static_cast<bool>(R[1]));
   return llvm::Error::success();
 }