Use static_assert

Signed-off-by: yronglin <[email protected]>

Author: yronglin

clang/include/clang/Lex/Preprocessor.h

@@ -2304,8 +2304,9 @@ class Preprocessor {
 
   /// Check whether the next pp-token is one of the specificed token kind. this
   /// method should have no observable side-effect on the lexed tokens.
-  template <typename... Ts>
-  bool isNextPPTokenOneOf(tok::TokenKind K, Ts... Ks) {
+  template <typename... Ts> bool isNextPPTokenOneOf(Ts... Ks) {
+    static_assert(sizeof...(Ts) > 0,
+                  "requires at least one tok::TokenKind specified");
     // Do some quick tests for rejection cases.
     std::optional<Token> Val;
     if (CurLexer)
@@ -2336,7 +2337,7 @@ class Preprocessor {
 
     // Okay, we found the token and return.  Otherwise we found the end of the
     // translation unit.
-    return Val->isOneOf(K, Ks...);
+    return Val->isOneOf(Ks...);
   }
 
 private:

clang/include/clang/Lex/Token.h

@@ -101,8 +101,10 @@ class Token {
   /// "if (Tok.is(tok::l_brace)) {...}".
   bool is(tok::TokenKind K) const { return Kind == K; }
   bool isNot(tok::TokenKind K) const { return Kind != K; }
-  template <typename... Ts> bool isOneOf(tok::TokenKind K1, Ts... Ks) const {
-    return is(K1) || (is(Ks) || ...);
+  template <typename... Ts> bool isOneOf(Ts... Ks) const {
+    static_assert(sizeof...(Ts) > 0,
+                  "requires at least one tok::TokenKind specified");
+    return (is(Ks) || ...);
   }
 
   /// Return true if this is a raw identifier (when lexing