[clang][Interp][NFC] Context::classify() can be const

Author: tbaederr

clang/lib/AST/Interp/Context.cpp

@@ -59,7 +59,7 @@ bool Context::evaluateAsInitializer(State &Parent, const VarDecl *VD,
 
 const LangOptions &Context::getLangOpts() const { return Ctx.getLangOpts(); }
 
-llvm::Optional<PrimType> Context::classify(QualType T) {
+llvm::Optional<PrimType> Context::classify(QualType T) const {
   if (T->isReferenceType() || T->isPointerType()) {
     return PT_Ptr;
   }

clang/lib/AST/Interp/Context.h

@@ -60,7 +60,7 @@ class Context {
   unsigned getCharBit() const;
 
   /// Classifies an expression.
-  llvm::Optional<PrimType> classify(QualType T);
+  llvm::Optional<PrimType> classify(QualType T) const;
 
 private:
   /// Runs a function.