Fix #12758: Add markup laguages

lib/cppcheck.cpp

@@ -643,7 +643,7 @@ unsigned int CppCheck::checkFile(const std::string& filename, const std::string
             if (mUnusedFunctionsCheck && mSettings.useSingleJob() && mSettings.buildDir.empty()) {
                 // this is not a real source file - we just want to tokenize it. treat it as C anyways as the language needs to be determined.
                 Tokenizer tokenizer(mSettings, *this);
-                tokenizer.list.setLang(Standards::Language::C);
+                tokenizer.list.setLang(Standards::Language::Markup);
                 if (fileStream) {
                     tokenizer.list.createTokens(*fileStream, filename);
                 }

lib/standards.h

@@ -34,7 +34,7 @@
  * This struct contains all possible standards that cppcheck recognize.
  */
 struct Standards {
-    enum Language { None, C, CPP };
+    enum Language { None, C, CPP, Markup };
 
     /** C code standard */
     enum cstd_t { C89, C99, C11, C17, C23, CLatest = C23 } c = CLatest;

lib/tokenlist.cpp

@@ -2190,10 +2190,18 @@ bool TokenList::isCPP() const
     return mLang == Standards::Language::CPP;
 }
 
+bool TokenList::isMarkup() const
+{
+    return mLang == Standards::Language::Markup;
+}
+
 void TokenList::setLang(Standards::Language lang)
 {
     ASSERT_LANG(lang != Standards::Language::None);
-    ASSERT_LANG(mLang == Standards::Language::None);
+    //ASSERT_LANG(mLang == Standards::Language::None);
+    /* OL: We should have an ability to change between languages when we have markup inside c++ project
+     *  which we treat as C
+     */
 
     mLang = lang;
 }

lib/tokenlist.h

@@ -68,6 +68,9 @@ class CPPCHECKLIB TokenList {
     /** @return true if the code is C++ */
     bool isCPP() const;
 
+    /** @return true if the code is a Markup language */
+    bool isMarkup() const;
+
     void setLang(Standards::Language lang);
 
     /**