enabled and fixed modernize-use-default-member-init clang-tidy warnings

.clang-tidy

@@ -32,7 +32,6 @@ Checks: >
         -modernize-return-braced-init-list,
         -modernize-use-auto,
         -modernize-use-equals-delete,
-        -modernize-use-default-member-init,
         -modernize-use-nodiscard,
         -modernize-use-trailing-return-type,
         -readability-avoid-nested-conditional-operator,

simplecpp.cpp

@@ -386,8 +386,7 @@ class StdCharBufStream : public simplecpp::TokenList::Stream {
     StdCharBufStream(const unsigned char* str, std::size_t size)
         : str(str)
         , size(size)
-        , pos(0)
-        , lastStatus(0) {
+    {
         init();
     }
 
@@ -411,17 +410,16 @@ class StdCharBufStream : public simplecpp::TokenList::Stream {
 private:
     const unsigned char *str;
     const std::size_t size;
-    std::size_t pos;
-    int lastStatus;
+    std::size_t pos{};
+    int lastStatus{};
 };
 
 class FileStream : public simplecpp::TokenList::Stream {
 public:
     // cppcheck-suppress uninitDerivedMemberVar - we call Stream::init() to initialize the private members
     explicit FileStream(const std::string &filename, std::vector<std::string> &files)
         : file(fopen(filename.c_str(), "rb"))
-        , lastCh(0)
-        , lastStatus(0) {
+    {
         if (!file) {
             files.push_back(filename);
             throw simplecpp::Output(files, simplecpp::Output::FILE_NOT_FOUND, "File is missing: " + filename);
@@ -465,8 +463,8 @@ class FileStream : public simplecpp::TokenList::Stream {
     FileStream &operator=(const FileStream&);
 
     FILE *file;
-    int lastCh;
-    int lastStatus;
+    int lastCh{};
+    int lastStatus{};
 };
 
 simplecpp::TokenList::TokenList(std::vector<std::string> &filenames) : frontToken(nullptr), backToken(nullptr), files(filenames) {}
@@ -1487,7 +1485,7 @@ namespace simplecpp {
 
     class Macro {
     public:
-        explicit Macro(std::vector<std::string> &f) : nameTokDef(nullptr), valueToken(nullptr), endToken(nullptr), files(f), tokenListDefine(f), variadic(false), variadicOpt(false), optExpandValue(nullptr), optNoExpandValue(nullptr), valueDefinedInCode_(false) {}
+        explicit Macro(std::vector<std::string> &f) : nameTokDef(nullptr), valueToken(nullptr), endToken(nullptr), files(f), tokenListDefine(f), variadic(false), variadicOpt(false), valueDefinedInCode_(false) {}
 
         Macro(const Token *tok, std::vector<std::string> &f) : nameTokDef(nullptr), files(f), tokenListDefine(f), valueDefinedInCode_(true) {
             if (sameline(tok->previousSkipComments(), tok))

simplecpp.h

@@ -76,7 +76,7 @@ namespace simplecpp {
      */
     class SIMPLECPP_LIB Location {
     public:
-        explicit Location(const std::vector<std::string> &f) : files(f), fileIndex(0), line(1U), col(0U) {}
+        explicit Location(const std::vector<std::string> &f) : files(f) {}
 
         Location(const Location &loc) = default;
 
@@ -109,9 +109,9 @@ namespace simplecpp {
         }
 
         const std::vector<std::string> &files;
-        unsigned int fileIndex;
-        unsigned int line;
-        unsigned int col;
+        unsigned int fileIndex{};
+        unsigned int line{1};
+        unsigned int col{};
     private:
         static const std::string emptyFileName;
     };
@@ -123,12 +123,12 @@ namespace simplecpp {
     class SIMPLECPP_LIB Token {
     public:
         Token(const TokenString &s, const Location &loc, bool wsahead = false) :
-            whitespaceahead(wsahead), location(loc), previous(nullptr), next(nullptr), nextcond(nullptr), string(s) {
+            whitespaceahead(wsahead), location(loc), string(s) {
             flags();
         }
 
         Token(const Token &tok) :
-            macro(tok.macro), op(tok.op), comment(tok.comment), name(tok.name), number(tok.number), whitespaceahead(tok.whitespaceahead), location(tok.location), previous(nullptr), next(nullptr), nextcond(nullptr), string(tok.string), mExpandedFrom(tok.mExpandedFrom) {}
+            macro(tok.macro), op(tok.op), comment(tok.comment), name(tok.name), number(tok.number), whitespaceahead(tok.whitespaceahead), location(tok.location), string(tok.string), mExpandedFrom(tok.mExpandedFrom) {}
 
         const TokenString& str() const {
             return string;
@@ -153,9 +153,9 @@ namespace simplecpp {
         bool number;
         bool whitespaceahead;
         Location location;
-        Token *previous;
-        Token *next;
-        mutable const Token *nextcond;
+        Token *previous{};
+        Token *next{};
+        mutable const Token *nextcond{};
 
         const Token *previousSkipComments() const {
             const Token *tok = this->previous;
@@ -393,14 +393,14 @@ namespace simplecpp {
      * On the command line these are configured by -D, -U, -I, --include, -std
      */
     struct SIMPLECPP_LIB DUI {
-        DUI() : clearIncludeCache(false), removeComments(false) {}
+        DUI() = default;
         std::list<std::string> defines;
         std::set<std::string> undefined;
         std::list<std::string> includePaths;
         std::list<std::string> includes;
         std::string std;
-        bool clearIncludeCache;
-        bool removeComments; /** remove comment tokens from included files */
+        bool clearIncludeCache{};
+        bool removeComments{}; /** remove comment tokens from included files */
     };
 
     struct SIMPLECPP_LIB FileData {