[clang-tidy] convert member functions to static

Found with readability-convert-member-functions-to-static

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Author: neheb

include/yaml-cpp/emitter.h

@@ -123,7 +123,7 @@ class YAML_CPP_API Emitter {
   void SpaceOrIndentTo(bool requireSpace, std::size_t indent);
 
   const char* ComputeFullBoolName(bool b) const;
-  bool CanEmitNewline() const;
+  static bool CanEmitNewline();
 
  private:
   std::unique_ptr<EmitterState> m_pState;

src/emitter.cpp

@@ -251,7 +251,7 @@ void Emitter::EmitNewline() {
   m_pState->SetNonContent();
 }
 
-bool Emitter::CanEmitNewline() const { return true; }
+bool Emitter::CanEmitNewline() { return true; }
 
 // Put the stream in a state so we can simply write the next node
 // E.g., if we're in a sequence, write the "- "

src/scanner.cpp

@@ -269,7 +269,7 @@ Token* Scanner::PushToken(Token::TYPE type) {
   return &m_tokens.back();
 }
 
-Token::TYPE Scanner::GetStartTokenFor(IndentMarker::INDENT_TYPE type) const {
+Token::TYPE Scanner::GetStartTokenFor(IndentMarker::INDENT_TYPE type) {
   switch (type) {
     case IndentMarker::SEQ:
       return Token::BLOCK_SEQ_START;

src/scanner.h

@@ -90,7 +90,7 @@ class Scanner {
   bool InBlockContext() const { return m_flows.empty(); }
   std::size_t GetFlowLevel() const { return m_flows.size(); }
 
-  Token::TYPE GetStartTokenFor(IndentMarker::INDENT_TYPE type) const;
+  static Token::TYPE GetStartTokenFor(IndentMarker::INDENT_TYPE type);
 
   /**
    * Pushes an indentation onto the stack, and enqueues the proper token
@@ -131,7 +131,7 @@ class Scanner {
    */
   void ThrowParserException(const std::string &msg) const;
 
-  bool IsWhitespaceToBeEaten(char ch);
+  static bool IsWhitespaceToBeEaten(char ch);
 
   /**
    * Returns the appropriate regex to check if the next token is a value token.