Support C++14 [[deprecated]]

lib/tokenize.cpp

@@ -3208,6 +3208,9 @@ bool Tokenizer::simplifyTokenList1(const char FileName[])
     if (_settings->terminated())
         return false;
 
+    // Remove [[deprecated]]
+    simplifyDeprecated();
+
     // Simplify the C alternative tokens (and, or, etc.)
     simplifyCAlternativeTokens();
 
@@ -10091,6 +10094,19 @@ void Tokenizer::removeUnnecessaryQualification()
     }
 }
 
+void Tokenizer::simplifyDeprecated()
+{
+    if (_settings->standards.cpp != Standards::CPP11 || isC())
+        return; // It is actually a C++14 feature, however, there seems to be nothing dangerous about removing it for C++11 as well
+
+    for (Token *tok = list.front(); tok; tok = tok->next()) {
+        if (tok->link() && Token::simpleMatch(tok, "[ [ deprecated")) {
+            Token::eraseTokens(tok, tok->link()->next());
+            tok->deleteThis();
+        }
+    }
+}
+
 void Tokenizer::unnecessaryQualificationError(const Token *tok, const std::string &qualification) const
 {
     reportError(tok, Severity::portability, "unnecessaryQualification",

lib/tokenize.h

@@ -681,6 +681,11 @@ public:
      */
     void simplifyOperatorName();
 
+    /**
+    * Remove [[deprecated]] (C++14) from TokenList
+    */
+    void simplifyDeprecated();
+
     /**
      * check for duplicate enum definition
      */

test/testtokenize.cpp

@@ -455,6 +455,8 @@ private:
         TEST_CASE(simplifyMathExpressions); //ticket #1620
         TEST_CASE(simplifyStaticConst);
 
+        TEST_CASE(simplifyDeprecated);
+
         TEST_CASE(compileLimits); // #5592 crash: gcc: testsuit: gcc.c-torture/compile/limits-declparen.c
 
         // AST data
@@ -8358,6 +8360,17 @@ private:
         ASSERT_EQUALS(expected2, tokenizeAndStringify(code2, true));
     }
 
+    void simplifyDeprecated() {
+        ASSERT_EQUALS("int f ( ) ;",
+                      tokenizeAndStringify("[[deprecated]] int f();", false, true, Settings::Unspecified, "test.cpp", true));
+
+        ASSERT_EQUALS("[ [ deprecated ] ] int f ( ) ;",
+                      tokenizeAndStringify("[[deprecated]] int f();", false, true, Settings::Unspecified, "test.cpp", false));
+
+        ASSERT_EQUALS("[ [ deprecated ] ] int f ( ) ;",
+                      tokenizeAndStringify("[[deprecated]] int f();", false, true, Settings::Unspecified, "test.c", true));
+    }
+
     static std::string testAst(const char code[],bool verbose=false) {
         // tokenize given code..
         const Settings settings;