Fix #14067 (cmdlineparser: tweaks to --premium) (cppcheck-opensource#7734)

Author: danmar

cli/cmdlineparser.cpp

@@ -1103,12 +1103,14 @@ CmdLineParser::Result CmdLineParser::parseFromArgs(int argc, const char* const a
                 mSettings.premiumArgs += " ";
             const std::string p(argv[i] + 10);
             const std::string p2(p.find('=') != std::string::npos ? p.substr(0, p.find('=')) : "");
-            if (!valid.count(p) && !valid2.count(p2)) {
+            const bool isCodingStandard = startsWith(p, "autosar") || startsWith(p,"cert-") || startsWith(p,"misra-");
+            const std::string p3(endsWith(p,":all") && isCodingStandard ? p.substr(0,p.rfind(':')) : p);
+            if (!valid.count(p3) && !valid2.count(p2)) {
                 mLogger.printError("invalid --premium option '" + (p2.empty() ? p : p2) + "'.");
                 return Result::Fail;
             }
             mSettings.premiumArgs += "--" + p;
-            if (startsWith(p, "autosar") || startsWith(p, "cert") || startsWith(p, "misra")) {
+            if (isCodingStandard) {
                 // All checkers related to the coding standard should be enabled. The coding standards
                 // do not all undefined behavior or portability issues.
                 mSettings.addEnabled("warning");
@@ -1862,9 +1864,13 @@ void CmdLineParser::printHelp() const
             "                          * misra-c-2025      Misra C 2025\n"
             "                          * misra-c++-2008    Misra C++ 2008\n"
             "                          * misra-c++-2023    Misra C++ 2023\n"
+            "                         By default 'Misra/Cert C' only checks C files.\n"
+            "                         By default 'Autosar/Misra/Cert C++' only checks C++ files.\n"
+            "                         To check all files, append \":all\" i.e. --premium=misra-c++-2023:all.\n"
             "                         Other:\n"
             "                          * bughunting        Soundy analysis\n"
             "                          * cert-c-int-precision=BITS  Integer precision to use in Cert C analysis.\n"
+            "                          * metrics           Calculate metrics. Metrics are only reported in xmlv3 output.\n"
             "                          * safety            Turn on safety certified behavior (ON by default)\n"
             "                          * safety-off        Turn off safety certified behavior\n";
     }

man/manual-premium.md

@@ -1272,6 +1272,21 @@ Command to activate Misra C++ 2023 checkers:
 
     cppcheck --premium=misra-c++-2023 ....
 
+### Checking all C and C++ files
+
+The `cert-c` and `misra-c-*` coding standards target C and therefore the checkers only check C files by default.
+
+The `autosar`, `cert-c++` and `misra-c++-*` coding standards target C++ and therefore the checkers only check C++ files by default.
+
+If you want to check all files you can append ":all" to the coding standard. Example:
+
+    # Misra C checkers are executed on C files, not on C++ files
+    cppcheck --premium=misra-c-2025 path
+
+    # Misra C checkers are executed on C and C++ files
+    cppcheck --premium=misra-c-2025:all path
+
+
 ## Compliance report
 
 ### Graphical user interface

test/testcmdlineparser.cpp

@@ -236,6 +236,7 @@ class TestCmdlineParser : public TestFixture {
         TEST_CASE(premiumOptions3);
         TEST_CASE(premiumOptions4);
         TEST_CASE(premiumOptions5);
+        TEST_CASE(premiumOptionsAll);
         TEST_CASE(premiumOptionsMetrics);
         TEST_CASE(premiumOptionsCertCIntPrecision);
         TEST_CASE(premiumOptionsLicenseFile);
@@ -1456,6 +1457,23 @@ class TestCmdlineParser : public TestFixture {
         ASSERT_EQUALS(false, settings->severity.isEnabled(Severity::warning));
     }
 
+    void premiumOptionsAll() {
+        REDIRECT;
+        asPremium();
+        const char * const argv[] = {
+            "cppcheck",
+            "--premium=autosar:all",
+            "--premium=cert-c:all",
+            "--premium=cert-c++:all",
+            "--premium=misra-c-2023:all",
+            "--premium=misra-c++-2023:all",
+            "file.c"
+        };
+        ASSERT_EQUALS_ENUM(CmdLineParser::Result::Success, parseFromArgs(argv));
+        ASSERT_EQUALS("--autosar:all --cert-c:all --cert-c++:all --misra-c-2023:all --misra-c++-2023:all",
+                      settings->premiumArgs);
+    }
+
     void premiumOptionsMetrics() {
         REDIRECT;
         asPremium();