Improve coverage for %j used with printf

Author: Dmitry-Me

test/testio.cpp

@@ -1452,6 +1452,21 @@ class TestIO : public TestFixture {
                       "[test.cpp:5]: (warning) %s in format string (no. 1) requires 'char *' but the argument type is 'std::string'.\n"
                       "[test.cpp:7]: (warning) %u in format string (no. 1) requires 'unsigned int' but the argument type is 'char *'.\n", errout.str());
 
+        check("void foo(char* s, const char* s2, std::string s3, int i) {\n"
+              "    printf(\"%jd\", s);\n"
+              "    printf(\"%ji\", s);\n"
+              "    printf(\"%ju\", s2);\n"
+              "    printf(\"%jo\", s3);\n"
+              "    printf(\"%jx\", i);\n"
+              "    printf(\"%jX\", i);\n"
+              "}");
+        ASSERT_EQUALS("[test.cpp:2]: (warning) %jd in format string (no. 1) requires 'intmax_t' but the argument type is 'char *'.\n"
+                      "[test.cpp:3]: (warning) %ji in format string (no. 1) requires 'intmax_t' but the argument type is 'char *'.\n"
+                      "[test.cpp:4]: (warning) %ju in format string (no. 1) requires 'uintmax_t' but the argument type is 'const char *'.\n"
+                      "[test.cpp:5]: (warning) %jo in format string (no. 1) requires 'uintmax_t' but the argument type is 'std::string'.\n"
+                      "[test.cpp:6]: (warning) %jx in format string (no. 1) requires 'uintmax_t' but the argument type is 'signed int'.\n"
+                      "[test.cpp:7]: (warning) %jX in format string (no. 1) requires 'uintmax_t' but the argument type is 'signed int'.\n", errout.str());
+
         check("void foo(const int* cpi, const int ci, int i, int* pi, std::string s) {\n"
               "    printf(\"%n\", cpi);\n"
               "    printf(\"%n\", ci);\n"