clang/test/Sema/string-concat.c

   1
   2 // RUN: %clang_cc1 -x c -Wstring-concatenation -fsyntax-only -verify %s
   3 // RUN: %clang_cc1 -x c++ -Wstring-concatenation -fsyntax-only -verify %s
   4
   5 const char *missing_comma[] = {
   6     "basic_filebuf",
   7     "basic_ios",
   8     "future",
   9     "optional",
  10     "packaged_task" // expected-note{{place parentheses around the string literal to silence warning}}
  11     "promise",      // expected-warning{{suspicious concatenation of string literals in an array initialization; did you mean to separate the elements with a comma?}}
  12     "shared_future"
  13 };
  14
  15 #ifndef __cplusplus
  16 typedef __WCHAR_TYPE__ wchar_t;
  17 #endif
  18
  19 const wchar_t *missing_comma_wchar[] = {
  20     L"basic_filebuf",
  21     L"packaged_task" // expected-note{{place parentheses around the string literal to silence warning}}
  22     L"promise",      // expected-warning{{suspicious concatenation of string literals in an array initialization; did you mean to separate the elements with a comma?}}
  23     L"shared_future"
  24 };
  25
  26 #if __cplusplus >= 201103L
  27 const char *missing_comma_u8[] = {
  28     u8"basic_filebuf",
  29     u8"packaged_task" // expected-note{{place parentheses around the string literal to silence warning}}
  30     u8"promise",      // expected-warning{{suspicious concatenation of string literals in an array initialization; did you mean to separate the elements with a comma?}}
  31     u8"shared_future"
  32 };
  33 #endif
  34
  35 const char *missing_comma_same_line[] = {"basic_filebuf", "basic_ios",
  36                        "future" "optional",         // expected-note{{place parentheses around the string literal to silence warning}}
  37                        "packaged_task", "promise"}; // expected-warning@-1{{suspicious concatenation of string literals in an array initialization; did you mean to separate the elements with a comma?}}
  38
  39 const char *missing_comma_different_lines[] = {"basic_filebuf", "basic_ios" // expected-note{{place parentheses around the string literal to silence warning}}
  40                        "future", "optional",        // expected-warning{{suspicious concatenation of string literals in an array initialization; did you mean to separate the elements with a comma?}}
  41                        "packaged_task", "promise"};
  42
  43 const char *missing_comma_same_line_all_literals[] = {"basic_filebuf", "future" "optional", "packaged_task"}; // expected-note{{place parentheses around the string literal to silence warning}}
  44                                                                                // expected-warning@-1{{suspicious concatenation of string literals in an array initialization; did you mean to separate the elements with a comma?}}
  45
  46 char missing_comma_inner[][5] = {
  47     "a",
  48     "b",
  49     "c" // expected-note{{place parentheses around the string literal to silence warning}}
  50     "d" // expected-warning{{suspicious concatenation of string literals in an array initialization; did you mean to separate the elements with a comma?}}
  51 };
  52
  53 const char *warn[] = { "cpll", "gpll", "hdmiphy" "usb480m" }; // expected-note{{place parentheses around the string literal to silence warning}}
  54 // expected-warning@-1{{suspicious concatenation of string literals in an array initialization; did you mean to separate the elements with a comma?}}
  55
  56 const char *missing_two_commas_ignore[] = {"basic_filebuf",
  57                        "basic_ios"
  58                        "future"
  59                        "optional",
  60                        "packaged_task"};
  61
  62 #define ONE(x) x
  63 #define TWO "foo"
  64 const char *macro_test[] = { ONE("foo"),
  65                              TWO,
  66                              "foo" TWO // expected-note{{place parentheses around the string literal to silence warning}}
  67                            };          // expected-warning@-1{{suspicious concatenation of string literals in an array initialization; did you mean to separate the elements with a comma?}}
  68
  69 // Do not warn for macros.
  70
  71 #define BASIC_IOS "basic_ios"
  72 #define FUTURE "future"
  73 const char *macro_test2[] = {"basic_filebuf", BASIC_IOS
  74                         FUTURE, "optional",
  75                        "packaged_task", "promise"};
  76
  77 #define FOO(xx) xx "_normal", \
  78                 xx "_movable",
  79
  80 const char *macro_test3[] = {"basic_filebuf",
  81                        "basic_ios",
  82                        FOO("future")
  83                        "optional",
  84                        "packaged_task"};
  85
  86 #define BAR(name) #name "_normal"
  87
  88 const char *macro_test4[] = {"basic_filebuf",
  89                        "basic_ios",
  90                        BAR(future),
  91                        "optional",
  92                        "packaged_task"};
  93
  94 #define SUPPRESS(x) x
  95 const char *macro_test5[] = { SUPPRESS("foo" "bar"), "baz" };
  96
  97 typedef struct {
  98     int i;
  99     const char s[11];
 100 } S;
 101
 102 S s = {1, "hello" "world"};
 103
 104 const char *not_warn[] = {
 105     "hello"
 106     "world", "test"
 107 };
 108
 109 const char *not_warn2[] = {
 110     "// Aaa\\\n"   " Bbb\\ \n"   " Ccc?" "?/\n",
 111     "// Aaa\\\r\n" " Bbb\\ \r\n" " Ccc?" "?/\r\n",
 112     "// Aaa\\\r"   " Bbb\\ \r"   " Ccc?" "?/\r"
 113 };
 114
 115 const char *not_warn3[] = {
 116   "// \\tparam aaa Bbb\n",
 117   "// \\tparam\n"
 118   "//     aaa Bbb\n",
 119   "// \\tparam \n"
 120   "//     aaa Bbb\n",
 121   "// \\tparam aaa\n"
 122   "// Bbb\n"
 123 };
 124
 125 const char *not_warn4[] =  {"title",
 126                "aaaa "
 127                "bbbb "
 128                "cccc "
 129                "ddd.",
 130                "url"
 131 };
 132
 133 typedef struct {
 134   const char *a;
 135   const char *b;
 136   const char *c;
 137 } A;
 138
 139 const A not_warn5 = (A){"",
 140                         ""
 141                         "",
 142                         ""};
 143
 144 #ifdef __cplusplus
 145 const A not_warn6 =  A{"",
 146                       ""
 147                       "",
 148                       ""};
 149 #endif
 150
 151 static A not_warn7 = {"",
 152
 153   ""
 154   "",
 155   ""};
 156
 157
 158 // Do not warn when all the elements in the initializer are concatenated together.
 159 const char *all_elems_in_init_concatenated[] = {"a" "b" "c"};
 160
 161 // Warning can be supressed also by extra parentheses.
 162 const char *extra_parens_to_suppress_warning[] = {
 163     "basic_filebuf",
 164     "basic_ios",
 165     "future",
 166     "optional",
 167     ("packaged_task"
 168     "promise"),
 169     "shared_future"
 170 };