clang/test/C/drs/dr324.c

   1 /* RUN: rm -rf %t && mkdir %t
   2    RUN: cp %s %t/dr324.c
   3
   4    Note: this file (dr324.c) must be newer than the file used for the
   5      dependency pragma (dep.c), otherwise we get an unrelated "current file is
   6      older than dependency" warning. Touch dep.c first to make sure it's
   7      always older.
   8    RUN: touch %t/dep.c
   9    RUN: touch %t/dr324.c
  10
  11    RUN: %clang_cc1 -std=c89 -fsyntax-only -fms-extensions -pedantic -verify %t/dr324.c
  12    RUN: %clang_cc1 -std=c99 -fsyntax-only -fms-extensions -pedantic -verify %t/dr324.c
  13    RUN: %clang_cc1 -std=c11 -fsyntax-only -fms-extensions -pedantic -verify %t/dr324.c
  14    RUN: %clang_cc1 -std=c17 -fsyntax-only -fms-extensions -pedantic -verify %t/dr324.c
  15    RUN: %clang_cc1 -std=c2x -fsyntax-only -fms-extensions -pedantic -verify %t/dr324.c
  16  */
  17
  18 /* WG14 DR324: yes
  19  * Tokenization obscurities
  20  */
  21
  22 /* We need to diagnose an unknown escape sequence in a string or character
  23  * literal, but not within a header-name terminal.
  24  */
  25 const char *lit_str = "\y"; /* expected-warning {{unknown escape sequence '\y'}} */
  26 char lit_char = '\y';       /* expected-warning {{unknown escape sequence '\y'}} */
  27
  28 /* This gets trickier in a pragma where there are implementation-defined
  29  * locations that may use a header-name production. The first pragma below
  30  * is using \d but it's in a header-name use rather than a string-literal use.
  31  * The second pragma is a string-literal and so the \d is invalid there.
  32  */
  33 #ifdef _WIN32
  34 /* This test only makes sense on Windows targets, where the backslash is a valid
  35  * path separator.
  36  */
  37 #pragma GCC dependency "oops\..\dep.c"
  38 #endif
  39 #pragma message("this has a \t tab escape and an invalid \d escape") /* expected-warning {{this has a    tab escape and an invalid d escape}}
  40                                                                         expected-warning {{unknown escape sequence '\d'}}
  41                                                                       */
  42
  43 /*
  44  * Note, this tests the behavior of a non-empty source file that ends with a
  45  * partial preprocessing token such as an unterminated string or character
  46  * literal. Thus, it is important that no code be added after this test case.
  47  */
  48 /* expected-error@+3 {{expected identifier or '('}}
  49    expected-warning@+3 {{missing terminating ' character}}
  50  */
  51 't