gcc/testsuite/gdc.test/fail_compilation/diag10862.d

   1 /*
   2 TEST_OUTPUT:
   3 ---
   4 fail_compilation/diag10862.d(28): Error: assignment cannot be used as a condition, perhaps `==` was meant?
   5 fail_compilation/diag10862.d(29): Error: assignment cannot be used as a condition, perhaps `==` was meant?
   6 fail_compilation/diag10862.d(30): Error: assignment cannot be used as a condition, perhaps `==` was meant?
   7 fail_compilation/diag10862.d(31): Error: assignment cannot be used as a condition, perhaps `==` was meant?
   8 fail_compilation/diag10862.d(32): Error: assignment cannot be used as a condition, perhaps `==` was meant?
   9 fail_compilation/diag10862.d(34): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  10 fail_compilation/diag10862.d(35): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  11 fail_compilation/diag10862.d(36): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  12 fail_compilation/diag10862.d(37): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  13 fail_compilation/diag10862.d(39): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  14 fail_compilation/diag10862.d(40): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  15 fail_compilation/diag10862.d(41): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  16 fail_compilation/diag10862.d(42): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  17 fail_compilation/diag10862.d(44): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  18 fail_compilation/diag10862.d(45): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  19 fail_compilation/diag10862.d(46): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  20 fail_compilation/diag10862.d(47): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  21 fail_compilation/diag10862.d(49): Error: undefined identifier `semanticError`
  22 ---
  23 */
  24 void test1()
  25 {
  26     int a, b;
  27
  28     if (a = b) {}
  29     if ((a = b) = 0) {}
  30     if ((a = b) = (a = b)) {}
  31     if (a = 0, b = 0) {}        // Bugzilla 15384
  32     if (auto x = a = b) {}      // this is error, today
  33
  34     while (a = b) {}
  35     while ((a = b) = 0) {}
  36     while ((a = b) = (a = b)) {}
  37     while (a = 0, b = 0) {}     // Bugzilla 15384
  38
  39     do {} while (a = b);
  40     do {} while ((a = b) = 0);
  41     do {} while ((a = b) = (a = b));
  42     do {} while (a = 0, b = 0); // Bugzilla 15384
  43
  44     for (;  a = b; ) {}
  45     for (;  (a = b) = 0; ) {}
  46     for (;  (a = b) = (a = b); ) {}
  47     for (;  a = 0, b = 0; ) {}  // Bugzilla 15384
  48
  49     semanticError;
  50 }
  51
  52 /*
  53 TEST_OUTPUT:
  54 ---
  55 fail_compilation/diag10862.d(74): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  56 fail_compilation/diag10862.d(77): Error: assignment cannot be used as a condition, perhaps `==` was meant?
  57 fail_compilation/diag10862.d-mixin-80(80): Error: assignment cannot be used as a condition, perhaps == was meant?
  58 fail_compilation/diag10862.d-mixin-81(81): Error: assignment cannot be used as a condition, perhaps == was meant?
  59 fail_compilation/diag10862.d-mixin-82(82): Error: assignment cannot be used as a condition, perhaps == was meant?
  60 fail_compilation/diag10862.d-mixin-83(83): Deprecation: Using the result of a comma expression is deprecated
  61 fail_compilation/diag10862.d-mixin-83(83): Error: assignment cannot be used as a condition, perhaps == was meant?
  62 fail_compilation/diag10862.d-mixin-86(86): Error: a + b is not an lvalue
  63 fail_compilation/diag10862.d-mixin-87(87): Error: undefined identifier `c`
  64 fail_compilation/diag10862.d(89): Error: undefined identifier `semanticError`
  65 ---
  66 */
  67 void test2()
  68 {
  69     int a, b;
  70
  71     // (a + b) cannot be an assignment target.
  72     // However checkAssignAsCondition specilatively rerites it to EqualExp,
  73     // then the pointless error "is not an lvalue" would not happen.
  74     if (a + b = a * b) {}
  75
  76     // The suggestion error masks "undefined identifier" error
  77     if (a = undefinedIdentifier) {}
  78
  79     // If the condition is a mixin expression
  80     if (mixin("a = b")) {}
  81     if (mixin("(a = b) = 0")) {}
  82     if (mixin("(a = b) = (a = b)")) {}
  83     if (mixin("a = 0, b = 0")) {}
  84     if (auto x = mixin("a = b")) {}     // Note: no error
  85
  86     if (mixin("a + b = a * b")) {}      // Note: "a + b is not an lvalue"
  87     if (mixin("a = c")) {}
  88
  89     semanticError;
  90 }