src/llvm/tools/clang/test/FixIt/fixit-vexing-parse.cpp

   1 // RUN: %clang_cc1 -verify -x c++ %s
   2 // RUN: %clang_cc1 -fdiagnostics-parseable-fixits -x c++ %s 2>&1 | FileCheck %s
   3
   4 struct S {
   5   int n;
   6 };
   7
   8 struct T {
   9   T();
  10   T(S, S);
  11   int n;
  12 };
  13
  14 struct U {
  15   ~U();
  16   int n;
  17 };
  18
  19 struct V {
  20   ~V();
  21 };
  22
  23 struct W : V {
  24 };
  25
  26 struct X : U {
  27 };
  28
  29 int F1();
  30 S F2();
  31
  32 namespace N {
  33   void test() {
  34     // CHECK: fix-it:"{{.*}}":{35:9-35:11}:" = {}"
  35     S s1(); // expected-warning {{function declaration}} expected-note {{replace parentheses with an initializer}}
  36
  37     // CHECK: fix-it:"{{.*}}":{39:9-39:10}:";"
  38     // CHECK: fix-it:"{{.*}}":{40:7-40:9}:" = {}"
  39     S s2, // expected-note {{change this ',' to a ';' to call 'F2'}}
  40     F2(); // expected-warning {{function declaration}} expected-note {{replace parentheses with an initializer}}
  41
  42     // CHECK: fix-it:"{{.*}}":{44:9-44:11}:""
  43     // CHECK: fix-it:"{{.*}}":{45:9-45:11}:""
  44     T t1(), // expected-warning {{function declaration}} expected-note {{remove parentheses}}
  45       t2(); // expected-warning {{function declaration}} expected-note {{remove parentheses}}
  46
  47     // Suggest parentheses only around the first argument.
  48     // CHECK: fix-it:"{{.*}}":{50:10-50:10}:"("
  49     // CHECK: fix-it:"{{.*}}":{50:13-50:13}:")"
  50     T t3(S(), S()); // expected-warning {{disambiguated as a function declaration}} expected-note {{add a pair of parentheses}}
  51
  52     // Check fixit position for pathological case
  53     // CHECK: fix-it:"{{.*}}":{56:11-56:11}:"("
  54     // CHECK: fix-it:"{{.*}}":{56:20-56:20}:")"
  55     float k[1];
  56     int l(int(k[0])); // expected-warning {{disambiguated as a function declaration}} expected-note {{add a pair of parentheses}}
  57
  58     // Don't emit warning and fixit because this must be a function declaration due to void return type.
  59     typedef void VO;
  60     VO m(int (*p)[4]);
  61
  62     // Don't emit warning and fixit because direct initializer is not permitted here.
  63     if (int n(int())){} // expected-error {{function type is not allowed here}} expected-error {{condition must have an initializer}}
  64
  65     // CHECK: fix-it:"{{.*}}":{66:8-66:10}:" = {}"
  66     U u(); // expected-warning {{function declaration}} expected-note {{replace parentheses with an initializer}}
  67
  68     // CHECK: fix-it:"{{.*}}":{69:8-69:10}:""
  69     V v(); // expected-warning {{function declaration}} expected-note {{remove parentheses}}
  70
  71     // CHECK: fix-it:"{{.*}}":{72:8-72:10}:""
  72     W w(); // expected-warning {{function declaration}} expected-note {{remove parentheses}}
  73
  74     // TODO: Removing the parens here would not initialize U::n.
  75     // Maybe suggest an " = X()" initializer for this case?
  76     // Maybe suggest removing the parens anyway?
  77     X x(); // expected-warning {{function declaration}}
  78
  79     // CHECK: fix-it:"{{.*}}":{80:11-80:13}:" = 0"
  80     int n1(); // expected-warning {{function declaration}} expected-note {{replace parentheses with an initializer}}
  81
  82     // CHECK: fix-it:"{{.*}}":{84:11-84:12}:";"
  83     // CHECK: fix-it:"{{.*}}":{85:7-85:9}:" = 0"
  84     int n2, // expected-note {{change this ',' to a ';' to call 'F1'}}
  85     F1(); // expected-warning {{function declaration}} expected-note {{replace parentheses with an initializer}}
  86
  87     // CHECK: fix-it:"{{.*}}":{88:13-88:15}:" = 0.0"
  88     double d(); // expected-warning {{function declaration}} expected-note {{replace parentheses with an initializer}}
  89
  90     typedef void *Ptr;
  91
  92     // CHECK: fix-it:"{{.*}}":{93:10-93:12}:" = 0"
  93     Ptr p(); // expected-warning {{function declaration}} expected-note {{replace parentheses with an initializer}}
  94
  95 #define NULL 0
  96     // CHECK: fix-it:"{{.*}}":{97:10-97:12}:" = NULL"
  97     Ptr p(); // expected-warning {{function declaration}} expected-note {{replace parentheses with an initializer}}
  98
  99     // CHECK: fix-it:"{{.*}}":{100:11-100:13}:" = false"
 100     bool b(); // expected-warning {{function declaration}} expected-note {{replace parentheses with an initializer}}
 101
 102     // CHECK: fix-it:"{{.*}}":{103:11-103:13}:" = '\\0'"
 103     char c(); // expected-warning {{function declaration}} expected-note {{replace parentheses with an initializer}}
 104
 105     // CHECK: fix-it:"{{.*}}":{106:15-106:17}:" = L'\\0'"
 106     wchar_t wc(); // expected-warning {{function declaration}} expected-note {{replace parentheses with an initializer}}
 107   }
 108 }