clang/test/SemaCXX/warn-absolute-value-header.cpp

   1 // RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -verify %s -Wabsolute-value
   2 // RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only %s -Wabsolute-value -fdiagnostics-parseable-fixits 2>&1 | FileCheck %s
   3
   4 extern "C" {
   5   int abs(int);
   6   float fabsf(float);
   7 }
   8
   9 namespace std {
  10   int abs(int);
  11   float abs(float);
  12 }
  13
  14 void test(long long ll, double d, int i, float f) {
  15   // Suggest including cmath
  16   (void)abs(d);
  17   // expected-warning@-1{{using integer absolute value function 'abs' when argument is of floating point type}}
  18   // expected-note@-2{{use function 'std::abs' instead}}
  19   // expected-note@-3{{include the header <cmath> or explicitly provide a declaration for 'std::abs'}}
  20   // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:9-[[@LINE-4]]:12}:"std::abs"
  21
  22   (void)fabsf(d);
  23   // expected-warning@-1{{absolute value function 'fabsf' given an argument of type 'double' but has parameter of type 'float' which may cause truncation of value}}
  24   // expected-note@-2{{use function 'std::abs' instead}}
  25   // expected-note@-3{{include the header <cmath> or explicitly provide a declaration for 'std::abs'}}
  26   // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:9-[[@LINE-4]]:14}:"std::abs"
  27
  28   // Suggest including cstdlib
  29   (void)abs(ll);
  30   // expected-warning@-1{{absolute value function 'abs' given an argument of type 'long long' but has parameter of type 'int' which may cause truncation of value}}
  31   // expected-note@-2{{use function 'std::abs' instead}}
  32   // expected-note@-3{{include the header <cstdlib> or explicitly provide a declaration for 'std::abs'}}
  33   // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:9-[[@LINE-4]]:12}:"std::abs"
  34   (void)fabsf(ll);
  35   // expected-warning@-1{{using floating point absolute value function 'fabsf' when argument is of integer type}}
  36   // expected-note@-2{{use function 'std::abs' instead}}
  37   // expected-note@-3{{include the header <cstdlib> or explicitly provide a declaration for 'std::abs'}}
  38   // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:9-[[@LINE-4]]:14}:"std::abs"
  39
  40   // Proper function already called, no warnings.
  41   (void)abs(i);
  42   (void)fabsf(f);
  43
  44   // Declarations found, suggest name change.
  45   (void)fabsf(i);
  46   // expected-warning@-1{{using floating point absolute value function 'fabsf' when argument is of integer type}}
  47   // expected-note@-2{{use function 'std::abs' instead}}
  48   // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:9-[[@LINE-3]]:14}:"std::abs"
  49   (void)abs(f);
  50   // expected-warning@-1{{using integer absolute value function 'abs' when argument is of floating point type}}
  51   // expected-note@-2{{use function 'std::abs' instead}}
  52   // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:9-[[@LINE-3]]:12}:"std::abs"
  53 }