Move string literal to bool conversion into its own warning flag -Wstring-conversion.

llvm-svn: 140574

clang/include/clang/Basic/DiagnosticGroups.td

@@ -227,6 +227,7 @@ def Conversion : DiagGroup<"conversion",
                            [DiagGroup<"shorten-64-to-32">,
                             DiagGroup<"constant-conversion">,
                             DiagGroup<"literal-conversion">,
+                            DiagGroup<"string-convervion">,
                             DiagGroup<"sign-conversion">,
                             BoolConversions]>,
                  DiagCategory<"Value Conversion Issue">;

clang/include/clang/Basic/DiagnosticSemaKinds.td

@@ -1478,7 +1478,7 @@ def warn_impcast_literal_float_to_integer : Warning<
   InGroup<DiagGroup<"literal-conversion">>, DefaultIgnore;
 def warn_impcast_string_literal_to_bool : Warning<
   "implicit conversion turns string literal into bool: %0 to %1">,
-  InGroup<DiagGroup<"literal-conversion">>, DefaultIgnore;
+  InGroup<DiagGroup<"string-conversion">>, DefaultIgnore;
 def note_fix_integral_float_as_integer : Note<
   "this can be rewritten as an integer literal with the exact same value">;
 def warn_impcast_different_enum_types : Warning<

clang/test/SemaCXX/warn-literal-conversion.cpp

@@ -43,19 +43,3 @@ void test0() {
   int y = (24*60*60) * 0.25;
   int pennies = 123.45 * 100;
 }
-
-// Warn on cases where a string literal is converted into a bool.
-// An exception is made for this in logical operators.
-void assert(bool condition);
-void test1() {
-  bool b0 = "hi"; // expected-warning{{implicit conversion turns string literal into bool: 'const char [3]' to 'bool'}}
-  b0 = ""; // expected-warning{{implicit conversion turns string literal into bool: 'const char [1]' to 'bool'}}
-  b0 = 0 && "";
-  assert("error"); // expected-warning{{implicit conversion turns string literal into bool: 'const char [6]' to 'bool'}}
-  assert(0 && "error");
-
-  while("hi") {} // expected-warning{{implicit conversion turns string literal into bool: 'const char [3]' to 'bool'}}
-  do {} while("hi"); // expected-warning{{implicit conversion turns string literal into bool: 'const char [3]' to 'bool'}}
-  for (;"hi";); // expected-warning{{implicit conversion turns string literal into bool: 'const char [3]' to 'bool'}}
-  if("hi") {} // expected-warning{{implicit conversion turns string literal into bool: 'const char [3]' to 'bool'}}
-}

clang/test/SemaCXX/warn-string-conversion.cpp

@@ -0,0 +1,18 @@
+// RUN: %clang_cc1 -fsyntax-only -Wstring-conversion -verify %s
+
+// Warn on cases where a string literal is converted into a bool.
+// An exception is made for this in logical operators.
+void assert(bool condition);
+void test0() {
+  bool b0 = "hi"; // expected-warning{{implicit conversion turns string literal into bool: 'const char [3]' to 'bool'}}
+  b0 = ""; // expected-warning{{implicit conversion turns string literal into bool: 'const char [1]' to 'bool'}}
+  b0 = 0 && "";
+  assert("error"); // expected-warning{{implicit conversion turns string literal into bool: 'const char [6]' to 'bool'}}
+  assert(0 && "error");
+
+  while("hi") {} // expected-warning{{implicit conversion turns string literal into bool: 'const char [3]' to 'bool'}}
+  do {} while("hi"); // expected-warning{{implicit conversion turns string literal into bool: 'const char [3]' to 'bool'}}
+  for (;"hi";); // expected-warning{{implicit conversion turns string literal into bool: 'const char [3]' to 'bool'}}
+  if("hi") {} // expected-warning{{implicit conversion turns string literal into bool: 'const char [3]' to 'bool'}}
+}
+