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// RUN: %check_clang_tidy %s modernize-use-auto %t -- \
// RUN: -config="{CheckOptions: [{key: modernize-use-auto.MinTypeNameLength, value: '0'}]}" \
// RUN: -- -I %S/Inputs/use-auto -frtti
struct A {
virtual ~A() {}
};
struct B : public A {};
struct C {};
void f_static_cast() {
long l = 1;
int i1 = static_cast<int>(l);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto i1 = static_cast<int>(l);
const int i2 = static_cast<int>(l);
// CHECK-MESSAGES: :[[@LINE-1]]:9: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: const auto i2 = static_cast<int>(l);
long long ll = static_cast<long long>(l);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto ll = static_cast<long long>(l);
unsigned long long ull = static_cast<unsigned long long>(l);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto ull = static_cast<unsigned long long>(l);
unsigned int ui = static_cast<unsigned int>(l);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto ui = static_cast<unsigned int>(l);
long double ld = static_cast<long double>(l);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto ld = static_cast<long double>(l);
A *a = new B();
B *b1 = static_cast<B *>(a);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto *b1 = static_cast<B *>(a);
B *const b2 = static_cast<B *>(a);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto *const b2 = static_cast<B *>(a);
const B *b3 = static_cast<const B *>(a);
// CHECK-MESSAGES: :[[@LINE-1]]:9: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: const auto *b3 = static_cast<const B *>(a);
B &b4 = static_cast<B &>(*a);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto &b4 = static_cast<B &>(*a);
const B &b5 = static_cast<const B &>(*a);
// CHECK-MESSAGES: :[[@LINE-1]]:9: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: const auto &b5 = static_cast<const B &>(*a);
B &b6 = static_cast<B &>(*a), &b7 = static_cast<B &>(*a);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto &b6 = static_cast<B &>(*a), &b7 = static_cast<B &>(*a);
// Don't warn when non-cast involved
long double cast = static_cast<long double>(l), noncast = 5;
// Don't warn when auto is already being used.
auto i3 = static_cast<int>(l);
auto *b8 = static_cast<B *>(a);
auto &b9 = static_cast<B &>(*a);
}
void f_dynamic_cast() {
A *a = new B();
B *b1 = dynamic_cast<B *>(a);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto *b1 = dynamic_cast<B *>(a);
B &b2 = dynamic_cast<B &>(*a);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto &b2 = dynamic_cast<B &>(*a);
}
void f_reinterpret_cast() {
auto *a = new A();
C *c1 = reinterpret_cast<C *>(a);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto *c1 = reinterpret_cast<C *>(a);
C &c2 = reinterpret_cast<C &>(*a);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto &c2 = reinterpret_cast<C &>(*a);
}
void f_const_cast() {
const A *a1 = new A();
A *a2 = const_cast<A *>(a1);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto *a2 = const_cast<A *>(a1);
A &a3 = const_cast<A &>(*a1);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto &a3 = const_cast<A &>(*a1);
}
typedef unsigned char xmlChar;
#define BAD_CAST (xmlChar *)
#define XMLCHAR_CAST(x) (xmlChar *)(x)
#define CAST_IN_MACRO(x) \
do { \
xmlChar *s = (xmlChar *)(x); \
} while (false);
// CHECK-FIXES: xmlChar *s = (xmlChar *)(x);
void f_cstyle_cast() {
auto *a = new A();
C *c1 = (C *)a;
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto *c1 = (C *)a;
C &c2 = (C &)*a;
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto &c2 = (C &)*a;
xmlChar *s = BAD_CAST "xml";
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto *s = BAD_CAST "xml";
xmlChar *t = XMLCHAR_CAST("xml");
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto *t = XMLCHAR_CAST("xml");
CAST_IN_MACRO("xml");
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
}
void f_functional_cast() {
long l = 1;
int i1 = int(l);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a cast to avoid duplicating the type name
// CHECK-FIXES: auto i1 = int(l);
B b;
A a = A(b);
}
class StringRef
{
public:
StringRef(const char *);
const char *begin() const;
const char *end() const;
};
template <typename T, typename U>
T template_value_cast(const U &u);
template <typename T, typename U>
T *template_pointer_cast(U *u);
template <typename T, typename U>
T &template_reference_cast(U &u);
template <typename T, typename U>
const T *template_const_pointer_cast(const U *u);
template <typename T, typename U>
const T &template_const_reference_cast(const U &u);
template <typename T>
T template_value_get(StringRef s);
struct S {
template <typename T>
const T *template_member_get();
};
template <typename T>
T max(T t1, T t2);
void f_template_cast()
{
double d = 0;
int i1 = template_value_cast<int>(d);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a template cast to avoid duplicating the type name
// CHECK-FIXES: auto i1 = template_value_cast<int>(d);
A *a = new B();
B *b1 = template_value_cast<B *>(a);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a template cast to avoid duplicating the type name
// CHECK-FIXES: auto *b1 = template_value_cast<B *>(a);
B &b2 = template_value_cast<B &>(*a);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a template cast to avoid duplicating the type name
// CHECK-FIXES: auto &b2 = template_value_cast<B &>(*a);
B *b3 = template_pointer_cast<B>(a);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a template cast to avoid duplicating the type name
// CHECK-FIXES: auto *b3 = template_pointer_cast<B>(a);
B &b4 = template_reference_cast<B>(*a);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a template cast to avoid duplicating the type name
// CHECK-FIXES: auto &b4 = template_reference_cast<B>(*a);
const B *b5 = template_const_pointer_cast<B>(a);
// CHECK-MESSAGES: :[[@LINE-1]]:9: warning: use auto when initializing with a template cast to avoid duplicating the type name
// CHECK-FIXES: const auto *b5 = template_const_pointer_cast<B>(a);
const B &b6 = template_const_reference_cast<B>(*a);
// CHECK-MESSAGES: :[[@LINE-1]]:9: warning: use auto when initializing with a template cast to avoid duplicating the type name
// CHECK-FIXES: const auto &b6 = template_const_reference_cast<B>(*a);
B *b7 = template_value_get<B *>("foo");
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a template cast to avoid duplicating the type name
// CHECK-FIXES: auto *b7 = template_value_get<B *>("foo");
B *b8 = template_value_get<B *>("foo"), *b9 = template_value_get<B *>("bar");
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: use auto when initializing with a template cast to avoid duplicating the type name
// CHECK-FIXES: auto *b8 = template_value_get<B *>("foo"), *b9 = template_value_get<B *>("bar");
S s;
const B *b10 = s.template_member_get<B>();
// CHECK-MESSAGES: :[[@LINE-1]]:9: warning: use auto when initializing with a template cast to avoid duplicating the type name
// CHECK-FIXES: const auto *b10 = s.template_member_get<B>();
// Don't warn when auto is already being used.
auto i2 = template_value_cast<int>(d);
auto *i3 = template_value_cast<int *>(d);
auto **i4 = template_value_cast<int **>(d);
auto &i5 = template_reference_cast<int>(d);
// Don't warn for implicit template arguments.
int i6 = max(i1, i2);
// Don't warn for mismatched var and initializer types.
A *a1 = template_value_cast<B *>(a);
// Don't warn for mismatched var types.
B *b11 = template_value_get<B *>("foo"), b12 = template_value_get<B>("bar");
// Don't warn for implicit variables.
for (auto &c : template_reference_cast<StringRef>(*a)) {
}
}
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