1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
6 for (int& it : x) { // expected-error {{invalid range expression of type 'int'; no viable 'begin' function available}}
17 auto begin(T &&t) -> decltype(t.begin()) { return t.begin(); } // expected-note 2{{ignored: substitution failure}}
19 auto end(T &&t) -> decltype(t.end()) { return t.end(); } // expected-note {{candidate template ignored: substitution failure [with T = }}
22 auto begin(T &&t) -> decltype(t.alt_begin()) { return t.alt_begin(); } // expected-note {{selected 'begin' template [with T = }} \
23 expected-note 2{{candidate template ignored: substitution failure [with T = }}
25 auto end(T &&t) -> decltype(t.alt_end()) { return t.alt_end(); } // expected-note {{candidate template ignored: substitution failure [with T = }}
28 // These should never be considered.
33 using namespace inner;
35 struct A { // expected-note 2 {{candidate constructor}}
37 int *begin(); // expected-note 3{{selected 'begin' function with iterator type 'int *'}} expected-note {{'begin' declared here}}
63 for (char *a : A()) { // expected-error {{cannot initialize a variable of type 'char *' with an lvalue of type 'int'}}
65 for (char *a : X::B()) { // expected-error {{cannot initialize a variable of type 'char *' with an lvalue of type 'int'}}
67 // FIXME: Terrible diagnostic here. auto deduction should fail, but does not!
68 for (double a : f) { // expected-error {{cannot use type '<overloaded function type>' as a range}}
72 for (auto a : X::B()) {
74 for (auto *a : A()) { // expected-error {{variable 'a' with type 'auto *' has incompatible initializer of type 'int'}}
76 // : is not a typo for :: here.
77 for (A NS:A()) { // expected-error {{no viable conversion from 'int' to 'X::A'}}
79 for (auto not_in_scope : not_in_scope) { // expected-error {{use of undeclared identifier 'not_in_scope'}}
84 __range.begin(); // expected-error {{use of undeclared identifier '__range'}}
85 ++__begin; // expected-error {{use of undeclared identifier '__begin'}}
86 --__end; // expected-error {{use of undeclared identifier '__end'}}
91 for (auto a : f()) // expected-error {{cannot use type 'void' as a range}}
94 extern int incomplete[];
95 for (auto a : incomplete) // expected-error {{cannot use incomplete type 'int []' as a range}}
97 extern struct Incomplete also_incomplete[2]; // expected-note {{forward declaration}}
98 for (auto &a : also_incomplete) // expected-error {{cannot use incomplete type 'struct Incomplete [2]' as a range}}
102 void begin(); // expected-note {{selected 'begin' function with iterator type 'void'}}
105 for (auto a : VoidBegin()) // expected-error {{cannot use type 'void' as an iterator}}
109 int *begin(); // expected-note {{selected 'begin' function with iterator type 'int *'}}
110 null_t end(); // expected-note {{selected 'end' function with iterator type 'null_t'}}
112 for (auto a : Differ()) // expected-error {{'begin' and 'end' must return the same type (got 'int *' and 'null_t')}}
115 for (void f() : "error") // expected-error {{for range declaration must declare a variable}}
118 for (extern int a : A()) {} // expected-error {{loop variable 'a' may not be declared 'extern'}}
119 for (static int a : A()) {} // expected-error {{loop variable 'a' may not be declared 'static'}}
120 for (register int a : A()) {} // expected-error {{loop variable 'a' may not be declared 'register'}}
121 for (constexpr int a : A()) {} // expected-error {{loop variable 'a' may not be declared 'constexpr'}}
123 for (auto u : X::NoBeginADL()) { // expected-error {{invalid range expression of type 'X::NoBeginADL'; no viable 'begin' function available}}
125 for (auto u : X::NoEndADL()) { // expected-error {{invalid range expression of type 'X::NoEndADL'; no viable 'end' function available}}
134 for (auto u : NoBegin()) { // expected-error {{range type 'NoBegin' has 'end' member but no 'begin' member}}
136 for (auto u : NoEnd()) { // expected-error {{range type 'NoEnd' has 'begin' member but no 'end' member}}
140 void *begin(); // expected-note {{selected 'begin' function with iterator type 'void *'}}
143 for (auto u : NoIncr()) { // expected-error {{arithmetic on a pointer to void}}\
144 expected-note {{in implicit call to 'operator++' for iterator of type 'NoIncr'}}
148 NoNotEq begin(); // expected-note {{selected 'begin' function with iterator type 'NoNotEq'}}
152 for (auto u : NoNotEq()) { // expected-error {{invalid operands to binary expression}}\
153 expected-note {{in implicit call to 'operator!=' for iterator of type 'NoNotEq'}}
157 NoDeref begin(); // expected-note {{selected 'begin' function}}
160 bool operator!=(NoDeref &);
163 for (auto u : NoDeref()) { // expected-error {{indirection requires pointer operand}} \
164 expected-note {{in implicit call to 'operator*' for iterator of type 'NoDeref'}}
169 NoCopy(const NoCopy &) = delete;
173 for (int n : NoCopy()) { // ok
176 for (int n : 42) { // expected-error {{invalid range expression of type 'int'; no viable 'begin' function available}}
179 for (auto a : *also_incomplete) { // expected-error {{cannot use incomplete type 'struct Incomplete' as a range}}
183 template<typename T, typename U>
185 for (U u : t) { // expected-error {{no viable conversion from 'X::A' to 'int'}}
191 template void h<A, int>(A);
192 template void h<A(&)[4], A &>(A(&)[4]);
193 template void h<A(&)[13], A>(A(&)[13]);
194 template void h<A(&)[13], int>(A(&)[13]); // expected-note {{requested here}}
198 for (auto u : t) { // expected-error {{invalid range expression of type 'X::A *'; no viable 'begin' function available}} \
199 expected-error {{member function 'begin' not viable}} \
200 expected-note {{when looking up 'begin' function}}
204 template void i<A[13]>(A*); // expected-note {{requested here}}
205 template void i<const A>(const A); // expected-note {{requested here}}
207 struct StdBeginEnd {};
209 int *begin(StdBeginEnd);
210 int *end(StdBeginEnd);
213 for (auto a : StdBeginEnd()) {} // expected-error {{invalid range expression of type 'StdBeginEnd'; no viable 'begin'}}
218 int *begin(ADL); // expected-note {{no known conversion from 'NS::NoADL' to 'NS::ADL'}}
223 int *begin(NS::NoADL);
226 struct VoidBeginADL {};
227 void begin(VoidBeginADL); // expected-note {{selected 'begin' function with iterator type 'void'}}
228 void end(VoidBeginADL);
231 for (auto u : NS::ADL()) {
233 for (auto u : NS::NoADL()) { // expected-error {{invalid range expression of type 'NS::NoADL'; no viable 'begin' function available}}
235 for (auto a : VoidBeginADL()) { // expected-error {{cannot use type 'void' as an iterator}}
241 int array[5] = { 1, 2, 3, 4, 5 };