Add the clang library to the repo (with some of my changes, too).

1 files changed, 209 insertions, 0 deletions

diff --git a/clang/test/CXX/stmt.stmt/stmt.iter/stmt.ranged/p1.cpp b/clang/test/CXX/stmt.stmt/stmt.iter/stmt.ranged/p1.cpp
new file mode 100644
index 0000000..a45b35f
--- /dev/null
+++ b/clang/test/CXX/stmt.stmt/stmt.iter/stmt.ranged/p1.cpp
@@ -0,0 +1,209 @@
+// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
+
+namespace std {
+  template<typename T>
+    auto begin(T &&t) -> decltype(t.begin()) { return t.begin(); } // expected-note 4{{ignored: substitution failure}}
+  template<typename T>
+    auto end(T &&t) -> decltype(t.end()) { return t.end(); } // expected-note {{candidate template ignored: substitution failure [with T = }}
+
+  template<typename T>
+    auto begin(T &&t) -> decltype(t.alt_begin()) { return t.alt_begin(); } // expected-note {{selected 'begin' template [with T = }} \
+                                                                              expected-note 4{{candidate template ignored: substitution failure [with T = }}
+  template<typename T>
+    auto end(T &&t) -> decltype(t.alt_end()) { return t.alt_end(); } // expected-note {{candidate template ignored: substitution failure [with T = }}
+
+  namespace inner {
+    // These should never be considered.
+    int begin(int);
+    int end(int);
+  }
+
+  using namespace inner;
+}
+
+struct A { // expected-note 2 {{candidate constructor}}
+  A();
+  int *begin(); // expected-note 3{{selected 'begin' function with iterator type 'int *'}} expected-note {{'begin' declared here}}
+  int *end();
+};
+
+struct B {
+  B();
+  int *alt_begin();
+  int *alt_end();
+};
+
+void f();
+void f(int);
+
+void g() {
+  for (int a : A())
+    A __begin;
+  for (char *a : A()) { // expected-error {{cannot initialize a variable of type 'char *' with an lvalue of type 'int'}}
+  }
+  for (char *a : B()) { // expected-error {{cannot initialize a variable of type 'char *' with an lvalue of type 'int'}}
+  }
+  // FIXME: Terrible diagnostic here. auto deduction should fail, but does not!
+  for (double a : f) { // expected-error {{cannot use type '<overloaded function type>' as a range}}
+  }
+  for (auto a : A()) {
+  }
+  for (auto a : B()) {
+  }
+  for (auto *a : A()) { // expected-error {{variable 'a' with type 'auto *' has incompatible initializer of type 'int'}}
+  }
+  // : is not a typo for :: here.
+  for (A NS:A()) { // expected-error {{no viable conversion from 'int' to 'A'}}
+  }
+  for (auto not_in_scope : not_in_scope) { // expected-error {{use of undeclared identifier 'not_in_scope'}}
+  }
+
+  for (auto a : A())
+    for (auto b : A()) {
+      __range.begin(); // expected-error {{use of undeclared identifier '__range'}}
+      ++__begin; // expected-error {{use of undeclared identifier '__begin'}}
+      --__end; // expected-error {{use of undeclared identifier '__end'}}
+    }
+
+  for (char c : "test")
+    ;
+  for (auto a : f()) // expected-error {{cannot use type 'void' as a range}}
+    ;
+
+  extern int incomplete[];
+  for (auto a : incomplete) // expected-error {{cannot use incomplete type 'int []' as a range}}
+    ;
+  extern struct Incomplete also_incomplete[2]; // expected-note {{forward declaration}}
+  for (auto &a : also_incomplete) // expected-error {{cannot use incomplete type 'struct Incomplete [2]' as a range}}
+    ;
+
+  struct VoidBegin {
+    void begin(); // expected-note {{selected 'begin' function with iterator type 'void'}}
+    void end();
+  };
+  for (auto a : VoidBegin()) // expected-error {{cannot use type 'void' as an iterator}}
+    ;
+
+  struct null_t {
+    operator int*();
+  };
+  struct Differ {
+    int *begin(); // expected-note {{selected 'begin' function with iterator type 'int *'}}
+    null_t end(); // expected-note {{selected 'end' function with iterator type 'null_t'}}
+  };
+  for (auto a : Differ()) // expected-error {{'begin' and 'end' must return the same type (got 'int *' and 'null_t')}}
+    ;
+
+  for (void f() : "error") // expected-error {{for range declaration must declare a variable}}
+    ;
+
+  for (extern int a : A()) {} // expected-error {{loop variable 'a' may not be declared 'extern'}}
+  for (static int a : A()) {} // expected-error {{loop variable 'a' may not be declared 'static'}}
+  for (register int a : A()) {} // expected-error {{loop variable 'a' may not be declared 'register'}}
+  for (constexpr int a : A()) {} // expected-error {{loop variable 'a' may not be declared 'constexpr'}}
+
+  struct NoBeginADL {
+    null_t alt_end();
+  };
+  struct NoEndADL {
+    null_t alt_begin();
+  };
+  for (auto u : NoBeginADL()) { // expected-error {{no matching function for call to 'begin'}} expected-note {{range has type 'NoBeginADL'}}
+  }
+  for (auto u : NoEndADL()) { // expected-error {{no matching function for call to 'end'}} expected-note {{range has type 'NoEndADL'}}
+  }
+
+  struct NoBegin {
+    null_t end();
+  };
+  struct NoEnd {
+    null_t begin();
+  };
+  for (auto u : NoBegin()) { // expected-error {{range type 'NoBegin' has 'end' member but no 'begin' member}}
+  }
+  for (auto u : NoEnd()) { // expected-error {{range type 'NoEnd' has 'begin' member but no 'end' member}}
+  }
+
+  struct NoIncr {
+    void *begin(); // expected-note {{selected 'begin' function with iterator type 'void *'}}
+    void *end();
+  };
+  for (auto u : NoIncr()) { // expected-error {{arithmetic on a pointer to void}}
+  }
+
+  struct NoNotEq {
+    NoNotEq begin(); // expected-note {{selected 'begin' function with iterator type 'NoNotEq'}}
+    NoNotEq end();
+    void operator++();
+  };
+  for (auto u : NoNotEq()) { // expected-error {{invalid operands to binary expression}}
+  }
+
+  struct NoCopy {
+    NoCopy();
+    NoCopy(const NoCopy &) = delete;
+    int *begin();
+    int *end();
+  };
+  for (int n : NoCopy()) { // ok
+  }
+
+  for (int n : 42) { // expected-error {{no matching function for call to 'begin'}} \
+                        expected-note {{range has type 'int'}}
+  }
+
+  for (auto a : *also_incomplete) { // expected-error {{cannot use incomplete type 'struct Incomplete' as a range}}
+  }
+}
+
+template<typename T, typename U>
+void h(T t) {
+  for (U u : t) { // expected-error {{no viable conversion from 'A' to 'int'}}
+  }
+  for (auto u : t) {
+  }
+}
+
+template void h<A, int>(A);
+template void h<A(&)[4], A &>(A(&)[4]);
+template void h<A(&)[13], A>(A(&)[13]);
+template void h<A(&)[13], int>(A(&)[13]); // expected-note {{requested here}}
+
+template<typename T>
+void i(T t) {
+  for (auto u : t) { // expected-error {{no matching function for call to 'begin'}} \
+                        expected-error {{member function 'begin' not viable}} \
+                        expected-note {{range has type}}
+  }
+}
+template void i<A[13]>(A*); // expected-note {{requested here}}
+template void i<const A>(const A); // expected-note {{requested here}}
+
+namespace NS {
+  class ADL {};
+  int *begin(ADL); // expected-note {{no known conversion from 'NS::NoADL' to 'NS::ADL'}}
+  int *end(ADL);
+
+  class NoADL {};
+}
+int *begin(NS::NoADL);
+int *end(NS::NoADL);
+
+struct VoidBeginADL {};
+void begin(VoidBeginADL); // expected-note {{selected 'begin' function with iterator type 'void'}}
+void end(VoidBeginADL);
+
+void j() {
+  for (auto u : NS::ADL()) {
+  }
+  for (auto u : NS::NoADL()) { // expected-error {{no matching function for call to 'begin'}} expected-note {{range has type}}
+  }
+  for (auto a : VoidBeginADL()) { // expected-error {{cannot use type 'void' as an iterator}}
+  }
+}
+
+void example() {
+  int array[5] = { 1, 2, 3, 4, 5 };
+  for (int &x : array)
+    x *= 2;
+}