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// { dg-do compile }

// Origin: Giovanni Bajo 

// Try to find out when the digraph '<:' is used as a mistake, and parse it

//  correctly to avoid cascaded errors.

struct B;

template 

struct Foo

{

  template 

  struct Nested

  {

    static void method(void) {}

  };

  void method(void) {

    typename Foo<::B>::template Nested<::B> n; // { dg-error "cannot begin|alternate spelling" }

    n.template Nested::method();

    n.template Nested<::B>::method();  // { dg-error "cannot begin|alternate spelling" }

    Nested::method();

    Nested<::B>::method(); // { dg-error "cannot begin|alternate spelling" }

  }

};

template  struct Foo2 {};

template struct Foo2<::B>;  // { dg-error "cannot begin|alternate spelling|type/value mismatch|expected a constant" }

int value = 0;

void func(void)

{

  Foo<::B> f; // { dg-error "cannot begin|alternate spelling" }

  f.Foo::method();

  f.Foo<::B>::method(); // { dg-error "cannot begin|alternate spelling" }

  // Check cases where we the token sequence is the correct one, but there

  //  was no digraph or whitespaces in the middle, so we should not emit

  //  the special error message.

  Foo<: :B> k2;     // { dg-bogus "cannot begin|alternate spelling" "smart error should not be triggered here" }

  Foo[:B> k1;       // { dg-bogus "cannot begin|alternate spelling" "smart error should not be triggered here" }

// { dg-error "" "" { target *-*-* } 40 }

// { dg-error "" "" { target *-*-* } 41 }

  int Foo[2];

  Foo[::value] = 0;

}

template struct Foo<::B>; // { dg-error "cannot begin|alternate spelling" }

// On the first error message, an additional note about the use of

//  -fpermissive should be present

// { dg-error "-fpermissive" "-fpermissive" { target *-*-* } 18 }