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// { dg-do compile }
// { dg-options "-fshow-column" }"
// Origin: Giovanni Bajo <giovannibajo at gcc dot gnu dot org>
// Try to find out when the digraph '<:' is used as a mistake, and parse it
// correctly to avoid cascaded errors.
struct B;
template <class A>
struct Foo
{
template <class T>
struct Nested
{
static void method(void) {}
};
void method(void) {
typename Foo<::B>::template Nested<::B> n; // { dg-error "17:'<::' cannot begin" "17-begin" }
// { dg-message "17:'<:' is an alternate spelling" "17-alt" { target *-*-* } 19 }
// { dg-error "39:'<::' cannot begin" "39-begin" { target *-*-* } 19 }
// { dg-message "39:'<:' is an alternate spelling" "39-alt" { target *-*-* } 19 }
n.template Nested<B>::method();
n.template Nested<::B>::method(); // { dg-error "22:'<::' cannot begin" "error" }
// { dg-message "22:'<:' is an alternate" "note" { target *-*-* } 24 }
Nested<B>::method();
Nested<::B>::method(); // { dg-error "11:'<::' cannot begin" "error" }
// { dg-message "11:'<:' is an alternate" "note" { target *-*-* } 27 }
}
};
template <int N> struct Foo2 {};
template struct Foo2<::B>; // { dg-error "21:'<::' cannot begin" "begin" }
// { dg-message "21:'<:' is an alternate" "alt" { target *-*-* } 33 }
// { dg-message "25:type/value mismatch" "mismatch" { target *-*-* } 33 }
// { dg-error "25:expected a constant" "const" { target *-*-* } 33 }
int value = 0;
void func(void)
{
Foo<::B> f; // { dg-error "cannot begin" "begin" }
// { dg-message "alternate spelling" "alt" { target *-*-* } 42 }
f.Foo<B>::method();
f.Foo<::B>::method(); // { dg-error "8:cannot begin" "begin" }
// { dg-message "8:alternate spelling" "alt" { target *-*-* } 45 }
// 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 "6:missing template arguments before" "template" { target *-*-* } { 51 } }
// { dg-error "9:expected primary-expression before ':' token" "primary" { target *-*-* } 51 }
// { dg-error "9:expected '\]' before ':' token" "backslash" { target *-*-* } 51 }
// { dg-error "9:expected ';' before ':' token" "semicolon" { target *-*-* } 51 }
// { dg-error "6:missing template arguments before" "template" { target *-*-* } 52 }
// { dg-error "7:expected primary-expression before ':' token" "primary" { target *-*-* } 52 }
// { dg-error "7:expected '\]' before ':' token" "backslash" { target *-*-* } 52 }
// { dg-error "7:expected ';' before ':' token" "semicolon" { target *-*-* } 52 }
//
int Foo[2];
Foo[::value] = 0;
}
template struct Foo<::B>; // { dg-error "20:'<::' cannot begin" "begin" }
// { dg-message "20:is an alternate" "alt" { target *-*-* } 66 }
// On the first error message, an additional note about the use of
// -fpermissive should be present
// { dg-message "17:\\(if you use '-fpermissive' G\\+\\+ will accept your code\\)" "-fpermissive" { target *-*-* } 19 }
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