libreoffice/compilerplugins/clang/test/external.cxx

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

#include <sal/config.h>

#include <vector>

// expected-error@+1 {{externally available entity 'n1' is not previously declared in an included file (if it is only used in this translation unit, make it static or put it in an unnamed namespace; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
int n1 = 0;
// expected-note@+1 {{another declaration is here [loplugin:external]}}
extern int n1;

int const n2 = 0; // no warning, internal linkage

constexpr int n3 = 0; // no warning, internal linkage

struct S1
{
    friend void f1() {} // no warning for injected function (no place where to mark it `static`)
    template <typename> friend void ft1() {} // ...nor for injected function template
    // expected-error@+1 {{externally available entity 'f2' is not previously declared in an included file (if it is only used in this translation unit, make it static; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
    friend void f2() {}
};

struct S2
{
    friend void f1();
    template <typename> friend void ft1();
    // expected-note@+1 {{another declaration is here [loplugin:external]}}
    friend void f2();
};

static void g()
{
    void f1();
    // expected-note@+1 {{another declaration is here [loplugin:external]}}
    void f2();
}

// expected-note@+1 {{another declaration is here [loplugin:external]}}
void f2();

namespace N
{
inline namespace I1
{
extern "C++" {
// expected-note@+1 {{another declaration is here [loplugin:external]}}
enum E : int;

// expected-error@+1 {{externally available entity 'E' is not previously declared in an included file (if it is only used in this translation unit, put it in an unnamed namespace; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
enum E : int
{
};
}
}

// expected-note@+1 {{a function associating 'N::I1::E' is declared here [loplugin:external]}}
static void g(std::vector<E>)
{
    // expected-note@+1 {{another declaration is here [loplugin:external]}}
    void f(E const*);
}

// expected-note@+1 {{a function associating 'N::I1::E' is declared here [loplugin:external]}}
void f(E const*);

extern "C++" {
// expected-note@+1 {{a function associating 'N::I1::E' is declared here [loplugin:external]}}
void fc(E const*);
}

struct S1
{
    struct S2;
    // No note about associating function; injected friend function not found by ADL:
    friend void f2(E const*);
};

inline namespace I2
{
// expected-note@+1 {{a function associating 'N::I1::E' is declared here [loplugin:external]}}
void f3(E);

inline namespace I3
{
// expected-note@+1 {{a function associating 'N::I1::E' is declared here [loplugin:external]}}
void f4(E);
}
}
}

struct N::S1::S2
{
    // expected-note@+1 {{another declaration is here [loplugin:external]}}
    friend void f(E const*);
};

int main()
{
    (void)n2;
    (void)n3;
    g();
    (void)&N::g;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */