27.basic_ios.copyfmt.stdcxx-1058.cpp

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/*
 * This program should run to completion and exit with return status 0
 */
 
#include <ios>
#include <stdio.h>
#include <stdlib.h>
 
#define TEST_ASSERT(expr) \
    (expr) ? ret = 0 \
    : fprintf(stderr,"file %s line %i: Assertion failed: %s\n", \
    __FILE__, __LINE__, #expr); fflush(stderr); if (ret != 0) abort()
 
int x;
 
void testfun (std::ios_base::event ev, std::ios_base& iosobj, int index)
{
    x = index;
 
    switch (ev)
    {
        case std::ios_base::copyfmt_event:
            (void) fprintf(stderr, "copyfmt_event\n"); break;
        case std::ios_base::imbue_event:
            (void) fprintf(stderr, "imbue_event\n"); break;
        case std::ios_base::erase_event:
            (void) fprintf(stderr, "erase_event\n"); break;
        default:
            (void) fprintf(stderr, "unknown (this should never happen)\n"); break;
    }
}
 
 
int main ()
{
    struct A: std::streambuf { };
 
    struct B: std::ios {
        A sb;
        B () { init (&sb); }
    } f0, f1;
 
    int i = 101;
    int ret = 1;
 
    std::ios_base::event_callback e1 = &testfun;
    f0.register_callback (e1, i);
 
    x = 0;
    f0.imbue (f0.getloc());
    TEST_ASSERT (x == i);
 
    x = 0;
    ret = 1;
    f0.copyfmt (f1);
    TEST_ASSERT (x == i);
 
    B s0, s1;
 
    s0.register_callback (e1, i);
 
    x = 0;
    ret = 1;
    s0.imbue (f0.getloc ());
    TEST_ASSERT (x == i);
 
    x = 0;
    ret = 1;
    s0.copyfmt (s1);
    TEST_ASSERT (x == i);
 
    return ret;
}