std::ios_base::io_state not an integer type

• Key: STDCXX-326
• Type: Bug
• Status: Resolved
• Resolution: Fixed
• Priority: Major
• Assignee: Martin Sebor
• Reporter: Martin Sebor
• Component/s: 27. Input/Output
• Affects Version/s: 4.1.2, 4.1.3
• Fix Version/s: 4.2.0

Description

depr.ios.members, p2 requires that std::ios_base::io_state be an integer type. The program below fails to compile, indicating that in stdcxx it is not:

$ cat t.cpp && make t
#include <ios>

int main ()
{
const int i = 1;
std::ios_base::io_state s = i;
}

eccp -c -I/build/sebor/dev/stdlib/include/ansi -D_RWSTDDEBUG -D_RWSTD_USE_CONFIG -I/build/sebor/dev/stdlib/include -I/build/sebor/eccp-3.8-11s/include -I/build/sebor/dev/stdlib/include/ansi -I/build/sebor/PlumHall/lvs06a/conform -I/build/sebor/PlumHall/lvs06a/dst.3 -A -x --template_directory=/build/sebor/eccp-3.8-11s/lib -g --display_error_number --remarks --diag_suppress 193,236,340,401,261,479,487,678,679,815 --diag_suppress 177,381,191,68,550,611,997,549 t.cpp
"t.cpp", line 6: error #144: a value of type "int" cannot be used to
initialize an entity of type "std::ios_base::io_state"
std::ios_base::io_state s = i;
^

1 error detected in the compilation of "t.cpp".
make: *** [t.o] Error 2

Comments

[Martin Sebor]

The other two deprecated types, open_mode and seek_dir, have the same problem:

$ cat t.cpp && make t
#include <ios>

void foo (std::ios::io_state, std::ios::open_mode, std::ios::seek_dir) { }

int main ()
{
foo (1, 2, 3);
}

eccp -c -I/build/sebor/dev/stdlib/include/ansi -D_RWSTDDEBUG -D_RWSTD_USE_CONFIG -I/build/sebor/dev/stdlib/include -I/build/sebor/eccp-3.8-11s/include -I/build/sebor/dev/stdlib/include/ansi -I/build/sebor/PlumHall/lvs06a/conform -I/build/sebor/PlumHall/lvs06a/dst.3 -A -x --template_directory=/build/sebor/eccp-3.8-11s/lib -g --display_error_number --remarks --diag_suppress 193,236,340,401,261,479,487,678,679,815 --diag_suppress 177,381,191,68,550,611,997,549 t.cpp
"t.cpp", line 7: error #167: argument of type "int" is incompatible with
parameter of type "std::ios_base::io_state"
foo (1, 2, 3);
^

"t.cpp", line 7: error #167: argument of type "int" is incompatible with
parameter of type "std::ios_base::open_mode"
foo (1, 2, 3);
^

"t.cpp", line 7: error #167: argument of type "int" is incompatible with
parameter of type "std::ios_base::seek_dir"
foo (1, 2, 3);
^

3 errors detected in the compilation of "t.cpp".
make: *** [t.o] Error 2

Fixed with the referenced patch. Need to add a test.