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re PR c++/65801 (Allow -Wno-narrowing to silence stricter C++11 narrowing rules)

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/cp
2015-04-20  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/65801
	* typeck2.c (check_narrowing): In C++11 mode too, -Wno-narrowing
	suppresses the diagnostic.

2015-04-20  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/65801
	* doc/invoke.texi ([-Wnarrowing]): Update.

/testsuite
2015-04-20  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/65801
	* g++.dg/cpp0x/Wnarrowing2.C: New.

From-SVN: r222249
This commit is contained in:
Paolo Carlini 2015-04-20 21:46:59 +00:00 committed by Paolo Carlini
parent 0cfabb3780
commit 2821fc6b76
6 changed files with 32 additions and 7 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2015-04-20 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/65801
* doc/invoke.texi ([-Wnarrowing]): Update.
2015-04-20 Jeff Law <law@redhat.com>
PR tree-optimization/65658

6
gcc/cp/ChangeLog
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@ -1,3 +1,9 @@
2015-04-20 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/65801
* typeck2.c (check_narrowing): In C++11 mode too, -Wno-narrowing
suppresses the diagnostic.
2015-04-20 Ville Voutilainen <ville.voutilainen@gmail.com>
Reject trailing return type for an operator auto().

10
gcc/cp/typeck2.c
View File

@ -957,9 +957,13 @@ check_narrowing (tree type, tree init, tsubst_flags_t complain)
}
}
else if (complain & tf_error)
error_at (EXPR_LOC_OR_LOC (init, input_location),
"narrowing conversion of %qE from %qT to %qT inside { }",
init, ftype, type);
{
global_dc->pedantic_errors = 1;
pedwarn (EXPR_LOC_OR_LOC (init, input_location), OPT_Wnarrowing,
"narrowing conversion of %qE from %qT to %qT inside { }",
init, ftype, type);
global_dc->pedantic_errors = flag_pedantic_errors;
}
}
return cxx_dialect == cxx98 || ok;

8
gcc/doc/invoke.texi
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@ -2706,10 +2706,10 @@ int i = @{ 2.2 @}; // error: narrowing from double to int
This flag is included in @option{-Wall} and @option{-Wc++11-compat}.
With @option{-std=c++11}, @option{-Wno-narrowing} suppresses for
non-constants the diagnostic required by the standard. Note that this
does not affect the meaning of well-formed code; narrowing conversions
are still considered ill-formed in SFINAE context.
With @option{-std=c++11}, @option{-Wno-narrowing} suppresses the diagnostic
required by the standard. Note that this does not affect the meaning
of well-formed code; narrowing conversions are still considered
ill-formed in SFINAE context.
@item -Wnoexcept @r{(C++ and Objective-C++ only)}
@opindex Wnoexcept

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2015-04-20 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/65801
* g++.dg/cpp0x/Wnarrowing2.C: New.
2015-04-20 Jeff Law <law@redhat.com>
PR tree-optimization/65658

5
gcc/testsuite/g++.dg/cpp0x/Wnarrowing2.C Normal file
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@ -0,0 +1,5 @@
// PR c++/65801
// { dg-do compile { target c++11 } }
// { dg-options "-Wno-narrowing" }
static struct zai { unsigned int x; } x = {-1};