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| author | Bernd Edlinger <bernd.edlinger@hotmail.de> | 2016-09-19 22:10:11 +0000 |
|---|---|---|
| committer | Bernd Edlinger <edlinger@gcc.gnu.org> | 2016-09-19 22:10:11 +0000 |
| commit | 144a96e4c914710cacdb95d33f4e03dc9fed7655 (patch) | |
| tree | e93888863720e72051a26271bdd350b2c7f07917 /gcc/doc | |
| parent | 3385d437fe1e17b7ba4735b5b6869e2153bfb506 (diff) | |
| download | gcc-144a96e4c914710cacdb95d33f4e03dc9fed7655.zip gcc-144a96e4c914710cacdb95d33f4e03dc9fed7655.tar.gz gcc-144a96e4c914710cacdb95d33f4e03dc9fed7655.tar.bz2 | |
re PR c++/77434 (warn about suspicious precedence of ternary operator (?:))
gcc:
2016-09-19 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR c++/77434
* doc/invoke.texi: Document -Wint-in-bool-context.
c-family:
2016-09-19 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR c++/77434
* c.opt (Wcond-in-bool-context): New warning.
* c-common.c (c_common_truthvalue_conversion): Warn on integer
constants in boolean context.
cp:
2016-09-19 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR c++/77434
* cvt.c (cp_convert_and_check): Suppress Wint-in-bool-context here.
testsuite:
2016-09-19 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR c++/77434
* c-c++-common/Wint-in-bool-context.c: New test.
From-SVN: r240251
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 8eb5eff..3c27283 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -273,7 +273,7 @@ Objective-C and Objective-C++ Dialects}. -Wframe-larger-than=@var{len} -Wno-free-nonheap-object -Wjump-misses-init @gol -Wignored-qualifiers -Wignored-attributes -Wincompatible-pointer-types @gol -Wimplicit -Wimplicit-function-declaration -Wimplicit-int @gol --Winit-self -Winline -Wno-int-conversion @gol +-Winit-self -Winline -Wno-int-conversion -Wint-in-bool-context @gol -Wno-int-to-pointer-cast -Winvalid-memory-model -Wno-invalid-offsetof @gol -Winvalid-pch -Wlarger-than=@var{len} @gol -Wlogical-op -Wlogical-not-parentheses -Wlong-long @gol @@ -3660,6 +3660,7 @@ Options} and @ref{Objective-C and Objective-C++ Dialect Options}. -Wduplicate-decl-specifier @r{(C and Objective-C only)} @gol -Wenum-compare @r{(in C/ObjC; this is on by default in C++)} @gol -Wformat @gol +-Wint-in-bool-context @gol -Wimplicit @r{(C and Objective-C only)} @gol -Wimplicit-int @r{(C and Objective-C only)} @gol -Wimplicit-function-declaration @r{(C and Objective-C only)} @gol @@ -5837,6 +5838,14 @@ warning about it. The restrictions on @code{offsetof} may be relaxed in a future version of the C++ standard. +@item -Wint-in-bool-context +@opindex Wint-in-bool-context +@opindex Wno-int-in-bool-context +Warn for suspicious use of integer values where boolean values are expected, +such as conditional expressions (?:) using non-boolean integer constants in +boolean context, like @code{if (a <= b ? 2 : 3)}. +This warning is enabled by @option{-Wall}. + @item -Wno-int-to-pointer-cast @opindex Wno-int-to-pointer-cast @opindex Wint-to-pointer-cast |