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Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 218eb99..dd3302f 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -414,6 +414,7 @@ Objective-C and Objective-C++ Dialects}. -Wvector-operation-performance @gol -Wvla -Wvla-larger-than=@var{byte-size} -Wno-vla-larger-than @gol -Wvolatile-register-var -Wwrite-strings @gol +-Wxor-used-as-pow @gol -Wzero-length-bounds} @item Static Analyzer Options @@ -9686,6 +9687,20 @@ modifier does not inhibit all optimizations that may eliminate reads and/or writes to register variables. This warning is enabled by @option{-Wall}. +@item -Wxor-used-as-pow @r{(C, C++, Objective-C and Objective-C++ only)} +@opindex Wxor-used-as-pow +@opindex Wno-xor-used-as-pow +Warn about uses of @code{^}, the exclusive or operator, where it appears +the user meant exponentiation. Specifically, the warning occurs when the +left-hand side is the decimal constant 2 or 10 and the right-hand side +is also a decimal constant. + +In C and C++, @code{^} means exclusive or, whereas in some other languages +(e.g. TeX and some versions of BASIC) it means exponentiation. + +This warning is enabled by default. It can be silenced by converting one +of the operands to hexadecimal. + @item -Wdisabled-optimization @opindex Wdisabled-optimization @opindex Wno-disabled-optimization |