diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/doc/extend.texi | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index 76fb210..d2bf604 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -12944,6 +12944,7 @@ C and/or C++ standards, while others remain specific to GNU C. * Offsetof:: Special syntax for @code{offsetof}. * Alignment:: Determining the alignment of a function, type or variable. * Enum Extensions:: Forward declarations and specifying the underlying type. +* Boolean Type:: Support for the @code{_Bool} keyword. * Variadic Macros:: Macros with a variable number of arguments. * Conditionals:: Omitting the middle operand of a @samp{?:} expression. * Case Ranges:: `case 1 ... 9' and such. @@ -13698,6 +13699,17 @@ Forward-declaring an incomplete enum type without an explicit underlying type is supported as an extension in all GNU C dialects, but is not supported at all in GNU C++. +@node Boolean Type +@subsection Support for the @code{_Bool} Type +@cindex boolean type +@cindex @code{_Bool} keyword + +The C99 standard added @code{_Bool} as a C language keyword naming the +boolean type. As an extension, GNU C also recognizes @code{_Bool} in +C90 mode as well as with @option{-std=c99} and later. + +GNU C++ does not support the @code{_Bool} keyword. + @node Variadic Macros @subsection Macros with a Variable Number of Arguments. @cindex variable number of arguments |