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| author | Jonathan Wakely <jwakely@redhat.com> | 2018-09-04 11:27:14 +0100 |
|---|---|---|
| committer | Jonathan Wakely <redi@gcc.gnu.org> | 2018-09-04 11:27:14 +0100 |
| commit | 727c8c82e14021cad992443bb32693293a55e33d (patch) | |
| tree | 356146940c0dc890338ca92e17852763172a871b /gcc | |
| parent | 3ff89a4effe920a31230120f3dfe730472f30558 (diff) | |
| download | gcc-727c8c82e14021cad992443bb32693293a55e33d.zip gcc-727c8c82e14021cad992443bb32693293a55e33d.tar.gz gcc-727c8c82e14021cad992443bb32693293a55e33d.tar.bz2 | |
Update C Extensions docs for support in latest C++
* doc/extend.texi (Long Long, Hex Floats): Document support for
long long and hex floats in more recent versions of ISO C++.
From-SVN: r264076
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/doc/extend.texi | 10 |
2 files changed, 10 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 62e32c6..3b1981c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2018-09-04 Jonathan Wakely <jwakely@redhat.com> + + * doc/extend.texi (Long Long, Hex Floats): Document support for + long long and hex floats in more recent versions of ISO C++. + 2018-09-03 Richard Biener <rguenther@suse.de> PR tree-optimization/87177 diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index 9c3cfdb..4b606c0 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -843,8 +843,8 @@ for targets with @code{long long} integer less than 128 bits wide. @cindex @code{LL} integer suffix @cindex @code{ULL} integer suffix -ISO C99 supports data types for integers that are at least 64 bits wide, -and as an extension GCC supports them in C90 mode and in C++. +ISO C99 and ISO C++11 support data types for integers that are at least +64 bits wide, and as an extension GCC supports them in C90 and C++98 modes. Simply write @code{long long int} for a signed integer, or @code{unsigned long long int} for an unsigned integer. To make an integer constant of type @code{long long int}, add the suffix @samp{LL} @@ -1121,11 +1121,11 @@ are supported by the DWARF debug information format. @section Hex Floats @cindex hex floats -ISO C99 supports floating-point numbers written not only in the usual -decimal notation, such as @code{1.55e1}, but also numbers such as +ISO C99 and ISO C++17 support floating-point numbers written not only in +the usual decimal notation, such as @code{1.55e1}, but also numbers such as @code{0x1.fp3} written in hexadecimal format. As a GNU extension, GCC supports this in C90 mode (except in some cases when strictly -conforming) and in C++. In that format the +conforming) and in C++98, C++11 and C++14 modes. In that format the @samp{0x} hex introducer and the @samp{p} or @samp{P} exponent field are mandatory. The exponent is a decimal number that indicates the power of 2 by which the significant part is multiplied. Thus @samp{0x1.f} is |