diff options
Diffstat (limited to 'gcc/ada/doc')
| -rw-r--r-- | gcc/ada/doc/gnat_rm/implementation_advice.rst | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/gcc/ada/doc/gnat_rm/implementation_advice.rst b/gcc/ada/doc/gnat_rm/implementation_advice.rst index b006f32..31376d9 100644 --- a/gcc/ada/doc/gnat_rm/implementation_advice.rst +++ b/gcc/ada/doc/gnat_rm/implementation_advice.rst @@ -703,23 +703,23 @@ Followed. .. index:: Stream oriented attributes -RM 13.13.2(17): Stream Oriented Attributes -========================================== +RM 13.13.2(1.6): Stream Oriented Attributes +=========================================== + + "If not specified, the value of Stream_Size for an elementary type + should be the number of bits that corresponds to the minimum number of + stream elements required by the first subtype of the type, rounded up + to the nearest factor or multiple of the word size that is also a + multiple of the stream element size." - "If a stream element is the same size as a storage element, then the - normal in-memory representation should be used by ``Read`` and - ``Write`` for scalar objects. Otherwise, ``Read`` and ``Write`` - should use the smallest number of stream elements needed to represent - all values in the base range of the scalar type." +Followed, except that the number of stream elements is a power of 2. +The Stream_Size may be used to override the default choice. -Followed. By default, GNAT uses the interpretation suggested by AI-195, -which specifies using the size of the first subtype. However, such an implementation is based on direct binary -representations and is therefore target- and endianness-dependent. -To address this issue, GNAT also supplies an alternate implementation -of the stream attributes ``Read`` and ``Write``, -which uses the target-independent XDR standard representation -for scalar types. +representations and is therefore target- and endianness-dependent. To +address this issue, GNAT also supplies an alternate implementation of +the stream attributes ``Read`` and ``Write``, which uses the +target-independent XDR standard representation for scalar types. .. index:: XDR representation |