diff options
Diffstat (limited to 'gcc/doc/cpp.texi')
| -rw-r--r-- | gcc/doc/cpp.texi | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/gcc/doc/cpp.texi b/gcc/doc/cpp.texi index 47ec9cde9d8..319f73510d8 100644 --- a/gcc/doc/cpp.texi +++ b/gcc/doc/cpp.texi @@ -536,15 +536,18 @@ be removed in GCC 3.1. You may use continued lines instead, or string constant concatenation. @xref{Differences from previous versions}. @cindex punctuators +@cindex digraphs +@cindex alternative tokens @dfn{Punctuators} are all the usual bits of punctuation which are meaningful to C and C++. All but three of the punctuation characters in ASCII are C punctuators. The exceptions are @samp{@@}, @samp{$}, and @samp{`}. In addition, all the two- and three-character operators are -punctuators. There are also six @dfn{digraphs}, which are merely -alternate ways to spell other punctuators. This is a second attempt to -work around missing punctuation in obsolete systems. It has no negative -side effects, unlike trigraphs, but does not cover as much ground. The -digraphs and their corresponding normal punctuators are: +punctuators. There are also six @dfn{digraphs}, which the C++ standard +calls @dfn{alternative tokens}, which are merely alternate ways to spell +other punctuators. This is a second attempt to work around missing +punctuation in obsolete systems. It has no negative side effects, +unlike trigraphs, but does not cover as much ground. The digraphs and +their corresponding normal punctuators are: @example Digraph: <% %> <: :> %: %:%: |