[basic.pre][basic.link] Names have linkage

An essential property of names is that they have linkage.
Move the statement that names have linkage up from [basic.link]
to [basic.pre] where the term `name` is defined, and before
the references to linkage of names in the clauses between
[basic.pre] and [basic.link].

Author: AlisdairM

source/basic.tex

@@ -36,6 +36,12 @@
 \grammarterm{conversion-function-id}\iref{class.conv.fct},
 \grammarterm{operator-function-id}\iref{over.oper}, or
 \grammarterm{literal-operator-id}\iref{over.literal}.
+A name can have
+\defnadj{external}{linkage},
+\defnadj{module}{linkage},
+\defnadj{internal}{linkage}, or
+\defnadj{no}{linkage},
+as determined by the rules in \ref{basic.link}.
 
 \pnum
 Two names are \defnx{the same}{name!same} if
@@ -157,6 +163,12 @@
 refer to the same entity in these translation units depending on the
 linkage\iref{basic.link} of the name specified in each
 translation unit.
+\begin{note}
+All declarations of an entity with a name with internal linkage
+appear in the same translation unit.
+All declarations of an entity with module linkage
+are attached to the same module.
+\end{note}
 
 \rSec1[basic.def]{Declarations and definitions}
 
@@ -2875,6 +2887,7 @@
 
 \pnum
 \indextext{program}%
+\indextext{translation unit}%
 \indextext{linking}%
 A \defn{program} consists of one or more translation units\iref{lex.separate}
 linked together. A translation unit consists
@@ -2886,21 +2899,6 @@
     \opt{global-module-fragment} module-declaration \opt{declaration-seq} \opt{private-module-fragment}
 \end{bnf}
 
-\pnum
-\indextext{translation unit}%
-A name can have
-\defnadj{external}{linkage},
-\defnadj{module}{linkage},
-\defnadj{internal}{linkage}, or
-\defnadj{no}{linkage},
-as determined by the rules below.
-\begin{note}
-All declarations of an entity with a name with internal linkage
-appear in the same translation unit.
-All declarations of an entity with module linkage
-are attached to the same module.
-\end{note}
-
 \pnum
 \indextext{linkage!\idxcode{static} and}%
 \indextext{\idxcode{static}!linkage of}%