[atomic] Minor corrections to atomic index

The index for the primary atomic template was split across
two entries, atomic and atomic<T>.  Reconciled into one.

A couple of operations for atomic smart pointers are
specificed in the primary template, but were missing the
cross-reference into that specification, which is supplied
in the same way for all the other atomic specializations.

Author: AlisdairM

source/atomics.tex

@@ -1657,6 +1657,8 @@
 \indexlibrarymember{is_always_lock_free}{atomic<T*>}%
 \indexlibrarymember{is_always_lock_free}{atomic<\placeholder{integral}>}%
 \indexlibrarymember{is_always_lock_free}{atomic<\placeholder{floating-point}>}%
+\indexlibrarymember{is_always_lock_free}{atomic<shared_ptr<T>>}%
+\indexlibrarymember{is_always_lock_free}{atomic<weak_ptr<T>>}%
 \begin{itemdecl}
 static constexpr bool is_always_lock_free = @\impdefx{whether a given \tcode{atomic} type's operations are always lock free}@;
 \end{itemdecl}
@@ -1676,6 +1678,8 @@
 \indexlibrarymember{is_lock_free}{atomic<T*>}%
 \indexlibrarymember{is_lock_free}{atomic<\placeholder{integral}>}%
 \indexlibrarymember{is_lock_free}{atomic<\placeholder{floating-point}>}%
+\indexlibrarymember{is_lock_free}{atomic<shared_ptr<T>>}%
+\indexlibrarymember{is_lock_free}{atomic<weak_ptr<T>>}%
 \begin{itemdecl}
 bool is_lock_free() const volatile noexcept;
 bool is_lock_free() const noexcept;
@@ -2036,7 +2040,7 @@
 This function is an atomic waiting operation\iref{atomics.wait}.
 \end{itemdescr}
 
-\indexlibrarymember{notify_one}{atomic<T>}%
+\indexlibrarymember{notify_one}{atomic}%
 \indexlibrarymember{notify_one}{atomic<T*>}%
 \indexlibrarymember{notify_one}{atomic<\placeholder{integral}>}%
 \indexlibrarymember{notify_one}{atomic<\placeholder{floating-point}>}%
@@ -2057,7 +2061,7 @@
 This function is an atomic notifying operation\iref{atomics.wait}.
 \end{itemdescr}
 
-\indexlibrarymember{notify_all}{atomic<T>}%
+\indexlibrarymember{notify_all}{atomic}%
 \indexlibrarymember{notify_all}{atomic<T*>}%
 \indexlibrarymember{notify_all}{atomic<\placeholder{integral}>}%
 \indexlibrarymember{notify_all}{atomic<\placeholder{floating-point}>}%