[std] Improve index for 'freestanding/hosted implementation'.

Author: jensmaurer

source/atomics.tex

@@ -348,6 +348,7 @@
 whose template arguments are integral types, respectively signed and unsigned,
 and whose \tcode{is_always_lock_free} property is \tcode{true}.
 \begin{note}
+\indextext{implementation!freestanding}%
 These aliases are optional in freestanding implementations\iref{compliance}.
 \end{note}
 Implementations should choose for these aliases
@@ -620,6 +621,7 @@
 for the corresponding unsigned type\iref{basic.fundamental},
 is always lock-free.
 \begin{note}
+\indextext{implementation!freestanding}%
 This requirement is optional in freestanding implementations\iref{compliance}.
 \end{note}
 

source/basic.tex

@@ -5792,6 +5792,7 @@
 example, allow executions inconsistent with a simple interleaving, as described
 below.
 \end{note}
+\indextext{implementation!freestanding}%
 Under a freestanding implementation, it is \impldef{number of
 threads in a program under a freestanding implementation} whether a program can
 have more than one thread of execution.
@@ -6416,6 +6417,7 @@
 in which the \tcode{main} function is invoked,
 and in which variables of static storage duration
 might be initialized\iref{basic.start.static} and destroyed\iref{basic.start.term}.
+\indextext{implementation!freestanding}%
 It is \impldef{defining \tcode{main} in freestanding environment}
 whether a program in a freestanding environment is required to define a \tcode{main}
 function.

source/intro.tex

@@ -769,8 +769,8 @@
 \indextext{conformance requirements!library|)}
 
 \pnum
-Two kinds of implementations are defined: a \defn{hosted implementation} and a
-\defn{freestanding implementation}. For a hosted implementation, this
+Two kinds of implementations are defined: a \defnadj{hosted}{implementation} and a
+\defnadj{freestanding}{implementation}. For a hosted implementation, this
 document defines the set of available libraries. A freestanding
 implementation is one in which execution may take place without the benefit of
 an operating system, and has an \impldef{required libraries for freestanding

source/lib-intro.tex

@@ -1170,19 +1170,19 @@
 \end{multicolfloattable}
 
 \rSec3[compliance]{Freestanding implementations}
+\indextext{implementation!freestanding|(}%
 
 \pnum
 Two kinds of implementations are defined:
-\defnx{hosted}{implementation!hosted}
-and
-\defnx{freestanding}{implementation!freestanding}\iref{intro.compliance};
+\indextext{implementation!hosted}%
+hosted and freestanding\iref{intro.compliance};
 the kind of the implementation is
 \impldef{whether the implementation is hosted or freestanding}.
 For a hosted implementation, this document
 describes the set of available headers.
 
 \pnum
-A freestanding implementation\indextext{implementation!freestanding} has an
+A freestanding implementation has an
 \impldef{headers for freestanding implementation} set of headers. This set shall
 include at least the headers shown in \tref{headers.cpp.fs}.
 
@@ -1220,6 +1220,7 @@
 and
 \indexlibraryglobal{quick_exit}%
 \tcode{quick_exit}\iref{support.start.term}.
+\indextext{implementation!hosted}%
 The supplied version of the header \libheaderrefx{atomic}{atomics.syn}
 shall meet the same requirements as for a hosted implementation
 except that support for
@@ -1232,6 +1233,7 @@
 \tcode{atomic_unsigned_lock_free} in freestanding environments}.
 The other headers listed in this table
 shall meet the same requirements as for a hosted implementation.
+\indextext{implementation!freestanding|)}%
 
 \rSec2[using]{Using the library}
 

source/preprocessor.tex

@@ -1671,9 +1671,13 @@
 
 \item
 \indextext{__stdc_hosted__@\mname{STDC_HOSTED}}%
+\indextext{implementation!hosted}%
+\indextext{implementation!freestanding}%
 \mname{STDC_HOSTED}\\
-The integer literal \tcode{1} if the implementation is a hosted
-implementation or the integer literal \tcode{0} if it is not.
+The integer literal \tcode{1}
+if the implementation is a hosted implementation or
+the integer literal \tcode{0}
+if it is a freestanding implementation\iref{intro.compliance}.
 
 \item
 \indextext{__stdcpp_default_new_alignment__@\mname{STDCPP_DEFAULT_NEW_ALIGNMENT}}%