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[std] Improve index for 'freestanding/hosted implementation'. #3949

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Sep 18, 2020
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[std] Improve index for 'freestanding/hosted implementation'. #3949

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2 changes: 2 additions & 0 deletions source/atomics.tex
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Expand Up @@ -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
Expand Down Expand Up @@ -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}

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2 changes: 2 additions & 0 deletions source/basic.tex
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Expand Up @@ -5785,6 +5785,7 @@
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.
Expand Down Expand Up @@ -6409,6 +6410,7 @@
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.
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4 changes: 2 additions & 2 deletions source/intro.tex
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Expand Up @@ -470,8 +470,8 @@
\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
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10 changes: 6 additions & 4 deletions source/lib-intro.tex
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Expand Up @@ -1464,19 +1464,19 @@
\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}.

Expand Down Expand Up @@ -1514,6 +1514,7 @@
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
Expand All @@ -1526,6 +1527,7 @@
\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}

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8 changes: 6 additions & 2 deletions source/preprocessor.tex
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Expand Up @@ -1669,9 +1669,13 @@

\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}}%
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