Add meta predicates for reference binding (#175)

Add semantic meta operators for type-testing of temporary binding and temporary conversion to references, respectively for `std::reference_constructs_from_temporary` and `std::reference_converts_from_temporary`.

Author: GabrielDosReis

ltx/exprs.tex

@@ -2272,6 +2272,8 @@ \subsection{Dyadic operators}
 	\enumerator{ClearStorage}
 	\enumerator{Select}
 	\enumerator{Address}
+	\enumerator{BindTemporaryToReference}
+	\enumerator{ConvertTemporaryToReference}
 
 	\setcounter{enumi}{1023}
 	\enumerator{Msvc}
@@ -2564,6 +2566,15 @@ \subsection{Dyadic operators}
 	a \sortref{Select}{DyadicOperator} syntactic tree (especially in template code), this specific operator is used only 
 	when the scope is known to be a class-type and the member is known to be a non-static data member or a non-static member function.}
 
+\ifcSortSection{BindTemporaryToReference}{DyadicOperator}
+A meta-operator the operands of which are type expressions.  Let's $U$ and $V$ be the types designated by the first and second operands, respectively.
+The value of this predicate on $U$ and $V$ is the same as that of \code{std::reference_constructs_from_temporary_v<}$U$\code{, }$V$\code{>}.
+
+\ifcSortSection{ConvertTemporaryToReference}{DyadicOperator}
+A meta-operator the operands of which are type expressions.  Let's $U$ and $V$ be the types designated by the first and second operands, respectively.
+The value of this predicate on $U$ and $V$ is the same as that of \code{std::reference_convert_from_temporary_v<}$U$\code{, }$V$\code{>}.
+
+
 \ifcSortSection{Msvc}{DyadicOperator}
 This is a marker, not an actual operator. Dyadic operators with 
 value greater that this are MSVC extensions.

ltx/words.tex

@@ -687,6 +687,8 @@ \subsubsection{\valueTag{WordSort::Keyword}}
 	\enumerator{Volatile}
 	\enumerator{WcharT}
 	\enumerator{While}
+	\enumerator{BindTemporaryToReference}
+	\enumerator{ConvertTemporaryToReference}
 \end{Enumeration}
 and those with values greater than $0x1FFF$
 \begin{Enumeration}{SourceKeyword}\setcounter{enumi}{8190}
@@ -890,6 +892,8 @@ \subsubsection{\valueTag{WordSort::Keyword}}
 \ifcdoc{Volatile}{SourceKeyword} A reserved word for ``\code{volatile}''.
 \ifcdoc{WcharT}{SourceKeyword} A reserved word for ``\code{wchar_t}''.
 \ifcdoc{While}{SourceKeyword} A reserved word for ``\code{while}''.
+\ifdoc{BindTemporaryToReference} A reserved word for ``\code{__reference_constructs_from_temporary}''.
+\ifcdoc{ConvertTemporaryToReference} A reserved word for ``\code{__reference_converts_from_temporary}''.
 
 
 \ifcdoc{Msvc}{SourceKeyword}  No reserved word of this value shall be produced.  All MSVC-specific