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P0655R1 visit<R>: Explicit Return Type for visit #2457

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Merged
merged 1 commit into from
Nov 26, 2018
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P0655R1 visit<R>: Explicit Return Type for visit #2457

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14 changes: 12 additions & 2 deletions source/utilities.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -3775,6 +3775,8 @@
// \ref{variant.visit}, visitation
template<class Visitor, class... Variants>
constexpr @\seebelow@ visit(Visitor&&, Variants&&...);
template <class R, class Visitor, class... Variants>
constexpr R visit(Visitor&&, Variants&&...);

// \ref{variant.monostate}, class \tcode{monostate}
struct monostate;
Expand Down Expand Up @@ -4862,6 +4864,8 @@
\begin{itemdecl}
template<class Visitor, class... Variants>
constexpr @\seebelow@ visit(Visitor&& vis, Variants&&... vars);
template <class R, class Visitor, class... Variants>
constexpr R visit(Visitor&& vis, Variants&&... vars);
\end{itemdecl}

\begin{itemdescr}
Expand All @@ -4874,6 +4878,11 @@
\begin{codeblock}
@\placeholder{INVOKE}@(std::forward<Visitor>(vis), get<m>(std::forward<Variants>(vars))...) // see \ref{func.require}
\end{codeblock}
for the first form and
\begin{codeblock}
@\placeholder{INVOKE}@<R>(std::forward<Visitor>(vis), get<m>(std::forward<Variants>(vars))...) // see \ref{func.require}
\end{codeblock}
for the second form.

\pnum
\requires
Expand All @@ -4883,8 +4892,9 @@

\pnum
\returns $e(\tcode{m})$, where \tcode{m} is the pack for which
$\tcode{m}_i$ is \tcode{vars$_i$.index()} for
all $0 \leq i < n$. The return type is $\tcode{decltype(}e(\tcode{m})\tcode{)}$.
$\tcode{m}_i$ is \tcode{vars$_i$.index()} for all $0 \leq i < n$.
The return type is $\tcode{decltype(}e(\tcode{m})\tcode{)}$
for the first form.

\pnum
\throws
Expand Down