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P0608R3 A sane variant converting constructor #2465

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Nov 26, 2018
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P0608R3 A sane variant converting constructor #2465

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15 changes: 12 additions & 3 deletions source/utilities.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -3984,7 +3984,12 @@
\begin{itemdescr}
\pnum
Let $\tcode{T}_j$ be a type that is determined as follows:
build an imaginary function \tcode{\placeholdernc{FUN}($\tcode{T}_i$)} for each alternative type $\tcode{T}_i$. The overload \tcode{\placeholdernc{FUN}($\tcode{T}_j$)} selected by overload
build an imaginary function \tcode{\placeholdernc{FUN}($\tcode{T}_i$)}
for each alternative type $\tcode{T}_i$
for which \tcode{$\tcode{T}_i$ x[] =} \tcode{\{std::forward<T>(t)\};}
is well-formed for some invented variable \tcode{x} and,
if $\tcode{T}_i$ is \cv~\tcode{bool}, \tcode{remove_cvref_t<T>} is \tcode{bool}.
The overload \tcode{\placeholdernc{FUN}($\tcode{T}_j$)} selected by overload
resolution for the expression \tcode{\placeholdernc{FUN}(std::forward<T>(\brk{}t))} defines
the alternative $\tcode{T}_j$ which is the type of the contained value after
construction.
Expand Down Expand Up @@ -4288,8 +4293,12 @@
\begin{itemdescr}
\pnum
Let $\tcode{T}_j$ be a type that is determined as follows:
build an imaginary function \tcode{\placeholdernc{FUN}($\tcode{T}_i$)} for each alternative type
$\tcode{T}_i$. The overload \tcode{\placeholdernc{FUN}($\tcode{T}_j$)} selected by overload
build an imaginary function \tcode{\placeholdernc{FUN}($\tcode{T}_i$)}
for each alternative type $\tcode{T}_i$
for which \tcode{$\tcode{T}_i$ x[] =} \tcode{\{std::forward<T>(t)\};}
is well-formed for some invented variable \tcode{x} and,
if $\tcode{T}_i$ is \cv~\tcode{bool}, \tcode{remove_cvref_t<T>} is \tcode{bool}.
The overload \tcode{\placeholdernc{FUN}($\tcode{T}_j$)} selected by overload
resolution for the expression \tcode{\placeholdernc{FUN}(std::forward<T>(\brk{}t))} defines
the alternative $\tcode{T}_j$ which is the type of the contained value after
assignment.
Expand Down