[expr]/12 optional conversion

[brevzin]

The wording currently reads:

If the expression is a prvalue after this optional conversion, the temporary materialization conversion is applied.

"this optional conversion" refers to the lvalue-to-rvalue conversion. Optional isn't a good word here, since the conversion itself is mandatory - just only conditionally applied. Maybe "If this conversion is applied and the resulting expression is a prvalue, the temporary materialization conversion is applied"? Or something along those lines.

[timsong-cpp]

The proposed rewording is incorrect. Materialization applies to all discarded prvalues, whether the prvalue is because the expression started off as a prvalue or because the lvalue-to-rvalue conversion was applied by the previous sentence to a volatile-qualified glvalue.

[brevzin]

"If the expression was a prvalue, or becomes a prvalue after applying the lvalue-to-rvalue conversion, the temporary materialization conversion is applied." ? "The temporary materialization conversion is applied if, after applying the lvalue-to-rvalue conversion if necessary, the expression is a prvalue."? "after conditionally applying the lvalue-to-rvalue conversion"?