carbon-lang

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Richard Smith 0124aae041 Import non-const rvalue references as var parameters. (#7125 )

When importing a C++ function with an rvalue reference parameter, we
previously produced a Carbon value parameter. This would lead to the
toolchain believing it could pass the address of a non-expiring object
to the function, which would lead to a use-after-move.

Instead, we now map non-const rvalue reference parameters to Carbon
`var` parameters. This forces the object passed into C++ to be unique
and owned by the call. While that's not an exact match for C++ rvalue
reference parameters, given that it provides "always move" not
"conditionally move", it's the closest match we have at the moment.

2026-04-29 00:28:00 +00:00

basics

Import non-const rvalue references as var parameters. (#7125 )

2026-04-29 00:28:00 +00:00

class

Import non-const rvalue references as var parameters. (#7125 )

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enum

Import non-const rvalue references as var parameters. (#7125 )

2026-04-29 00:28:00 +00:00

function

Import non-const rvalue references as var parameters. (#7125 )