Remove Builtin.borrowAt usage from the standard library#89669
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This builtin cannot be used inside inlinable functions without a feature guard. It is needed for ~Escapable elements. Guarding the uses with a feature flag will, however, be quite cumbersome. Let's hope that by the time we need ~E elements, the oldest relevant toolchain has support for this builtin. Fixes rdar://178659021 (condfail: error: module 'Builtin' has no member named 'borrowAt')
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Jun 3, 2026
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This builtin cannot be used inside inlinable functions without a feature
guard. It is needed for ~Escapable elements. Guarding the uses with a feature
flag will, however, be quite cumbersome. Let's hope that by the time we need ~E
elements, the oldest relevant toolchain has support for this builtin.
Fixes rdar://178659021 (condfail: error: module 'Builtin' has no member named
'borrowAt')