[stdlib] Enable Span<~Escapable>#89213
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Support for non-Escapable Span elements. UnsafePointer-based APIs are not supported.
…anges" This reverts commit 79cdbb4.
We can only use the new version of the @_preInverseGenerics attribute when gated behind a feature check. This includes the RawSpan methods that take a Span<~E> parameter.
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atrick
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May 19, 2026
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Thank you! This is great! Sorry it had to be such a horrible conditionalized mess. I am curious why we need an experimental feature flag for PreInverseGenericsExcept instead of a normal language feature that only requires a new enough compiler
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Allows
Spanof~Escapabletypes, dependent on the newPreInverseGenericsExceptfeature flag to maintain ABI stability.