Module altrep_impl 

ALTREP implementation utilities.

This module provides helper functions for implementing ALTREP classes. The proc-macro uses these to generate trait implementations.

Use crate::altrep_data1_as (re-exported from externalptr) to extract data from an ALTREP’s data1 slot.

Macros

altrep_array_no_na 🔒

no_na fragment for families that support it (Integer, Real).

impl_altrep_array_numeric 🔒

Generate all ALTREP trait impls + InferBase for a numeric [T; N] array family. Pass optional extra items via extra { ... } to include in the family trait impl.

impl_register_altrep_builtin 🔒

Helper macro to implement RegisterAltrep for a builtin type.

Functions

altrep_region_buf^⚠

Create a mutable slice from an ALTREP get_region output buffer pointer.

checked_mkchar^⚠

Create a CHARSXP from a Rust string, with checked length conversion.

register_builtin_altrep_classes 🔒

Eagerly register all built-in ALTREP classes.