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Module tuples

miniextendr_api::from_r

Module tuples 

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Tuple conversions: read an R list (VECSXP) positionally into (A, B, ...).

Inbound counterpart of the IntoR tuple family (crate::into_r, tuple to unnamed list region) — same arities (1 through 12), same VECSXP shape.

Semantics:

  • The input must be a list (VECSXP) of exactly N elements; names are ignored (conversion is positional).
  • Element i converts via <Ti as TryFromSexp>::try_from_sexp.
  • All failing elements are collected into one batched diagnostic (1-based positions, matching R indexing) instead of bailing on the first failure.

Macros§

impl_tuple_try_from_sexp 🔒
Implement TryFromSexp for tuples of various sizes (1-12). Reads an unnamed R list (VECSXP) positionally; mirrors impl_tuple_into_r!.
impl_tuple_vec_try_from_sexp 🔒
Tuple rows keep their own R object/class, as Vec<List> does. Validators therefore run per row; nullable rows skip the validator for NULL.

Functions§

check_list_shape 🔒