38 releases (5 breaking)
new 0.6.1 | Apr 26, 2024 |
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0.5.3 | Apr 16, 2024 |
0.4.1 | Mar 30, 2024 |
0.1.19 | Dec 17, 2023 |
0.1.16 | Oct 16, 2023 |
#1303 in Procedural macros
1,727 downloads per month
Used in savvy
88KB
2K
SLoC
savvy-macro
Generate R-ready Rust functions by adding #[savvy]
macro.
For the full details, please read savvy's crate documentation.
/// Convert to Upper-case
///
/// @param x A character vector.
/// @export
#[savvy]
fn to_upper(x: StringSexp) -> savvy::Result<savvy::Sexp> {
// Use `Owned{type}Sexp` to allocate an R vector for output.
let mut out = OwnedStringSexp::new(x.len())?;
for (i, e) in x.iter().enumerate() {
// To Rust, missing value is an ordinary value. In `&str`'s case, it's just "NA".
// You have to use `.is_na()` method to distinguish the missing value.
if e.is_na() {
// Set the i-th element to NA
out.set_na(i)?;
continue;
}
let e_upper = e.to_uppercase();
out.set_elt(i, e_upper.as_str())?;
}
out.into()
}
Dependencies
~0.3–0.8MB
~19K SLoC