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Changelog

Unreleased (ReleaseDate)

v0.6.4 (2024-05-25)

New features

  • New function r_warn() safely show a warning. Note that, a warning can raise error when options(warn = 2), so you should not ignore the error from r_warn(). The error should be propagated to the R session.

  • Savvy now translates Option<T> as an optional argument, i.e., an argument with the default value of NULL.

    Example:

    #[savvy]
fn default_value_vec(x: Option<IntegerSexp>) -> savvy::Result<Sexp> {
    if let Some(x) = x {
        x.iter().sum::<i32>().try_into()
    } else {
        (-1).try_into()
    }
}
    default_value_vec(1:10)
#> [1] 55

default_value_vec()
#> [1] -1

Bug fixes

  • r_print!() and r_eprint!() now can print strings containing %.

Breaking Change

  • The notation for savvy-cli test is now changed to #[cfg(feature = "savvy-test")] from #[cfg(savvy_test)]. This is to avoid the upcoming change in Cargo (ref).

v0.6.3 (2024-05-05)

New features

  • New types NumericSexp and NumericScalar are added to handle both integer and double. You can get a slice via as_slice_*() or an iterator via iter_*().

    #[savvy]
fn times_two(x: NumericSexp) -> savvy::Result<Sexp> {
    let mut out = OwnedIntegerSexp::new(x.len())?;

    for (i, v) in x.iter_i32().enumerate() {
        let v = v?; // The item of iter_i32() is Result because the conversion can fail.
        if v.is_na() {
            out[i] = i32::na();
        } else {
            out[i] = v * 2;
        }
    }

    out.into()
}

    You can also use .into_typed() to handle integer and double differently.

    #[savvy]
fn times_two(x: NumericSexp) -> savvy::Result<savvy::Sexp> {
    match x.into_typed() {
        NumericTypedSexp::Integer(i) => times_two_int(i),
        NumericTypedSexp::Real(r) => times_two_real(r),
    }
}

  • Savvy now provides r_stdout() and r_stderr() to be used with interfaces that require std::io::Write. Also, you can use savvy::log::env_logger() to output logs to R's stderr. Here's an example usage:

    use savvy::savvy_init;
use savvy_ffi::DllInfo;

#[savvy_init]
fn init_logger(dll_info: *mut DllInfo) -> savvy::Result<()> {
    savvy::log::env_logger().init();
    Ok(())
}

Breaking changes

  • AltList now loses names argument in into_altrep() for consistency. Please use set_names() on the resulted Sexp object.

    let mut out = v.into_altrep()?;
out.set_names(["one", "two"])?;
Ok(out)

v0.6.2 (2024-05-04)

New features

  • New macro #[savvy_init] makes the function executed when the DLL is loaded by R. This is useful for initializaing resources. See the guide for more details.

    Example:

    use std::sync::OnceLock;

static GLOBAL_FOO: OnceLock<Foo> = OnceLock::new();

#[savvy_init]
fn init_global_foo(dll_info: *mut DllInfo) -> savvy::Result<()> {
    GLOBAL_FOO.get_or_init(|| Foo::new());

    Ok(())
}

  • Savvy now experimentally supports ALTREP. See the guide for more details.

    Example:

    struct MyAltInt(Vec<i32>);

impl MyAltInt {
    fn new(x: Vec<i32>) -> Self {
        Self(x)
    }
}

impl savvy::IntoExtPtrSexp for MyAltInt {}

impl AltInteger for MyAltInt {
    const CLASS_NAME: &'static str = "MyAltInt";
    const PACKAGE_NAME: &'static str = "TestPackage";

    fn length(&mut self) -> usize {
        self.0.len()
    }

    fn elt(&mut self, i: usize) -> i32 {
        self.0[i]
    }
}

v0.6.1 (2024-04-26)

Minor improvements

  • Now savvy no longer uses SETLENGTH, which is a so-called "non-API" thing.

v0.6.0 (2024-04-20)

Breaking changes

  • savvy-cli test now parses test modules marked with #[cfg(savvy_test)] instead of #[cfg(test)]. The purpose of this change is to let cargo test run for the tests unrelated to a real R sessions.

  • Savvy now generates different names of Rust functions and C functions; previously, the original function name is used for the FFI functions, but now it's savvy_{original}_ffi. This change shouldn't affect ordinary users.

    This change was necessary to let #[savvy] preserve the original function so that we can write unit tests on the function easily. One modification is that the function is made public. For more details, please read the Testing section in the guide.

  • The generated R wrapper file is now named as 000-wrappers.R instead of wrappers.R. This makes the file is loaded first so that you can override some of the R functions (e.g., a print() method for an enum) in another R file. The old wrapper file wrappers.R is automatically deleted by savvy-cli update

New features

  • Added a function eval_parse_text(), which is an equivalent to R's idiom eval(parse(text = )). This is mainly for testing purposes.

  • Added a function is_r_identical(), which is an equivalent to R's identical(). This is mainly for testing purposes.

  • Added a function assert_eq_r_code() if the first argument has the same data as the result of the R code of the second argument.

    Example:

    let mut x = savvy::OwnedRealSexp::new(3)?;
x[1] = 1.0;
x[2] = 2.0;
assert_eq_r_code(x, "c(0.0, 1.0, 2.0)");

  • savvy-cli test now picks [dev-dependencies] from the crate's Cargo.toml as the dependencies to be used for testing.

  • savvy-cli test got --features argument to add features to be used for testing.

v0.5.3 (2024-04-16)

New features

  • Savvy now catches crash not only on the debug build, but also on the release build if panic = "unwind". Instead, now savvy-cli init generates a Cargo.toml with a release profile of panic = "abort". You need to modify this setting if you really want to catch panics on the release build.

  • savvy-cli update now ensures .Rbuildignore contains ^src/rust/.cargo$ and ^src/rust/target$.

  • savvy-cli test now uses OS's cache dir instead of the .savvy directory.

Fixed bugs

  • Now savvy-cli test works for other crates than savvy.

v0.5.2 (2024-04-14)

New features

  • Now savvy's debug build (when DEBUG envvar is set to true, i.e., devtools::load_all()), panic doesn't crash R session and shows bactrace. This is useful for investigating what's the cause of the panic.

    Please keep in mind that, in Rust, panic is an unrecoverable error. So, not crashing doesn't mean you are saved.

  • savvy-cli test no longer relies on the savvy R package.

Fixed bugs

  • Fixed a bug in try_from_iter() when the actual length is different than the size reported by size_hint().

  • savvy-cli test now uses the local crate as the path dependency, instead of using the savvy crate fixedly.

v0.5.1 (2024-04-13)

New features

  • An experimental new subcommand savvy-cli test runs tests by extracting and wrapping the test code with a temporary R package. This is because savvy always requires a real R session, which means cargo test doesn't work. Note that this relies on the savvy R package. Please install it before trying this.

    install.packages("savvy", repos = c("https://yutannihilation.r-universe.dev", "https://cloud.r-project.org"))

  • savvy-cli init now generates Makevars that supports debug build when DEBUG envvar is set to true (i.e., in devtools::load_all()).

v0.5.0 (2024-04-05)

Breaking changes

  • To support enum properly (the details follow), now savvy requires to put #[savvy] macro also on struct.

    #[savvy]   // NEW!
struct Person {
    pub name: String,
}

#[savvy]
impl Person {

    This might be a bit inconvenient on the one hand, but, on the other hand, several good things are introduced by this change! See the New Features section.

New features

  • Now #[savvy] macro supports enum to express the possible options for a parameter. This is useful when you want to let users specify some option without fear of typo. See the guide for more details.

    Example:

    /// @export
#[savvy]
enum LineType {
    Solid,
    Dashed,
    Dotted,
}

/// @export
#[savvy]
fn plot_line(x: IntegerSexp, y: IntegerSexp, line_type: &LineType) -> savvy::Result<()> {
    match line_type {
        LineType::Solid => {
            ...
        },
        LineType::Dashed => {
            ...
        },
        LineType::Dotted => {
            ...
        },
    }
}
    plot_line(x, y, LineType$Solid)

  • Savvy now allows impl definition over multiple files. It had been a headache that it wouldn't compile when you specified #[savvy] on impl of a same struct multiple times. But now, you can split the impl not only within a same file but also over multiple files.

  • OwnedListSexp and ListSexp gains unchecked_*() variants of the set and get methods for a fast but unsafe operation. Thanks @daniellga!

v0.4.2 (2024-04-01)

New features

  • OwnedIntegerSexp and etc now have try_from_iter() method for constructing a new instance from an iterator.

    Example:

    #[savvy]
fn filter_integer_odd(x: IntegerSexp) -> savvy::Result<Sexp> {
    // is_na() is to propagate NAs
    let iter = x.iter().copied().filter(|i| i.is_na() || *i % 2 == 0);
    let out = OwnedIntegerSexp::try_from_iter(iter)?;
    out.into()
}

  • OwnedIntegerSexp and etc now have try_from_slice() method for constructing a new instance from a slice or vec. This conversion is and has been possible via try_from(), but this method was added for discoverability.

  • OwnedIntegerSexp and etc now have try_from_scalar() method for constructing a new instance from a scalar value (e.g. i32). This conversion is and has been possible via try_from(), but this method was added for discoverability.

  • savvy-cli update and savvy-cli init now tries to parse the Rust files actually declared by mod keyword.

v0.4.1 (2024-03-30)

Breaking changes

  • Sexp loses is_environment() method becuase this isn't useful, considering savvy doesn't support environment.

New features

  • get_dim() and set_dim() are now available also on Sexp.

  • Now savvy allows to consume the value behind an external pointer. i.e., T instead of &T or &mut T as the argument. After getting consumed, the pointer is null, so any function call on the already-consumed R object results in an error. See the guide for more details.

    Example:

    struct Value {};
struct Wrapper { inner: Value }

#[savvy]
impl Value {
  fn new() -> Self {
    Self {}
  }
}

#[savvy]
impl Wrapper {
  fn new(value: Value) -> Self {
    Self { inner: value }
  }
}
    v <- Value$new()
w <- Wrapper$new(v)  # value is consumed here.

w <- Wrapper$new(v)
#> Error: This external pointer is already consumed or deleted

  • Sexp now has assert_integer() etc to verify the type of the underlying SEXP is as expected.

v0.4.0 (2024-03-27)

Breaking changes

  • #[savvy] on a struct's impl now generates the same name of R object that holds all the accociated functions. For example, previously the below code generates a constructor Person(), but now the constructor is available as Person$new().

    struct Person {
    pub name: String,
}

/// @export
#[savvy]
impl Person {
    fn new() -> Self {
        Self {
            name: "".to_string(),
        }
    }
}

New features

  • A struct marked with #[savvy] can be used as the return type of the associated function. In conjunction with the change in v0.3.0, now a user-defined struct can be used more flexibly than before. Please refer to the "Struct" section of the guide
  • An experimental support on complex is added under compex feature flag. ComplexSexp and OwnedComplexSexp are the corresponding Rust types.
  • OwnedIntegerSexp and etc now have set_na(i) method for shorthand of set_elt(i, T::na()). This is particularly useful for OwnedLogicalSexp because its setter interface set_elt() only accepts bool and no missing values.

Fixed bugs

  • An expert-only method new_without_init() now skips initialization as intended.

v0.3.0 (2024-03-24)

New features

  • Now user-defined struct can be used as an argument of #[savvy]-ed functions. It must be specified as &Ty or &mut Ty, not Ty.

    Example:

    struct Person {
    pub name: String,
}

#[savvy]
impl Person {
    fn get_name(&self) -> savvy::Result<savvy::Sexp> {
        let name = self.name.as_str();
        name.try_into()
    }
}

#[savvy]
fn get_name_external(x: &Person) -> savvy::Result<savvy::Sexp> {
    x.get_name()
}

Fixed bugs

  • Previously, savvy-cli init and savvy-cli update didn't handle the package name properly ("packageName" vs "package_name"). Now it's fixed.

Breaking changes

  • While this is described in the New features section, it was already allowed to specify user-defined structs as argument if the user defines the necessary TryFrom implementations propoerly. At that time, specifying it without & was possible, but now it's not allowed. Anyway, as this was undocumented and expert-only usage, I expect no one notices this breaking change.

v0.2.20 (2024-03-23)

v0.2.19 (2024-03-23)

New features

  • LogicalSexp and OwnedLogicalSexp now have as_slice_raw() method. This is an expert-only function which might be found useful when you really need to distinguish NAs.

Minor improvements

  • savvy-cli init now generates <dllname>-win.def to avoid the infamous "export ordinal too large" error on Windows.

v0.2.18 (2024-03-11)

Minor improvements

  • The version requirement is a bit more strict now.

v0.2.17 (2024-03-10)

Breaking changes

  • get_dim() now returns &[i32] instead of Vec<usize> to avoid allocation. If the matrix library requires usize, you need to convert the i32 to usize by yourself now. Accordingly, set_dim() now accepts both &[i32] and &[usize].

v0.2.16 (2024-03-03)

Breaking changes

  • fake-libR feature is withdrawn. Instead, Windows users can add this build configuration to avoid the linker error: 
    [target.x86_64-pc-windows-msvc]
rustflags = ["-C", "link-arg=/FORCE:UNRESOLVED"]

v0.2.15 (2024-03-02)

New features

  • Previously, if a crate uses savvy, cargo test fails to compile on Windows even if the test code doesn't use the savvy API at all. This is because the symbols from Rinternals.h needs to be resolved. You can add savvy with fake-libR feature in dev-dependencies to avoid this issue.

Fixed bugs

  • Reject invalid external pointers so that the R session doesn't crash.

v0.2.14 (2024-02-14)

Fixed bugs

  • savvy-cli update and savvy-cli init now correctly overwrite the existing files.

v0.2.13 (2024-02-14)

Fixed bugs

  • The savvy-cli crate now requires Rust >= 1.74 because this is clap's MSRV.

v0.2.12 (2024-02-14)

New features

  • savvy-cli init now adds SystemRequirements to the DESCRIPTION file.

Fixed bugs

  • savvy-cli now works if it's invoked outside of the R package directory.
  • savvy-cli init now generates the build configuration with a workaround for the case of the gnu toolchain on Windows.

v0.2.11 (2024-02-04)

v0.2.10 (2024-02-04)

Fixed bugs

  • Fix the wrong implementation of to_vec().

v0.2.9 (2024-01-27)

Breaking changes

  • Function.call() now uses FunctionArgs to represent function arguments. This is necessary change in order to protect function arguments from GC-ed unexpectedly. The previous interface requires users to pass Sexp, which is unprotected.
  • Function.call() now doesn't require the environment to be executed because it rarely matters. Accordingly, Environment is removed from the API.

v0.2.8 (2024-01-26)

Breaking changes

  • savvy-cli init now produces Makevars.in and configure instead of Makevars in order to support WebR transparently. One limitation on Windows is that configure cannot be set executable; you have to run the following command by yourself.

    git update-index --add --chmod=+x ./configure

New features

  • Add an experimental support for function and environment.

v0.2.7 (2024-01-25)

New features

  • (Experimentally) support WebR by not using R_UnwindProtect().

v0.2.6 (2024-01-20)

Fixed bugs

  • Fix misuses of Rf_mkCharLenCE() which caused compilation error on ARM64 Linux.

v0.2.5 (2024-01-20)

Breaking changes

  • ListSexp now returns an Sexp instead of a TypedSexp. Use .into_typed() to convert an Sexp to a TypedSexp.

New features

  • Add is_null().
  • Add as_read_only() to OwnedListSexp as well.
  • Add cast_unchecked() and cast_mut_unchecked() for casting an external pointer to a concrete type. Note that this is only needed for "external" external pointers.

v0.2.4 (2024-01-15)

v0.2.2 (2024-01-15)

Breaking changes

  • r_print! and r_eprint! are now macro that wraps format!, so you can use them just like Rust's print! macro. There are also r_println! and r_eprintln! available.

New features

  • Support scalar usize input.
  • Add methods to access and modify attributes:
    • get_attrib() / set_attrib()
    • get_names() / set_names()
    • get_class() / set_class()
    • get_dim() / set_dim()
  • A struct marked with #[savvy] now has try_from() for Sexp.

Fixed bugs

  • Newly-created R vectors (Owned*Sexp) are now properly initialized. If you really want to skip the initialization for some great reason, you can use new_without_init() instead of new().
  • #[savvy] now accepts savvy::Sexp as input.