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New syntax for package definition.

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This commit is contained in:
Stephen Chung
2022-02-10 12:33:48 +08:00
parent 1c89c6be4f
commit d1a97be9e3
18 changed files with 60 additions and 22 deletions
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48
src/packages/mod.rs
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@@ -67,16 +67,52 @@ pub trait Package {
///
/// fn add(x: i64, y: i64) -> Result<i64, Box<EvalAltResult>> { Ok(x + y) }
///
/// def_package!(rhai:MyPackage:"My super-duper package", module,
/// {
/// // Load a binary function with all value parameters.
/// module.set_native_fn("my_add", add);
/// });
/// def_package! {
/// /// My super-duper package.
/// pub MyPackage(module) {
/// // Load a binary function with all value parameters.
/// module.set_native_fn("my_add", add);
/// }
/// }
/// ```
#[macro_export]
macro_rules! def_package {
($($(#[$outer:meta])* $mod:vis $package:ident($lib:ident) $block:block)+) => { $(
$(#[$outer])*
$mod struct $package($crate::Shared<$crate::Module>);
impl $crate::packages::Package for $package {
fn as_shared_module(&self) -> $crate::Shared<$crate::Module> {
self.0.clone()
}
fn init($lib: &mut $crate::Module) {
$block
}
}
impl Default for $package {
fn default() -> Self {
Self::new()
}
}
impl $package {
pub fn new() -> Self {
let mut module = $crate::Module::new();
<Self as $crate::packages::Package>::init(&mut module);
module.build_index();
Self(module.into())
}
}
)* };
($($(#[$outer:meta])* $root:ident :: $package:ident => | $lib:ident | $block:block)+) => { $(
$(#[$outer])*
/// # Deprecated
///
/// This old syntax of `def_package!` is deprecated. Use the new syntax instead.
///
/// This syntax will be removed in the next major version.
#[deprecated(since = "1.5.0", note = "this is an old syntax of `def_package!` and is deprecated; use the new syntax of `def_package!` instead")]
pub struct $package($root::Shared<$root::Module>);
impl $root::packages::Package for $package {
@@ -104,7 +140,6 @@ macro_rules! def_package {
}
)* };
($root:ident : $package:ident : $comment:expr , $lib:ident , $block:stmt) => {
#[deprecated(since = "1.4.0", note = "this is an old syntax of `def_package!` and is deprecated; use the new syntax of `def_package!` instead")]
#[doc=$comment]
///
/// # Deprecated
@@ -112,6 +147,7 @@ macro_rules! def_package {
/// This old syntax of `def_package!` is deprecated. Use the new syntax instead.
///
/// This syntax will be removed in the next major version.
#[deprecated(since = "1.4.0", note = "this is an old syntax of `def_package!` and is deprecated; use the new syntax of `def_package!` instead")]
pub struct $package($root::Shared<$root::Module>);
impl $root::packages::Package for $package {