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Add linkcheck, fix typos and expand.

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Stephen Chung
2020-06-20 22:56:56 +08:00
parent ffe0c559be
commit 6121aaec9d
17 changed files with 285 additions and 81 deletions
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doc/src/rust/packages.md
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@@ -8,6 +8,12 @@ Standard built-in Rhai features are provided in various _packages_ that can be l
Packages reside under `rhai::packages::*` and the trait `rhai::packages::Package` must be loaded in order for
packages to be used.
Packages typically contain Rust functions that are callable within a Rhai script.
All functions registered in a package is loaded under the _global namespace_ (i.e. they're available without module qualifiers).
Once a package is created (e.g. via `new`), it can be _shared_ (via `get`) among multiple instances of [`Engine`],
even across threads (under [`sync`]). Therefore, a package only has to be created _once_.
```rust
use rhai::Engine;
use rhai::packages::Package // load the 'Package' trait to use packages
@@ -19,34 +25,14 @@ let package = CorePackage::new(); // create a package - can be shared among mu
engine.load_package(package.get()); // load the package manually. 'get' returns a reference to the shared package
```
The follow packages are available:
| Package | Description | In `Core` | In `Standard` |
| ---------------------- | ------------------------------------------------------------------------------------------------------ | :-------: | :-----------: |
| `ArithmeticPackage` | Arithmetic operators (e.g. `+`, `-`, `*`, `/`) for numeric types that are not built in (e.g. `u16`) | Yes | Yes |
| `BasicIteratorPackage` | Numeric ranges (e.g. `range(1, 10)`) | Yes | Yes |
| `LogicPackage` | Logical and comparison operators (e.g. `==`, `>`) for numeric types that are not built in (e.g. `u16`) | Yes | Yes |
| `BasicStringPackage` | Basic string functions (e.g. `print`, `debug`, `len`) that are not built in | Yes | Yes |
| `BasicTimePackage` | Basic time functions (e.g. [timestamps]) | Yes | Yes |
| `MoreStringPackage` | Additional string functions, including converting common types to string | No | Yes |
| `BasicMathPackage` | Basic math functions (e.g. `sin`, `sqrt`) | No | Yes |
| `BasicArrayPackage` | Basic [array] functions (not available under `no_index`) | No | Yes |
| `BasicMapPackage` | Basic [object map] functions (not available under `no_object`) | No | Yes |
| `EvalPackage` | Disable [`eval`] | No | No |
| `CorePackage` | Basic essentials | Yes | Yes |
| `StandardPackage` | Standard library (default for `Engine::new`) | No | Yes |
Packages typically contain Rust functions that are callable within a Rhai script.
All functions registered in a package is loaded under the _global namespace_ (i.e. they're available without module qualifiers).
Once a package is created (e.g. via `new`), it can be _shared_ (via `get`) among multiple instances of [`Engine`],
even across threads (under [`sync`]). Therefore, a package only has to be created _once_.
Difference Between a Package and a Module
----------------------------------------
Packages are actually implemented as [modules], so they share a lot of behavior and characteristics.
The main difference is that a package loads under the _global_ namespace, while a module loads under its own
namespace alias specified in an [`import`] statement (see also [modules]).
A package is _static_ (i.e. pre-loaded into an [`Engine`]), while a module is _dynamic_ (i.e. loaded with
the `import` statement).
Custom packages can also be created. See the macro [`def_package!`](https://docs.rs/rhai/0.13.0/rhai/macro.def_package.html).