rhai/src/plugin.rs
2021-03-03 22:49:29 +08:00

42 lines
1.5 KiB
Rust

//! Module defining macros for developing _plugins_.
pub use crate::fn_native::{CallableFunction, FnCallArgs};
pub use crate::stdlib::{any::TypeId, boxed::Box, format, mem, string::ToString, vec as new_vec};
use crate::RhaiResult;
pub use crate::{
Dynamic, Engine, EvalAltResult, FnAccess, FnNamespace, ImmutableString, Module,
NativeCallContext, Position, RegisterFn, RegisterResultFn,
};
#[cfg(not(features = "no_module"))]
pub use rhai_codegen::*;
#[cfg(features = "no_module")]
pub use rhai_codegen::{export_fn, register_exported_fn};
/// Trait implemented by a _plugin function_.
///
/// This trait should not be used directly.
/// Use the `#[export_module]` and `#[export_fn]` procedural attributes instead.
pub trait PluginFunction {
/// Call the plugin function with the arguments provided.
fn call(&self, context: NativeCallContext, args: &mut FnCallArgs) -> RhaiResult;
/// Is this plugin function a method?
fn is_method_call(&self) -> bool;
/// Is this plugin function variadic?
fn is_variadic(&self) -> bool;
/// Convert a plugin function into a boxed trait object.
fn clone_boxed(&self) -> Box<dyn PluginFunction>;
/// Return a boxed slice of the names of the function's parameters.
fn input_names(&self) -> Box<[&'static str]>;
/// Return a boxed slice of type ID's of the function's parameters.
fn input_types(&self) -> Box<[TypeId]>;
/// Return a string slice of the function's return type.
fn return_type(&self) -> &'static str;
}