Introduce RhaiResult.

src/plugin.rs

@@ -4,7 +4,7 @@ pub use crate::fn_native::{CallableFunction, FnCallArgs};
 pub use crate::stdlib::{any::TypeId, boxed::Box, format, mem, string::ToString, vec as new_vec};
 pub use crate::{
     Dynamic, Engine, EvalAltResult, FnAccess, FnNamespace, ImmutableString, Module,
-    NativeCallContext, Position, RegisterFn, RegisterResultFn,
+    NativeCallContext, Position, RegisterFn, RegisterResultFn, RhaiResult,
 };
 
 #[cfg(not(features = "no_module"))]
@@ -18,11 +18,7 @@ pub use rhai_codegen::{export_fn, register_exported_fn};
 /// 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,
-    ) -> Result<Dynamic, Box<EvalAltResult>>;
+    fn call(&self, context: NativeCallContext, args: &mut FnCallArgs) -> RhaiResult;
 
     /// Is this plugin function a method?
     fn is_method_call(&self) -> bool;