81 lines
2.2 KiB
Rust
81 lines
2.2 KiB
Rust
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use crate::engine::Engine;
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use crate::module::{Module, ModuleResolver};
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use crate::result::EvalAltResult;
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use crate::token::Position;
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use crate::stdlib::{boxed::Box, vec::Vec};
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/// Module resolution service that holds a collection of module resolves,
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/// to be searched in sequential order.
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///
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/// # Examples
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///
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/// ```
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/// use rhai::{Engine, Module};
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/// use rhai::module_resolvers::{StaticModuleResolver, ModuleResolversCollection};
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///
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/// let mut collection = ModuleResolversCollection::new();
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///
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/// let resolver = StaticModuleResolver::new();
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/// collection.push(resolver);
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///
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/// let mut engine = Engine::new();
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/// engine.set_module_resolver(Some(collection));
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/// ```
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#[derive(Default)]
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pub struct ModuleResolversCollection(Vec<Box<dyn ModuleResolver>>);
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impl ModuleResolversCollection {
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/// Create a new `ModuleResolversCollection`.
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///
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/// # Examples
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///
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/// ```
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/// use rhai::{Engine, Module};
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/// use rhai::module_resolvers::{StaticModuleResolver, ModuleResolversCollection};
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///
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/// let mut collection = ModuleResolversCollection::new();
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///
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/// let resolver = StaticModuleResolver::new();
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/// collection.push(resolver);
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///
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/// let mut engine = Engine::new();
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/// engine.set_module_resolver(Some(collection));
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/// ```
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pub fn new() -> Self {
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Default::default()
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}
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}
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impl ModuleResolversCollection {
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/// Add a module keyed by its path.
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pub fn push(&mut self, resolver: impl ModuleResolver + 'static) {
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self.0.push(Box::new(resolver));
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}
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/// Get an iterator of all the module resolvers.
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pub fn iter(&self) -> impl Iterator<Item = &dyn ModuleResolver> {
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self.0.iter().map(|v| v.as_ref())
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}
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/// Remove all module resolvers.
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pub fn clear(&mut self) {
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self.0.clear();
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}
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}
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impl ModuleResolver for ModuleResolversCollection {
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fn resolve(
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&self,
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engine: &Engine,
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path: &str,
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pos: Position,
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) -> Result<Module, Box<EvalAltResult>> {
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for resolver in self.0.iter() {
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if let Ok(module) = resolver.resolve(engine, path, pos) {
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return Ok(module);
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}
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}
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EvalAltResult::ErrorModuleNotFound(path.into(), pos).into()
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}
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}
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