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use crate::{Engine, EvalAltResult, Identifier, Module, ModuleResolver, Position, Shared};
#[cfg(feature = "no_std")]
use std::prelude::v1::*;
use std::{collections::BTreeMap, ops::AddAssign};
#[derive(Debug, Clone, Default)]
pub struct StaticModuleResolver(BTreeMap<Identifier, Shared<Module>>);
impl StaticModuleResolver {
#[inline(always)]
pub fn new() -> Self {
Default::default()
}
#[inline(always)]
pub fn insert(&mut self, path: impl Into<Identifier>, mut module: Module) {
module.build_index();
self.0.insert(path.into(), module.into());
}
#[inline(always)]
pub fn remove(&mut self, path: &str) -> Option<Shared<Module>> {
self.0.remove(path)
}
#[inline(always)]
pub fn contains_path(&self, path: &str) -> bool {
self.0.contains_key(path)
}
#[inline(always)]
pub fn iter(&self) -> impl Iterator<Item = (&str, &Shared<Module>)> {
self.0.iter().map(|(k, v)| (k.as_str(), v))
}
#[inline(always)]
pub fn iter_mut(&mut self) -> impl Iterator<Item = (&str, &mut Shared<Module>)> {
self.0.iter_mut().map(|(k, v)| (k.as_str(), v))
}
#[inline(always)]
pub fn into_iter(self) -> impl Iterator<Item = (Identifier, Shared<Module>)> {
self.0.into_iter()
}
#[inline(always)]
pub fn paths(&self) -> impl Iterator<Item = &str> {
self.0.keys().map(|s| s.as_str())
}
#[inline(always)]
pub fn values(&self) -> impl Iterator<Item = &Shared<Module>> {
self.0.values().map(|m| m)
}
#[inline(always)]
pub fn clear(&mut self) {
self.0.clear();
}
#[inline(always)]
pub fn is_empty(&self) -> bool {
self.0.is_empty()
}
#[inline(always)]
pub fn len(&self) -> usize {
self.0.len()
}
#[inline(always)]
pub fn merge(&mut self, other: Self) {
if !other.is_empty() {
self.0.extend(other.0.into_iter());
}
}
}
impl ModuleResolver for StaticModuleResolver {
#[inline(always)]
fn resolve(
&self,
_: &Engine,
_: Option<&str>,
path: &str,
pos: Position,
) -> Result<Shared<Module>, Box<EvalAltResult>> {
self.0
.get(path)
.cloned()
.ok_or_else(|| EvalAltResult::ErrorModuleNotFound(path.into(), pos).into())
}
}
impl AddAssign<Self> for StaticModuleResolver {
#[inline(always)]
fn add_assign(&mut self, rhs: Self) {
self.merge(rhs);
}
}