preserves_path/
context.rs

1use preserves::value::IOValue;
2
3use preserves_schema::compiler::load_schema_or_bundle;
4use preserves_schema::gen::schema::Definition;
5
6use std::io;
7
8#[derive(Default)]
9pub struct Env(pub preserves_schema::support::interpret::Env<IOValue>);
10
11pub struct Context<'a> {
12    pub env: &'a Env,
13    path: Vec<IOValue>,
14}
15
16impl<'a> Context<'a> {
17    pub fn new(env: &'a Env) -> Self {
18        Context {
19            env,
20            path: Vec::new(),
21        }
22    }
23
24    pub fn with_path_step<R, F: FnOnce(&mut Self) -> R>(&mut self, v: &IOValue, f: F) -> R {
25        self.path.push(v.clone());
26        let result = f(self);
27        self.path.pop();
28        result
29    }
30}
31
32impl Env {
33    pub fn new() -> Self {
34        Default::default()
35    }
36
37    pub fn load_bundle(&mut self, filename: &std::path::PathBuf) -> io::Result<bool> {
38        load_schema_or_bundle(&mut self.0, filename)
39    }
40
41    pub fn lookup_definition(
42        &self,
43        module: &Vec<String>,
44        name: &str,
45    ) -> Option<&Definition<IOValue>> {
46        self.0.get(module).and_then(|s| s.definitions.0.get(name))
47    }
48
49    pub fn to_context(&self) -> Context {
50        Context::new(self)
51    }
52}
preserves_path/context.rs

preserves_path/
context.rs
