1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
use crate::ivt::Node;
use crate::util::ValidateError;
use std::collections::BTreeMap;
pub type RulesByName = BTreeMap<String, Node>;
type LookupResult<'a> = Result<&'a Node, ValidateError>;
pub trait Context {
fn lookup_rule<'a>(&'a self, name: &str) -> LookupResult<'a>;
}
#[allow(missing_docs)]
pub struct BasicContext {
pub rules: RulesByName,
}
impl BasicContext {
pub fn new(rules: RulesByName) -> BasicContext {
BasicContext { rules }
}
}
impl Context for BasicContext {
fn lookup_rule<'a>(&'a self, name: &str) -> LookupResult<'a> {
match self.rules.get(name) {
Some(node) => Ok(node),
None => Err(ValidateError::MissingRule(name.into())),
}
}
}
#[doc(hidden)]
#[allow(missing_docs)]
pub mod tests {
use super::{Context, LookupResult, ValidateError};
pub struct DummyContext {}
impl DummyContext {
#![allow(clippy::new_without_default)]
pub fn new() -> DummyContext {
DummyContext {}
}
}
impl Context for DummyContext {
fn lookup_rule<'a>(&'a self, name: &str) -> LookupResult<'a> {
Err(ValidateError::MissingRule(name.into()))
}
}
}