alloy_sol_type_parser/
input.rs

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1#![allow(missing_docs, missing_copy_implementations, missing_debug_implementations)]
2
3// Recursion implementation modified from `toml`: https://github.com/toml-rs/toml/blob/a02cbf46cab4a8683e641efdba648a31498f7342/crates/toml_edit/src/parser/mod.rs#L99
4
5use core::fmt;
6use winnow::{error::ContextError, ModalParser};
7
8#[derive(Clone, Debug, PartialEq, Eq)]
9pub enum CustomError {
10    RecursionLimitExceeded,
11}
12
13impl fmt::Display for CustomError {
14    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
15        match self {
16            Self::RecursionLimitExceeded => f.write_str("recursion limit exceeded"),
17        }
18    }
19}
20
21impl core::error::Error for CustomError {}
22
23pub type Input<'a> = winnow::Stateful<&'a str, RecursionCheck>;
24
25#[inline]
26pub fn new_input(input: &str) -> Input<'_> {
27    winnow::Stateful { input, state: Default::default() }
28}
29
30pub fn check_recursion<'a, O>(
31    mut parser: impl ModalParser<Input<'a>, O, ContextError>,
32) -> impl ModalParser<Input<'a>, O, ContextError> {
33    move |input: &mut Input<'a>| {
34        input.state.enter().map_err(|_err| {
35            // TODO: Very weird bug with features: https://github.com/alloy-rs/core/issues/717
36            // use winnow::error::FromExternalError;
37            // let err = winnow::error::ContextError::from_external_error(input, _err);
38            let err = winnow::error::ContextError::new();
39            winnow::error::ErrMode::Cut(err)
40        })?;
41        let result = parser.parse_next(input);
42        input.state.exit();
43        result
44    }
45}
46
47#[derive(Clone, Debug, Default, PartialEq, Eq)]
48pub struct RecursionCheck {
49    current: usize,
50}
51
52const LIMIT: usize = 80;
53
54impl RecursionCheck {
55    #[cfg(any())]
56    fn check_depth(_depth: usize) -> Result<(), CustomError> {
57        if LIMIT <= _depth {
58            return Err(CustomError::RecursionLimitExceeded);
59        }
60
61        Ok(())
62    }
63
64    fn enter(&mut self) -> Result<(), CustomError> {
65        self.current += 1;
66        if LIMIT <= self.current {
67            return Err(CustomError::RecursionLimitExceeded);
68        }
69        Ok(())
70    }
71
72    fn exit(&mut self) {
73        self.current -= 1;
74    }
75}
alloy_sol_type_parser/input.rs

alloy_sol_type_parser/
input.rs
