syn_solidity/item/
error.rs

1use crate::{kw, ParameterList, SolIdent, Spanned, Type};
2use proc_macro2::Span;
3use std::fmt;
4use syn::{
5    parenthesized,
6    parse::{Parse, ParseStream},
7    token::Paren,
8    Attribute, Result, Token,
9};
10
11/// An error definition: `error Foo(uint256 a, uint256 b);`.
12///
13/// Solidity reference:
14/// <https://docs.soliditylang.org/en/latest/grammar.html#a4.SolidityParser.errorDefinition>
15#[derive(Clone)]
16pub struct ItemError {
17    pub attrs: Vec<Attribute>,
18    pub error_token: kw::error,
19    pub name: SolIdent,
20    pub paren_token: Paren,
21    pub parameters: ParameterList,
22    pub semi_token: Token![;],
23}
24
25impl fmt::Display for ItemError {
26    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
27        write!(f, "error {}({});", self.name, self.parameters)
28    }
29}
30
31impl fmt::Debug for ItemError {
32    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
33        f.debug_struct("ItemError")
34            .field("attrs", &self.attrs)
35            .field("name", &self.name)
36            .field("fields", &self.parameters)
37            .finish()
38    }
39}
40
41impl Parse for ItemError {
42    fn parse(input: ParseStream<'_>) -> Result<Self> {
43        let content;
44        Ok(Self {
45            attrs: input.call(Attribute::parse_outer)?,
46            error_token: input.parse()?,
47            name: input.parse()?,
48            paren_token: parenthesized!(content in input),
49            parameters: content.parse()?,
50            semi_token: input.parse()?,
51        })
52    }
53}
54
55impl Spanned for ItemError {
56    fn span(&self) -> Span {
57        self.name.span()
58    }
59
60    fn set_span(&mut self, span: Span) {
61        self.name.set_span(span);
62    }
63}
64
65impl ItemError {
66    pub fn as_type(&self) -> Type {
67        let mut ty = Type::Tuple(self.parameters.types().cloned().collect());
68        ty.set_span(self.span());
69        ty
70    }
71}
syn_solidity/item/error.rs

syn_solidity/item/
error.rs
