dampen_core/parser/
error.rs

1use crate::ir::span::Span;
2use proc_macro2::TokenStream;
3use quote::quote;
4
5/// Error during parsing
6#[derive(Debug, Clone, PartialEq)]
7pub struct ParseError {
8    pub kind: ParseErrorKind,
9    pub message: String,
10    pub span: Span,
11    pub suggestion: Option<String>,
12}
13
14#[derive(Debug, Clone, Copy, PartialEq, Eq)]
15pub enum ParseErrorKind {
16    XmlSyntax,
17    UnknownWidget,
18    UnknownAttribute,
19    InvalidValue,
20    InvalidExpression,
21    UnclosedBinding,
22    MissingAttribute,
23}
24
25impl std::fmt::Display for ParseError {
26    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
27        write!(
28            f,
29            "error[{}]: {} at line {}, column {}",
30            self.kind as u8, self.message, self.span.line, self.span.column
31        )?;
32        if let Some(suggestion) = &self.suggestion {
33            write!(f, "\n  help: {}", suggestion)?;
34        }
35        Ok(())
36    }
37}
38
39impl ParseError {
40    /// Convert this error into a compile_error! macro invocation.
41    ///
42    /// This is used by procedural macros to emit compile-time errors
43    /// with proper location information and helpful suggestions.
44    ///
45    /// # Returns
46    ///
47    /// A `TokenStream` containing a `compile_error!` macro invocation.
48    pub fn to_compile_error(&self) -> TokenStream {
49        let message = format!(
50            "Dampen parsing error: {}\n  at line {}, column {}",
51            self.message, self.span.line, self.span.column
52        );
53
54        let mut tokens = quote! {
55            compile_error!(#message);
56        };
57
58        if let Some(ref suggestion) = self.suggestion {
59            let help = format!("help: {}", suggestion);
60            tokens.extend(quote! {
61                compile_error!(#help);
62            });
63        }
64
65        tokens
66    }
67}
dampen_core/parser/error.rs

dampen_core/parser/
error.rs
