622006ecc5
Use the source map to track instruction locations instead. The rewrite methods now take an AnyEntity argument as the location to use for errors. This means that bad EBB references in jump tables are now reported correctly.
45 lines
1.0 KiB
Rust
45 lines
1.0 KiB
Rust
//! Define the `Location`, `Error`, and `Result` types.
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#![macro_use]
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use std::fmt;
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use std::result;
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/// The location of a `Token` or `Error`.
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
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pub struct Location {
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pub line_number: usize,
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}
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/// A parse error is returned when the parse failed.
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#[derive(Debug)]
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pub struct Error {
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pub location: Location,
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pub message: String,
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}
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impl fmt::Display for Error {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}: {}", self.location.line_number, self.message)
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}
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}
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pub type Result<T> = result::Result<T, Error>;
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// Create an `Err` variant of `Result<X>` from a location and `format!` args.
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macro_rules! err {
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( $loc:expr, $msg:expr ) => {
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Err($crate::Error {
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location: $loc.clone(),
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message: String::from($msg),
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})
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};
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( $loc:expr, $fmt:expr, $( $arg:expr ),+ ) => {
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Err($crate::Error {
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location: $loc.clone(),
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message: format!( $fmt, $( $arg ),+ ),
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})
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};
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}
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