forked from katzen-cafe/iowo
49 lines
1.9 KiB
Rust
49 lines
1.9 KiB
Rust
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use codespan_reporting::diagnostic::{Diagnostic, Label};
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pub type FileId = usize;
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/// The enum representing a syntax error, used for error reporting
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#[derive(Debug, Clone)]
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pub enum SyntaxError {
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/// This variant indicates a token that the Lexer didn't recognize
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InvalidToken(Vec<(FileId, logos::Span)>),
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/// `MissingStreamer` means, that the pipeline starts with a Pipe (`|`), so it has no streamer as input in front of it.
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MissingStreamer(Vec<(FileId, logos::Span)>),
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/// `MissingSink` means, that the pipeline ends with a Pipe (`|`), meaning that the output can't go anywhere
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MissingSink,
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/// This indicates a missing filter somewhere in the pipeline, meaning that there's 2 pipes after one another
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MissingFilter,
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/// A literal cannot be a sink
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LiteralAsSink,
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/// A literal can't be a filter either
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LiteralAsFilter,
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/// A literal acting as streamer cannot take arguments
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LiteralWithArgs,
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}
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impl SyntaxError {
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pub fn to_diagnostic(&self) -> Diagnostic<usize> {
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match self {
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Self::InvalidToken(errs) => Diagnostic::error()
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.with_message("failed to parse invalid tokens")
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.with_labels(
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errs.into_iter()
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.map(|(file_id, span)| {
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Label::primary(*file_id, span.clone()).with_message("invalid token")
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})
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.collect(),
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),
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Self::MissingStreamer(locs) => Diagnostic::error()
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.with_message("pipelines must always start with a streamer")
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.with_labels(
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locs.into_iter()
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.map(|(file_id, span)| {
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Label::primary(*file_id, span.clone()).with_message("missing streamer")
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})
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.collect(),
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),
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_ => todo!(),
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}
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}
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}
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