mirror of
https://github.com/edg-l/edlang.git
synced 2024-09-19 01:02:25 +00:00
61 lines
2 KiB
Rust
61 lines
2 KiB
Rust
use crate::{
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ast::{self, Statement},
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codegen::ProgramData,
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};
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use annotate_snippets::{
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display_list::{DisplayList, FormatOptions},
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snippet::{Annotation, AnnotationType, Slice, Snippet, SourceAnnotation},
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};
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#[derive(Debug)]
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pub enum Check<'a> {
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Warning(DisplayList<'a>),
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Error(DisplayList<'a>),
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}
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/// Checks this is a valid edlang program.
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pub fn check<'a>(data: &'a ProgramData, ast: &ast::Program) -> Vec<Check<'a>> {
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let mut errors = vec![];
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for statement in &ast.statements {
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match &statement.value {
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Statement::Assignment(_x) => {
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// can't have a top level assignment yet.
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let snippet = Snippet {
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title: Some(Annotation {
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id: None,
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label: Some("unexpected assignment at top level"),
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annotation_type: AnnotationType::Error,
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}),
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footer: vec![],
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slices: vec![Slice {
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source: &data.source,
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line_start: 1,
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fold: true,
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origin: Some(&data.filename),
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annotations: vec![
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SourceAnnotation {
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label: "unexpected statement",
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annotation_type: AnnotationType::Error,
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range: statement.span.into(),
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},
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],
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}],
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opt: FormatOptions {
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color: true,
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..Default::default()
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},
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};
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let dl = DisplayList::from(snippet);
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errors.push(Check::Error(dl));
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}
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Statement::Definition(_) => todo!(),
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Statement::Return(_) => unreachable!(),
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Statement::Function(_function) => {}
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}
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}
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errors
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}
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