oak_nix/builder/
mod.rs

1use crate::{ast::*, language::NixLanguage, parser::element_type::NixElementType};
2use oak_core::{Builder, BuilderCache, GreenNode, GreenTree, OakDiagnostics, OakError, Range, SourceText, TextEdit, builder::BuildOutput, source::Source};
3
4/// Builder for Nix language structures.
5#[derive(Clone)]
6pub struct NixBuilder<'config> {
7    config: &'config NixLanguage,
8}
9
10impl<'config> NixBuilder<'config> {
11    /// Creates a new `NixBuilder` with the given configuration.
12    pub fn new(config: &'config NixLanguage) -> Self {
13        Self { config }
14    }
15}
16
17impl<'config> Builder<NixLanguage> for NixBuilder<'config> {
18    fn build<'a, S: Source + ?Sized>(&self, source: &S, edits: &[TextEdit], _cache: &'a mut impl BuilderCache<NixLanguage>) -> BuildOutput<NixLanguage> {
19        let parser = crate::parser::NixParser::new(self.config);
20        let lexer = crate::lexer::NixLexer::new(&self.config);
21
22        let mut session = oak_core::parser::session::ParseSession::<NixLanguage>::default();
23        let parse_result = oak_core::parser::parse(&parser, &lexer, source, edits, &mut session);
24
25        match parse_result.result {
26            Ok(green_tree) => {
27                let source_text = SourceText::new(source.get_text_in((0..source.length()).into()).into_owned());
28                match self.build_root(green_tree.clone(), &source_text) {
29                    Ok(ast_root) => OakDiagnostics { result: Ok(ast_root), diagnostics: parse_result.diagnostics },
30                    Err(build_error) => {
31                        let mut diagnostics = parse_result.diagnostics;
32                        diagnostics.push(build_error.clone());
33                        OakDiagnostics { result: Err(build_error), diagnostics }
34                    }
35                }
36            }
37            Err(parse_error) => OakDiagnostics { result: Err(parse_error), diagnostics: parse_result.diagnostics },
38        }
39    }
40}
41
42impl<'config> NixBuilder<'config> {
43    pub(crate) fn build_root(&self, green_tree: GreenNode<NixLanguage>, source: &SourceText) -> Result<NixRoot, OakError> {
44        let expr = self.build_expr(&green_tree, 0, source)?;
45        Ok(NixRoot { expr })
46    }
47
48    fn build_expr(&self, node: &GreenNode<NixLanguage>, offset: usize, source: &SourceText) -> Result<NixExpr, OakError> {
49        let span = Range { start: offset, end: offset + node.byte_length as usize };
50
51        match node.kind {
52            NixElementType::Number => {
53                let text = source.get_text_in(span.clone());
54                let val = text.parse::<f64>().unwrap_or(0.0);
55                Ok(NixExpr::Literal(NixLiteral::Number(val, span)))
56            }
57            NixElementType::Boolean | NixElementType::True | NixElementType::False => {
58                let text = source.get_text_in(span.clone());
59                let val = text == "true";
60                Ok(NixExpr::Literal(NixLiteral::Boolean(val, span)))
61            }
62            NixElementType::Null => Ok(NixExpr::Literal(NixLiteral::Null(span))),
63            NixElementType::Identifier => {
64                let name = source.get_text_in(span.clone()).to_string();
65                Ok(NixExpr::Identifier(NixIdentifier { name, span }))
66            }
67            NixElementType::String => {
68                let text = source.get_text_in(span.clone()).to_string();
69                Ok(NixExpr::Literal(NixLiteral::String(text, span)))
70            }
71            _ => {
72                // For other types, try to find a child node that is an expression
73                for child in node.children {
74                    if let GreenTree::Node(n) = child {
75                        return self.build_expr(n, offset, source);
76                    }
77                }
78                // Fallback to identifier if nothing else matches (this is very basic)
79                let name = source.get_text_in(span.clone()).to_string();
80                Ok(NixExpr::Identifier(NixIdentifier { name, span }))
81            }
82        }
83    }
84}
oak_nix/builder/mod.rs

oak_nix/builder/
mod.rs
