45 lines
1.4 KiB
Rust
45 lines
1.4 KiB
Rust
use crate::syntax::ast::*;
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use crate::syntax::error::ParserError;
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use crate::syntax::parse::Parser;
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use crate::syntax::tokens::Lexer;
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use memmap2::Mmap;
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use std::collections::HashMap;
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use std::path::{Path, PathBuf};
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#[derive(Default)]
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pub struct Universe {
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pub files: HashMap<PathBuf, Mmap>,
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pub modules: HashMap<PathBuf, Module>,
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}
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impl Universe {
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/// Add a file to this universe.
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///
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/// This may result in other files being loaded on behalf of the file, if
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/// (for example) the given file has imports.
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pub fn add_file<P: AsRef<Path>>(&mut self, file: P) -> Result<(), ParserError> {
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let filename = file.as_ref().to_string_lossy().into_owned();
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let file_handle = std::fs::File::open(&file).map_err(|e| ParserError::OpenError {
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file: filename.clone(),
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error: e,
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})?;
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let contents = unsafe { Mmap::map(&file_handle) }.map_err(|e| ParserError::ReadError {
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file: filename.clone(),
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error: e,
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})?;
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let string_contents =
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std::str::from_utf8(&contents).map_err(|e| ParserError::Utf8Error {
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file: filename.clone(),
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error: e,
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})?;
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let lexer = Lexer::from(string_contents);
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let mut parser = Parser::new(&file, lexer);
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let module = parser.parse_module()?;
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self.modules.insert(file.as_ref().to_path_buf(), module);
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Ok(())
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}
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}
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