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//! ra_db defines basic database traits. Concrete DB is defined by ra_analysis.
mod syntax_ptr;
mod file_resolver;
mod input;
mod loc2id;
pub mod mock;
use std::sync::Arc;
use ra_editor::LineIndex;
use ra_syntax::{TextUnit, SourceFileNode};
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
pub struct Canceled;
pub type Cancelable<T> = Result<T, Canceled>;
impl std::fmt::Display for Canceled {
fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
fmt.write_str("Canceled")
}
}
impl std::error::Error for Canceled {}
pub use crate::{
syntax_ptr::LocalSyntaxPtr,
file_resolver::{FileResolver, FileResolverImp},
input::{
FilesDatabase, FileId, CrateId, SourceRoot, SourceRootId, CrateGraph, WORKSPACE,
FileTextQuery, FileSourceRootQuery, SourceRootQuery, LibrariesQuery, CrateGraphQuery,
},
loc2id::{LocationIntener, NumericId},
};
#[macro_export]
macro_rules! impl_numeric_id {
($id:ident) => {
impl $crate::NumericId for $id {
fn from_u32(id: u32) -> Self {
$id(id)
}
fn to_u32(self) -> u32 {
self.0
}
}
};
}
pub trait BaseDatabase: salsa::Database {
fn check_canceled(&self) -> Cancelable<()> {
if self.salsa_runtime().is_current_revision_canceled() {
Err(Canceled)
} else {
Ok(())
}
}
}
salsa::query_group! {
pub trait SyntaxDatabase: crate::input::FilesDatabase + BaseDatabase {
fn source_file(file_id: FileId) -> SourceFileNode {
type SourceFileQuery;
}
fn file_lines(file_id: FileId) -> Arc<LineIndex> {
type FileLinesQuery;
}
}
}
fn source_file(db: &impl SyntaxDatabase, file_id: FileId) -> SourceFileNode {
let text = db.file_text(file_id);
SourceFileNode::parse(&*text)
}
fn file_lines(db: &impl SyntaxDatabase, file_id: FileId) -> Arc<LineIndex> {
let text = db.file_text(file_id);
Arc::new(LineIndex::new(&*text))
}
#[derive(Clone, Copy, Debug)]
pub struct FilePosition {
pub file_id: FileId,
pub offset: TextUnit,
}
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