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use std::sync::Arc;
use ra_db::{salsa, SourceDatabase};
use ra_syntax::{Parse, SyntaxNode};
use crate::{
ast_id_map::{AstIdMap, ErasedFileAstId},
expand::{HirFileId, MacroCallId, MacroCallLoc, MacroDefId, MacroFile},
};
#[salsa::query_group(AstDatabaseStorage)]
pub trait AstDatabase: SourceDatabase {
fn ast_id_map(&self, file_id: HirFileId) -> Arc<AstIdMap>;
#[salsa::transparent]
fn ast_id_to_node(&self, file_id: HirFileId, ast_id: ErasedFileAstId) -> SyntaxNode;
#[salsa::transparent]
#[salsa::invoke(crate::expand::parse_or_expand_query)]
fn parse_or_expand(&self, file_id: HirFileId) -> Option<SyntaxNode>;
#[salsa::interned]
fn intern_macro(&self, macro_call: MacroCallLoc) -> MacroCallId;
#[salsa::invoke(crate::expand::macro_arg_query)]
fn macro_arg(&self, id: MacroCallId) -> Option<Arc<tt::Subtree>>;
#[salsa::invoke(crate::expand::macro_def_query)]
fn macro_def(&self, id: MacroDefId) -> Option<Arc<mbe::MacroRules>>;
#[salsa::invoke(crate::expand::parse_macro_query)]
fn parse_macro(&self, macro_file: MacroFile) -> Option<Parse<SyntaxNode>>;
#[salsa::invoke(crate::expand::macro_expand_query)]
fn macro_expand(&self, macro_call: MacroCallId) -> Result<Arc<tt::Subtree>, String>;
}
pub(crate) fn ast_id_map(db: &impl AstDatabase, file_id: HirFileId) -> Arc<AstIdMap> {
let map =
db.parse_or_expand(file_id).map_or_else(AstIdMap::default, |it| AstIdMap::from_source(&it));
Arc::new(map)
}
pub(crate) fn ast_id_to_node(
db: &impl AstDatabase,
file_id: HirFileId,
ast_id: ErasedFileAstId,
) -> SyntaxNode {
let node = db.parse_or_expand(file_id).unwrap();
db.ast_id_map(file_id)[ast_id].to_node(&node)
}
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