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/// Begining of macro expansion.
///
/// This code should be moved out of ra_analysis into hir (?) ideally.
use std::sync::Arc;
use ra_syntax::{ast, AstNode, TextUnit};
use hir::MacroDatabase;
use crate::{db::RootDatabase, FileId};
pub(crate) fn expand(
db: &RootDatabase,
_file_id: FileId,
macro_call: ast::MacroCall,
) -> Option<(TextUnit, Arc<hir::MacroExpansion>)> {
let path = macro_call.path()?;
if path.qualifier().is_some() {
return None;
}
let name_ref = path.segment()?.name_ref()?;
if name_ref.text() != "ctry" {
return None;
}
let arg = macro_call.token_tree()?.syntax();
let def = hir::MacroDef::CTry;
let input = hir::MacroInput {
text: arg.text().to_string(),
};
let exp = db.expand_macro(def, input)?;
Some((arg.range().start(), exp))
}
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