mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Improve panic message for ast_from_text

Browse Source
This commit is contained in:
Edwin Cheng 2020-05-10 03:46:12 +08:00
parent 8295a9340c
commit 0f1d39133c
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
crates/ra_syntax/src/ast/make.rs
View File

@ -300,7 +300,12 @@ pub fn add_pub_crate_modifier(fn_def: ast::FnDef) -> ast::FnDef {
fn ast_from_text<N: AstNode>(text: &str) -> N {
let parse = SourceFile::parse(text);
let node = parse.tree().syntax().descendants().find_map(N::cast).unwrap();
let node = match parse.tree().syntax().descendants().find_map(N::cast) {
Some(it) => it,
None => {
panic!("Failed to make ast node `{}` from text {}", std::any::type_name::<N>(), text)
}
};
let node = node.syntax().clone();
let node = unroot(node);
let node = N::cast(node).unwrap();