bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/ide_ssr/src/fragments.rs')
-rw-r--r--crates/ide_ssr/src/fragments.rs14
1 files changed, 14 insertions, 0 deletions
diff --git a/crates/ide_ssr/src/fragments.rs b/crates/ide_ssr/src/fragments.rs
index 72d26d53a3..512b3ace01 100644
--- a/crates/ide_ssr/src/fragments.rs
+++ b/crates/ide_ssr/src/fragments.rs
@@ -35,3 +35,17 @@ pub(crate) fn item(s: &str) -> Result<SyntaxNode, ()> {
}
Ok(node.syntax().clone())
}
+
+pub(crate) fn expr(s: &str) -> Result<SyntaxNode, ()> {
+ let template = "const _: () = {};";
+ let input = template.replace("{}", s);
+ let parse = syntax::SourceFile::parse(&input);
+ if !parse.errors().is_empty() {
+ return Err(());
+ }
+ let node = parse.tree().syntax().descendants().find_map(ast::Expr::cast).ok_or(())?;
+ if node.to_string() != s {
+ return Err(());
+ }
+ Ok(node.syntax().clone())
+}