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Make sure that newly created nodes are the root of the tree

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This commit is contained in:
Aleksey Kladov 2020-02-04 13:22:32 +01:00
parent c1a06499fa
commit 4ea0c12cf1
1 changed files with 11 additions and 2 deletions
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13
crates/ra_syntax/src/ast/make.rs
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@ -2,7 +2,7 @@
//! of smaller pieces.
use itertools::Itertools;
use crate::{ast, AstNode, SourceFile, SyntaxKind, SyntaxToken};
use crate::{ast, AstNode, SourceFile, SyntaxKind, SyntaxNode, SyntaxToken};
pub fn name(text: &str) -> ast::Name {
ast_from_text(&format!("mod {};", text))
@ -179,7 +179,16 @@ pub fn token(kind: SyntaxKind) -> SyntaxToken {
fn ast_from_text<N: AstNode>(text: &str) -> N {
let parse = SourceFile::parse(text);
parse.tree().syntax().descendants().find_map(N::cast).unwrap()
let node = parse.tree().syntax().descendants().find_map(N::cast).unwrap();
let node = node.syntax().clone();
let node = unroot(node);
let node = N::cast(node).unwrap();
assert_eq!(node.syntax().text_range().start(), 0.into());
node
}
fn unroot(n: SyntaxNode) -> SyntaxNode {
SyntaxNode::new_root(n.green().clone())
}
pub mod tokens {