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-rw-r--r--crates/ra_syntax/src/ast/edit.rs28
-rw-r--r--crates/ra_syntax/src/ast/make.rs8
2 files changed, 36 insertions, 0 deletions
diff --git a/crates/ra_syntax/src/ast/edit.rs b/crates/ra_syntax/src/ast/edit.rs
index ea92284b8..47bdbb81a 100644
--- a/crates/ra_syntax/src/ast/edit.rs
+++ b/crates/ra_syntax/src/ast/edit.rs
@@ -284,6 +284,34 @@ impl IndentLevel {
284 .collect(); 284 .collect();
285 algo::replace_descendants(&node, &replacements) 285 algo::replace_descendants(&node, &replacements)
286 } 286 }
287
288 pub fn decrease_indent<N: AstNode>(self, node: N) -> N {
289 N::cast(self._decrease_indent(node.syntax().clone())).unwrap()
290 }
291
292 fn _decrease_indent(self, node: SyntaxNode) -> SyntaxNode {
293 let replacements: FxHashMap<SyntaxElement, SyntaxElement> = node
294 .descendants_with_tokens()
295 .filter_map(|el| el.into_token())
296 .filter_map(ast::Whitespace::cast)
297 .filter(|ws| {
298 let text = ws.syntax().text();
299 text.contains('\n')
300 })
301 .map(|ws| {
302 (
303 ws.syntax().clone().into(),
304 make::tokens::whitespace(
305 &ws.syntax()
306 .text()
307 .replace(&format!("\n{:1$}", "", self.0 as usize * 4), "\n"),
308 )
309 .into(),
310 )
311 })
312 .collect();
313 algo::replace_descendants(&node, &replacements)
314 }
287} 315}
288 316
289// FIXME: replace usages with IndentLevel above 317// FIXME: replace usages with IndentLevel above
diff --git a/crates/ra_syntax/src/ast/make.rs b/crates/ra_syntax/src/ast/make.rs
index 143835172..00422ea91 100644
--- a/crates/ra_syntax/src/ast/make.rs
+++ b/crates/ra_syntax/src/ast/make.rs
@@ -128,6 +128,14 @@ pub fn where_clause(preds: impl Iterator<Item = ast::WherePred>) -> ast::WhereCl
128 } 128 }
129} 129}
130 130
131pub fn if_expression(condition: &ast::Expr, statement: &str) -> ast::IfExpr {
132 return ast_from_text(&format!(
133 "fn f() {{ if !{} {{\n {}\n}}\n}}",
134 condition.syntax().text(),
135 statement
136 ));
137}
138
131fn ast_from_text<N: AstNode>(text: &str) -> N { 139fn ast_from_text<N: AstNode>(text: &str) -> N {
132 let parse = SourceFile::parse(text); 140 let parse = SourceFile::parse(text);
133 let res = parse.tree().syntax().descendants().find_map(N::cast).unwrap(); 141 let res = parse.tree().syntax().descendants().find_map(N::cast).unwrap();