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migrate ra_fmt to new rowan

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This commit is contained in:
Aleksey Kladov 2019-07-19 00:35:27 +03:00
parent 08fd402ef2
commit 7e02aa0eff
1 changed files with 7 additions and 7 deletions
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14
crates/ra_fmt/src/lib.rs
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@ -3,7 +3,7 @@
use itertools::Itertools;
use ra_syntax::{
ast::{self, AstNode, AstToken},
SyntaxKind,
SmolStr, SyntaxKind,
SyntaxKind::*,
SyntaxNode, SyntaxToken, T,
};
@ -15,12 +15,12 @@ pub fn reindent(text: &str, indent: &str) -> String {
}
/// If the node is on the beginning of the line, calculate indent.
pub fn leading_indent(node: &SyntaxNode) -> Option<&str> {
pub fn leading_indent(node: &SyntaxNode) -> Option<SmolStr> {
for token in prev_tokens(node.first_token()?) {
if let Some(ws) = ast::Whitespace::cast(token) {
if let Some(ws) = ast::Whitespace::cast(token.clone()) {
let ws_text = ws.text();
if let Some(pos) = ws_text.rfind('\n') {
return Some(&ws_text[pos + 1..]);
return Some(ws_text[pos + 1..].into());
}
}
if token.text().contains('\n') {
@ -31,17 +31,17 @@ pub fn leading_indent(node: &SyntaxNode) -> Option<&str> {
}
fn prev_tokens(token: SyntaxToken) -> impl Iterator<Item = SyntaxToken> {
successors(token.prev_token(), |&token| token.prev_token())
successors(token.prev_token(), |token| token.prev_token())
}
pub fn extract_trivial_expression(block: &ast::Block) -> Option<&ast::Expr> {
pub fn extract_trivial_expression(block: &ast::Block) -> Option<ast::Expr> {
let expr = block.expr()?;
if expr.syntax().text().contains('\n') {
return None;
}
let non_trivial_children = block.syntax().children().filter(|it| match it.kind() {
WHITESPACE | T!['{'] | T!['}'] => false,
_ => it != &expr.syntax(),
_ => it != expr.syntax(),
});
if non_trivial_children.count() > 0 {
return None;