Preserve comments between attribute and use item
@@ -15,6 +15,7 @@ use syntax::ast::{self, UseTreeKind};
use syntax::codemap::{self, BytePos, Span, DUMMY_SP};
use codemap::SpanUtils;
+use comment::combine_strs_with_missing_comments;
use config::IndentStyle;
use lists::{definitive_tactic, itemize_list, write_list, ListFormatting, ListItem, Separator};
use rewrite::{Rewrite, RewriteContext};
@@ -219,26 +220,26 @@ impl fmt::Display for UseTree {
impl UseTree {
// Rewrite use tree with `use ` and a trailing `;`.
pub fn rewrite_top_level(&self, context: &RewriteContext, shape: Shape) -> Option<String> {
- let mut result = String::with_capacity(256);
- if let Some(ref attrs) = self.attrs {
- result.push_str(&attrs.rewrite(context, shape)?);
- if !result.is_empty() {
- result.push_str(&shape.indent.to_string_with_newline(context.config));
- }
- }
-
let vis = self.visibility
.as_ref()
.map_or(Cow::from(""), |vis| ::utils::format_visibility(&vis));
- result.push_str(&self.rewrite(context, shape.offset_left(vis.len())?)
+ let use_str = self.rewrite(context, shape.offset_left(vis.len())?)
.map(|s| {
if s.is_empty() {
s.to_owned()
} else {
format!("{}use {};", vis, s)
}
- })?);
- Some(result)
+ })?;
+ if let Some(ref attrs) = self.attrs {
+ let attr_str = attrs.rewrite(context, shape)?;
+ let lo = attrs.last().as_ref()?.span().hi();
+ let hi = self.span.lo();
+ let span = mk_sp(lo, hi);
+ combine_strs_with_missing_comments(context, &attr_str, &use_str, span, shape, false)
+ } else {
+ Some(use_str)
+ }
}
// FIXME: Use correct span?
