lazily calls some fns

2021-03-26 22:32:37 +03:00
parent e423058751
commit 229d199994
7 changed files with 14 additions and 13 deletions
--- a/compiler/rustc_errors/src/json.rs
+++ b/compiler/rustc_errors/src/json.rs
@@ -493,7 +493,7 @@ impl DiagnosticSpanLine {
        h_end: usize,
    ) -> DiagnosticSpanLine {
        DiagnosticSpanLine {
-            text: sf.get_line(index).map_or(String::new(), |l| l.into_owned()),
+            text: sf.get_line(index).map_or_else(String::new, |l| l.into_owned()),
            highlight_start: h_start,
            highlight_end: h_end,
        }