while let all the things

2018-03-05 15:58:54 -03:00
parent e2746d8700
commit 2e7e68b762
6 changed files with 20 additions and 50 deletions
--- a/src/libsyntax_pos/lib.rs
+++ b/src/libsyntax_pos/lib.rs
@@ -322,12 +322,7 @@ impl Span {
    pub fn macro_backtrace(mut self) -> Vec<MacroBacktrace> {
        let mut prev_span = DUMMY_SP;
        let mut result = vec![];
-        loop {
-            let info = match self.ctxt().outer().expn_info() {
-                Some(info) => info,
-                None => break,
-            };
-
+        while let Some(info) = self.ctxt().outer().expn_info() {
            let (pre, post) = match info.callee.format {
                ExpnFormat::MacroAttribute(..) => ("#[", "]"),
                ExpnFormat::MacroBang(..) => ("", "!"),