X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=compiler%2Frustc_session%2Fsrc%2Fsession.rs;h=4c049a8d628ef0e4336f111cb57c49fddbd3166d;hb=fbfc5ada029dd7892cbdb64a7f6cffee7f898385;hp=e99e460913ef0f8799cd5d9412b59e11b8619ff6;hpb=1195b672fb58364e4ca7022fbbe62a9a7a451b60;p=rust.git

diff --git a/compiler/rustc_session/src/session.rs b/compiler/rustc_session/src/session.rs
index e99e460913e..4c049a8d628 100644
--- a/compiler/rustc_session/src/session.rs
+++ b/compiler/rustc_session/src/session.rs
@@ -952,6 +952,17 @@ pub fn first_attr_value_str_by_name(
     ) -> Option<Symbol> {
         attrs.iter().find(|at| at.has_name(name)).and_then(|at| at.value_str())
     }
+
+    pub fn diagnostic_width(&self) -> usize {
+        let default_column_width = 140;
+        if let Some(width) = self.opts.diagnostic_width {
+            width
+        } else if self.opts.unstable_opts.ui_testing {
+            default_column_width
+        } else {
+            termize::dimensions().map_or(default_column_width, |(w, _)| w)
+        }
+    }
 }
 
 // JUSTIFICATION: defn of the suggested wrapper fns