Avoid some code duplication.

nnethercote · nnethercote · commit cc62d5529802 · 2025-08-04T08:18:28.000+10:00
`print_binder` can call `wrap_binder`.
diff --git a/compiler/rustc_middle/src/ty/print/pretty.rs b/compiler/rustc_middle/src/ty/print/pretty.rs
@@ -2437,12 +2437,7 @@ impl<'tcx> PrettyPrinter<'tcx> for FmtPrinter<'_, 'tcx> {
     where
         T: Print<'tcx, Self> + TypeFoldable<TyCtxt<'tcx>>,
     {
-        let old_region_index = self.region_index;
-        let (new_value, _) = self.name_all_regions(value, WrapBinderMode::ForAll)?;
-        new_value.print(self)?;
-        self.region_index = old_region_index;
-        self.binder_depth -= 1;
-        Ok(())
+        self.wrap_binder(value, WrapBinderMode::ForAll, |new_value, this| new_value.print(this))
     }
 
     fn wrap_binder<T, C: FnOnce(&T, &mut Self) -> Result<(), PrintError>>(

Original file line number	Diff line number	Diff line change
`@@ -2437,12 +2437,7 @@ impl<'tcx> PrettyPrinter<'tcx> for FmtPrinter<'_, 'tcx> {`
`2437`	`2437`	`where`
`2438`	`2438`	`T: Print<'tcx, Self> + TypeFoldable<TyCtxt<'tcx>>,`
`2439`	`2439`	`{`
`2440`		`- let old_region_index = self.region_index;`
`2441`		`- let (new_value, _) = self.name_all_regions(value, WrapBinderMode::ForAll)?;`
`2442`		`- new_value.print(self)?;`
`2443`		`- self.region_index = old_region_index;`
`2444`		`- self.binder_depth -= 1;`
`2445`		`- Ok(())`
	`2440`	`+ self.wrap_binder(value, WrapBinderMode::ForAll, \|new_value, this\| new_value.print(this))`
`2446`	`2441`	`}`
`2447`	`2442`
`2448`	`2443`	`fn wrap_binder<T, C: FnOnce(&T, &mut Self) -> Result<(), PrintError>>(`