Auto merge of #115782 - a1phyr:improve_pad_adapter, r=dtolnay

bors · bors · commit 3ae41aa6f768 · 2023-09-16T23:57:48.000Z
Improve `PadAdapter::write_char` Split from #108043
diff --git a/library/core/src/fmt/builders.rs b/library/core/src/fmt/builders.rs
@@ -40,6 +40,14 @@ impl fmt::Write for PadAdapter<'_, '_> {
 
         Ok(())
     }
+
+    fn write_char(&mut self, c: char) -> fmt::Result {
+        if self.state.on_newline {
+            self.buf.write_str("    ")?;
+        }
+        self.state.on_newline = c == '\n';
+        self.buf.write_char(c)
+    }
 }
 
 /// A struct to help with [`fmt::Debug`](Debug) implementations.

Original file line number	Diff line number	Diff line change
`@@ -40,6 +40,14 @@ impl fmt::Write for PadAdapter<'_, '_> {`
`40`	`40`
`41`	`41`	`Ok(())`
`42`	`42`	`}`
	`43`	`+`
	`44`	`+ fn write_char(&mut self, c: char) -> fmt::Result {`
	`45`	`+ if self.state.on_newline {`
	`46`	`+ self.buf.write_str(" ")?;`
	`47`	`+ }`
	`48`	`+ self.state.on_newline = c == '\n';`
	`49`	`+ self.buf.write_char(c)`
	`50`	`+ }`
`43`	`51`	`}`
`44`	`52`
`45`	`53`	/// A struct to help with [`fmt::Debug`](Debug) implementations.