From b93a41a9a3c1af60bdf7f2dcd56d0d5d14aab429 Mon Sep 17 00:00:00 2001
From: kojix2 <2xijok@gmail.com>
Date: Sun, 11 Aug 2024 00:26:33 +0900
Subject: [PATCH 1/2] Add print_with_writer to PrettyPrint

---
 src/pretty_printer.rs | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/pretty_printer.rs b/src/pretty_printer.rs
index eb123ea339..aa06a78b55 100644
--- a/src/pretty_printer.rs
+++ b/src/pretty_printer.rs
@@ -279,6 +279,11 @@ impl<'a> PrettyPrinter<'a> {
     /// If you want to call 'print' multiple times, you have to call the appropriate
     /// input_* methods again.
     pub fn print(&mut self) -> Result<bool> {
+        self.print_with_writer(None::<&mut dyn std::fmt::Write>)
+    }
+
+    /// Pretty-print all specified inputs to a specified writer.
+    pub fn print_with_writer<W: std::fmt::Write>(&mut self, writer: Option<W>) -> Result<bool> {
         let highlight_lines = std::mem::take(&mut self.highlighted_lines);
         self.config.highlighted_lines = HighlightedLineRanges(LineRanges::from(highlight_lines));
         self.config.term_width = self
@@ -315,7 +320,13 @@ impl<'a> PrettyPrinter<'a> {
 
         // Run the controller
         let controller = Controller::new(&self.config, &self.assets);
-        controller.run(inputs.into_iter().map(|i| i.into()).collect(), None)
+
+        // If writer is provided, pass it to the controller, otherwise pass None
+        if let Some(mut w) = writer {
+            controller.run(inputs.into_iter().map(|i| i.into()).collect(), Some(&mut w))
+        } else {
+            controller.run(inputs.into_iter().map(|i| i.into()).collect(), None)
+        }
     }
 }
 

From c533a4aa146f3d623d7f8f113b13e08abae849d9 Mon Sep 17 00:00:00 2001
From: kojix2 <2xijok@gmail.com>
Date: Wed, 23 Oct 2024 21:42:02 +0900
Subject: [PATCH 2/2] Update CHANGELOG.md

---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c404042f67..67c9ee19ae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -72,6 +72,7 @@
   - [BREAKING] `SyntaxMapping::mappings` is replaced by `SyntaxMapping::{builtin,custom,all}_mappings`
 - Make `Controller::run_with_error_handler`'s error handler `FnMut`, see #2831 (@rhysd)
 - Improve compile time by 20%, see #2815 (@dtolnay)
+- Add `PrettyPrinter::print_with_writer` for custom output destinations, see #3070 (@kojix2)
 
 # v0.24.0