From 3ec01ae5dc3c8fc3b2d0ccdb36155d0547b93728 Mon Sep 17 00:00:00 2001
From: Jacob Hughes <j@distanthills.org>
Date: Mon, 16 Oct 2023 11:38:42 -0400
Subject: [PATCH] debug_printf: hlsl-out

---
 src/back/hlsl/writer.rs | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/back/hlsl/writer.rs b/src/back/hlsl/writer.rs
index 7889842197..05e92ae67a 100644
--- a/src/back/hlsl/writer.rs
+++ b/src/back/hlsl/writer.rs
@@ -2008,8 +2008,19 @@ impl<'a, W: fmt::Write> super::Writer<'a, W> {
                 writeln!(self.out, "{level}}}")?
             }
             Statement::RayQuery { .. } => unreachable!(),
-            Statement::DebugPrint { .. } => {
-                return Err(Error::Unimplemented("debug printf".to_string()));
+            Statement::DebugPrintf {
+                ref format,
+                ref arguments,
+            } => {
+                write!(self.out, "{level}")?;
+                write!(self.out, "printf(\"{format}\",")?;
+                for (index, argument) in arguments.iter().enumerate() {
+                    if index != 0 {
+                        write!(self.out, ", ")?;
+                    }
+                    self.write_expr(module, *argument, func_ctx)?;
+                }
+                writeln!(self.out, ");")?
             }
         }