From 3610a259bafab91b5aa0fd8e2ef9d35ac9b28623 Mon Sep 17 00:00:00 2001
From: Pariksheet Nanda <pan79@pitt.edu>
Date: Tue, 21 Jul 2026 13:57:54 -0400
Subject: [PATCH] Review C++ lambda syntax for legacy slides 33-39/72 (#162)

Thanks to Patrick for suggesting the cppreference URL for students to
learn more later and talking through how best to briefly describe C++
lambdas.
---
 .../sections/Section_DataParallelPatterns.tex | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/Content/Presentations/sections/Section_DataParallelPatterns.tex b/Content/Presentations/sections/Section_DataParallelPatterns.tex
index c01881c9..38b5ec2c 100644
--- a/Content/Presentations/sections/Section_DataParallelPatterns.tex
+++ b/Content/Presentations/sections/Section_DataParallelPatterns.tex
@@ -271,6 +271,8 @@
 @gray);@gray
   \end{code}
 
+  (Will review C\texttt{++} Lambdas on the next slide)
+
   \pause
 
   A lambda is not \textit{magic}, it is the compiler \textbf{auto-generating} a \textbf{functor} for you.
@@ -291,6 +293,36 @@
 
 %==========================================================================
 
+\begin{frame}[fragile]{Quick review of C\texttt{++} Lambda syntax}
+  \url{https://cppreference.com/cpp/language/lambda}
+
+  C++ Lambdas auto-generate the variable capture code:
+
+    \begin{code}[keywords={}, frame=single, numbers=left]
+@grayKokkos::parallel_for(numberOfAtoms,@gray
+    [@pattern=@pattern] (const int64_t atomIndex) { // copy by value, implicit
+    @darkgreenatomForces@darkgreen[atomIndex] = calculateForce(@darkreddata@darkred);
+  }
+@gray);@gray
+\end{code}
+
+\begin{code}[keywords={}, frame=single, numbers=left, firstnumber=2]
+    [@patternatomForces, data@pattern] (const int64_t atomIndex) { // explicit
+\end{code}
+
+\pause
+
+\begin{code}[keywords={}, frame=single, numbers=left, firstnumber=2]
+    [@pattern&@pattern] (const int64_t atomIndex) { // by reference, implicit
+\end{code}
+
+\begin{code}[keywords={}, frame=single, numbers=left, firstnumber=2]
+    [@pattern&atomForces, &data@pattern] (const int64_t atomIndex) { // explicit
+\end{code}
+\end{frame}
+
+%==========================================================================
+
 \begin{frame}[fragile]{parallel\_for examples}
 
   \textbf{How does this compare to OpenMP?}