From 5a9e63549ee2d755c0061927b36ab61737aec012 Mon Sep 17 00:00:00 2001
From: Anthony Calandra <anthony@anthony-calandra.com>
Date: Mon, 20 Feb 2023 19:57:45 -0500
Subject: [PATCH] Add the transform examples for the std::reduce section.

---
 CPP17.md  | 9 +++++++++
 README.md | 9 +++++++++
 2 files changed, 18 insertions(+)

diff --git a/CPP17.md b/CPP17.md
index a4b2492..07e3189 100644
--- a/CPP17.md
+++ b/CPP17.md
@@ -560,6 +560,15 @@ std::reduce(std::cbegin(a), std::cend(a)); // == 6
 // Using a custom binary op:
 std::reduce(std::cbegin(a), std::cend(a), 1, std::multiplies<>{}); // == 6
 ```
+Additionally you can specify transformations for reducers:
+```c++
+std::transform_reduce(std::cbegin(a), std::cend(a), 0, std::plus<>{}, times_ten); // == 60
+
+const std::array<int, 3> b{ 1, 2, 3 };
+const auto product_times_ten = [](const auto a, const auto b) { return a * b * 10; };
+
+std::transform_reduce(std::cbegin(a), std::cend(a), std::cbegin(b), 0, std::plus<>{}, product_times_ten); // == 140
+```
 
 ### Prefix sum algorithms
 Support for prefix sums (both inclusive and exclusive scans) along with transformations.
diff --git a/README.md b/README.md
index db13925..90f33cc 100644
--- a/README.md
+++ b/README.md
@@ -1224,6 +1224,15 @@ std::reduce(std::cbegin(a), std::cend(a)); // == 6
 // Using a custom binary op:
 std::reduce(std::cbegin(a), std::cend(a), 1, std::multiplies<>{}); // == 6
 ```
+Additionally you can specify transformations for reducers:
+```c++
+std::transform_reduce(std::cbegin(a), std::cend(a), 0, std::plus<>{}, times_ten); // == 60
+
+const std::array<int, 3> b{ 1, 2, 3 };
+const auto product_times_ten = [](const auto a, const auto b) { return a * b * 10; };
+
+std::transform_reduce(std::cbegin(a), std::cend(a), std::cbegin(b), 0, std::plus<>{}, product_times_ten); // == 140
+```
 
 ### Prefix sum algorithms
 Support for prefix sums (both inclusive and exclusive scans) along with transformations.