Merge pull request MicrosoftDocs#2375 from JordanMaples/patch-4

Colin Robertson · web-flow · commit e65e3df3304a · 2020-08-18T17:17:10.000-07:00
C26498 - Description &amp; Examples
diff --git a/docs/code-quality/c26498.md b/docs/code-quality/c26498.md
@@ -1,10 +1,35 @@
 ---
 title: C26498
-ms.date: 03/22/2018
+ms.date: 08/18/2020
 ms.topic: reference
 f1_keywords: ["C26498"]
 helpviewer_keywords: ["C26498"]
 ---
 # C26498 USE_CONSTEXPR_FOR_FUNCTIONCALL
 
-This function call %function% can use `constexpr` if compile-time evaluation is desired. See [C++ Core Guidelines con.5](https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#Rconst-constexpr).
+This rule helps to enforce Con.5 from the [C++ Core Guidelines](https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#con5-use-constexpr-for-values-that-can-be-computed-at-compile-time): use constexpr for values that can be computed at compile time. 
+
+## Remarks
+
+The warning is triggered by assigning the result of a **`constexpr`** function to any non-**`constexpr`** variable whose value doesn't change after the initial assignment.
+
+## Example
+
+This sample code shows where C26498 may appear, and how to avoid it:
+
+```cpp
+constexpr int getMyValue()
+{
+    return 1;
+}
+
+void foo()
+{
+    constexpr int val0 = getMyValue(); // no C26498
+    const int val1 = getMyValue();     // C26498, C26814
+    int val2 = getMyValue();           // C26498, value is never modified
+    int val3 = getMyValue();           // no C26498, val3 is assigned to below.
+    val3 = val3 * val2;
+}
+```
+
