C26498

JordanMaples · web-flow · commit 6ee588aa1264 · 2020-08-18T10:04:41.000-07:00
Replacing the placeholder description and providing examples.
diff --git a/docs/code-quality/c26498.md b/docs/code-quality/c26498.md
@@ -7,4 +7,24 @@ 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. 
+
+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
+```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;
+}
+```
+
