Fixed missing line in std::optional example

Sebastien Ponce · sponce · commit 19b5ef1253d7 · 2024-10-02T11:48:15.000+02:00
diff --git a/talk/morelanguage/morestl.tex b/talk/morelanguage/morestl.tex
@@ -102,6 +102,7 @@
           return in; // equiv. to optional<Phone>{in};
         return {};   // or: return std::nullopt; (empty opt.)
       }
+      auto v = parse_phone(...);
       if (v) {                    // or: v.has_value()
         process_phone(v.value()); // or: *v (unchecked)
         v->call(); // calls Phone::call()   (unchecked)

Original file line number	Diff line number	Diff line change
`@@ -102,6 +102,7 @@`
`102`	`102`	`return in; // equiv. to optional<Phone>{in};`
`103`	`103`	`return {}; // or: return std::nullopt; (empty opt.)`
`104`	`104`	`}`
	`105`	`+ auto v = parse_phone(...);`
`105`	`106`	`if (v) { // or: v.has_value()`
`106`	`107`	`process_phone(v.value()); // or: *v (unchecked)`
`107`	`108`	`v->call(); // calls Phone::call() (unchecked)`