Explain a Glaceon-confounding code decision

ISSOtm · Dec 10, 2023 · 3220b1b · 3220b1b
1 parent c5b43bd
commit 3220b1b
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/link/script.y b/src/link/script.y
@@ -112,6 +112,8 @@ void yy::parser::error(std::string const &msg) {
 }
 
 static void includeFile(std::string &&path) {
+	// `emplace_back` can invalidate references to the stack's elements!
+	// This is why `newContext` must be gotten before `prevContext`.
 	auto &newContext = lexerStack.emplace_back(std::move(path));
 	auto &prevContext = lexerStack[lexerStack.size() - 2];