3 files changed, 19 insertions, 0 deletions
diff --git a/euler/include/std/fwd/allocator.hpp b/euler/include/std/fwd/allocator.hpp
new file mode 100644
index 0000000..18e14a8
--- /dev/null
+++ b/euler/include/std/fwd/allocator.hpp
@@ -0,0 +1,6 @@
+#pragma once
+
+namespace std {
+  template <class T>
+  struct allocator;
+}
diff --git a/euler/include/std/fwd/string.hpp b/euler/include/std/fwd/string.hpp
new file mode 100644
index 0000000..5e46abf
--- /dev/null
+++ b/euler/include/std/fwd/string.hpp
@@ -0,0 +1,5 @@
+#pragma once
+
+namespace std {
+  class string;
+}
diff --git a/euler/include/std/fwd/vector.hpp b/euler/include/std/fwd/vector.hpp
new file mode 100644
index 0000000..fd8fe15
--- /dev/null
+++ b/euler/include/std/fwd/vector.hpp
@@ -0,0 +1,8 @@
+#pragma once
+
+#include <std/fwd/allocator.hpp>
+
+namespace std {
+  template <class T, class Allocator = std::allocator<T>>
+  class vector;
+}