finished 206, 207

1 files changed, 6 insertions, 0 deletions

diff --git a/libprakpp/include/prakcommon.hpp b/libprakpp/include/prakcommon.hpp
index 074e290..dcafecf 100644
--- a/libprakpp/include/prakcommon.hpp
+++ b/libprakpp/include/prakcommon.hpp
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <cstddef>
+#include <cstdint>
 #include <cmath>
 #include <functional>
 #include <vector>
@@ -132,3 +134,7 @@ template <typename T> struct pvalue<T> operator-(const T &a, const struct pvalue
 template <typename T> std::ostream &operator<<(std::ostream &os, const struct pvalue<T> &p) { return os << p.val << "±" << p.err; }
 
 } // namespace prak
+
+namespace std {
+template <typename T> struct prak::pvalue<T> abs(const struct prak::pvalue<T> &p) { return {abs(p.val), abs(p.err)}; }
+}