Merge pull request #1 from crupest/minmax-layout

Min max layout support.

1 files changed, 28 insertions, 0 deletions

diff --git a/src/base.h b/src/base.h
index c8866cf6..9b3b50a1 100644
--- a/src/base.h
+++ b/src/base.h
@@ -10,6 +10,7 @@
 #include <memory>
 #include <string_view>
 #include <chrono>
+#include <optional>
 
 namespace cru
 {
@@ -63,4 +64,31 @@ namespace cru
         if (!condition)
             throw std::invalid_argument(error_message.data());
     }
+
+    template <typename T, typename = std::enable_if_t<std::is_arithmetic_v<T>>>
+    float Coerce(const T n, const std::optional<T> min, const std::optional<T> max)
+    {
+        if (min.has_value() && n < min.value())
+            return min.value();
+        if (max.has_value() && n > max.value())
+            return max.value();
+        return n;
+    }
+
+    template <typename T, typename = std::enable_if_t<std::is_arithmetic_v<T>>>
+    float Coerce(const T n, const std::nullopt_t, const std::optional<T> max)
+    {
+        if (max.has_value() && n > max.value())
+            return max.value();
+        return n;
+    }
+
+    template <typename T, typename = std::enable_if_t<std::is_arithmetic_v<T>>>
+    float Coerce(const T n, const std::optional<T> min, const std::nullopt_t)
+    {
+        if (min.has_value() && n < min.value())
+            return min.value();
+        return n;
+    }
+
 }