1 files changed, 27 insertions, 0 deletions
diff --git a/lib/pry/config/lazy_value.rb b/lib/pry/config/lazy_value.rb
new file mode 100644
index 00000000..8c2330ac
--- /dev/null
+++ b/lib/pry/config/lazy_value.rb
@@ -0,0 +1,27 @@
+class Pry
+  class Config
+    # LazyValue is a Proc (block) wrapper. It is meant to be used as a
+    # configuration value. Subsequent `#call` calls always evaluate the given
+    # block.
+    #
+    # @example
+    #   num = 19
+    #   value = Pry::Config::LazyValue.new { num += 1 }
+    #   value.foo # => 20
+    #   value.foo # => 21
+    #   value.foo # => 22
+    #
+    # @api private
+    # @since ?.?.?
+    # @see Pry::Config::MemoizedValue
+    class LazyValue
+      def initialize(&block)
+        @block = block
+      end
+
+      def call
+        @block.call
+      end
+    end
+  end
+end