Add missing file

Author: eregon

core/proc/fixtures/refined_basic_operations.rb

@@ -0,0 +1,33 @@
+# Refines basic operations like operators and element access,
+# including Hash#[] with a String key, so specs can check
+# the specialized call paths implementations use for them.
+# Do this in a subprocess to not disable optimizations globally for the main process.
+module Operators
+  refine Integer do
+    def +(other)
+      "plus(#{self},#{other})"
+    end
+
+    def <(other)
+      "lt"
+    end
+  end
+
+  refine Array do
+    def [](i)
+      "at#{i}"
+    end
+  end
+
+  refine Hash do
+    def [](k)
+      "aref(#{k})"
+    end
+  end
+end
+
+refined = -> a, b { [a + b, a < b] }.refined(Operators)
+puts refined.call(1, 2)
+puts -> a { a[0] }.refined(Operators).call([9])
+puts -> h { h["x"] }.refined(Operators).call({ "x" => 1 })
+puts -> a, b { a + b }.call(1, 2)