Create core

lib/chervil.rb

@@ -1,4 +1,5 @@
 require 'chervil/ast'
+require 'chervil/core'
 require 'chervil/env'
 require 'chervil/interpreter'
 require 'chervil/lexer'

lib/chervil/core.rb

@@ -0,0 +1,10 @@
+module Chervil
+  module Core
+    CORE = {
+      "+" => Proc.new { |*args| args.inject(:+) },
+      "-" => Proc.new { |*args| args.inject(:-) },
+      "*" => Proc.new { |*args| args.inject(:*) },
+      "/" => Proc.new { |*args| args.inject(:/) },
+    }
+  end
+end