Use instance_exec instead of instance_eval for assigning default values

Author: nepalez

lib/dry/initializer/option.rb

@@ -51,7 +51,7 @@ def safe_default
 
     def default_part
       if default
-        " { instance_eval(&__defaults__[:'option_#{source}']) }"
+        " { instance_exec(&__defaults__[:'option_#{source}']) }"
       elsif !optional
         " { raise ArgumentError, \"option :'#{source}' is required\" }"
       end

lib/dry/initializer/param.rb

@@ -45,7 +45,7 @@ def maybe_default
     def default_part
       return unless default
       " == Dry::Initializer::UNDEFINED ?" \
-      " instance_eval(&__defaults__[:param_#{target}]) :" \
+      " instance_exec(&__defaults__[:param_#{target}]) :" \
       " #{target}"
     end
   end

spec/default_nil_spec.rb

@@ -4,7 +4,7 @@ class Test::Foo
       extend Dry::Initializer::Mixin
 
       param :foo, default: proc { nil }
-      param :bar, default: proc { nil }
+      param :bar, default: -> { nil }
     end
   end
 

spec/default_values_spec.rb

@@ -5,9 +5,9 @@ class Test::Foo
 
       param  :foo, default: proc { :FOO }
       param  :bar, default: proc { :BAR }
-      option :baz, default: proc { :BAZ }
+      option :baz, default: -> { :BAZ }
       option :qux, default: proc { foo }
-      option :mox, default: proc { default_mox }
+      option :mox, default: -> { default_mox }
 
       private