opal hack

2018-04-07 22:35:48 +03:00 · 2018-04-07 22:35:48 +03:00 · bf8e9e508b
commit bf8e9e508b
parent 26cf911a5c
1 changed files with 5 additions and 1 deletions
--- a/lib/risc/interpreter.rb
+++ b/lib/risc/interpreter.rb
@ -258,7 +258,11 @@ module Risc
      when :+
        left + right
      when :-
-        left - right
+        if( left.is_a?(String) or right.is_a?(String))
+          left == right ? 0 : 1       #for opal, and exception
+        else
+          left - right
+        end
      when :>>
        left / (2**right)
      when :<<