add support for unary plus/minus

2026-03-16 14:35:49 +03:00
parent 3f0f8ab5e7
commit 8a59e0a57f
2 changed files with 44 additions and 37 deletions
--- a/lib/ruby_algebra/expression.rb
+++ b/lib/ruby_algebra/expression.rb
@@ -151,23 +151,6 @@ module RubyAlgebra
    end
  end

-  class Subtraction < Addition
-    attr_reader :lhs, :rhs
-
-    def to_s
-      need_parentheses_left = lhs.op_priority < op_priority || (lhs.op_priority == op_priority && op_assoc_type == :right)
-      need_parentheses_right = rhs.op_priority < op_priority || (rhs.op_priority == op_priority && op_assoc_type == :left)
-
-      result = need_parentheses_left ? "(#{lhs}) - " : "#{lhs} - "
-      result + (need_parentheses_right ? "(#{rhs})" : rhs.to_s)
-    end
-
-    def type
-      :sub
-    end
-
-  end
-
  class Constant < Expression
    attr_reader :value