Create If Any pattern from negative Integer.

brixen · Nov 6, 2010 · 888bd88 · 888bd88
1 parent c948322
commit 888bd88
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Showing 2 changed files with 9 additions and 1 deletion.
diff --git a/lib/pegarus/ast/pattern.rb b/lib/pegarus/ast/pattern.rb
@@ -6,7 +6,9 @@ def pattern(spec)
     when Array
       Set.new spec
     when Integer
-      Any.new spec
+      node = Any.new spec.abs
+      node = If.new node if spec < 0
+      node
     when String
       Character.new spec
     when Pattern

diff --git a/spec/ast/pattern_spec.rb b/spec/ast/pattern_spec.rb
@@ -5,6 +5,12 @@
     Pegarus.pattern(5).should be_an_instance_of(Pegarus::Any)
   end
 
+  it "returns an If Any pattern when passed a negative Integer" do
+    pat = Pegarus.pattern(-1)
+    pat.should be_an_instance_of(Pegarus::If)
+    pat.pattern.should be_an_instance_of(Pegarus::Any)
+  end
+
   it "returns an Character pattern when passed a String" do
     Pegarus.pattern("abc").should be_an_instance_of(Pegarus::Character)
   end