Fix EndWithMatcher compile errors

src/spectator/matchers/end_with_matcher.cr

@@ -7,7 +7,11 @@ module Spectator::Matchers
   struct EndWithMatcher(ExpectedType) < ValueMatcher(ExpectedType)
     # Determines whether the matcher is satisfied with the value given to it.
     private def match?(actual)
-      compare_method(actual, &.eval(actual, expected))
+      if actual.responds_to?(:ends_with?)
+        actual.ends_with?(expected)
+      else
+        expected === actual.last
+      end
     end
 
     # Determines whether the matcher is satisfied with the partial given to it.
@@ -17,23 +21,6 @@ module Spectator::Matchers
       MatchData.new(match?(values.actual), values)
     end
 
-    # Returns the method that should be used for comparison.
-    # Call `eval(actual, expected)` on the returned value.
-    private macro compare_method(actual, &block)
-      # If the actual type defines `ends_with?`,
-      # then use that for the comparison.
-      # Otherwise, treat the actual type as an `Indexable`,
-      # and retrieve the last value to compare with.
-      # FIXME: Is there a better way to do this?
-      if {{actual}}.responds_to?(:ends_with?)
-        {{block.args.first}} = EndsWithCompareMethod.new
-        {{block.body}}
-      else
-        {{block.args.first}} = IndexableCompareMethod.new
-        {{block.body}}
-      end
-    end
-
     # Match data specific to this matcher.
     private struct MatchData(ExpectedType, ActualType) < MatchData
       # Creates the match data.
@@ -52,41 +39,21 @@ module Spectator::Matchers
       # Describes the condition that satisfies the matcher.
       # This is informational and displayed to the end-user.
       def message
-        method_string = compare_method(partial.actual, &.to_s)
-        "#{values.actual_label} ends with #{values.expected_label} (using #{method_string})"
+        "#{@values.actual_label} ends with #{@values.expected_label} (using #{comparison_method})"
       end
 
       # Describes the condition that won't satsify the matcher.
       # This is informational and displayed to the end-user.
       def negated_message
-        method_string = compare_method(partial.actual, &.to_s)
-        "#{values.actual_label} does not end with #{values.expected_label} (using #{method_string})"
-      end
-    end
-
-    # Comparison method for types that define the `ends_with?` method.
-    private struct EndsWithCompareMethod
-      # Evaluates the condition to determine whether the matcher is satisfied.
-      def eval(actual, expected)
-        actual.ends_with?(expected)
+        "#{@values.actual_label} does not end with #{@values.expected_label} (using #{comparison_method})"
       end
 
-      # String representation for end-user output.
-      def to_s
-        "#ends_with?"
-      end
-    end
-
-    # Comparison method for `Indexable` types.
-    private struct IndexableCompareMethod
-      # Evaluates the condition to determine whether the matcher is satisfied.
-      def eval(actual, expected)
-        expected === actual.last
-      end
-
-      # String representation for end-user output.
-      def to_s
-        "expected === actual.last"
+      private def comparison_method
+        if @values.actual.responds_to?(:ends_with?)
+          "#ends_with?"
+        else
+          "expected === actual.last"
+        end
       end
     end
   end