Expect escaped backslashes in expressions to inspect

Author: valich

lib/ruby-debug-ide/command.rb

@@ -108,8 +108,8 @@ def timeout(sec)
     def debug_eval(str, b = get_binding)
       begin
         str = str.to_s
+        to_inspect = unescape_incoming(str)
         max_time = Debugger.evaluation_timeout
-        to_inspect = str.gsub(/\\n/, "\n")
         @printer.print_debug("Evaluating #{str} with timeout after %i sec", max_time)
         timeout(max_time) do
           eval(to_inspect, b)
@@ -120,6 +120,11 @@ def debug_eval(str, b = get_binding)
       end
     end
 
+    def unescape_incoming(str)
+        str.gsub(/(?<backsl_escapes>(?:^|[^\\])(?:\\\\)*)\\n/, "\\k<backsl_escapes>\n")
+           .gsub(/\\\\/, '\\')
+    end
+
     def debug_silent_eval(str)
       begin
         str = str.to_s

lib/ruby-debug-ide/commands/expression_info.rb

@@ -9,7 +9,7 @@ def regexp
     end
 
     def execute
-      string_to_parse = @match.post_match.gsub("\\n", "\n") + "\n\n\n"
+      string_to_parse = unescape_incoming(@match.post_match) + "\n\n\n"
       total_lines = string_to_parse.count("\n") + 1
 
       lexer = RubyLex.new

test-base/inspect_test.rb

@@ -68,5 +68,25 @@ def test_inspect_multiline_expression
     send_cont
   end
 
+  def test_inspect_escaping_escaped_newlines
+    create_socket ["sleep 0.1"]
+    run_to_line(1)
+
+    send_ruby('v inspect "\\\\n".size')
+    variable = read_variables
+    assert_equal(1, variables.length, "There is one variable returned.")
+    assert_equal(1, variables[0].value, "There is one char (newline)")
+
+    send_ruby('v inspect "\\\\\\n".size')
+    variable = read_variables
+    assert_equal(1, variables.length, "There is one variable returned.")
+    assert_equal(0, variables[0].value, "There are no chars, it's line continuation here")
+
+    send_ruby('v inspect "\\\\\\\\\\n".size')
+    variable = read_variables
+    assert_equal(1, variables.length, "There is one variable returned.")
+    assert_equal(2, variables[0].value, "There are two chars: escaped backslash and newline")
+  end
+
 end