From 301fa452f7a9cdea922103e9c50d85a2d5652d0d Mon Sep 17 00:00:00 2001
From: mame <mame@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 15 Jun 2018 08:53:17 +0000
Subject: Remove flip-flop usages from build scripts

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63669 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/ripper/tools/preproc.rb | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

(limited to 'ext/ripper')

diff --git a/ext/ripper/tools/preproc.rb b/ext/ripper/tools/preproc.rb
index f5d0115184..7639a901df 100755
--- a/ext/ripper/tools/preproc.rb
+++ b/ext/ripper/tools/preproc.rb
@@ -41,6 +41,7 @@ end
 
 def prelude(f, out)
   @exprs = {}
+  lex_state_def = false
   while line = f.gets
     case line
     when /\A%%/
@@ -50,19 +51,25 @@ def prelude(f, out)
       out << line.sub(/<\w+>/, '<val>')
     when /\A%type/
       out << line.sub(/<\w+>/, '<val>')
+    when /^enum lex_state_(?:bits|e) \{/
+      lex_state_def = true
+      out << line
+    when /^\}/
+      lex_state_def = false
+      out << line
     else
-      if (/^enum lex_state_(?:bits|e) \{/ =~ line)..(/^\}/ =~ line)
-        case line
-        when /^\s*(EXPR_\w+),\s+\/\*(.+)\*\//
-          @exprs[$1.chomp("_bit")] = $2.strip
-        when /^\s*(EXPR_\w+)\s+=\s+(.+)$/
-          name = $1
-          val = $2.chomp(",")
-          @exprs[name] = "equals to " + (val.start_with?("(") ? "<tt>#{val}</tt>" : "+#{val}+")
-        end
-      end
       out << line
     end
+    if lex_state_def
+      case line
+      when /^\s*(EXPR_\w+),\s+\/\*(.+)\*\//
+        @exprs[$1.chomp("_bit")] = $2.strip
+      when /^\s*(EXPR_\w+)\s+=\s+(.+)$/
+        name = $1
+        val = $2.chomp(",")
+        @exprs[name] = "equals to " + (val.start_with?("(") ? "<tt>#{val}</tt>" : "+#{val}+")
+      end
+    end
   end
 end
 
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