From 34387d1a0273329ec0c9cf02c098b12552f4302b Mon Sep 17 00:00:00 2001
From: usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 28 Jan 2008 18:04:39 +0000
Subject: [PATCH] 	* parse.y (reg_fragment_setenc_gen): US-ASCII script
 special code.

	* parse.y (reg_fragment_check_len, reg_compile_gen): no need such
	  trick.
	  [ruby-dev:33399]

	* test/ruby/test_m17n.rb (test_regexp_usacii_literal): add tests.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15304 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog              | 10 ++++++++++
 parse.y                | 17 +++++++++--------
 test/ruby/test_m17n.rb | 37 +++++++++++++++++++++++++++++++++++++
 3 files changed, 56 insertions(+), 8 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 46cded4c9c..903ba805ca 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+Tue Jan 29 03:01:29 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* parse.y (reg_fragment_setenc_gen): US-ASCII script special code.
+
+	* parse.y (reg_fragment_check_len, reg_compile_gen): no need such
+	  trick.
+	  [ruby-dev:33399]
+
+	* test/ruby/test_m17n.rb (test_regexp_usacii_literal): add tests.
+
 Tue Jan 29 01:38:02 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* common.mk ($(srcdir)/revision.h): no need to show ifchange execution
diff --git a/parse.y b/parse.y
index a6fed50670..3718d99a2b 100644
--- a/parse.y
+++ b/parse.y
@@ -8501,6 +8501,15 @@ reg_fragment_setenc_gen(struct parser_params* parser, VALUE str, int options)
         }
 	rb_enc_associate(str, rb_ascii8bit_encoding());
     }
+    else if (parser->enc == rb_usascii_encoding()) {
+	if (rb_enc_str_coderange(str) != ENC_CODERANGE_7BIT) {
+	    /* raise in re.c */
+	    rb_enc_associate(str, rb_usascii_encoding());
+	}
+	else {
+	    rb_enc_associate(str, rb_ascii8bit_encoding());
+	}
+    }
     return;
 
 error:
@@ -8513,10 +8522,6 @@ static void
 reg_fragment_check_gen(struct parser_params* parser, VALUE str, int options)
 {
     VALUE err;
-    if (!RE_OPTION_ENCODING_IDX(options) &&
-	parser->enc == rb_usascii_encoding()) {
-	options |= RE_OPTION_ARG_ENCODING_NONE;
-    }
     reg_fragment_setenc_gen(parser, str, options);
     err = rb_reg_check_preprocess(str);
     if (err != Qnil) {
@@ -8610,10 +8615,6 @@ reg_compile_gen(struct parser_params* parser, VALUE str, int options)
 {
     VALUE re;
 
-    if (!RE_OPTION_ENCODING_IDX(options) &&
-	parser->enc == rb_usascii_encoding()) {
-	options |= RE_OPTION_ARG_ENCODING_NONE;
-    }
     reg_fragment_setenc(str, options);
     re = rb_reg_compile(str, options & RE_OPTION_MASK);
     if (NIL_P(re)) {
diff --git a/test/ruby/test_m17n.rb b/test/ruby/test_m17n.rb
index c9d7d8f46e..056f4f3df5 100644
--- a/test/ruby/test_m17n.rb
+++ b/test/ruby/test_m17n.rb
@@ -78,6 +78,15 @@ class TestM17N < Test::Unit::TestCase
     assert_regexp_fixed_encoding(r)
   end
 
+  def assert_regexp_usascii_literal(r, enc, ex = nil)
+    code = "# -*- encoding: US-ASCII -*-\n#{r}.encoding"
+    if ex
+      assert_raise(ex) { eval(code) }
+    else
+      assert_equal(enc, eval(code))
+    end
+  end
+
   def encdump(str)
     d = str.dump
     if /\.force_encoding\("[A-Za-z0-9.:_+-]*"\)\z/ =~ d
@@ -1045,4 +1054,32 @@ class TestM17N < Test::Unit::TestCase
     assert_equal(Encoding::US_ASCII, eval("# -*- encoding: US-ASCII -*-\n__ENCODING__".force_encoding("ASCII-8BIT")))
     assert_equal(Encoding::ASCII_8BIT, eval("# -*- encoding: ASCII-8BIT -*-\n__ENCODING__".force_encoding("US-ASCII")))
   end
+
+  def test_regexp_usascii
+    assert_regexp_usascii_literal('//', Encoding::US_ASCII)
+    assert_regexp_usascii_literal('/#{}/', Encoding::US_ASCII)
+    assert_regexp_usascii_literal('/#{"a"}/', Encoding::US_ASCII)
+    assert_regexp_usascii_literal('/#{%q"\x80"}/', Encoding::ASCII_8BIT)
+    assert_regexp_usascii_literal('/#{"\x80"}/', nil, SyntaxError)
+
+    assert_regexp_usascii_literal('/a/', Encoding::US_ASCII)
+    assert_regexp_usascii_literal('/a#{}/', Encoding::US_ASCII)
+    assert_regexp_usascii_literal('/a#{"a"}/', Encoding::US_ASCII)
+    assert_regexp_usascii_literal('/a#{%q"\x80"}/', Encoding::ASCII_8BIT)
+    assert_regexp_usascii_literal('/a#{"\x80"}/', nil, SyntaxError)
+
+    assert_regexp_usascii_literal('/\x80/', Encoding::ASCII_8BIT)
+    assert_regexp_usascii_literal('/\x80#{}/', Encoding::ASCII_8BIT)
+    assert_regexp_usascii_literal('/\x80#{"a"}/', Encoding::ASCII_8BIT)
+    assert_regexp_usascii_literal('/\x80#{%q"\x80"}/', Encoding::ASCII_8BIT)
+    assert_regexp_usascii_literal('/\x80#{"\x80"}/', nil, SyntaxError)
+
+    assert_regexp_usascii_literal('/\u1234/', Encoding::UTF_8)
+    assert_regexp_usascii_literal('/\u1234#{}/', Encoding::UTF_8)
+    assert_regexp_usascii_literal('/\u1234#{"a"}/', Encoding::UTF_8)
+    assert_regexp_usascii_literal('/\u1234#{%q"\x80"}/', nil, SyntaxError)
+    assert_regexp_usascii_literal('/\u1234#{"\x80"}/', nil, SyntaxError)
+    assert_regexp_usascii_literal('/\u1234\x80/', nil, SyntaxError)
+    assert_regexp_usascii_literal('/\u1234#{}\x80/', nil, RegexpError)
+  end
 end