From d3a6585330d53a1c93b2164d0872a43267f14b6f Mon Sep 17 00:00:00 2001
From: "K.Takata" <kentkt@csc.jp>
Date: Thu, 1 Dec 2016 21:32:02 +0900
Subject: [PATCH] Use raw string if a cclass contains only one character

(Issue #46)
---
 regparse.c | 28 ++++++++++++----------------
 1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/regparse.c b/regparse.c
index cda37f19..ebca4604 100644
--- a/regparse.c
+++ b/regparse.c
@@ -6084,11 +6084,10 @@ node_extended_grapheme_cluster(Node** np, ScanEnv* env)
     /* Emoji variation sequence
      * http://unicode.org/Public/emoji/4.0/emoji-zwj-sequences.txt
      */
-    np1 = node_new_cclass();
+    num1 = ONIGENC_CODE_TO_MBC(env->enc, 0xfe0f, buf);
+    if (num1 < 0) return num1;
+    np1 = node_new_str_raw(buf, buf + num1);
     if (IS_NULL(np1)) goto err;
-    cc = NCCLASS(np1);
-    r = add_code_range(&(cc->mbuf), env, 0xfe0f, 0xfe0f);
-    if (r != 0) goto err;
 
     tmp = node_new_quantifier(0, 1, 0);
     if (IS_NULL(tmp)) goto err;
@@ -6131,11 +6130,10 @@ node_extended_grapheme_cluster(Node** np, ScanEnv* env)
     alt2 = NULL;
 
     /* ZWJ */
-    np1 = node_new_cclass();
+    num1 = ONIGENC_CODE_TO_MBC(env->enc, 0x200D, buf);
+    if (num1 < 0) return num1;
+    np1 = node_new_str_raw(buf, buf + num1);
     if (IS_NULL(np1)) goto err;
-    cc = NCCLASS(np1);
-    r = add_code_range(&(cc->mbuf), env, 0x200D, 0x200D);
-    if (r != 0) goto err;
 
     tmp = node_new_list(np1, list2);
     if (IS_NULL(tmp)) goto err;
@@ -6255,11 +6253,10 @@ node_extended_grapheme_cluster(Node** np, ScanEnv* env)
     list2 = tmp;
     np1 = NULL;
 
-    np1 = node_new_cclass();
+    num1 = ONIGENC_CODE_TO_MBC(env->enc, 0x200D, buf);
+    if (num1 < 0) return num1;
+    np1 = node_new_str_raw(buf, buf + num1);
     if (IS_NULL(np1)) goto err;
-    cc = NCCLASS(np1);
-    r = add_code_range(&(cc->mbuf), env, 0x200D, 0x200D);
-    if (r != 0) goto err;
 
     tmp = node_new_list(np1, list2);
     if (IS_NULL(tmp)) goto err;
@@ -6332,11 +6329,10 @@ node_extended_grapheme_cluster(Node** np, ScanEnv* env)
     np1 = NULL;
 
     /* Prepend+ */
-    np1 = node_new_cclass();
+    num1 = ONIGENC_CODE_TO_MBC(env->enc, 0x200D, buf);
+    if (num1 < 0) return num1;
+    np1 = node_new_str_raw(buf, buf + num1);
     if (IS_NULL(np1)) goto err;
-    cc = NCCLASS(np1);
-    r = add_code_range(&(cc->mbuf), env, 0x200D, 0x200D);
-    if (r != 0) goto err;
 
     tmp = node_new_quantifier(0, 1, 0);
     if (IS_NULL(tmp)) goto err;