From e77bb73a82d20c3fc89660130be32923941e3cd9 Mon Sep 17 00:00:00 2001
From: ValKmjolnir <lhk101lhk101@qq.com>
Date: Fri, 18 Feb 2022 01:58:49 +0800
Subject: [PATCH] add special character `\e`.

---
 nasal.h            |  1 +
 nasal_lexer.h      |  1 +
 test/ascii-art.nas | 25 ++++++++++++++++++++++++-
 test/lexer.nas     |  1 +
 4 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/nasal.h b/nasal.h
index b9505c8..2995dcb 100644
--- a/nasal.h
+++ b/nasal.h
@@ -117,6 +117,7 @@ std::string rawstr(const std::string& str)
         {
             case '\a': ret+="\\a";break;
             case '\b': ret+="\\b";break;
+            case '\e': ret+="\\e";break;
             case '\f': ret+="\\f";break;
             case '\n': ret+="\\n";break;
             case '\r': ret+="\\r";break;
diff --git a/nasal_lexer.h b/nasal_lexer.h
index b0c305f..592eb9c 100644
--- a/nasal_lexer.h
+++ b/nasal_lexer.h
@@ -239,6 +239,7 @@ std::string nasal_lexer::str_gen()
                 case '0': str+='\0';    break;
                 case 'a': str+='\a';    break;
                 case 'b': str+='\b';    break;
+                case 'e': str+='\e';    break;
                 case 't': str+='\t';    break;
                 case 'n': str+='\n';    break;
                 case 'v': str+='\v';    break;
diff --git a/test/ascii-art.nas b/test/ascii-art.nas
index 1b087e0..0c7d302 100644
--- a/test/ascii-art.nas
+++ b/test/ascii-art.nas
@@ -114,10 +114,33 @@ var curve4=func()
     }
     return;
 }
+var curve5=func(){
+    var a=[];
+    for(var i=0;i<10;i+=1)
+        append(a,"\e["~split(".",str(i))[0]~"mh \e[0m");
+    for(var i=30;i<38;i+=1)
+        append(a,"\e["~split(".",str(i))[0]~"mh \e[0m");
+    for(var i=40;i<48;i+=1)
+        append(a,"\e["~split(".",str(i))[0]~"mh \e[0m");
+    for(var i=90;i<98;i+=1)
+        append(a,"\e["~split(".",str(i))[0]~"mh \e[0m");
+    for(var i=100;i<108;i+=1)
+        append(a,"\e["~split(".",str(i))[0]~"mh \e[0m");
+    var s=0;
+    foreach(var i;a){
+        print(i,s==3?"\n":"");
+        if(s==3)
+            s=0;
+        else
+            s+=1;
+    }
+    print('\n');
+}
 trans_ttf("just for test");
 trans_ttf(" ValKmjolnir ");
 trans_ttf("just for fun");
 curve1();
 curve2();
 curve3();
-curve4();
\ No newline at end of file
+curve4();
+curve5();
\ No newline at end of file
diff --git a/test/lexer.nas b/test/lexer.nas
index 77962b4..38b6245 100644
--- a/test/lexer.nas
+++ b/test/lexer.nas
@@ -43,6 +43,7 @@ var lexer=func(file)
                     var c=chr(s[ptr]);
                     if   (c=='a' ) str~='\a';
                     elsif(c=='b' ) str~='\b';
+                    elsif(c=='e' ) str~='\e';
                     elsif(c=='f' ) str~='\f';
                     elsif(c=='n' ) str~='\n';
                     elsif(c=='r' ) str~='\r';