diff --git a/lib/regexrules.js b/lib/regexrules.js
index e0c154a..01fd1d5 100644
--- a/lib/regexrules.js
+++ b/lib/regexrules.js
@@ -1,87 +1,145 @@
 
+var
+  SP = '[ \\t]',
+  NL_OPTIONAL = '(?:' + SP + '*\\n)?',
+  NLS_OPTIONAL = '(?:' + SP + '*\\n+)?',
+  IND = '^(.*?)', // indent (all cols from 0 col)
+
+  ARGS = SP + '+(.+?)', // require separator(SPs)
+  ARGS_OPTIONAL = '(?:' + ARGS + ')?',
+  FUNC = ARGS + SP + '*\\((.*)\\)', // Not `\\((.*?)\\)`
+
+  // ======================== html
+  HTML_START = '<!--' + SP + '*', // include inside SPs
+  HTML_SP_START = SP + '*' + HTML_START,
+  HTML_IND_START = IND + HTML_START,
+  HTML_END = SP + '*(?:-->|!>)', // include inside SPs
+  HTML_END_NL = HTML_END + NL_OPTIONAL,
+  HTML_END_NLS = HTML_END + NLS_OPTIONAL,
+
+  // ======================== js
+  _JS_START1 = '//',
+  _JS_START2 = '/\\*',
+  JS_START1 = _JS_START1 + SP + '*', // include inside SPs
+  JS_START2 = _JS_START2 + SP + '*', // include inside SPs
+  JS_START = '(?:' + _JS_START1 + '|' + _JS_START2 + ')' + SP + '*', // include inside SPs
+  JS_SP_START = SP + '*' + JS_START,
+  JS_IND_START1 = IND + JS_START1,
+  JS_IND_START2 = IND + JS_START2,
+  JS_END_LINE = SP + '*(?:\\*\\*|\\*/|$)', // include inside SPs
+  _JS_END = '(?:\\*\\*|\\*/)',
+  JS_END = SP + '*' + _JS_END, // include inside SPs
+  JS_END_NL = SP + '*(?:' + _JS_END + NL_OPTIONAL + '|(?:\\n|$))', // include inside SPs
+  JS_END_NLS = SP + '*(?:' + _JS_END + NLS_OPTIONAL + '|(?:\\n+|$))', // include inside SPs
+
+  // ======================== coffee
+  COFFEE_START = '#+' + SP + '*', // include inside SPs
+  COFFEE_SP_START = SP + '*' + COFFEE_START,
+  COFFEE_IND_START = IND + COFFEE_START,
+  COFFEE_END_LINE = SP + '*$', // include inside SPs
+  COFFEE_END_NL = SP + '*(?:\\n|$)', // include inside SPs
+  COFFEE_END_NLS = SP + '*(?:\\n+|$)', // include inside SPs
+
+  // ======================== directives
+  DIR_ECHO =              '@echo' + ARGS,
+  DIR_EXEC =              '@exec' + FUNC,
+  DIR_INCLUDE =           '@include(?!-)' + ARGS,
+  DIR_INCLUDE_STATIC =    '@include-static' + ARGS,
+  DIR_EXCLUDE_START =     '@exclude' + ARGS_OPTIONAL,
+  DIR_EXCLUDE_END =       '@endexclude',
+  DIR_EXTEND_START =      '@extend(?!able)' + ARGS,
+  DIR_EXTEND_END =        '@endextend',
+  DIR_EXTENDABLE =        '@extendable',
+  DIR_IF_START =          '@(ifndef|ifdef|if)' + ARGS,
+  DIR_IF_END =            '@endif',
+  DIR_FOREACH_START =     '@foreach' + ARGS,
+  DIR_FOREACH_END =       '@endfor'
+  ;
+
 module.exports = {
   simple : {
-    echo : "^@echo[ \t]+(.*?)[ \t]*$",
-    exec : "^@exec[ \t]+(\\S+)[ \t]*\\((.*)\\)[ \t]*$",
-    include          : "^(.*)@include(?!-)[ \t]+(.*?)[ \t]*$", // allow prefix characters to specify the indent level of included file
-    'include-static' : "^(.*)@include-static[ \t]+(.*?)[ \t]*$"
+    echo :              '^' +                   DIR_ECHO +              SP + '*$',
+    exec :              '^' +                   DIR_EXEC +              SP + '*$',
+    include :           IND +                   DIR_INCLUDE +           SP + '*$',
+          // allow prefix characters to specify the indent level of included file
+    'include-static' :  IND +                   DIR_INCLUDE_STATIC +    SP + '*$'
   },
   html : {
-    echo : "<!--[ \t]*@echo[ \t]+(.*?)[ \t]*(?:-->|!>)",
-    exec : "<!--[ \t]*@exec[ \t]+(\\S+)[ \t]*\\((.*)\\)[ \t]*(?:-->|!>)",
-    include          : "(.*)<!--[ \t]*@include(?!-)[ \t]+(.*?)[ \t]*(?:-->|!>)",
-    'include-static' : "(.*)<!--[ \t]*@include-static[ \t]+(.*?)[ \t]*(?:-->|!>)",
+    echo :              HTML_START +            DIR_ECHO +              HTML_END,
+    exec :              HTML_START +            DIR_EXEC +              HTML_END,
+    include :           HTML_IND_START +        DIR_INCLUDE +           HTML_END,
+    'include-static' :  HTML_IND_START +        DIR_INCLUDE_STATIC +    HTML_END,
     exclude : {
-      start : "[ \t]*<!--[ \t]*@exclude(?:[ \t]+(.*?))?[ \t]*(?:-->|!>)(?:[ \t]*\n+)?",
-      end   : "[ \t]*<!--[ \t]*@endexclude[ \t]*(?:-->|!>)(?:[ \t]*\n)?"
+      start :           HTML_SP_START +         DIR_EXCLUDE_START +     HTML_END_NLS,
+      end   :           HTML_SP_START +         DIR_EXCLUDE_END +       HTML_END_NL
     },
     extend : {
-      start : "[ \t]*<!--[ \t]*@extend(?!able)[ \t]+(.*?)[ \t]*(?:-->|!>)(?:[ \t]*\n+)?",
-      end   : "[ \t]*<!--[ \t]*@endextend[ \t]*(?:-->|!>)(?:[ \t]*\n)?"
+      start :           HTML_SP_START +         DIR_EXTEND_START +      HTML_END_NLS,
+      end   :           HTML_SP_START +         DIR_EXTEND_END +        HTML_END_NL
     },
-    extendable : "<!--[ \t]*@extendable[ \t]*(?:-->|!>)",
+    extendable :        HTML_SP_START +         DIR_EXTENDABLE +        HTML_END,
     if : {
-      start : "[ \t]*<!--[ \t]*@(ifndef|ifdef|if)[ \t]+(.*?)[ \t]*(?:-->|!>)(?:[ \t]*\n+)?",
-      end   : "[ \t]*<!(?:--)?[ \t]*@endif[ \t]*(?:-->|!>)(?:[ \t]*\n)?"
+      start :           HTML_SP_START +         DIR_IF_START +          HTML_END_NLS,
+      end   :           HTML_SP_START +         DIR_IF_END +            HTML_END_NL
     },
     foreach : {
-      start : "[ \t]*<!--[ \t]*@foreach[ \t]+(.*?)[ \t]*(?:-->|!>)(?:[ \t]*\n+)?",
-      end   : "[ \t]*<!(?:--)?[ \t]*@endfor[ \t]*(?:-->|!>)(?:[ \t]*\n)?"
+      start :           HTML_SP_START +         DIR_FOREACH_START +     HTML_END_NLS,
+      end   :           HTML_SP_START +         DIR_FOREACH_END +       HTML_END_NL
     }
   },
   js : {
     echo : [
-      "/\\*[ \t]*@echo[ \t]+(.*?)[ \t]*\\*(?:\\*|/)",
-      "//[ \t]*@echo[ \t]+(.*?)[ \t]*$"
+                        JS_START1 +             DIR_ECHO +              JS_END_LINE,
+                        JS_START2 +             DIR_ECHO +              JS_END_LINE
     ],
-    exec : "(?://|/\\*)[ \t]*@exec[ \t]+(\\S+)[ \t]*\\((.*)\\)[ \t]*(?:\\*(?:\\*|/))?",
+    exec :              JS_START +              DIR_EXEC +              JS_END_LINE,
     include : [
-      "^(.*)/\\*[ \t]*@include(?!-)[ \t]+(.*?)[ \t]*\\*(?:\\*|/)",
-      "^(.*)//[ \t]*@include(?!-)[ \t]+(.*?)[ \t]*$"
+                        JS_IND_START1 +         DIR_INCLUDE +           JS_END_LINE,
+                        JS_IND_START2 +         DIR_INCLUDE +           JS_END_LINE
     ],
-    'include-static': [
-      "^(.*)/\\*[ \t]*@include-static[ \t]+(.*?)[ \t]*\\*(?:\\*|/)",
-      "^(.*)//[ \t]*@include-static[ \t]+(.*?)[ \t]*$"
+    'include-static' : [
+                        JS_IND_START1 +         DIR_INCLUDE_STATIC +    JS_END_LINE,
+                        JS_IND_START2 +         DIR_INCLUDE_STATIC +    JS_END_LINE
     ],
     exclude : {
-      start : "[ \t]*(?://|/\\*)[ \t]*@exclude(?:[ \t]+([^\n*]*))?[ \t]*(?:\\*(?:\\*|/))?(?:[ \t]*\n+)?",
-      end   : "[ \t]*(?://|/\\*)[ \t]*@endexclude[ \t]*(?:\\*(?:\\*|/))?(?:[ \t]*\n)?"
+      start :           JS_SP_START +           DIR_EXCLUDE_START +     JS_END_NLS,
+      end   :           JS_SP_START +           DIR_EXCLUDE_END +       JS_END_NL
     },
     extend : {
-      start : "[ \t]*(?://|/\\*)[ \t]*@extend(?!able)[ \t]+([^\n*]*)(?:\\*(?:\\*|/))?(?:[ \t]*\n+)?",
-      end   : "[ \t]*(?://|/\\*)[ \t]*@endextend[ \t]*(?:\\*(?:\\*|/))?(?:[ \t]*\n)?"
+      start :           JS_SP_START +           DIR_EXTEND_START +      JS_END_NLS,
+      end   :           JS_SP_START +           DIR_EXTEND_END +        JS_END_NL
     },
-    extendable : "[ \t]*(?://|/\\*)[ \t]*@extendable[ \t]*(?:\\*/)?",
+    extendable :        JS_SP_START +           DIR_EXTENDABLE +        JS_END_LINE,
     if : {
-      start : "[ \t]*(?://|/\\*)[ \t]*@(ifndef|ifdef|if)[ \t]+([^\n*]*)(?:\\*(?:\\*|/))?(?:[ \t]*\n+)?",
-      end   : "[ \t]*(?://|/\\*)[ \t]*@endif[ \t]*(?:\\*(?:\\*|/))?(?:[ \t]*\n)?"
+      start :           JS_SP_START +           DIR_IF_START +          JS_END_NLS,
+      end   :           JS_SP_START +           DIR_IF_END +            JS_END_NL
     },
     foreach : {
-      start : "[ \t]*(?://|/\\*)[ \t]*@foreach[ \t]+([^\n*]*)(?:\\*(?:\\*|/))?(?:[ \t]*\n+)?",
-      end   : "[ \t]*(?://|/\\*)[ \t]*@endfor[ \t]*(?:\\*(?:\\*|/))?(?:[ \t]*\n)?"
+      start :           JS_SP_START +           DIR_FOREACH_START +     JS_END_NLS,
+      end   :           JS_SP_START +           DIR_FOREACH_END +       JS_END_NL
     }
   },
   coffee : {
-    echo : "#+[ \t]*@echo[ \t]+(.*?)[ \t]*$",
-    exec : "#+[ \t]*@exec[ \t]+(\\S+)[ \t]*\\((.*)\\)[ \t]*$",
-    include          : "^(.*?)#+[ \t]*@include(?!-)[ \t]+(.*?)[ \t]*$",
-    'include-static' : "^(.*?)#+[ \t]*@include-static[ \t]+(.*?)[ \t]*$",
+    echo :              COFFEE_START +          DIR_ECHO +              COFFEE_END_LINE,
+    exec :              COFFEE_START +          DIR_EXEC +              COFFEE_END_LINE,
+    include :           COFFEE_IND_START +      DIR_INCLUDE +           COFFEE_END_LINE,
+    'include-static' :  COFFEE_IND_START +      DIR_INCLUDE_STATIC +    COFFEE_END_LINE,
     exclude : {
-      start : "^[ \t]*#+[ \t]*@exclude(?:[ \t]+(.*?))?[ \t]*\n+",
-      end   : "^[ \t]*#+[ \t]*@endexclude[ \t]*\n?"
+      start :           COFFEE_SP_START +       DIR_EXCLUDE_START +     COFFEE_END_NLS,
+      end   :           COFFEE_SP_START +       DIR_EXCLUDE_END +       COFFEE_END_NL
     },
     extend : {
-      start : "^[ \t]*#+[ \t]*@extend(?!able)[ \t]+(.*?)\n+",
-      end   : "^[ \t]*#+[ \t]*@endextend[ \t]*\n?"
+      start :           COFFEE_SP_START +       DIR_EXTEND_START +      COFFEE_END_NLS,
+      end   :           COFFEE_SP_START +       DIR_EXTEND_END +        COFFEE_END_NL
     },
-    extendable : "^[ \t]*#+[ \t]*@extendable[ \t]*$",
+    extendable :        COFFEE_SP_START +       DIR_EXTENDABLE +        COFFEE_END_LINE,
     if : {
-      start : "^[ \t]*#+[ \t]*@(ifndef|ifdef|if)[ \t]+(.*?)[ \t]*\n+",
-      end   : "^[ \t]*#+[ \t]*@endif[ \t]*\n?"
+      start :           COFFEE_SP_START +       DIR_IF_START +          COFFEE_END_NLS,
+      end   :           COFFEE_SP_START +       DIR_IF_END +            COFFEE_END_NL
     },
     foreach : {
-      start : "^[ \t]*#+[ \t]*@foreach[ \t]+(.*?)[ \t]*\n+",
-      end   : "^[ \t]*#+[ \t]*@endfor[ \t]*\n?"
+      start :           COFFEE_SP_START +       DIR_FOREACH_START +     COFFEE_END_NLS,
+      end   :           COFFEE_SP_START +       DIR_FOREACH_END +       COFFEE_END_NL
     }
   }
 };