diff --git a/parse.leg b/parse.leg
index 28a2ee0..5d07d0d 100644
--- a/parse.leg
+++ b/parse.leg
@@ -5,6 +5,7 @@
 #include <stdlib.h>
 #include <stdarg.h>
 #include <sys/stat.h>
+#include <math.h>
 
 #include "inputBuffer.c"
 #include "class.c"
@@ -309,7 +310,7 @@ postfix		= s:atom ( "?" -		{ s = mkQuery(s) }
 			 | "+" -		{ s = mkPlus(s) }
 			 )?			{ $$ = s }
 
-atom		= string | class | dot | rule
+atom		= string | class | dot | rule | '(' - e:expression - ')' {$$=e}
 
 rule		= i:id !'='        		{ $$ = mkId(intern(yytext)) }
 
@@ -317,7 +318,7 @@ id		= < [a-zA-z_][a-zA-z_0-9]* > - 	{ $$ = mkId(intern(yytext)) }
 
 string		= '"' < [^\"]* > '"' -     	{ $$ = mkString(yytext) }
 
-class		= '['-<(!']'string)*> ']' - 	{ $$=mkClass(classify(yytext)) }
+class		= '['-<(!']'.)*> ']' - 	{ $$=mkClass(classify(yytext)) }
 
 dot		= '.' -               		{ $$=mkDot() }
 
@@ -367,7 +368,7 @@ int execute(Node *node, InputBuffer *in)
 	  return 1;
       }
       case Class: {
-	  if (testBit(get(Node,Class,array),currentChar(in))) {
+	  if (testBit(get(node,Class,array),currentChar(in))) {
           advance(in, 1);
 	      return 1;
 	  }
@@ -411,8 +412,24 @@ int execute(Node *node, InputBuffer *in)
 }
 
 int main(int argc, char **argv)
-{
+{   
     switch (argc) {
+
+      case 1:{
+          printf("affiche toi ho !\n");
+          int char_index=0;
+          char *text_file= malloc(50);
+          int ch;
+            while ( (ch = getchar()) != EOF ) {
+                printf("%c",ch);
+                text_file[char_index]=ch;
+                char_index++;
+            }
+            printf("%s",text_file);
+            inputBuffer = mkInputBuffer(text_file);
+	      break;
+         
+      }
       case 2: {
 	  inputBuffer = mkInputBuffer(argv[1]);
 	  break;
@@ -444,7 +461,10 @@ int main(int argc, char **argv)
 	  }
 	  fatal("unrecognised option: %s", argv[1]);
       }
+      
       default: {
+          printf("%i\n",argc);
+          printf("test akoezpa\n");
 	  fatal("usage: %s parsing-expression | -f filename", argv[0]);
 	  exit(1);
       }
@@ -459,10 +479,12 @@ int main(int argc, char **argv)
     size_t  line_max=0;
     ssize_t line_len=0;
     Node   *startRule= intern("start")->rule;
+    
     if (!startRule) {
 	fatal("no start rule");
 	return 1;
     }
+
     while ((line_len=getline(&line,&line_max,stdin))>=0) {
         if (line_len>0 && line[line_len-1]=='\n') {
             line[line_len-1]=0;