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      1 tree grammar SimpleCTP;
      2 options {
      3     tokenVocab = SimpleC;
      4 	language = ObjC;
      5 	ASTLabelType = ANTLRCommonTree;
      6 }
      7 
      8 scope Symbols
      9 {
     10 ANTLRCommonTree *tree;
     11 }
     12 
     13 program
     14     :   declaration+
     15     ;
     16 
     17 declaration
     18     :   variable
     19     |   ^(FUNC_DECL functionHeader)
     20     |   ^(FUNC_DEF functionHeader block)
     21     ;
     22 
     23 variable
     24     :   ^(VAR_DEF type declarator)
     25     ;
     26 
     27 declarator
     28     :   K_ID 
     29     ;
     30 
     31 functionHeader
     32     :   ^(FUNC_HDR type K_ID formalParameter+)
     33     ;
     34 
     35 formalParameter
     36     :   ^(ARG_DEF type declarator)
     37     ;
     38 
     39 type
     40     :   K_INT_TYPE
     41     |   K_CHAR  
     42     |   K_VOID
     43     |   K_ID        
     44     ;
     45 
     46 block
     47     :   ^(BLOCK variable* stat*)
     48     ;
     49 
     50 stat: forStat
     51     | expr
     52     | block
     53     ;
     54 
     55 forStat
     56     :   ^(K_FOR expr expr expr block)
     57     ;
     58 
     59 expr:   ^(K_EQEQ expr expr)
     60     |   ^(K_LT expr expr)
     61     |   ^(K_PLUS expr expr)
     62     |   ^(K_EQ K_ID e=expr) { NSLog(@"assigning \%@ to variable \%@", $e.text, $K_ID.text); }
     63     |   atom
     64     ;
     65 
     66 atom
     67     : K_ID      
     68     | K_INT      
     69     ; 
     70