// MyParser.H
 
#import <Foundation/Foundation.h>
@class PKParser;
 
@interface MyParser : NSObject {
    __strong NSString *scssGrammar;
    __strong PKParser *scssParser;
}
 
 
+ (MyParser *)sharedParser;
 
- (void)parseTestStringToSCSS;
 
@end
 
// MyParser.m
 
#import "MyParser.h"
#import <ParseKit/ParseKit.h>
 
@implementation MyParser
 
- (id)init
{
    self = [super init];
    if (self) {
        // Add your subclass-specific initialization here.
 
        // Load my grammer from an external file
        NSURL *fileURL = [[NSBundle mainBundle] URLForResource:@"scss" withExtension:@"grammar"];
        NSError *err = nil;
        
        scssGrammar = [NSString stringWithContentsOfFile:fileURL.path encoding:NSUTF8StringEncoding error:&err];
 
        if (err) {
            NSLog(@"%@", err);
            [[NSAlert alertWithError:err] runModal];
            return;
        }
        
  
        scssParser = [[PKParserFactory factory] parserFromGrammar:scssGrammar assembler:self error:nil];
    }
    return self;
}
 
+ (MyParser *)sharedParser
{
    static MyParser *sharedParser;
    
    @synchronized(self)
    {
        if (!sharedParser)
            sharedParser = [self new];
        return sharedParser;
    }
}
 
 
 
- (void)parseTestStringToSCSS
{
 
    NSString *scss = @".myClass { > content {} } "
                      ".myClass2 { color: #444444; }";
   
    NSError *err = nil;
    [scssParser parse:scss error:&err];
    if (err) {
        NSLog(@"%@", err);
        [[NSAlert alertWithError:err] runModal];
        return;
    }
 
 
}
 
 
 
- (void)parser:(PKParser *)p didMatchRuleset:(PKAssembly *)a
{
    NSLog(@"ruleset: %@", a.stack);
}
 
- (void)parser:(PKParser *)p didMatchSelector:(PKAssembly *)a
{
    NSLog(@"selector: %@", a.stack);
}
 
- (void)parser:(PKParser *)p didMatchProperty:(PKAssembly *)a
{
//    NSLog(@"properties: %@", a.stack);
}
 
 
 
@end