corrected some useless lines

examples/aComplexObject.yml

@@ -0,0 +1,23 @@
+- 
+  anObject: 
+    asubObj: &object3
+      subsub: x
+- &object4
+  x: abc
+  y: 
+    x: *object3
+    z: 
+      - *object3
+    y: 
+      - 
+        as: sff
+        f:  34
+      - 
+        as: sfdf
+        f:  35
+      - 
+        as: sasff
+        f:  37
+- 
+  f: *object3
+

examples/hashWithLinks.yml

@@ -0,0 +1,10 @@
+---
+  users:
+    greg: &greg
+      name: greg
+      age: 31
+      email: 'isimpl@gmail.com'
+    dotmaster: *greg
+    ted: { name: ted, age: 32, email: ted@tedtalks.com }
+  something:
+    blah: 19

examples/listWithLinks.yml

@@ -0,0 +1,5 @@
+---
+  - &obj1
+    lots of milk
+  - *obj1
+  - 'something'

examples/run.js

@@ -1,12 +1,13 @@
 
 var path = process.argv[2],
     fs = require('fs'),
-    yaml = require('../lib/yaml')
+    yaml = require('../lib/yaml'),
+    sys = require('sys');
 
 if (!path)
   throw new Error('provide path to yaml file')
 
 console.log('\n')
 console.log(fs.readFileSync(path).toString())
 console.log('\noutputs:\n')
-console.log(yaml.eval(fs.readFileSync(path).toString()))
+console.log(sys.inspect(yaml.eval(fs.readFileSync(path).toString()),true,20))

lib/yaml.js

@@ -5,7 +5,7 @@
  * Version triplet.
  */
 
-exports.version = '0.1.1'
+exports.version = '0.1.2'
 
 // --- Helpers
 
@@ -53,6 +53,8 @@ var tokens = [
   [']', /^\]/],
   ['-', /^\-/],
   [':', /^[:]/],
+  ['&', /^\&([a-zA-Z0-9]*)/],
+  ['*', /^\*([a-zA-Z0-9]*)/],    
 ]
 
 /**
@@ -160,6 +162,18 @@ Parser.prototype.accept = function(type) {
     return this.advance()
 }
 
+/**
+ * Assert _value_ or throw an error _msg_.
+ *
+ * @param  {string} type
+ * @param  {string} msg
+ * @api private
+ */
+
+Parser.prototype.assert = function(val, msg) {
+  if (val) return
+  throw new Error(msg + ', ' + context(this.peek()[1].input))
+}
 /**
  * Expect _type_ or throw an error _msg_.
  *
@@ -230,7 +244,7 @@ Parser.prototype.parse = function() {
     case '[':
       return this.parseInlineList()
     case 'id':
-      return this.parseHash()
+      return this.parseHash()     
     case 'string':
       return this.advanceValue()
     case 'float':
@@ -261,15 +275,23 @@ Parser.prototype.parseDoc = function() {
  *  | id ':' - indent expr dedent
  *  )+
  */
-
+Parser.prototype.refLinks=[];
 Parser.prototype.parseHash = function() {
-  var id, hash = {}
+  var id, hash={}, ref, link
   while (this.peekType('id') && (id = this.advanceValue())) {
     this.expect(':', 'expected semi-colon after id')
-    this.ignoreSpace()
+    this.ignoreSpace()   
     if (this.accept('indent'))
       hash[id] = this.parse(),
       this.expect('dedent', 'hash not properly dedented')
+    else if (this.peekType('&')  && (ref = this.advanceValue())) //accept refs
+      this.expect('indent', 'expected indent after a ref'),
+      hash[id] = this.parse(),  
+      this.refLinks[ref]=hash[id],
+      this.expect('dedent', 'hash not properly dedented')      
+    else if (this.peekType('*')  && (link = this.advanceValue())) //accept links
+      this.assert(this.refLinks[link],'YAML not well formatted got a link but have no ref to link it to'),
+      hash[id] = this.refLinks[link]  
     else
       hash[id] = this.parse()
     this.ignoreSpace()
@@ -306,12 +328,21 @@ Parser.prototype.parseInlineHash = function() {
  */
 
 Parser.prototype.parseList = function() {
-  var list = []
+  var list = [], val
   while (this.accept('-')) {
     this.ignoreSpace()
     if (this.accept('indent'))
       list.push(this.parse()),
       this.expect('dedent', 'list item not properly dedented')
+    else if (this.peekType('&')  && (ref = this.advanceValue())) //accept refs
+      this.expect('indent', 'expected indent after a ref'),
+      val=this.parse(),
+      list.push(val),  
+      this.refLinks[ref]=val,
+      this.expect('dedent', 'hash not properly dedented')      
+    else if (this.peekType('*')  && (link = this.advanceValue())) //accept links
+      this.assert(this.refLinks[link],'YAML not well formatted got a link but have no ref to link it to'),
+      list.push( this.refLinks[link] )  
     else
       list.push(this.parse())
     this.ignoreSpace()