From 4639f449cf8957aea53d399e5261d1b228e6b724 Mon Sep 17 00:00:00 2001
From: Victor Berchet <victor@suumit.com>
Date: Tue, 13 Oct 2015 18:55:46 -0700
Subject: [PATCH] feat(Parser): associate pipes right to left

closes #4605

BREAKING CHANGE:

Before:

`1 + 1 | pipe:a | pipe:b` was parsed as `(1 + 1) | pipe:(a | pipe:b)`

After:

`1 + 1 | pipe:a | pipe:b` is parsed as `((1 + 1) | pipe:a) | pipe:b`

Closes #4716
---
 .../src/core/change_detection/parser/parser.ts | 18 +++++++++---------
 .../change_detection/change_detector_config.ts |  1 +
 .../change_detection/change_detector_spec.ts   |  8 ++++++++
 .../change_detection/parser/parser_spec.ts     | 12 ++----------
 4 files changed, 20 insertions(+), 19 deletions(-)

diff --git a/modules/angular2/src/core/change_detection/parser/parser.ts b/modules/angular2/src/core/change_detection/parser/parser.ts
index 3503cfff04..fe7550e168 100644
--- a/modules/angular2/src/core/change_detection/parser/parser.ts
+++ b/modules/angular2/src/core/change_detection/parser/parser.ts
@@ -216,6 +216,14 @@ export class _ParseAST {
     return n.toString();
   }
 
+  parseSimpleBinding(): AST {
+    var ast = this.parseChain();
+    if (!SimpleExpressionChecker.check(ast)) {
+      this.error(`Simple binding expression can only contain field access and constants'`);
+    }
+    return ast;
+  }
+
   parseChain(): AST {
     var exprs = [];
     while (this.index < this.tokens.length) {
@@ -237,14 +245,6 @@ export class _ParseAST {
     return new Chain(exprs);
   }
 
-  parseSimpleBinding(): AST {
-    var ast = this.parseChain();
-    if (!SimpleExpressionChecker.check(ast)) {
-      this.error(`Simple binding expression can only contain field access and constants'`);
-    }
-    return ast;
-  }
-
   parsePipe(): AST {
     var result = this.parseExpression();
     if (this.optionalOperator("|")) {
@@ -256,7 +256,7 @@ export class _ParseAST {
         var name = this.expectIdentifierOrKeyword();
         var args = [];
         while (this.optionalCharacter($COLON)) {
-          args.push(this.parsePipe());
+          args.push(this.parseExpression());
         }
         result = new BindingPipe(result, name, args);
       } while (this.optionalOperator("|"));
diff --git a/modules/angular2/test/core/change_detection/change_detector_config.ts b/modules/angular2/test/core/change_detection/change_detector_config.ts
index a69c69dd42..271ace03f7 100644
--- a/modules/angular2/test/core/change_detection/change_detector_config.ts
+++ b/modules/angular2/test/core/change_detection/change_detector_config.ts
@@ -408,6 +408,7 @@ var _availableDefinitions = [
   'name | pipe',
   '(name | pipe).length',
   "name | pipe:'one':address.city",
+  "name | pipe:'a':'b' | pipe:0:1:2",
   'value',
   'a',
   'address.city',
diff --git a/modules/angular2/test/core/change_detection/change_detector_spec.ts b/modules/angular2/test/core/change_detection/change_detector_spec.ts
index e594fe84dd..a63c4fd889 100644
--- a/modules/angular2/test/core/change_detection/change_detector_spec.ts
+++ b/modules/angular2/test/core/change_detection/change_detector_spec.ts
@@ -354,6 +354,14 @@ export function main() {
             expect(val.dispatcher.loggedValues).toEqual(['value one two default']);
           });
 
+          it('should associate pipes right-to-left', () => {
+            var registry = new FakePipes('pipe', () => new MultiArgPipe());
+            var person = new Person('value');
+            var val = _createChangeDetector("name | pipe:'a':'b' | pipe:0:1:2", person, registry);
+            val.changeDetector.detectChanges();
+            expect(val.dispatcher.loggedValues).toEqual(['value a b default 0 1 2']);
+          });
+
           it('should not reevaluate pure pipes unless its context or arg changes', () => {
             var pipe = new CountingPipe();
             var registry = new FakePipes('pipe', () => pipe, {pure: true});
diff --git a/modules/angular2/test/core/change_detection/parser/parser_spec.ts b/modules/angular2/test/core/change_detection/parser/parser_spec.ts
index c3ed640874..dd4577aa59 100644
--- a/modules/angular2/test/core/change_detection/parser/parser_spec.ts
+++ b/modules/angular2/test/core/change_detection/parser/parser_spec.ts
@@ -6,14 +6,6 @@ import {Unparser} from './unparser';
 import {Lexer} from 'angular2/src/core/change_detection/parser/lexer';
 import {BindingPipe, LiteralPrimitive, AST} from 'angular2/src/core/change_detection/parser/ast';
 
-class TestData {
-  constructor(public a?: any, public b?: any, public fnReturnValue?: any) {}
-
-  fn() { return this.fnReturnValue; }
-
-  add(a, b) { return a + b; }
-}
-
 export function main() {
   function createParser() { return new Parser(new Lexer(), reflector); }
 
@@ -229,8 +221,8 @@ export function main() {
           checkBinding('a[b] | c', '(a[b] | c)');
           checkBinding('a?.b | c', '(a?.b | c)');
           checkBinding('true | a', '(true | a)');
-          checkBinding('a | b:c | d', '(a | b:(c | d))');
-          checkBinding('(a | b:c) | d', '((a | b:c) | d)');
+          checkBinding('a | b:c | d', '((a | b:c) | d)');
+          checkBinding('a | b:(c | d)', '(a | b:(c | d))');
         });
 
         it('should only allow identifier or keyword as formatter names', () => {